contrib/wpa/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
 240
 241 /**
 242  * hostapd_cleanup_iface_pre - Preliminary per-interface cleanup
 243  * @iface: Pointer to interface data
 244  *
 245  * This function is called before per-BSS data structures are deinitialized
 246  * with hostapd_cleanup().
 247  */
 248 static void hostapd_cleanup_iface_pre(struct hostapd_iface *iface)
 249 {
 250 }
 251
 252
 253 /**
 254  * hostapd_cleanup_iface - Complete per-interface cleanup
 255  * @iface: Pointer to interface data
 256  *
 257  * This function is called after per-BSS data structures are deinitialized
 258  * with hostapd_cleanup().
 259  */
 260 static void hostapd_cleanup_iface(struct hostapd_iface *iface)
 261 {
 262         hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
 263         iface->hw_features = NULL;
 264         os_free(iface->current_rates);
 265         iface->current_rates = NULL;
 266         ap_list_deinit(iface);
 267         hostapd_config_free(iface->conf);
 268         iface->conf = NULL;
 269
 270         os_free(iface->config_fname);
 271         os_free(iface->bss);
 272         os_free(iface);
 273 }
 274
 275
 276 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
 277 {
 278         int i;
 279
 280         hostapd_broadcast_wep_set(hapd);
 281
 282         if (hapd->conf->ssid.wep.default_len) {
 283                 hostapd_set_privacy(hapd, 1);
 284                 return 0;
 285         }
 286
 287         for (i = 0; i < 4; i++) {
 288                 if (hapd->conf->ssid.wep.key[i] &&
 289                     hapd->drv.set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
 290                                       i == hapd->conf->ssid.wep.idx, NULL, 0,
 291                                       hapd->conf->ssid.wep.key[i],
 292                                       hapd->conf->ssid.wep.len[i])) {
 293                         wpa_printf(MSG_WARNING, "Could not set WEP "
 294                                    "encryption.");
 295                         return -1;
 296                 }
 297                 if (hapd->conf->ssid.wep.key[i] &&
 298                     i == hapd->conf->ssid.wep.idx)
 299                         hostapd_set_privacy(hapd, 1);
 300         }
 301
 302         return 0;
 303 }
 304
 305
 306 static int hostapd_flush_old_stations(struct hostapd_data *hapd)
 307 {
 308         int ret = 0;
 309
 310         if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL)
 311                 return 0;
 312
 313         wpa_printf(MSG_DEBUG, "Flushing old station entries");
 314         if (hostapd_flush(hapd)) {
 315                 wpa_printf(MSG_WARNING, "Could not connect to kernel driver.");
 316                 ret = -1;
 317         }
 318         wpa_printf(MSG_DEBUG, "Deauthenticate all stations");
 319
 320         /* New Prism2.5/3 STA firmware versions seem to have issues with this
 321          * broadcast deauth frame. This gets the firmware in odd state where
 322          * nothing works correctly, so let's skip sending this for the hostap
 323          * driver. */
 324         if (hapd->driver && os_strcmp(hapd->driver->name, "hostap") != 0) {
 325                 u8 addr[ETH_ALEN];
 326                 os_memset(addr, 0xff, ETH_ALEN);
 327                 hapd->drv.sta_deauth(hapd, addr,
 328                                      WLAN_REASON_PREV_AUTH_NOT_VALID);
 329         }
 330
 331         return ret;
 332 }
 333
 334
 335 /**
 336  * hostapd_validate_bssid_configuration - Validate BSSID configuration
 337  * @iface: Pointer to interface data
 338  * Returns: 0 on success, -1 on failure
 339  *
 340  * This function is used to validate that the configured BSSIDs are valid.
 341  */
 342 static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
 343 {
 344         u8 mask[ETH_ALEN] = { 0 };
 345         struct hostapd_data *hapd = iface->bss[0];
 346         unsigned int i = iface->conf->num_bss, bits = 0, j;
 347         int res;
 348         int auto_addr = 0;
 349
 350         if (hostapd_drv_none(hapd))
 351                 return 0;
 352
 353         /* Generate BSSID mask that is large enough to cover the BSSIDs. */
 354
 355         /* Determine the bits necessary to cover the number of BSSIDs. */
 356         for (i--; i; i >>= 1)
 357                 bits++;
 358
 359         /* Determine the bits necessary to any configured BSSIDs,
 360            if they are higher than the number of BSSIDs. */
 361         for (j = 0; j < iface->conf->num_bss; j++) {
 362                 if (hostapd_mac_comp_empty(iface->conf->bss[j].bssid) == 0) {
 363                         if (j)
 364                                 auto_addr++;
 365                         continue;
 366                 }
 367
 368                 for (i = 0; i < ETH_ALEN; i++) {
 369                         mask[i] |=
 370                                 iface->conf->bss[j].bssid[i] ^
 371                                 hapd->own_addr[i];
 372                 }
 373         }
 374
 375         if (!auto_addr)
 376                 goto skip_mask_ext;
 377
 378         for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
 379                 ;
 380         j = 0;
 381         if (i < ETH_ALEN) {
 382                 j = (5 - i) * 8;
 383
 384                 while (mask[i] != 0) {
 385                         mask[i] >>= 1;
 386                         j++;
 387                 }
 388         }
 389
 390         if (bits < j)
 391                 bits = j;
 392
 393         if (bits > 40) {
 394                 wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
 395                            bits);
 396                 return -1;
 397         }
 398
 399         os_memset(mask, 0xff, ETH_ALEN);
 400         j = bits / 8;
 401         for (i = 5; i > 5 - j; i--)
 402                 mask[i] = 0;
 403         j = bits % 8;
 404         while (j--)
 405                 mask[i] <<= 1;
 406
 407 skip_mask_ext:
 408         wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
 409                    (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
 410
 411         res = hostapd_valid_bss_mask(hapd, hapd->own_addr, mask);
 412         if (res == 0)
 413                 return 0;
 414
 415         if (res < 0) {
 416                 wpa_printf(MSG_ERROR, "Driver did not accept BSSID mask "
 417                            MACSTR " for start address " MACSTR ".",
 418                            MAC2STR(mask), MAC2STR(hapd->own_addr));
 419                 return -1;
 420         }
 421
 422         if (!auto_addr)
 423                 return 0;
 424
 425         for (i = 0; i < ETH_ALEN; i++) {
 426                 if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
 427                         wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
 428                                    " for start address " MACSTR ".",
 429                                    MAC2STR(mask), MAC2STR(hapd->own_addr));
 430                         wpa_printf(MSG_ERROR, "Start address must be the "
 431                                    "first address in the block (i.e., addr "
 432                                    "AND mask == addr).");
 433                         return -1;
 434                 }
 435         }
 436
 437         return 0;
 438 }
 439
 440
 441 static int mac_in_conf(struct hostapd_config *conf, const void *a)
 442 {
 443         size_t i;
 444
 445         for (i = 0; i < conf->num_bss; i++) {
 446                 if (hostapd_mac_comp(conf->bss[i].bssid, a) == 0) {
 447                         return 1;
 448                 }
 449         }
 450
 451         return 0;
 452 }
 453
 454
 455
 456
 457 /**
 458  * hostapd_setup_bss - Per-BSS setup (initialization)
 459  * @hapd: Pointer to BSS data
 460  * @first: Whether this BSS is the first BSS of an interface
 461  *
 462  * This function is used to initialize all per-BSS data structures and
 463  * resources. This gets called in a loop for each BSS when an interface is
 464  * initialized. Most of the modules that are initialized here will be
 465  * deinitialized in hostapd_cleanup().
 466  */
 467 static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
 468 {
 469         struct hostapd_bss_config *conf = hapd->conf;
 470         u8 ssid[HOSTAPD_MAX_SSID_LEN + 1];
 471         int ssid_len, set_ssid;
 472         char force_ifname[IFNAMSIZ];
 473         u8 if_addr[ETH_ALEN];
 474
 475         if (!first) {
 476                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0) {
 477                         /* Allocate the next available BSSID. */
 478                         do {
 479                                 inc_byte_array(hapd->own_addr, ETH_ALEN);
 480                         } while (mac_in_conf(hapd->iconf, hapd->own_addr));
 481                 } else {
 482                         /* Allocate the configured BSSID. */
 483                         os_memcpy(hapd->own_addr, hapd->conf->bssid, ETH_ALEN);
 484
 485                         if (hostapd_mac_comp(hapd->own_addr,
 486                                              hapd->iface->bss[0]->own_addr) ==
 487                             0) {
 488                                 wpa_printf(MSG_ERROR, "BSS '%s' may not have "
 489                                            "BSSID set to the MAC address of "
 490                                            "the radio", hapd->conf->iface);
 491                                 return -1;
 492                         }
 493                 }
 494
 495                 hapd->interface_added = 1;
 496                 if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
 497                                    hapd->conf->iface, hapd->own_addr, hapd,
 498                                    &hapd->drv_priv, force_ifname, if_addr)) {
 499                         wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
 500                                    MACSTR ")", MAC2STR(hapd->own_addr));
 501                         return -1;
 502                 }
 503         }
 504
 505         hostapd_flush_old_stations(hapd);
 506         hostapd_set_privacy(hapd, 0);
 507
 508         hostapd_broadcast_wep_clear(hapd);
 509         if (hostapd_setup_encryption(hapd->conf->iface, hapd))
 510                 return -1;
 511
 512         /*
 513          * Fetch the SSID from the system and use it or,
 514          * if one was specified in the config file, verify they
 515          * match.
 516          */
 517         ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
 518         if (ssid_len < 0) {
 519                 wpa_printf(MSG_ERROR, "Could not read SSID from system");
 520                 return -1;
 521         }
 522         if (conf->ssid.ssid_set) {
 523                 /*
 524                  * If SSID is specified in the config file and it differs
 525                  * from what is being used then force installation of the
 526                  * new SSID.
 527                  */
 528                 set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
 529                             os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
 530         } else {
 531                 /*
 532                  * No SSID in the config file; just use the one we got
 533                  * from the system.
 534                  */
 535                 set_ssid = 0;
 536                 conf->ssid.ssid_len = ssid_len;
 537                 os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
 538                 conf->ssid.ssid[conf->ssid.ssid_len] = '\0';
 539         }
 540
 541         if (!hostapd_drv_none(hapd)) {
 542                 wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
 543                            " and ssid '%s'",
 544                            hapd->conf->iface, MAC2STR(hapd->own_addr),
 545                            hapd->conf->ssid.ssid);
 546         }
 547
 548         if (hostapd_setup_wpa_psk(conf)) {
 549                 wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
 550                 return -1;
 551         }
 552
 553         /* Set SSID for the kernel driver (to be used in beacon and probe
 554          * response frames) */
 555         if (set_ssid && hostapd_set_ssid(hapd, (u8 *) conf->ssid.ssid,
 556                                          conf->ssid.ssid_len)) {
 557                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 558                 return -1;
 559         }
 560
 561         if (wpa_debug_level == MSG_MSGDUMP)
 562                 conf->radius->msg_dumps = 1;
 563 #ifndef CONFIG_NO_RADIUS
 564         hapd->radius = radius_client_init(hapd, conf->radius);
 565         if (hapd->radius == NULL) {
 566                 wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
 567                 return -1;
 568         }
 569 #endif /* CONFIG_NO_RADIUS */
 570
 571         if (hostapd_acl_init(hapd)) {
 572                 wpa_printf(MSG_ERROR, "ACL initialization failed.");
 573                 return -1;
 574         }
 575         if (hostapd_init_wps(hapd, conf))
 576                 return -1;
 577
 578         if (authsrv_init(hapd) < 0)
 579                 return -1;
 580
 581         if (ieee802_1x_init(hapd)) {
 582                 wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
 583                 return -1;
 584         }
 585
 586         if (hapd->conf->wpa && hostapd_setup_wpa(hapd))
 587                 return -1;
 588
 589         if (accounting_init(hapd)) {
 590                 wpa_printf(MSG_ERROR, "Accounting initialization failed.");
 591                 return -1;
 592         }
 593
 594         if (hapd->conf->ieee802_11f &&
 595             (hapd->iapp = iapp_init(hapd, hapd->conf->iapp_iface)) == NULL) {
 596                 wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
 597                            "failed.");
 598                 return -1;
 599         }
 600
 601         if (hapd->iface->ctrl_iface_init &&
 602             hapd->iface->ctrl_iface_init(hapd)) {
 603                 wpa_printf(MSG_ERROR, "Failed to setup control interface");
 604                 return -1;
 605         }
 606
 607         if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
 608                 wpa_printf(MSG_ERROR, "VLAN initialization failed.");
 609                 return -1;
 610         }
 611
 612         ieee802_11_set_beacon(hapd);
 613
 614         return 0;
 615 }
 616
 617
 618 static void hostapd_tx_queue_params(struct hostapd_iface *iface)
 619 {
 620         struct hostapd_data *hapd = iface->bss[0];
 621         int i;
 622         struct hostapd_tx_queue_params *p;
 623
 624         for (i = 0; i < NUM_TX_QUEUES; i++) {
 625                 p = &iface->conf->tx_queue[i];
 626
 627                 if (!p->configured)
 628                         continue;
 629
 630                 if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
 631                                                 p->cwmax, p->burst)) {
 632                         wpa_printf(MSG_DEBUG, "Failed to set TX queue "
 633                                    "parameters for queue %d.", i);
 634                         /* Continue anyway */
 635                 }
 636         }
 637 }
 638
 639
 640 static int setup_interface(struct hostapd_iface *iface)
 641 {
 642         struct hostapd_data *hapd = iface->bss[0];
 643         size_t i;
 644         char country[4];
 645
 646         /*
 647          * Make sure that all BSSes get configured with a pointer to the same
 648          * driver interface.
 649          */
 650         for (i = 1; i < iface->num_bss; i++) {
 651                 iface->bss[i]->driver = hapd->driver;
 652                 iface->bss[i]->drv_priv = hapd->drv_priv;
 653         }
 654
 655         if (hostapd_validate_bssid_configuration(iface))
 656                 return -1;
 657
 658         if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
 659                 os_memcpy(country, hapd->iconf->country, 3);
 660                 country[3] = '\0';
 661                 if (hostapd_set_country(hapd, country) < 0) {
 662                         wpa_printf(MSG_ERROR, "Failed to set country code");
 663                         return -1;
 664                 }
 665         }
 666
 667         if (hostapd_get_hw_features(iface)) {
 668                 /* Not all drivers support this yet, so continue without hw
 669                  * feature data. */
 670         } else {
 671                 int ret = hostapd_select_hw_mode(iface);
 672                 if (ret < 0) {
 673                         wpa_printf(MSG_ERROR, "Could not select hw_mode and "
 674                                    "channel. (%d)", ret);
 675                         return -1;
 676                 }
 677                 ret = hostapd_check_ht_capab(iface);
 678                 if (ret < 0)
 679                         return -1;
 680                 if (ret == 1) {
 681                         wpa_printf(MSG_DEBUG, "Interface initialization will "
 682                                    "be completed in a callback");
 683                         return 0;
 684                 }
 685         }
 686         return hostapd_setup_interface_complete(iface, 0);
 687 }
 688
 689
 690 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
 691 {
 692         struct hostapd_data *hapd = iface->bss[0];
 693         size_t j;
 694         u8 *prev_addr;
 695
 696         if (err) {
 697                 wpa_printf(MSG_ERROR, "Interface initialization failed");
 698                 eloop_terminate();
 699                 return -1;
 700         }
 701
 702         wpa_printf(MSG_DEBUG, "Completing interface initialization");
 703         if (hapd->iconf->channel) {
 704                 iface->freq = hostapd_hw_get_freq(hapd, hapd->iconf->channel);
 705                 wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
 706                            "Frequency: %d MHz",
 707                            hostapd_hw_mode_txt(hapd->iconf->hw_mode),
 708                            hapd->iconf->channel, iface->freq);
 709
 710                 if (hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
 711                                      hapd->iconf->channel,
 712                                      hapd->iconf->ieee80211n,
 713                                      hapd->iconf->secondary_channel)) {
 714                         wpa_printf(MSG_ERROR, "Could not set channel for "
 715                                    "kernel driver");
 716                         return -1;
 717                 }
 718         }
 719
 720         if (hapd->iconf->rts_threshold > -1 &&
 721             hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
 722                 wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
 723                            "kernel driver");
 724                 return -1;
 725         }
 726
 727         if (hapd->iconf->fragm_threshold > -1 &&
 728             hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
 729                 wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
 730                            "for kernel driver");
 731                 return -1;
 732         }
 733
 734         prev_addr = hapd->own_addr;
 735
 736         for (j = 0; j < iface->num_bss; j++) {
 737                 hapd = iface->bss[j];
 738                 if (j)
 739                         os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
 740                 if (hostapd_setup_bss(hapd, j == 0))
 741                         return -1;
 742                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
 743                         prev_addr = hapd->own_addr;
 744         }
 745
 746         hostapd_tx_queue_params(iface);
 747
 748         ap_list_init(iface);
 749
 750         if (hostapd_driver_commit(hapd) < 0) {
 751                 wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
 752                            "configuration", __func__);
 753                 return -1;
 754         }
 755
 756         wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
 757                    iface->bss[0]->conf->iface);
 758
 759         return 0;
 760 }
 761
 762
 763 /**
 764  * hostapd_setup_interface - Setup of an interface
 765  * @iface: Pointer to interface data.
 766  * Returns: 0 on success, -1 on failure
 767  *
 768  * Initializes the driver interface, validates the configuration,
 769  * and sets driver parameters based on the configuration.
 770  * Flushes old stations, sets the channel, encryption,
 771  * beacons, and WDS links based on the configuration.
 772  */
 773 int hostapd_setup_interface(struct hostapd_iface *iface)
 774 {
 775         int ret;
 776
 777         ret = setup_interface(iface);
 778         if (ret) {
 779                 wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
 780                            iface->bss[0]->conf->iface);
 781                 return -1;
 782         }
 783
 784         return 0;
 785 }
 786
 787
 788 /**
 789  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
 790  * @hapd_iface: Pointer to interface data
 791  * @conf: Pointer to per-interface configuration
 792  * @bss: Pointer to per-BSS configuration for this BSS
 793  * Returns: Pointer to allocated BSS data
 794  *
 795  * This function is used to allocate per-BSS data structure. This data will be
 796  * freed after hostapd_cleanup() is called for it during interface
 797  * deinitialization.
 798  */
 799 struct hostapd_data *
 800 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
 801                        struct hostapd_config *conf,
 802                        struct hostapd_bss_config *bss)
 803 {
 804         struct hostapd_data *hapd;
 805
 806         hapd = os_zalloc(sizeof(*hapd));
 807         if (hapd == NULL)
 808                 return NULL;
 809
 810         hostapd_set_driver_ops(&hapd->drv);
 811         hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
 812         hapd->iconf = conf;
 813         hapd->conf = bss;
 814         hapd->iface = hapd_iface;
 815         hapd->driver = hapd->iconf->driver;
 816
 817         return hapd;
 818 }
 819
 820
 821 void hostapd_interface_deinit(struct hostapd_iface *iface)
 822 {
 823         size_t j;
 824
 825         if (iface == NULL)
 826                 return;
 827
 828         hostapd_cleanup_iface_pre(iface);
 829         for (j = 0; j < iface->num_bss; j++) {
 830                 struct hostapd_data *hapd = iface->bss[j];
 831                 hostapd_free_stas(hapd);
 832                 hostapd_flush_old_stations(hapd);
 833                 hostapd_cleanup(hapd);
 834         }
 835 }
 836
 837
 838 void hostapd_interface_free(struct hostapd_iface *iface)
 839 {
 840         size_t j;
 841         for (j = 0; j < iface->num_bss; j++)
 842                 os_free(iface->bss[j]);
 843         hostapd_cleanup_iface(iface);
 844 }
 845
 846
 847 /**
 848  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
 849  * @hapd: Pointer to BSS data
 850  * @sta: Pointer to the associated STA data
 851  * @reassoc: 1 to indicate this was a re-association; 0 = first association
 852  *
 853  * This function will be called whenever a station associates with the AP. It
 854  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
 855  * from drv_callbacks.c based on driver events for drivers that take care of
 856  * management frames (IEEE 802.11 authentication and association) internally.
 857  */
 858 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
 859                            int reassoc)
 860 {
 861         if (hapd->tkip_countermeasures) {
 862                 hapd->drv.sta_deauth(hapd, sta->addr,
 863                                      WLAN_REASON_MICHAEL_MIC_FAILURE);
 864                 return;
 865         }
 866
 867         hostapd_prune_associations(hapd, sta->addr);
 868
 869         /* IEEE 802.11F (IAPP) */
 870         if (hapd->conf->ieee802_11f)
 871                 iapp_new_station(hapd->iapp, sta);
 872
 873         /* Start accounting here, if IEEE 802.1X and WPA are not used.
 874          * IEEE 802.1X/WPA code will start accounting after the station has
 875          * been authorized. */
 876         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa)
 877                 accounting_sta_start(hapd, sta);
 878
 879         /* Start IEEE 802.1X authentication process for new stations */
 880         ieee802_1x_new_station(hapd, sta);
 881         if (reassoc) {
 882                 if (sta->auth_alg != WLAN_AUTH_FT &&
 883                     !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
 884                         wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
 885         } else
 886                 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
 887 }