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