src/ap/hostapd.c

   1 /*
   2  * hostapd / Initialization and configuration
   3  * Copyright (c) 2002-2012, 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 "radius/radius_das.h"
  16 #include "drivers/driver.h"
  17 #include "hostapd.h"
  18 #include "authsrv.h"
  19 #include "sta_info.h"
  20 #include "accounting.h"
  21 #include "ap_list.h"
  22 #include "beacon.h"
  23 #include "iapp.h"
  24 #include "ieee802_1x.h"
  25 #include "ieee802_11_auth.h"
  26 #include "vlan_init.h"
  27 #include "wpa_auth.h"
  28 #include "wps_hostapd.h"
  29 #include "hw_features.h"
  30 #include "wpa_auth_glue.h"
  31 #include "ap_drv_ops.h"
  32 #include "ap_config.h"
  33 #include "p2p_hostapd.h"
  34 #include "gas_serv.h"
  35
  36
  37 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason);
  38 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd);
  39 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd);
  40
  41 extern int wpa_debug_level;
  42
  43
  44 int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
  45                                int (*cb)(struct hostapd_iface *iface,
  46                                          void *ctx), void *ctx)
  47 {
  48         size_t i;
  49         int ret;
  50
  51         for (i = 0; i < interfaces->count; i++) {
  52                 ret = cb(interfaces->iface[i], ctx);
  53                 if (ret)
  54                         return ret;
  55         }
  56
  57         return 0;
  58 }
  59
  60
  61 static void hostapd_reload_bss(struct hostapd_data *hapd)
  62 {
  63 #ifndef CONFIG_NO_RADIUS
  64         radius_client_reconfig(hapd->radius, hapd->conf->radius);
  65 #endif /* CONFIG_NO_RADIUS */
  66
  67         if (hostapd_setup_wpa_psk(hapd->conf)) {
  68                 wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK "
  69                            "after reloading configuration");
  70         }
  71
  72         if (hapd->conf->ieee802_1x || hapd->conf->wpa)
  73                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1);
  74         else
  75                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
  76
  77         if (hapd->conf->wpa && hapd->wpa_auth == NULL) {
  78                 hostapd_setup_wpa(hapd);
  79                 if (hapd->wpa_auth)
  80                         wpa_init_keys(hapd->wpa_auth);
  81         } else if (hapd->conf->wpa) {
  82                 const u8 *wpa_ie;
  83                 size_t wpa_ie_len;
  84                 hostapd_reconfig_wpa(hapd);
  85                 wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len);
  86                 if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len))
  87                         wpa_printf(MSG_ERROR, "Failed to configure WPA IE for "
  88                                    "the kernel driver.");
  89         } else if (hapd->wpa_auth) {
  90                 wpa_deinit(hapd->wpa_auth);
  91                 hapd->wpa_auth = NULL;
  92                 hostapd_set_privacy(hapd, 0);
  93                 hostapd_setup_encryption(hapd->conf->iface, hapd);
  94                 hostapd_set_generic_elem(hapd, (u8 *) "", 0);
  95         }
  96
  97         ieee802_11_set_beacon(hapd);
  98         hostapd_update_wps(hapd);
  99
 100         if (hapd->conf->ssid.ssid_set &&
 101             hostapd_set_ssid(hapd, (u8 *) hapd->conf->ssid.ssid,
 102                              hapd->conf->ssid.ssid_len)) {
 103                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 104                 /* try to continue */
 105         }
 106         wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface);
 107 }
 108
 109
 110 int hostapd_reload_config(struct hostapd_iface *iface)
 111 {
 112         struct hostapd_data *hapd = iface->bss[0];
 113         struct hostapd_config *newconf, *oldconf;
 114         size_t j;
 115
 116         if (iface->config_read_cb == NULL)
 117                 return -1;
 118         newconf = iface->config_read_cb(iface->config_fname);
 119         if (newconf == NULL)
 120                 return -1;
 121
 122         /*
 123          * Deauthenticate all stations since the new configuration may not
 124          * allow them to use the BSS anymore.
 125          */
 126         for (j = 0; j < iface->num_bss; j++) {
 127                 hostapd_flush_old_stations(iface->bss[j],
 128                                            WLAN_REASON_PREV_AUTH_NOT_VALID);
 129                 hostapd_broadcast_wep_clear(iface->bss[j]);
 130
 131 #ifndef CONFIG_NO_RADIUS
 132                 /* TODO: update dynamic data based on changed configuration
 133                  * items (e.g., open/close sockets, etc.) */
 134                 radius_client_flush(iface->bss[j]->radius, 0);
 135 #endif /* CONFIG_NO_RADIUS */
 136         }
 137
 138         oldconf = hapd->iconf;
 139         iface->conf = newconf;
 140
 141         for (j = 0; j < iface->num_bss; j++) {
 142                 hapd = iface->bss[j];
 143                 hapd->iconf = newconf;
 144                 hapd->conf = &newconf->bss[j];
 145                 hostapd_reload_bss(hapd);
 146         }
 147
 148         hostapd_config_free(oldconf);
 149
 150
 151         return 0;
 152 }
 153
 154
 155 static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd,
 156                                               char *ifname)
 157 {
 158         int i;
 159
 160         for (i = 0; i < NUM_WEP_KEYS; i++) {
 161                 if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE, NULL, i,
 162                                         0, NULL, 0, NULL, 0)) {
 163                         wpa_printf(MSG_DEBUG, "Failed to clear default "
 164                                    "encryption keys (ifname=%s keyidx=%d)",
 165                                    ifname, i);
 166                 }
 167         }
 168 #ifdef CONFIG_IEEE80211W
 169         if (hapd->conf->ieee80211w) {
 170                 for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) {
 171                         if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE,
 172                                                 NULL, i, 0, NULL,
 173                                                 0, NULL, 0)) {
 174                                 wpa_printf(MSG_DEBUG, "Failed to clear "
 175                                            "default mgmt encryption keys "
 176                                            "(ifname=%s keyidx=%d)", ifname, i);
 177                         }
 178                 }
 179         }
 180 #endif /* CONFIG_IEEE80211W */
 181 }
 182
 183
 184 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd)
 185 {
 186         hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface);
 187         return 0;
 188 }
 189
 190
 191 static int hostapd_broadcast_wep_set(struct hostapd_data *hapd)
 192 {
 193         int errors = 0, idx;
 194         struct hostapd_ssid *ssid = &hapd->conf->ssid;
 195
 196         idx = ssid->wep.idx;
 197         if (ssid->wep.default_len &&
 198             hostapd_drv_set_key(hapd->conf->iface,
 199                                 hapd, WPA_ALG_WEP, broadcast_ether_addr, idx,
 200                                 1, NULL, 0, ssid->wep.key[idx],
 201                                 ssid->wep.len[idx])) {
 202                 wpa_printf(MSG_WARNING, "Could not set WEP encryption.");
 203                 errors++;
 204         }
 205
 206         if (ssid->dyn_vlan_keys) {
 207                 size_t i;
 208                 for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) {
 209                         const char *ifname;
 210                         struct hostapd_wep_keys *key = ssid->dyn_vlan_keys[i];
 211                         if (key == NULL)
 212                                 continue;
 213                         ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan,
 214                                                             i);
 215                         if (ifname == NULL)
 216                                 continue;
 217
 218                         idx = key->idx;
 219                         if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_WEP,
 220                                                 broadcast_ether_addr, idx, 1,
 221                                                 NULL, 0, key->key[idx],
 222                                                 key->len[idx])) {
 223                                 wpa_printf(MSG_WARNING, "Could not set "
 224                                            "dynamic VLAN WEP encryption.");
 225                                 errors++;
 226                         }
 227                 }
 228         }
 229
 230         return errors;
 231 }
 232
 233
 234 static void hostapd_free_hapd_data(struct hostapd_data *hapd)
 235 {
 236         iapp_deinit(hapd->iapp);
 237         hapd->iapp = NULL;
 238         accounting_deinit(hapd);
 239         hostapd_deinit_wpa(hapd);
 240         vlan_deinit(hapd);
 241         hostapd_acl_deinit(hapd);
 242 #ifndef CONFIG_NO_RADIUS
 243         radius_client_deinit(hapd->radius);
 244         hapd->radius = NULL;
 245         radius_das_deinit(hapd->radius_das);
 246         hapd->radius_das = NULL;
 247 #endif /* CONFIG_NO_RADIUS */
 248
 249         hostapd_deinit_wps(hapd);
 250
 251         authsrv_deinit(hapd);
 252
 253         if (hapd->interface_added &&
 254             hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
 255                 wpa_printf(MSG_WARNING, "Failed to remove BSS interface %s",
 256                            hapd->conf->iface);
 257         }
 258
 259         os_free(hapd->probereq_cb);
 260         hapd->probereq_cb = NULL;
 261
 262 #ifdef CONFIG_P2P
 263         wpabuf_free(hapd->p2p_beacon_ie);
 264         hapd->p2p_beacon_ie = NULL;
 265         wpabuf_free(hapd->p2p_probe_resp_ie);
 266         hapd->p2p_probe_resp_ie = NULL;
 267 #endif /* CONFIG_P2P */
 268
 269         wpabuf_free(hapd->time_adv);
 270
 271 #ifdef CONFIG_INTERWORKING
 272         gas_serv_deinit(hapd);
 273 #endif /* CONFIG_INTERWORKING */
 274 }
 275
 276
 277 /**
 278  * hostapd_cleanup - Per-BSS cleanup (deinitialization)
 279  * @hapd: Pointer to BSS data
 280  *
 281  * This function is used to free all per-BSS data structures and resources.
 282  * This gets called in a loop for each BSS between calls to
 283  * hostapd_cleanup_iface_pre() and hostapd_cleanup_iface() when an interface
 284  * is deinitialized. Most of the modules that are initialized in
 285  * hostapd_setup_bss() are deinitialized here.
 286  */
 287 static void hostapd_cleanup(struct hostapd_data *hapd)
 288 {
 289         if (hapd->iface->ctrl_iface_deinit)
 290                 hapd->iface->ctrl_iface_deinit(hapd);
 291         hostapd_free_hapd_data(hapd);
 292 }
 293
 294
 295 /**
 296  * hostapd_cleanup_iface_pre - Preliminary per-interface cleanup
 297  * @iface: Pointer to interface data
 298  *
 299  * This function is called before per-BSS data structures are deinitialized
 300  * with hostapd_cleanup().
 301  */
 302 static void hostapd_cleanup_iface_pre(struct hostapd_iface *iface)
 303 {
 304 }
 305
 306
 307 static void hostapd_cleanup_iface_partial(struct hostapd_iface *iface)
 308 {
 309         hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
 310         iface->hw_features = NULL;
 311         os_free(iface->current_rates);
 312         iface->current_rates = NULL;
 313         os_free(iface->basic_rates);
 314         iface->basic_rates = NULL;
 315         ap_list_deinit(iface);
 316 }
 317
 318
 319 /**
 320  * hostapd_cleanup_iface - Complete per-interface cleanup
 321  * @iface: Pointer to interface data
 322  *
 323  * This function is called after per-BSS data structures are deinitialized
 324  * with hostapd_cleanup().
 325  */
 326 static void hostapd_cleanup_iface(struct hostapd_iface *iface)
 327 {
 328         hostapd_cleanup_iface_partial(iface);
 329         hostapd_config_free(iface->conf);
 330         iface->conf = NULL;
 331
 332         os_free(iface->config_fname);
 333         os_free(iface->bss);
 334         os_free(iface);
 335 }
 336
 337
 338 static void hostapd_clear_wep(struct hostapd_data *hapd)
 339 {
 340         if (hapd->drv_priv) {
 341                 hostapd_set_privacy(hapd, 0);
 342                 hostapd_broadcast_wep_clear(hapd);
 343         }
 344 }
 345
 346
 347 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
 348 {
 349         int i;
 350
 351         hostapd_broadcast_wep_set(hapd);
 352
 353         if (hapd->conf->ssid.wep.default_len) {
 354                 hostapd_set_privacy(hapd, 1);
 355                 return 0;
 356         }
 357
 358         /*
 359          * When IEEE 802.1X is not enabled, the driver may need to know how to
 360          * set authentication algorithms for static WEP.
 361          */
 362         hostapd_drv_set_authmode(hapd, hapd->conf->auth_algs);
 363
 364         for (i = 0; i < 4; i++) {
 365                 if (hapd->conf->ssid.wep.key[i] &&
 366                     hostapd_drv_set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
 367                                         i == hapd->conf->ssid.wep.idx, NULL, 0,
 368                                         hapd->conf->ssid.wep.key[i],
 369                                         hapd->conf->ssid.wep.len[i])) {
 370                         wpa_printf(MSG_WARNING, "Could not set WEP "
 371                                    "encryption.");
 372                         return -1;
 373                 }
 374                 if (hapd->conf->ssid.wep.key[i] &&
 375                     i == hapd->conf->ssid.wep.idx)
 376                         hostapd_set_privacy(hapd, 1);
 377         }
 378
 379         return 0;
 380 }
 381
 382
 383 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason)
 384 {
 385         int ret = 0;
 386         u8 addr[ETH_ALEN];
 387
 388         if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL)
 389                 return 0;
 390
 391         wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Flushing old station entries");
 392         if (hostapd_flush(hapd)) {
 393                 wpa_msg(hapd->msg_ctx, MSG_WARNING, "Could not connect to "
 394                         "kernel driver");
 395                 ret = -1;
 396         }
 397         wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Deauthenticate all stations");
 398         os_memset(addr, 0xff, ETH_ALEN);
 399         hostapd_drv_sta_deauth(hapd, addr, reason);
 400         hostapd_free_stas(hapd);
 401
 402         return ret;
 403 }
 404
 405
 406 /**
 407  * hostapd_validate_bssid_configuration - Validate BSSID configuration
 408  * @iface: Pointer to interface data
 409  * Returns: 0 on success, -1 on failure
 410  *
 411  * This function is used to validate that the configured BSSIDs are valid.
 412  */
 413 static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
 414 {
 415         u8 mask[ETH_ALEN] = { 0 };
 416         struct hostapd_data *hapd = iface->bss[0];
 417         unsigned int i = iface->conf->num_bss, bits = 0, j;
 418         int auto_addr = 0;
 419
 420         if (hostapd_drv_none(hapd))
 421                 return 0;
 422
 423         /* Generate BSSID mask that is large enough to cover the BSSIDs. */
 424
 425         /* Determine the bits necessary to cover the number of BSSIDs. */
 426         for (i--; i; i >>= 1)
 427                 bits++;
 428
 429         /* Determine the bits necessary to any configured BSSIDs,
 430            if they are higher than the number of BSSIDs. */
 431         for (j = 0; j < iface->conf->num_bss; j++) {
 432                 if (hostapd_mac_comp_empty(iface->conf->bss[j].bssid) == 0) {
 433                         if (j)
 434                                 auto_addr++;
 435                         continue;
 436                 }
 437
 438                 for (i = 0; i < ETH_ALEN; i++) {
 439                         mask[i] |=
 440                                 iface->conf->bss[j].bssid[i] ^
 441                                 hapd->own_addr[i];
 442                 }
 443         }
 444
 445         if (!auto_addr)
 446                 goto skip_mask_ext;
 447
 448         for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
 449                 ;
 450         j = 0;
 451         if (i < ETH_ALEN) {
 452                 j = (5 - i) * 8;
 453
 454                 while (mask[i] != 0) {
 455                         mask[i] >>= 1;
 456                         j++;
 457                 }
 458         }
 459
 460         if (bits < j)
 461                 bits = j;
 462
 463         if (bits > 40) {
 464                 wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
 465                            bits);
 466                 return -1;
 467         }
 468
 469         os_memset(mask, 0xff, ETH_ALEN);
 470         j = bits / 8;
 471         for (i = 5; i > 5 - j; i--)
 472                 mask[i] = 0;
 473         j = bits % 8;
 474         while (j--)
 475                 mask[i] <<= 1;
 476
 477 skip_mask_ext:
 478         wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
 479                    (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
 480
 481         if (!auto_addr)
 482                 return 0;
 483
 484         for (i = 0; i < ETH_ALEN; i++) {
 485                 if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
 486                         wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
 487                                    " for start address " MACSTR ".",
 488                                    MAC2STR(mask), MAC2STR(hapd->own_addr));
 489                         wpa_printf(MSG_ERROR, "Start address must be the "
 490                                    "first address in the block (i.e., addr "
 491                                    "AND mask == addr).");
 492                         return -1;
 493                 }
 494         }
 495
 496         return 0;
 497 }
 498
 499
 500 static int mac_in_conf(struct hostapd_config *conf, const void *a)
 501 {
 502         size_t i;
 503
 504         for (i = 0; i < conf->num_bss; i++) {
 505                 if (hostapd_mac_comp(conf->bss[i].bssid, a) == 0) {
 506                         return 1;
 507                 }
 508         }
 509
 510         return 0;
 511 }
 512
 513
 514 #ifndef CONFIG_NO_RADIUS
 515
 516 static int hostapd_das_nas_mismatch(struct hostapd_data *hapd,
 517                                     struct radius_das_attrs *attr)
 518 {
 519         /* TODO */
 520         return 0;
 521 }
 522
 523
 524 static struct sta_info * hostapd_das_find_sta(struct hostapd_data *hapd,
 525                                               struct radius_das_attrs *attr)
 526 {
 527         struct sta_info *sta = NULL;
 528         char buf[128];
 529
 530         if (attr->sta_addr)
 531                 sta = ap_get_sta(hapd, attr->sta_addr);
 532
 533         if (sta == NULL && attr->acct_session_id &&
 534             attr->acct_session_id_len == 17) {
 535                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 536                         os_snprintf(buf, sizeof(buf), "%08X-%08X",
 537                                     sta->acct_session_id_hi,
 538                                     sta->acct_session_id_lo);
 539                         if (os_memcmp(attr->acct_session_id, buf, 17) == 0)
 540                                 break;
 541                 }
 542         }
 543
 544         if (sta == NULL && attr->cui) {
 545                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 546                         struct wpabuf *cui;
 547                         cui = ieee802_1x_get_radius_cui(sta->eapol_sm);
 548                         if (cui && wpabuf_len(cui) == attr->cui_len &&
 549                             os_memcmp(wpabuf_head(cui), attr->cui,
 550                                       attr->cui_len) == 0)
 551                                 break;
 552                 }
 553         }
 554
 555         if (sta == NULL && attr->user_name) {
 556                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 557                         u8 *identity;
 558                         size_t identity_len;
 559                         identity = ieee802_1x_get_identity(sta->eapol_sm,
 560                                                            &identity_len);
 561                         if (identity &&
 562                             identity_len == attr->user_name_len &&
 563                             os_memcmp(identity, attr->user_name, identity_len)
 564                             == 0)
 565                                 break;
 566                 }
 567         }
 568
 569         return sta;
 570 }
 571
 572
 573 static enum radius_das_res
 574 hostapd_das_disconnect(void *ctx, struct radius_das_attrs *attr)
 575 {
 576         struct hostapd_data *hapd = ctx;
 577         struct sta_info *sta;
 578
 579         if (hostapd_das_nas_mismatch(hapd, attr))
 580                 return RADIUS_DAS_NAS_MISMATCH;
 581
 582         sta = hostapd_das_find_sta(hapd, attr);
 583         if (sta == NULL)
 584                 return RADIUS_DAS_SESSION_NOT_FOUND;
 585
 586         hostapd_drv_sta_deauth(hapd, sta->addr,
 587                                WLAN_REASON_PREV_AUTH_NOT_VALID);
 588         ap_sta_deauthenticate(hapd, sta, WLAN_REASON_PREV_AUTH_NOT_VALID);
 589
 590         return RADIUS_DAS_SUCCESS;
 591 }
 592
 593 #endif /* CONFIG_NO_RADIUS */
 594
 595
 596 /**
 597  * hostapd_setup_bss - Per-BSS setup (initialization)
 598  * @hapd: Pointer to BSS data
 599  * @first: Whether this BSS is the first BSS of an interface
 600  *
 601  * This function is used to initialize all per-BSS data structures and
 602  * resources. This gets called in a loop for each BSS when an interface is
 603  * initialized. Most of the modules that are initialized here will be
 604  * deinitialized in hostapd_cleanup().
 605  */
 606 static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
 607 {
 608         struct hostapd_bss_config *conf = hapd->conf;
 609         u8 ssid[HOSTAPD_MAX_SSID_LEN + 1];
 610         int ssid_len, set_ssid;
 611         char force_ifname[IFNAMSIZ];
 612         u8 if_addr[ETH_ALEN];
 613
 614         if (!first) {
 615                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0) {
 616                         /* Allocate the next available BSSID. */
 617                         do {
 618                                 inc_byte_array(hapd->own_addr, ETH_ALEN);
 619                         } while (mac_in_conf(hapd->iconf, hapd->own_addr));
 620                 } else {
 621                         /* Allocate the configured BSSID. */
 622                         os_memcpy(hapd->own_addr, hapd->conf->bssid, ETH_ALEN);
 623
 624                         if (hostapd_mac_comp(hapd->own_addr,
 625                                              hapd->iface->bss[0]->own_addr) ==
 626                             0) {
 627                                 wpa_printf(MSG_ERROR, "BSS '%s' may not have "
 628                                            "BSSID set to the MAC address of "
 629                                            "the radio", hapd->conf->iface);
 630                                 return -1;
 631                         }
 632                 }
 633
 634                 hapd->interface_added = 1;
 635                 if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
 636                                    hapd->conf->iface, hapd->own_addr, hapd,
 637                                    &hapd->drv_priv, force_ifname, if_addr,
 638                                    hapd->conf->bridge[0] ? hapd->conf->bridge :
 639                                    NULL)) {
 640                         wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
 641                                    MACSTR ")", MAC2STR(hapd->own_addr));
 642                         return -1;
 643                 }
 644         }
 645
 646         if (conf->wmm_enabled < 0)
 647                 conf->wmm_enabled = hapd->iconf->ieee80211n;
 648
 649         hostapd_flush_old_stations(hapd, WLAN_REASON_PREV_AUTH_NOT_VALID);
 650         hostapd_set_privacy(hapd, 0);
 651
 652         hostapd_broadcast_wep_clear(hapd);
 653         if (hostapd_setup_encryption(hapd->conf->iface, hapd))
 654                 return -1;
 655
 656         /*
 657          * Fetch the SSID from the system and use it or,
 658          * if one was specified in the config file, verify they
 659          * match.
 660          */
 661         ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
 662         if (ssid_len < 0) {
 663                 wpa_printf(MSG_ERROR, "Could not read SSID from system");
 664                 return -1;
 665         }
 666         if (conf->ssid.ssid_set) {
 667                 /*
 668                  * If SSID is specified in the config file and it differs
 669                  * from what is being used then force installation of the
 670                  * new SSID.
 671                  */
 672                 set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
 673                             os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
 674         } else {
 675                 /*
 676                  * No SSID in the config file; just use the one we got
 677                  * from the system.
 678                  */
 679                 set_ssid = 0;
 680                 conf->ssid.ssid_len = ssid_len;
 681                 os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
 682                 conf->ssid.ssid[conf->ssid.ssid_len] = '\0';
 683         }
 684
 685         if (!hostapd_drv_none(hapd)) {
 686                 wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
 687                            " and ssid '%s'",
 688                            hapd->conf->iface, MAC2STR(hapd->own_addr),
 689                            hapd->conf->ssid.ssid);
 690         }
 691
 692         if (hostapd_setup_wpa_psk(conf)) {
 693                 wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
 694                 return -1;
 695         }
 696
 697         /* Set SSID for the kernel driver (to be used in beacon and probe
 698          * response frames) */
 699         if (set_ssid && hostapd_set_ssid(hapd, (u8 *) conf->ssid.ssid,
 700                                          conf->ssid.ssid_len)) {
 701                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 702                 return -1;
 703         }
 704
 705         if (wpa_debug_level == MSG_MSGDUMP)
 706                 conf->radius->msg_dumps = 1;
 707 #ifndef CONFIG_NO_RADIUS
 708         hapd->radius = radius_client_init(hapd, conf->radius);
 709         if (hapd->radius == NULL) {
 710                 wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
 711                 return -1;
 712         }
 713
 714         if (hapd->conf->radius_das_port) {
 715                 struct radius_das_conf das_conf;
 716                 os_memset(&das_conf, 0, sizeof(das_conf));
 717                 das_conf.port = hapd->conf->radius_das_port;
 718                 das_conf.shared_secret = hapd->conf->radius_das_shared_secret;
 719                 das_conf.shared_secret_len =
 720                         hapd->conf->radius_das_shared_secret_len;
 721                 das_conf.client_addr = &hapd->conf->radius_das_client_addr;
 722                 das_conf.time_window = hapd->conf->radius_das_time_window;
 723                 das_conf.require_event_timestamp =
 724                         hapd->conf->radius_das_require_event_timestamp;
 725                 das_conf.ctx = hapd;
 726                 das_conf.disconnect = hostapd_das_disconnect;
 727                 hapd->radius_das = radius_das_init(&das_conf);
 728                 if (hapd->radius_das == NULL) {
 729                         wpa_printf(MSG_ERROR, "RADIUS DAS initialization "
 730                                    "failed.");
 731                         return -1;
 732                 }
 733         }
 734 #endif /* CONFIG_NO_RADIUS */
 735
 736         if (hostapd_acl_init(hapd)) {
 737                 wpa_printf(MSG_ERROR, "ACL initialization failed.");
 738                 return -1;
 739         }
 740         if (hostapd_init_wps(hapd, conf))
 741                 return -1;
 742
 743         if (authsrv_init(hapd) < 0)
 744                 return -1;
 745
 746         if (ieee802_1x_init(hapd)) {
 747                 wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
 748                 return -1;
 749         }
 750
 751         if (hapd->conf->wpa && hostapd_setup_wpa(hapd))
 752                 return -1;
 753
 754         if (accounting_init(hapd)) {
 755                 wpa_printf(MSG_ERROR, "Accounting initialization failed.");
 756                 return -1;
 757         }
 758
 759         if (hapd->conf->ieee802_11f &&
 760             (hapd->iapp = iapp_init(hapd, hapd->conf->iapp_iface)) == NULL) {
 761                 wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
 762                            "failed.");
 763                 return -1;
 764         }
 765
 766 #ifdef CONFIG_INTERWORKING
 767         if (gas_serv_init(hapd)) {
 768                 wpa_printf(MSG_ERROR, "GAS server initialization failed");
 769                 return -1;
 770         }
 771 #endif /* CONFIG_INTERWORKING */
 772
 773         if (hapd->iface->ctrl_iface_init &&
 774             hapd->iface->ctrl_iface_init(hapd)) {
 775                 wpa_printf(MSG_ERROR, "Failed to setup control interface");
 776                 return -1;
 777         }
 778
 779         if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
 780                 wpa_printf(MSG_ERROR, "VLAN initialization failed.");
 781                 return -1;
 782         }
 783
 784         ieee802_11_set_beacon(hapd);
 785
 786         if (hapd->wpa_auth && wpa_init_keys(hapd->wpa_auth) < 0)
 787                 return -1;
 788
 789         if (hapd->driver && hapd->driver->set_operstate)
 790                 hapd->driver->set_operstate(hapd->drv_priv, 1);
 791
 792         return 0;
 793 }
 794
 795
 796 static void hostapd_tx_queue_params(struct hostapd_iface *iface)
 797 {
 798         struct hostapd_data *hapd = iface->bss[0];
 799         int i;
 800         struct hostapd_tx_queue_params *p;
 801
 802         for (i = 0; i < NUM_TX_QUEUES; i++) {
 803                 p = &iface->conf->tx_queue[i];
 804
 805                 if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
 806                                                 p->cwmax, p->burst)) {
 807                         wpa_printf(MSG_DEBUG, "Failed to set TX queue "
 808                                    "parameters for queue %d.", i);
 809                         /* Continue anyway */
 810                 }
 811         }
 812 }
 813
 814
 815 static int setup_interface(struct hostapd_iface *iface)
 816 {
 817         struct hostapd_data *hapd = iface->bss[0];
 818         size_t i;
 819         char country[4];
 820
 821         /*
 822          * Make sure that all BSSes get configured with a pointer to the same
 823          * driver interface.
 824          */
 825         for (i = 1; i < iface->num_bss; i++) {
 826                 iface->bss[i]->driver = hapd->driver;
 827                 iface->bss[i]->drv_priv = hapd->drv_priv;
 828         }
 829
 830         if (hostapd_validate_bssid_configuration(iface))
 831                 return -1;
 832
 833         if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
 834                 os_memcpy(country, hapd->iconf->country, 3);
 835                 country[3] = '\0';
 836                 if (hostapd_set_country(hapd, country) < 0) {
 837                         wpa_printf(MSG_ERROR, "Failed to set country code");
 838                         return -1;
 839                 }
 840         }
 841
 842         if (hostapd_get_hw_features(iface)) {
 843                 /* Not all drivers support this yet, so continue without hw
 844                  * feature data. */
 845         } else {
 846                 int ret = hostapd_select_hw_mode(iface);
 847                 if (ret < 0) {
 848                         wpa_printf(MSG_ERROR, "Could not select hw_mode and "
 849                                    "channel. (%d)", ret);
 850                         return -1;
 851                 }
 852                 ret = hostapd_check_ht_capab(iface);
 853                 if (ret < 0)
 854                         return -1;
 855                 if (ret == 1) {
 856                         wpa_printf(MSG_DEBUG, "Interface initialization will "
 857                                    "be completed in a callback");
 858                         return 0;
 859                 }
 860         }
 861         return hostapd_setup_interface_complete(iface, 0);
 862 }
 863
 864
 865 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
 866 {
 867         struct hostapd_data *hapd = iface->bss[0];
 868         size_t j;
 869         u8 *prev_addr;
 870
 871         if (err) {
 872                 wpa_printf(MSG_ERROR, "Interface initialization failed");
 873                 eloop_terminate();
 874                 return -1;
 875         }
 876
 877         wpa_printf(MSG_DEBUG, "Completing interface initialization");
 878         if (hapd->iconf->channel) {
 879                 iface->freq = hostapd_hw_get_freq(hapd, hapd->iconf->channel);
 880                 wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
 881                            "Frequency: %d MHz",
 882                            hostapd_hw_mode_txt(hapd->iconf->hw_mode),
 883                            hapd->iconf->channel, iface->freq);
 884
 885                 if (hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
 886                                      hapd->iconf->channel,
 887                                      hapd->iconf->ieee80211n,
 888                                      hapd->iconf->secondary_channel)) {
 889                         wpa_printf(MSG_ERROR, "Could not set channel for "
 890                                    "kernel driver");
 891                         return -1;
 892                 }
 893         }
 894
 895         if (iface->current_mode) {
 896                 if (hostapd_prepare_rates(iface, iface->current_mode)) {
 897                         wpa_printf(MSG_ERROR, "Failed to prepare rates "
 898                                    "table.");
 899                         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
 900                                        HOSTAPD_LEVEL_WARNING,
 901                                        "Failed to prepare rates table.");
 902                         return -1;
 903                 }
 904         }
 905
 906         if (hapd->iconf->rts_threshold > -1 &&
 907             hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
 908                 wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
 909                            "kernel driver");
 910                 return -1;
 911         }
 912
 913         if (hapd->iconf->fragm_threshold > -1 &&
 914             hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
 915                 wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
 916                            "for kernel driver");
 917                 return -1;
 918         }
 919
 920         prev_addr = hapd->own_addr;
 921
 922         for (j = 0; j < iface->num_bss; j++) {
 923                 hapd = iface->bss[j];
 924                 if (j)
 925                         os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
 926                 if (hostapd_setup_bss(hapd, j == 0))
 927                         return -1;
 928                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
 929                         prev_addr = hapd->own_addr;
 930         }
 931
 932         hostapd_tx_queue_params(iface);
 933
 934         ap_list_init(iface);
 935
 936         if (hostapd_driver_commit(hapd) < 0) {
 937                 wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
 938                            "configuration", __func__);
 939                 return -1;
 940         }
 941
 942         /*
 943          * WPS UPnP module can be initialized only when the "upnp_iface" is up.
 944          * If "interface" and "upnp_iface" are the same (e.g., non-bridge
 945          * mode), the interface is up only after driver_commit, so initialize
 946          * WPS after driver_commit.
 947          */
 948         for (j = 0; j < iface->num_bss; j++) {
 949                 if (hostapd_init_wps_complete(iface->bss[j]))
 950                         return -1;
 951         }
 952
 953         if (hapd->setup_complete_cb)
 954                 hapd->setup_complete_cb(hapd->setup_complete_cb_ctx);
 955
 956         wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
 957                    iface->bss[0]->conf->iface);
 958
 959         return 0;
 960 }
 961
 962
 963 /**
 964  * hostapd_setup_interface - Setup of an interface
 965  * @iface: Pointer to interface data.
 966  * Returns: 0 on success, -1 on failure
 967  *
 968  * Initializes the driver interface, validates the configuration,
 969  * and sets driver parameters based on the configuration.
 970  * Flushes old stations, sets the channel, encryption,
 971  * beacons, and WDS links based on the configuration.
 972  */
 973 int hostapd_setup_interface(struct hostapd_iface *iface)
 974 {
 975         int ret;
 976
 977         ret = setup_interface(iface);
 978         if (ret) {
 979                 wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
 980                            iface->bss[0]->conf->iface);
 981                 return -1;
 982         }
 983
 984         return 0;
 985 }
 986
 987
 988 /**
 989  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
 990  * @hapd_iface: Pointer to interface data
 991  * @conf: Pointer to per-interface configuration
 992  * @bss: Pointer to per-BSS configuration for this BSS
 993  * Returns: Pointer to allocated BSS data
 994  *
 995  * This function is used to allocate per-BSS data structure. This data will be
 996  * freed after hostapd_cleanup() is called for it during interface
 997  * deinitialization.
 998  */
 999 struct hostapd_data *
1000 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
1001                        struct hostapd_config *conf,
1002                        struct hostapd_bss_config *bss)
1003 {
1004         struct hostapd_data *hapd;
1005
1006         hapd = os_zalloc(sizeof(*hapd));
1007         if (hapd == NULL)
1008                 return NULL;
1009
1010         hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
1011         hapd->iconf = conf;
1012         hapd->conf = bss;
1013         hapd->iface = hapd_iface;
1014         hapd->driver = hapd->iconf->driver;
1015         hapd->ctrl_sock = -1;
1016
1017         return hapd;
1018 }
1019
1020
1021 void hostapd_interface_deinit(struct hostapd_iface *iface)
1022 {
1023         size_t j;
1024
1025         if (iface == NULL)
1026                 return;
1027
1028         hostapd_cleanup_iface_pre(iface);
1029         for (j = 0; j < iface->num_bss; j++) {
1030                 struct hostapd_data *hapd = iface->bss[j];
1031                 hostapd_free_stas(hapd);
1032                 hostapd_flush_old_stations(hapd, WLAN_REASON_DEAUTH_LEAVING);
1033                 hostapd_clear_wep(hapd);
1034                 hostapd_cleanup(hapd);
1035         }
1036 }
1037
1038
1039 void hostapd_interface_free(struct hostapd_iface *iface)
1040 {
1041         size_t j;
1042         for (j = 0; j < iface->num_bss; j++)
1043                 os_free(iface->bss[j]);
1044         hostapd_cleanup_iface(iface);
1045 }
1046
1047
1048 /**
1049  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
1050  * @hapd: Pointer to BSS data
1051  * @sta: Pointer to the associated STA data
1052  * @reassoc: 1 to indicate this was a re-association; 0 = first association
1053  *
1054  * This function will be called whenever a station associates with the AP. It
1055  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
1056  * from drv_callbacks.c based on driver events for drivers that take care of
1057  * management frames (IEEE 802.11 authentication and association) internally.
1058  */
1059 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
1060                            int reassoc)
1061 {
1062         if (hapd->tkip_countermeasures) {
1063                 hostapd_drv_sta_deauth(hapd, sta->addr,
1064                                        WLAN_REASON_MICHAEL_MIC_FAILURE);
1065                 return;
1066         }
1067
1068         hostapd_prune_associations(hapd, sta->addr);
1069
1070         /* IEEE 802.11F (IAPP) */
1071         if (hapd->conf->ieee802_11f)
1072                 iapp_new_station(hapd->iapp, sta);
1073
1074 #ifdef CONFIG_P2P
1075         if (sta->p2p_ie == NULL && !sta->no_p2p_set) {
1076                 sta->no_p2p_set = 1;
1077                 hapd->num_sta_no_p2p++;
1078                 if (hapd->num_sta_no_p2p == 1)
1079                         hostapd_p2p_non_p2p_sta_connected(hapd);
1080         }
1081 #endif /* CONFIG_P2P */
1082
1083         /* Start accounting here, if IEEE 802.1X and WPA are not used.
1084          * IEEE 802.1X/WPA code will start accounting after the station has
1085          * been authorized. */
1086         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa)
1087                 accounting_sta_start(hapd, sta);
1088
1089         /* Start IEEE 802.1X authentication process for new stations */
1090         ieee802_1x_new_station(hapd, sta);
1091         if (reassoc) {
1092                 if (sta->auth_alg != WLAN_AUTH_FT &&
1093                     !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
1094                         wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
1095         } else
1096                 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
1097
1098         wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
1099                    "for " MACSTR " (%d seconds - ap_max_inactivity)",
1100                    __func__, MAC2STR(sta->addr),
1101                    hapd->conf->ap_max_inactivity);
1102         eloop_cancel_timeout(ap_handle_timer, hapd, sta);
1103         eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
1104                                ap_handle_timer, hapd, sta);
1105 }