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