src/ap/hostapd.c

   1 /*
   2  * hostapd / Initialization and configuration
   3  * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "utils/includes.h"
  16
  17 #include "utils/common.h"
  18 #include "utils/eloop.h"
  19 #include "common/ieee802_11_defs.h"
  20 #include "radius/radius_client.h"
  21 #include "drivers/driver.h"
  22 #include "hostapd.h"
  23 #include "authsrv.h"
  24 #include "sta_info.h"
  25 #include "accounting.h"
  26 #include "ap_list.h"
  27 #include "beacon.h"
  28 #include "iapp.h"
  29 #include "ieee802_1x.h"
  30 #include "ieee802_11_auth.h"
  31 #include "vlan_init.h"
  32 #include "wpa_auth.h"
  33 #include "wps_hostapd.h"
  34 #include "hw_features.h"
  35 #include "wpa_auth_glue.h"
  36 #include "ap_drv_ops.h"
  37 #include "ap_config.h"
  38
  39
  40 static int hostapd_flush_old_stations(struct hostapd_data *hapd);
  41 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd);
  42
  43 extern int wpa_debug_level;
  44
  45
  46 int hostapd_reload_config(struct hostapd_iface *iface)
  47 {
  48         struct hostapd_data *hapd = iface->bss[0];
  49         struct hostapd_config *newconf, *oldconf;
  50         size_t j;
  51
  52         if (iface->config_read_cb == NULL)
  53                 return -1;
  54         newconf = iface->config_read_cb(iface->config_fname);
  55         if (newconf == NULL)
  56                 return -1;
  57
  58         /*
  59          * Deauthenticate all stations since the new configuration may not
  60          * allow them to use the BSS anymore.
  61          */
  62         for (j = 0; j < iface->num_bss; j++)
  63                 hostapd_flush_old_stations(iface->bss[j]);
  64
  65 #ifndef CONFIG_NO_RADIUS
  66         /* TODO: update dynamic data based on changed configuration
  67          * items (e.g., open/close sockets, etc.) */
  68         radius_client_flush(hapd->radius, 0);
  69 #endif /* CONFIG_NO_RADIUS */
  70
  71         oldconf = hapd->iconf;
  72         hapd->iconf = newconf;
  73         hapd->conf = &newconf->bss[0];
  74         iface->conf = newconf;
  75
  76         if (hostapd_setup_wpa_psk(hapd->conf)) {
  77                 wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK "
  78                            "after reloading configuration");
  79         }
  80
  81         if (hapd->conf->ieee802_1x || hapd->conf->wpa)
  82                 hapd->drv.set_drv_ieee8021x(hapd, hapd->conf->iface, 1);
  83         else
  84                 hapd->drv.set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
  85
  86         if (hapd->conf->wpa && hapd->wpa_auth == NULL)
  87                 hostapd_setup_wpa(hapd);
  88         else if (hapd->conf->wpa) {
  89                 const u8 *wpa_ie;
  90                 size_t wpa_ie_len;
  91                 hostapd_reconfig_wpa(hapd);
  92                 wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len);
  93                 if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len))
  94                         wpa_printf(MSG_ERROR, "Failed to configure WPA IE for "
  95                                    "the kernel driver.");
  96         } else if (hapd->wpa_auth) {
  97                 wpa_deinit(hapd->wpa_auth);
  98                 hapd->wpa_auth = NULL;
  99                 hostapd_set_privacy(hapd, 0);
 100                 hostapd_setup_encryption(hapd->conf->iface, hapd);
 101                 hostapd_set_generic_elem(hapd, (u8 *) "", 0);
 102         }
 103
 104         ieee802_11_set_beacon(hapd);
 105         hostapd_update_wps(hapd);
 106
 107         if (hapd->conf->ssid.ssid_set &&
 108             hostapd_set_ssid(hapd, (u8 *) hapd->conf->ssid.ssid,
 109                              hapd->conf->ssid.ssid_len)) {
 110                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 111                 /* try to continue */
 112         }
 113
 114         hostapd_config_free(oldconf);
 115
 116         wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface);
 117
 118         return 0;
 119 }
 120
 121
 122 static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd,
 123                                               char *ifname)
 124 {
 125         int i;
 126
 127         for (i = 0; i < NUM_WEP_KEYS; i++) {
 128                 if (hapd->drv.set_key(ifname, hapd, WPA_ALG_NONE, NULL, i,
 129                                       i == 0 ? 1 : 0, NULL, 0, NULL, 0)) {
 130                         wpa_printf(MSG_DEBUG, "Failed to clear default "
 131                                    "encryption keys (ifname=%s keyidx=%d)",
 132                                    ifname, i);
 133                 }
 134         }
 135 #ifdef CONFIG_IEEE80211W
 136         if (hapd->conf->ieee80211w) {
 137                 for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) {
 138                         if (hapd->drv.set_key(ifname, hapd, WPA_ALG_NONE, NULL,
 139                                               i, i == 0 ? 1 : 0, NULL, 0,
 140                                               NULL, 0)) {
 141                                 wpa_printf(MSG_DEBUG, "Failed to clear "
 142                                            "default mgmt encryption keys "
 143                                            "(ifname=%s keyidx=%d)", ifname, i);
 144                         }
 145                 }
 146         }
 147 #endif /* CONFIG_IEEE80211W */
 148 }
 149
 150
 151 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd)
 152 {
 153         hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface);
 154         return 0;
 155 }
 156
 157
 158 static int hostapd_broadcast_wep_set(struct hostapd_data *hapd)
 159 {
 160         int errors = 0, idx;
 161         struct hostapd_ssid *ssid = &hapd->conf->ssid;
 162
 163         idx = ssid->wep.idx;
 164         if (ssid->wep.default_len &&
 165             hapd->drv.set_key(hapd->conf->iface,
 166                               hapd, WPA_ALG_WEP, NULL, idx,
 167                               idx == ssid->wep.idx,
 168                               NULL, 0, ssid->wep.key[idx],
 169                               ssid->wep.len[idx])) {
 170                 wpa_printf(MSG_WARNING, "Could not set WEP encryption.");
 171                 errors++;
 172         }
 173
 174         if (ssid->dyn_vlan_keys) {
 175                 size_t i;
 176                 for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) {
 177                         const char *ifname;
 178                         struct hostapd_wep_keys *key = ssid->dyn_vlan_keys[i];
 179                         if (key == NULL)
 180                                 continue;
 181                         ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan,
 182                                                             i);
 183                         if (ifname == NULL)
 184                                 continue;
 185
 186                         idx = key->idx;
 187                         if (hapd->drv.set_key(ifname, hapd, WPA_ALG_WEP, NULL,
 188                                               idx, idx == key->idx, NULL, 0,
 189                                               key->key[idx], key->len[idx])) {
 190                                 wpa_printf(MSG_WARNING, "Could not set "
 191                                            "dynamic VLAN WEP encryption.");
 192                                 errors++;
 193                         }
 194                 }
 195         }
 196
 197         return errors;
 198 }
 199
 200 /**
 201  * hostapd_cleanup - Per-BSS cleanup (deinitialization)
 202  * @hapd: Pointer to BSS data
 203  *
 204  * This function is used to free all per-BSS data structures and resources.
 205  * This gets called in a loop for each BSS between calls to
 206  * hostapd_cleanup_iface_pre() and hostapd_cleanup_iface() when an interface
 207  * is deinitialized. Most of the modules that are initialized in
 208  * hostapd_setup_bss() are deinitialized here.
 209  */
 210 static void hostapd_cleanup(struct hostapd_data *hapd)
 211 {
 212         if (hapd->iface->ctrl_iface_deinit)
 213                 hapd->iface->ctrl_iface_deinit(hapd);
 214
 215         iapp_deinit(hapd->iapp);
 216         hapd->iapp = NULL;
 217         accounting_deinit(hapd);
 218         hostapd_deinit_wpa(hapd);
 219         vlan_deinit(hapd);
 220         hostapd_acl_deinit(hapd);
 221 #ifndef CONFIG_NO_RADIUS
 222         radius_client_deinit(hapd->radius);
 223         hapd->radius = NULL;
 224 #endif /* CONFIG_NO_RADIUS */
 225
 226         hostapd_deinit_wps(hapd);
 227
 228         authsrv_deinit(hapd);
 229
 230         if (hapd->interface_added &&
 231             hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
 232                 wpa_printf(MSG_WARNING, "Failed to remove BSS interface %s",
 233                            hapd->conf->iface);
 234         }
 235
 236         os_free(hapd->probereq_cb);
 237         hapd->probereq_cb = NULL;
 238
 239 #ifdef CONFIG_P2P
 240         wpabuf_free(hapd->p2p_beacon_ie);
 241         hapd->p2p_beacon_ie = NULL;
 242         wpabuf_free(hapd->p2p_probe_resp_ie);
 243         hapd->p2p_probe_resp_ie = NULL;
 244 #endif /* CONFIG_P2P */
 245 }
 246
 247
 248 /**
 249  * hostapd_cleanup_iface_pre - Preliminary per-interface cleanup
 250  * @iface: Pointer to interface data
 251  *
 252  * This function is called before per-BSS data structures are deinitialized
 253  * with hostapd_cleanup().
 254  */
 255 static void hostapd_cleanup_iface_pre(struct hostapd_iface *iface)
 256 {
 257 }
 258
 259
 260 /**
 261  * hostapd_cleanup_iface - Complete per-interface cleanup
 262  * @iface: Pointer to interface data
 263  *
 264  * This function is called after per-BSS data structures are deinitialized
 265  * with hostapd_cleanup().
 266  */
 267 static void hostapd_cleanup_iface(struct hostapd_iface *iface)
 268 {
 269         hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
 270         iface->hw_features = NULL;
 271         os_free(iface->current_rates);
 272         iface->current_rates = NULL;
 273         ap_list_deinit(iface);
 274         hostapd_config_free(iface->conf);
 275         iface->conf = NULL;
 276
 277         os_free(iface->config_fname);
 278         os_free(iface->bss);
 279         os_free(iface);
 280 }
 281
 282
 283 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
 284 {
 285         int i;
 286
 287         hostapd_broadcast_wep_set(hapd);
 288
 289         if (hapd->conf->ssid.wep.default_len) {
 290                 hostapd_set_privacy(hapd, 1);
 291                 return 0;
 292         }
 293
 294         for (i = 0; i < 4; i++) {
 295                 if (hapd->conf->ssid.wep.key[i] &&
 296                     hapd->drv.set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
 297                                       i == hapd->conf->ssid.wep.idx, NULL, 0,
 298                                       hapd->conf->ssid.wep.key[i],
 299                                       hapd->conf->ssid.wep.len[i])) {
 300                         wpa_printf(MSG_WARNING, "Could not set WEP "
 301                                    "encryption.");
 302                         return -1;
 303                 }
 304                 if (hapd->conf->ssid.wep.key[i] &&
 305                     i == hapd->conf->ssid.wep.idx)
 306                         hostapd_set_privacy(hapd, 1);
 307         }
 308
 309         return 0;
 310 }
 311
 312
 313 static int hostapd_flush_old_stations(struct hostapd_data *hapd)
 314 {
 315         int ret = 0;
 316
 317         if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL)
 318                 return 0;
 319
 320         wpa_printf(MSG_DEBUG, "Flushing old station entries");
 321         if (hostapd_flush(hapd)) {
 322                 wpa_printf(MSG_WARNING, "Could not connect to kernel driver.");
 323                 ret = -1;
 324         }
 325         wpa_printf(MSG_DEBUG, "Deauthenticate all stations");
 326
 327         /* New Prism2.5/3 STA firmware versions seem to have issues with this
 328          * broadcast deauth frame. This gets the firmware in odd state where
 329          * nothing works correctly, so let's skip sending this for the hostap
 330          * driver. */
 331         if (hapd->driver && os_strcmp(hapd->driver->name, "hostap") != 0) {
 332                 u8 addr[ETH_ALEN];
 333                 os_memset(addr, 0xff, ETH_ALEN);
 334                 hapd->drv.sta_deauth(hapd, addr,
 335                                      WLAN_REASON_PREV_AUTH_NOT_VALID);
 336         }
 337
 338         return ret;
 339 }
 340
 341
 342 /**
 343  * hostapd_validate_bssid_configuration - Validate BSSID configuration
 344  * @iface: Pointer to interface data
 345  * Returns: 0 on success, -1 on failure
 346  *
 347  * This function is used to validate that the configured BSSIDs are valid.
 348  */
 349 static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
 350 {
 351         u8 mask[ETH_ALEN] = { 0 };
 352         struct hostapd_data *hapd = iface->bss[0];
 353         unsigned int i = iface->conf->num_bss, bits = 0, j;
 354         int res;
 355         int auto_addr = 0;
 356
 357         if (hostapd_drv_none(hapd))
 358                 return 0;
 359
 360         /* Generate BSSID mask that is large enough to cover the BSSIDs. */
 361
 362         /* Determine the bits necessary to cover the number of BSSIDs. */
 363         for (i--; i; i >>= 1)
 364                 bits++;
 365
 366         /* Determine the bits necessary to any configured BSSIDs,
 367            if they are higher than the number of BSSIDs. */
 368         for (j = 0; j < iface->conf->num_bss; j++) {
 369                 if (hostapd_mac_comp_empty(iface->conf->bss[j].bssid) == 0) {
 370                         if (j)
 371                                 auto_addr++;
 372                         continue;
 373                 }
 374
 375                 for (i = 0; i < ETH_ALEN; i++) {
 376                         mask[i] |=
 377                                 iface->conf->bss[j].bssid[i] ^
 378                                 hapd->own_addr[i];
 379                 }
 380         }
 381
 382         if (!auto_addr)
 383                 goto skip_mask_ext;
 384
 385         for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
 386                 ;
 387         j = 0;
 388         if (i < ETH_ALEN) {
 389                 j = (5 - i) * 8;
 390
 391                 while (mask[i] != 0) {
 392                         mask[i] >>= 1;
 393                         j++;
 394                 }
 395         }
 396
 397         if (bits < j)
 398                 bits = j;
 399
 400         if (bits > 40) {
 401                 wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
 402                            bits);
 403                 return -1;
 404         }
 405
 406         os_memset(mask, 0xff, ETH_ALEN);
 407         j = bits / 8;
 408         for (i = 5; i > 5 - j; i--)
 409                 mask[i] = 0;
 410         j = bits % 8;
 411         while (j--)
 412                 mask[i] <<= 1;
 413
 414 skip_mask_ext:
 415         wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
 416                    (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
 417
 418         res = hostapd_valid_bss_mask(hapd, hapd->own_addr, mask);
 419         if (res == 0)
 420                 return 0;
 421
 422         if (res < 0) {
 423                 wpa_printf(MSG_ERROR, "Driver did not accept BSSID mask "
 424                            MACSTR " for start address " MACSTR ".",
 425                            MAC2STR(mask), MAC2STR(hapd->own_addr));
 426                 return -1;
 427         }
 428
 429         if (!auto_addr)
 430                 return 0;
 431
 432         for (i = 0; i < ETH_ALEN; i++) {
 433                 if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
 434                         wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
 435                                    " for start address " MACSTR ".",
 436                                    MAC2STR(mask), MAC2STR(hapd->own_addr));
 437                         wpa_printf(MSG_ERROR, "Start address must be the "
 438                                    "first address in the block (i.e., addr "
 439                                    "AND mask == addr).");
 440                         return -1;
 441                 }
 442         }
 443
 444         return 0;
 445 }
 446
 447
 448 static int mac_in_conf(struct hostapd_config *conf, const void *a)
 449 {
 450         size_t i;
 451
 452         for (i = 0; i < conf->num_bss; i++) {
 453                 if (hostapd_mac_comp(conf->bss[i].bssid, a) == 0) {
 454                         return 1;
 455                 }
 456         }
 457
 458         return 0;
 459 }
 460
 461
 462
 463
 464 /**
 465  * hostapd_setup_bss - Per-BSS setup (initialization)
 466  * @hapd: Pointer to BSS data
 467  * @first: Whether this BSS is the first BSS of an interface
 468  *
 469  * This function is used to initialize all per-BSS data structures and
 470  * resources. This gets called in a loop for each BSS when an interface is
 471  * initialized. Most of the modules that are initialized here will be
 472  * deinitialized in hostapd_cleanup().
 473  */
 474 static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
 475 {
 476         struct hostapd_bss_config *conf = hapd->conf;
 477         u8 ssid[HOSTAPD_MAX_SSID_LEN + 1];
 478         int ssid_len, set_ssid;
 479         char force_ifname[IFNAMSIZ];
 480         u8 if_addr[ETH_ALEN];
 481
 482         if (!first) {
 483                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0) {
 484                         /* Allocate the next available BSSID. */
 485                         do {
 486                                 inc_byte_array(hapd->own_addr, ETH_ALEN);
 487                         } while (mac_in_conf(hapd->iconf, hapd->own_addr));
 488                 } else {
 489                         /* Allocate the configured BSSID. */
 490                         os_memcpy(hapd->own_addr, hapd->conf->bssid, ETH_ALEN);
 491
 492                         if (hostapd_mac_comp(hapd->own_addr,
 493                                              hapd->iface->bss[0]->own_addr) ==
 494                             0) {
 495                                 wpa_printf(MSG_ERROR, "BSS '%s' may not have "
 496                                            "BSSID set to the MAC address of "
 497                                            "the radio", hapd->conf->iface);
 498                                 return -1;
 499                         }
 500                 }
 501
 502                 hapd->interface_added = 1;
 503                 if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
 504                                    hapd->conf->iface, hapd->own_addr, hapd,
 505                                    &hapd->drv_priv, force_ifname, if_addr)) {
 506                         wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
 507                                    MACSTR ")", MAC2STR(hapd->own_addr));
 508                         return -1;
 509                 }
 510         }
 511
 512         hostapd_flush_old_stations(hapd);
 513         hostapd_set_privacy(hapd, 0);
 514
 515         hostapd_broadcast_wep_clear(hapd);
 516         if (hostapd_setup_encryption(hapd->conf->iface, hapd))
 517                 return -1;
 518
 519         /*
 520          * Fetch the SSID from the system and use it or,
 521          * if one was specified in the config file, verify they
 522          * match.
 523          */
 524         ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
 525         if (ssid_len < 0) {
 526                 wpa_printf(MSG_ERROR, "Could not read SSID from system");
 527                 return -1;
 528         }
 529         if (conf->ssid.ssid_set) {
 530                 /*
 531                  * If SSID is specified in the config file and it differs
 532                  * from what is being used then force installation of the
 533                  * new SSID.
 534                  */
 535                 set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
 536                             os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
 537         } else {
 538                 /*
 539                  * No SSID in the config file; just use the one we got
 540                  * from the system.
 541                  */
 542                 set_ssid = 0;
 543                 conf->ssid.ssid_len = ssid_len;
 544                 os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
 545                 conf->ssid.ssid[conf->ssid.ssid_len] = '\0';
 546         }
 547
 548         if (!hostapd_drv_none(hapd)) {
 549                 wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
 550                            " and ssid '%s'",
 551                            hapd->conf->iface, MAC2STR(hapd->own_addr),
 552                            hapd->conf->ssid.ssid);
 553         }
 554
 555         if (hostapd_setup_wpa_psk(conf)) {
 556                 wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
 557                 return -1;
 558         }
 559
 560         /* Set SSID for the kernel driver (to be used in beacon and probe
 561          * response frames) */
 562         if (set_ssid && hostapd_set_ssid(hapd, (u8 *) conf->ssid.ssid,
 563                                          conf->ssid.ssid_len)) {
 564                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 565                 return -1;
 566         }
 567
 568         if (wpa_debug_level == MSG_MSGDUMP)
 569                 conf->radius->msg_dumps = 1;
 570 #ifndef CONFIG_NO_RADIUS
 571         hapd->radius = radius_client_init(hapd, conf->radius);
 572         if (hapd->radius == NULL) {
 573                 wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
 574                 return -1;
 575         }
 576 #endif /* CONFIG_NO_RADIUS */
 577
 578         if (hostapd_acl_init(hapd)) {
 579                 wpa_printf(MSG_ERROR, "ACL initialization failed.");
 580                 return -1;
 581         }
 582         if (hostapd_init_wps(hapd, conf))
 583                 return -1;
 584
 585         if (authsrv_init(hapd) < 0)
 586                 return -1;
 587
 588         if (ieee802_1x_init(hapd)) {
 589                 wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
 590                 return -1;
 591         }
 592
 593         if (hapd->conf->wpa && hostapd_setup_wpa(hapd))
 594                 return -1;
 595
 596         if (accounting_init(hapd)) {
 597                 wpa_printf(MSG_ERROR, "Accounting initialization failed.");
 598                 return -1;
 599         }
 600
 601         if (hapd->conf->ieee802_11f &&
 602             (hapd->iapp = iapp_init(hapd, hapd->conf->iapp_iface)) == NULL) {
 603                 wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
 604                            "failed.");
 605                 return -1;
 606         }
 607
 608         if (hapd->iface->ctrl_iface_init &&
 609             hapd->iface->ctrl_iface_init(hapd)) {
 610                 wpa_printf(MSG_ERROR, "Failed to setup control interface");
 611                 return -1;
 612         }
 613
 614         if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
 615                 wpa_printf(MSG_ERROR, "VLAN initialization failed.");
 616                 return -1;
 617         }
 618
 619         ieee802_11_set_beacon(hapd);
 620
 621         return 0;
 622 }
 623
 624
 625 static void hostapd_tx_queue_params(struct hostapd_iface *iface)
 626 {
 627         struct hostapd_data *hapd = iface->bss[0];
 628         int i;
 629         struct hostapd_tx_queue_params *p;
 630
 631         for (i = 0; i < NUM_TX_QUEUES; i++) {
 632                 p = &iface->conf->tx_queue[i];
 633
 634                 if (!p->configured)
 635                         continue;
 636
 637                 if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
 638                                                 p->cwmax, p->burst)) {
 639                         wpa_printf(MSG_DEBUG, "Failed to set TX queue "
 640                                    "parameters for queue %d.", i);
 641                         /* Continue anyway */
 642                 }
 643         }
 644 }
 645
 646
 647 static int setup_interface(struct hostapd_iface *iface)
 648 {
 649         struct hostapd_data *hapd = iface->bss[0];
 650         size_t i;
 651         char country[4];
 652
 653         /*
 654          * Make sure that all BSSes get configured with a pointer to the same
 655          * driver interface.
 656          */
 657         for (i = 1; i < iface->num_bss; i++) {
 658                 iface->bss[i]->driver = hapd->driver;
 659                 iface->bss[i]->drv_priv = hapd->drv_priv;
 660         }
 661
 662         if (hostapd_validate_bssid_configuration(iface))
 663                 return -1;
 664
 665         if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
 666                 os_memcpy(country, hapd->iconf->country, 3);
 667                 country[3] = '\0';
 668                 if (hostapd_set_country(hapd, country) < 0) {
 669                         wpa_printf(MSG_ERROR, "Failed to set country code");
 670                         return -1;
 671                 }
 672         }
 673
 674         if (hostapd_get_hw_features(iface)) {
 675                 /* Not all drivers support this yet, so continue without hw
 676                  * feature data. */
 677         } else {
 678                 int ret = hostapd_select_hw_mode(iface);
 679                 if (ret < 0) {
 680                         wpa_printf(MSG_ERROR, "Could not select hw_mode and "
 681                                    "channel. (%d)", ret);
 682                         return -1;
 683                 }
 684                 ret = hostapd_check_ht_capab(iface);
 685                 if (ret < 0)
 686                         return -1;
 687                 if (ret == 1) {
 688                         wpa_printf(MSG_DEBUG, "Interface initialization will "
 689                                    "be completed in a callback");
 690                         return 0;
 691                 }
 692         }
 693         return hostapd_setup_interface_complete(iface, 0);
 694 }
 695
 696
 697 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
 698 {
 699         struct hostapd_data *hapd = iface->bss[0];
 700         size_t j;
 701         u8 *prev_addr;
 702
 703         if (err) {
 704                 wpa_printf(MSG_ERROR, "Interface initialization failed");
 705                 eloop_terminate();
 706                 return -1;
 707         }
 708
 709         wpa_printf(MSG_DEBUG, "Completing interface initialization");
 710         if (hapd->iconf->channel) {
 711                 iface->freq = hostapd_hw_get_freq(hapd, hapd->iconf->channel);
 712                 wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
 713                            "Frequency: %d MHz",
 714                            hostapd_hw_mode_txt(hapd->iconf->hw_mode),
 715                            hapd->iconf->channel, iface->freq);
 716
 717                 if (hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
 718                                      hapd->iconf->channel,
 719                                      hapd->iconf->ieee80211n,
 720                                      hapd->iconf->secondary_channel)) {
 721                         wpa_printf(MSG_ERROR, "Could not set channel for "
 722                                    "kernel driver");
 723                         return -1;
 724                 }
 725         }
 726
 727         if (hapd->iconf->rts_threshold > -1 &&
 728             hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
 729                 wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
 730                            "kernel driver");
 731                 return -1;
 732         }
 733
 734         if (hapd->iconf->fragm_threshold > -1 &&
 735             hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
 736                 wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
 737                            "for kernel driver");
 738                 return -1;
 739         }
 740
 741         prev_addr = hapd->own_addr;
 742
 743         for (j = 0; j < iface->num_bss; j++) {
 744                 hapd = iface->bss[j];
 745                 if (j)
 746                         os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
 747                 if (hostapd_setup_bss(hapd, j == 0))
 748                         return -1;
 749                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
 750                         prev_addr = hapd->own_addr;
 751         }
 752
 753         hostapd_tx_queue_params(iface);
 754
 755         ap_list_init(iface);
 756
 757         if (hostapd_driver_commit(hapd) < 0) {
 758                 wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
 759                            "configuration", __func__);
 760                 return -1;
 761         }
 762
 763         wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
 764                    iface->bss[0]->conf->iface);
 765
 766         return 0;
 767 }
 768
 769
 770 /**
 771  * hostapd_setup_interface - Setup of an interface
 772  * @iface: Pointer to interface data.
 773  * Returns: 0 on success, -1 on failure
 774  *
 775  * Initializes the driver interface, validates the configuration,
 776  * and sets driver parameters based on the configuration.
 777  * Flushes old stations, sets the channel, encryption,
 778  * beacons, and WDS links based on the configuration.
 779  */
 780 int hostapd_setup_interface(struct hostapd_iface *iface)
 781 {
 782         int ret;
 783
 784         ret = setup_interface(iface);
 785         if (ret) {
 786                 wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
 787                            iface->bss[0]->conf->iface);
 788                 return -1;
 789         }
 790
 791         return 0;
 792 }
 793
 794
 795 /**
 796  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
 797  * @hapd_iface: Pointer to interface data
 798  * @conf: Pointer to per-interface configuration
 799  * @bss: Pointer to per-BSS configuration for this BSS
 800  * Returns: Pointer to allocated BSS data
 801  *
 802  * This function is used to allocate per-BSS data structure. This data will be
 803  * freed after hostapd_cleanup() is called for it during interface
 804  * deinitialization.
 805  */
 806 struct hostapd_data *
 807 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
 808                        struct hostapd_config *conf,
 809                        struct hostapd_bss_config *bss)
 810 {
 811         struct hostapd_data *hapd;
 812
 813         hapd = os_zalloc(sizeof(*hapd));
 814         if (hapd == NULL)
 815                 return NULL;
 816
 817         hostapd_set_driver_ops(&hapd->drv);
 818         hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
 819         hapd->iconf = conf;
 820         hapd->conf = bss;
 821         hapd->iface = hapd_iface;
 822         hapd->driver = hapd->iconf->driver;
 823
 824         return hapd;
 825 }
 826
 827
 828 void hostapd_interface_deinit(struct hostapd_iface *iface)
 829 {
 830         size_t j;
 831
 832         if (iface == NULL)
 833                 return;
 834
 835         hostapd_cleanup_iface_pre(iface);
 836         for (j = 0; j < iface->num_bss; j++) {
 837                 struct hostapd_data *hapd = iface->bss[j];
 838                 hostapd_free_stas(hapd);
 839                 hostapd_flush_old_stations(hapd);
 840                 hostapd_cleanup(hapd);
 841         }
 842 }
 843
 844
 845 void hostapd_interface_free(struct hostapd_iface *iface)
 846 {
 847         size_t j;
 848         for (j = 0; j < iface->num_bss; j++)
 849                 os_free(iface->bss[j]);
 850         hostapd_cleanup_iface(iface);
 851 }
 852
 853
 854 /**
 855  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
 856  * @hapd: Pointer to BSS data
 857  * @sta: Pointer to the associated STA data
 858  * @reassoc: 1 to indicate this was a re-association; 0 = first association
 859  *
 860  * This function will be called whenever a station associates with the AP. It
 861  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
 862  * from drv_callbacks.c based on driver events for drivers that take care of
 863  * management frames (IEEE 802.11 authentication and association) internally.
 864  */
 865 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
 866                            int reassoc)
 867 {
 868         if (hapd->tkip_countermeasures) {
 869                 hapd->drv.sta_deauth(hapd, sta->addr,
 870                                      WLAN_REASON_MICHAEL_MIC_FAILURE);
 871                 return;
 872         }
 873
 874         hostapd_prune_associations(hapd, sta->addr);
 875
 876         /* IEEE 802.11F (IAPP) */
 877         if (hapd->conf->ieee802_11f)
 878                 iapp_new_station(hapd->iapp, sta);
 879
 880         /* Start accounting here, if IEEE 802.1X and WPA are not used.
 881          * IEEE 802.1X/WPA code will start accounting after the station has
 882          * been authorized. */
 883         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa)
 884                 accounting_sta_start(hapd, sta);
 885
 886         /* Start IEEE 802.1X authentication process for new stations */
 887         ieee802_1x_new_station(hapd, sta);
 888         if (reassoc) {
 889                 if (sta->auth_alg != WLAN_AUTH_FT &&
 890                     !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
 891                         wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
 892         } else
 893                 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
 894 }