src/ap/hostapd.c

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