src/ap/beacon.c

   1 /*
   2  * hostapd / IEEE 802.11 Management: Beacon and Probe Request/Response
   3  * Copyright (c) 2002-2004, Instant802 Networks, Inc.
   4  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   5  * Copyright (c) 2008-2009, Jouni Malinen <j@w1.fi>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * Alternatively, this software may be distributed under the terms of BSD
  12  * license.
  13  *
  14  * See README and COPYING for more details.
  15  */
  16
  17 #include "utils/includes.h"
  18
  19 #ifndef CONFIG_NATIVE_WINDOWS
  20
  21 #include "utils/common.h"
  22 #include "common/ieee802_11_defs.h"
  23 #include "common/ieee802_11_common.h"
  24 #include "drivers/driver.h"
  25 #include "wps/wps_defs.h"
  26 #include "p2p/p2p.h"
  27 #include "hostapd.h"
  28 #include "ieee802_11.h"
  29 #include "wpa_auth.h"
  30 #include "wmm.h"
  31 #include "ap_config.h"
  32 #include "sta_info.h"
  33 #include "p2p_hostapd.h"
  34 #include "ap_drv_ops.h"
  35 #include "beacon.h"
  36
  37
  38 #ifdef NEED_AP_MLME
  39
  40 static u8 ieee802_11_erp_info(struct hostapd_data *hapd)
  41 {
  42         u8 erp = 0;
  43
  44         if (hapd->iface->current_mode == NULL ||
  45             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
  46                 return 0;
  47
  48         switch (hapd->iconf->cts_protection_type) {
  49         case CTS_PROTECTION_FORCE_ENABLED:
  50                 erp |= ERP_INFO_NON_ERP_PRESENT | ERP_INFO_USE_PROTECTION;
  51                 break;
  52         case CTS_PROTECTION_FORCE_DISABLED:
  53                 erp = 0;
  54                 break;
  55         case CTS_PROTECTION_AUTOMATIC:
  56                 if (hapd->iface->olbc)
  57                         erp |= ERP_INFO_USE_PROTECTION;
  58                 /* continue */
  59         case CTS_PROTECTION_AUTOMATIC_NO_OLBC:
  60                 if (hapd->iface->num_sta_non_erp > 0) {
  61                         erp |= ERP_INFO_NON_ERP_PRESENT |
  62                                 ERP_INFO_USE_PROTECTION;
  63                 }
  64                 break;
  65         }
  66         if (hapd->iface->num_sta_no_short_preamble > 0 ||
  67             hapd->iconf->preamble == LONG_PREAMBLE)
  68                 erp |= ERP_INFO_BARKER_PREAMBLE_MODE;
  69
  70         return erp;
  71 }
  72
  73
  74 static u8 * hostapd_eid_ds_params(struct hostapd_data *hapd, u8 *eid)
  75 {
  76         *eid++ = WLAN_EID_DS_PARAMS;
  77         *eid++ = 1;
  78         *eid++ = hapd->iconf->channel;
  79         return eid;
  80 }
  81
  82
  83 static u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid)
  84 {
  85         if (hapd->iface->current_mode == NULL ||
  86             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
  87                 return eid;
  88
  89         /* Set NonERP_present and use_protection bits if there
  90          * are any associated NonERP stations. */
  91         /* TODO: use_protection bit can be set to zero even if
  92          * there are NonERP stations present. This optimization
  93          * might be useful if NonERP stations are "quiet".
  94          * See 802.11g/D6 E-1 for recommended practice.
  95          * In addition, Non ERP present might be set, if AP detects Non ERP
  96          * operation on other APs. */
  97
  98         /* Add ERP Information element */
  99         *eid++ = WLAN_EID_ERP_INFO;
 100         *eid++ = 1;
 101         *eid++ = ieee802_11_erp_info(hapd);
 102
 103         return eid;
 104 }
 105
 106
 107 static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing,
 108                                     struct hostapd_channel_data *start,
 109                                     struct hostapd_channel_data *prev)
 110 {
 111         if (end - pos < 3)
 112                 return pos;
 113
 114         /* first channel number */
 115         *pos++ = start->chan;
 116         /* number of channels */
 117         *pos++ = (prev->chan - start->chan) / chan_spacing + 1;
 118         /* maximum transmit power level */
 119         *pos++ = start->max_tx_power;
 120
 121         return pos;
 122 }
 123
 124
 125 static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
 126                                 int max_len)
 127 {
 128         u8 *pos = eid;
 129         u8 *end = eid + max_len;
 130         int i;
 131         struct hostapd_hw_modes *mode;
 132         struct hostapd_channel_data *start, *prev;
 133         int chan_spacing = 1;
 134
 135         if (!hapd->iconf->ieee80211d || max_len < 6 ||
 136             hapd->iface->current_mode == NULL)
 137                 return eid;
 138
 139         *pos++ = WLAN_EID_COUNTRY;
 140         pos++; /* length will be set later */
 141         os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */
 142         pos += 3;
 143
 144         mode = hapd->iface->current_mode;
 145         if (mode->mode == HOSTAPD_MODE_IEEE80211A)
 146                 chan_spacing = 4;
 147
 148         start = prev = NULL;
 149         for (i = 0; i < mode->num_channels; i++) {
 150                 struct hostapd_channel_data *chan = &mode->channels[i];
 151                 if (chan->flag & HOSTAPD_CHAN_DISABLED)
 152                         continue;
 153                 if (start && prev &&
 154                     prev->chan + chan_spacing == chan->chan &&
 155                     start->max_tx_power == chan->max_tx_power) {
 156                         prev = chan;
 157                         continue; /* can use same entry */
 158                 }
 159
 160                 if (start) {
 161                         pos = hostapd_eid_country_add(pos, end, chan_spacing,
 162                                                       start, prev);
 163                         start = NULL;
 164                 }
 165
 166                 /* Start new group */
 167                 start = prev = chan;
 168         }
 169
 170         if (start) {
 171                 pos = hostapd_eid_country_add(pos, end, chan_spacing,
 172                                               start, prev);
 173         }
 174
 175         if ((pos - eid) & 1) {
 176                 if (end - pos < 1)
 177                         return eid;
 178                 *pos++ = 0; /* pad for 16-bit alignment */
 179         }
 180
 181         eid[1] = (pos - eid) - 2;
 182
 183         return pos;
 184 }
 185
 186
 187 static u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len)
 188 {
 189         const u8 *ie;
 190         size_t ielen;
 191
 192         ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
 193         if (ie == NULL || ielen > len)
 194                 return eid;
 195
 196         os_memcpy(eid, ie, ielen);
 197         return eid + ielen;
 198 }
 199
 200
 201 void handle_probe_req(struct hostapd_data *hapd,
 202                       const struct ieee80211_mgmt *mgmt, size_t len)
 203 {
 204         struct ieee80211_mgmt *resp;
 205         struct ieee802_11_elems elems;
 206         char *ssid;
 207         u8 *pos, *epos;
 208         const u8 *ie;
 209         size_t ssid_len, ie_len;
 210         struct sta_info *sta = NULL;
 211         size_t buflen;
 212         size_t i;
 213
 214         ie = mgmt->u.probe_req.variable;
 215         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
 216                 return;
 217         ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
 218
 219         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
 220                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
 221                                             mgmt->sa, mgmt->da, mgmt->bssid,
 222                                             ie, ie_len) > 0)
 223                         return;
 224
 225         if (!hapd->iconf->send_probe_response)
 226                 return;
 227
 228         if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
 229                 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
 230                            MAC2STR(mgmt->sa));
 231                 return;
 232         }
 233
 234         ssid = NULL;
 235         ssid_len = 0;
 236
 237         if ((!elems.ssid || !elems.supp_rates)) {
 238                 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
 239                            "without SSID or supported rates element",
 240                            MAC2STR(mgmt->sa));
 241                 return;
 242         }
 243
 244 #ifdef CONFIG_P2P
 245         if (hapd->p2p && elems.wps_ie) {
 246                 struct wpabuf *wps;
 247                 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
 248                 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
 249                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 250                                    "due to mismatch with Requested Device "
 251                                    "Type");
 252                         wpabuf_free(wps);
 253                         return;
 254                 }
 255                 wpabuf_free(wps);
 256         }
 257 #endif /* CONFIG_P2P */
 258
 259         if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0) {
 260                 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
 261                            "broadcast SSID ignored", MAC2STR(mgmt->sa));
 262                 return;
 263         }
 264
 265         sta = ap_get_sta(hapd, mgmt->sa);
 266
 267 #ifdef CONFIG_P2P
 268         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 269             elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
 270             os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
 271                       P2P_WILDCARD_SSID_LEN) == 0) {
 272                 /* Process P2P Wildcard SSID like Wildcard SSID */
 273                 elems.ssid_len = 0;
 274         }
 275 #endif /* CONFIG_P2P */
 276
 277         if (elems.ssid_len == 0 ||
 278             (elems.ssid_len == hapd->conf->ssid.ssid_len &&
 279              os_memcmp(elems.ssid, hapd->conf->ssid.ssid, elems.ssid_len) ==
 280              0)) {
 281                 ssid = hapd->conf->ssid.ssid;
 282                 ssid_len = hapd->conf->ssid.ssid_len;
 283                 if (sta)
 284                         sta->ssid_probe = &hapd->conf->ssid;
 285         }
 286
 287         if (!ssid) {
 288                 if (!(mgmt->da[0] & 0x01)) {
 289                         char ssid_txt[33];
 290                         ieee802_11_print_ssid(ssid_txt, elems.ssid,
 291                                               elems.ssid_len);
 292                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 293                                    " for foreign SSID '%s' (DA " MACSTR ")",
 294                                    MAC2STR(mgmt->sa), ssid_txt,
 295                                    MAC2STR(mgmt->da));
 296                 }
 297                 return;
 298         }
 299
 300         /* TODO: verify that supp_rates contains at least one matching rate
 301          * with AP configuration */
 302 #define MAX_PROBERESP_LEN 768
 303         buflen = MAX_PROBERESP_LEN;
 304 #ifdef CONFIG_WPS
 305         if (hapd->wps_probe_resp_ie)
 306                 buflen += wpabuf_len(hapd->wps_probe_resp_ie);
 307 #endif /* CONFIG_WPS */
 308 #ifdef CONFIG_P2P
 309         if (hapd->p2p_probe_resp_ie)
 310                 buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
 311 #endif /* CONFIG_P2P */
 312         resp = os_zalloc(buflen);
 313         if (resp == NULL)
 314                 return;
 315         epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
 316
 317         resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 318                                            WLAN_FC_STYPE_PROBE_RESP);
 319         os_memcpy(resp->da, mgmt->sa, ETH_ALEN);
 320         os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
 321
 322         os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
 323         resp->u.probe_resp.beacon_int =
 324                 host_to_le16(hapd->iconf->beacon_int);
 325
 326         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 327         resp->u.probe_resp.capab_info =
 328                 host_to_le16(hostapd_own_capab_info(hapd, sta, 1));
 329
 330         pos = resp->u.probe_resp.variable;
 331         *pos++ = WLAN_EID_SSID;
 332         *pos++ = ssid_len;
 333         os_memcpy(pos, ssid, ssid_len);
 334         pos += ssid_len;
 335
 336         /* Supported rates */
 337         pos = hostapd_eid_supp_rates(hapd, pos);
 338
 339         /* DS Params */
 340         pos = hostapd_eid_ds_params(hapd, pos);
 341
 342         pos = hostapd_eid_country(hapd, pos, epos - pos);
 343
 344         /* ERP Information element */
 345         pos = hostapd_eid_erp_info(hapd, pos);
 346
 347         /* Extended supported rates */
 348         pos = hostapd_eid_ext_supp_rates(hapd, pos);
 349
 350         /* RSN, MDIE, WPA */
 351         pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 352
 353 #ifdef CONFIG_IEEE80211N
 354         pos = hostapd_eid_ht_capabilities(hapd, pos);
 355         pos = hostapd_eid_ht_operation(hapd, pos);
 356 #endif /* CONFIG_IEEE80211N */
 357
 358         pos = hostapd_eid_ext_capab(hapd, pos);
 359
 360         pos = hostapd_eid_interworking(hapd, pos);
 361
 362         /* Wi-Fi Alliance WMM */
 363         pos = hostapd_eid_wmm(hapd, pos);
 364
 365 #ifdef CONFIG_WPS
 366         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
 367                 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
 368                           wpabuf_len(hapd->wps_probe_resp_ie));
 369                 pos += wpabuf_len(hapd->wps_probe_resp_ie);
 370         }
 371 #endif /* CONFIG_WPS */
 372
 373 #ifdef CONFIG_P2P
 374         if ((hapd->conf->p2p & P2P_ENABLED) && elems.p2p &&
 375             hapd->p2p_probe_resp_ie) {
 376                 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
 377                           wpabuf_len(hapd->p2p_probe_resp_ie));
 378                 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
 379         }
 380 #endif /* CONFIG_P2P */
 381 #ifdef CONFIG_P2P_MANAGER
 382         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 383             P2P_MANAGE)
 384                 pos = hostapd_eid_p2p_manage(hapd, pos);
 385 #endif /* CONFIG_P2P_MANAGER */
 386
 387         if (hostapd_drv_send_mlme(hapd, resp, pos - (u8 *) resp) < 0)
 388                 perror("handle_probe_req: send");
 389
 390         os_free(resp);
 391
 392         wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
 393                    "SSID", MAC2STR(mgmt->sa),
 394                    elems.ssid_len == 0 ? "broadcast" : "our");
 395 }
 396
 397 #endif /* NEED_AP_MLME */
 398
 399
 400 void ieee802_11_set_beacon(struct hostapd_data *hapd)
 401 {
 402         struct ieee80211_mgmt *head = NULL;
 403         u8 *tail = NULL;
 404         size_t head_len = 0, tail_len = 0;
 405         struct wpa_driver_ap_params params;
 406         struct wpabuf *beacon, *proberesp, *assocresp;
 407 #ifdef NEED_AP_MLME
 408         u16 capab_info;
 409         u8 *pos, *tailpos;
 410 #endif /* NEED_AP_MLME */
 411
 412         hapd->beacon_set_done = 1;
 413
 414 #ifdef NEED_AP_MLME
 415
 416 #define BEACON_HEAD_BUF_SIZE 256
 417 #define BEACON_TAIL_BUF_SIZE 512
 418         head = os_zalloc(BEACON_HEAD_BUF_SIZE);
 419         tail_len = BEACON_TAIL_BUF_SIZE;
 420 #ifdef CONFIG_WPS
 421         if (hapd->conf->wps_state && hapd->wps_beacon_ie)
 422                 tail_len += wpabuf_len(hapd->wps_beacon_ie);
 423 #endif /* CONFIG_WPS */
 424 #ifdef CONFIG_P2P
 425         if (hapd->p2p_beacon_ie)
 426                 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
 427 #endif /* CONFIG_P2P */
 428         tailpos = tail = os_malloc(tail_len);
 429         if (head == NULL || tail == NULL) {
 430                 wpa_printf(MSG_ERROR, "Failed to set beacon data");
 431                 os_free(head);
 432                 os_free(tail);
 433                 return;
 434         }
 435
 436         head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 437                                            WLAN_FC_STYPE_BEACON);
 438         head->duration = host_to_le16(0);
 439         os_memset(head->da, 0xff, ETH_ALEN);
 440
 441         os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
 442         os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
 443         head->u.beacon.beacon_int =
 444                 host_to_le16(hapd->iconf->beacon_int);
 445
 446         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 447         capab_info = hostapd_own_capab_info(hapd, NULL, 0);
 448         head->u.beacon.capab_info = host_to_le16(capab_info);
 449         pos = &head->u.beacon.variable[0];
 450
 451         /* SSID */
 452         *pos++ = WLAN_EID_SSID;
 453         if (hapd->conf->ignore_broadcast_ssid == 2) {
 454                 /* clear the data, but keep the correct length of the SSID */
 455                 *pos++ = hapd->conf->ssid.ssid_len;
 456                 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
 457                 pos += hapd->conf->ssid.ssid_len;
 458         } else if (hapd->conf->ignore_broadcast_ssid) {
 459                 *pos++ = 0; /* empty SSID */
 460         } else {
 461                 *pos++ = hapd->conf->ssid.ssid_len;
 462                 os_memcpy(pos, hapd->conf->ssid.ssid,
 463                           hapd->conf->ssid.ssid_len);
 464                 pos += hapd->conf->ssid.ssid_len;
 465         }
 466
 467         /* Supported rates */
 468         pos = hostapd_eid_supp_rates(hapd, pos);
 469
 470         /* DS Params */
 471         pos = hostapd_eid_ds_params(hapd, pos);
 472
 473         head_len = pos - (u8 *) head;
 474
 475         tailpos = hostapd_eid_country(hapd, tailpos,
 476                                       tail + BEACON_TAIL_BUF_SIZE - tailpos);
 477
 478         /* ERP Information element */
 479         tailpos = hostapd_eid_erp_info(hapd, tailpos);
 480
 481         /* Extended supported rates */
 482         tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
 483
 484         /* RSN, MDIE, WPA */
 485         tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
 486                                   tailpos);
 487
 488 #ifdef CONFIG_IEEE80211N
 489         tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
 490         tailpos = hostapd_eid_ht_operation(hapd, tailpos);
 491 #endif /* CONFIG_IEEE80211N */
 492
 493         tailpos = hostapd_eid_ext_capab(hapd, tailpos);
 494
 495         tailpos = hostapd_eid_interworking(hapd, tailpos);
 496
 497         /* Wi-Fi Alliance WMM */
 498         tailpos = hostapd_eid_wmm(hapd, tailpos);
 499
 500 #ifdef CONFIG_WPS
 501         if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
 502                 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
 503                           wpabuf_len(hapd->wps_beacon_ie));
 504                 tailpos += wpabuf_len(hapd->wps_beacon_ie);
 505         }
 506 #endif /* CONFIG_WPS */
 507
 508 #ifdef CONFIG_P2P
 509         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
 510                 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
 511                           wpabuf_len(hapd->p2p_beacon_ie));
 512                 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
 513         }
 514 #endif /* CONFIG_P2P */
 515 #ifdef CONFIG_P2P_MANAGER
 516         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 517             P2P_MANAGE)
 518                 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
 519 #endif /* CONFIG_P2P_MANAGER */
 520
 521         tail_len = tailpos > tail ? tailpos - tail : 0;
 522
 523 #endif /* NEED_AP_MLME */
 524
 525         os_memset(&params, 0, sizeof(params));
 526         params.head = (u8 *) head;
 527         params.head_len = head_len;
 528         params.tail = tail;
 529         params.tail_len = tail_len;
 530         params.dtim_period = hapd->conf->dtim_period;
 531         params.beacon_int = hapd->iconf->beacon_int;
 532         params.ssid = (u8 *) hapd->conf->ssid.ssid;
 533         params.ssid_len = hapd->conf->ssid.ssid_len;
 534         params.pairwise_ciphers = hapd->conf->rsn_pairwise ?
 535                 hapd->conf->rsn_pairwise : hapd->conf->wpa_pairwise;
 536         params.group_cipher = hapd->conf->wpa_group;
 537         params.key_mgmt_suites = hapd->conf->wpa_key_mgmt;
 538         params.auth_algs = hapd->conf->auth_algs;
 539         params.wpa_version = hapd->conf->wpa;
 540         params.privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
 541                 (hapd->conf->ieee802_1x &&
 542                  (hapd->conf->default_wep_key_len ||
 543                   hapd->conf->individual_wep_key_len));
 544         switch (hapd->conf->ignore_broadcast_ssid) {
 545         case 0:
 546                 params.hide_ssid = NO_SSID_HIDING;
 547                 break;
 548         case 1:
 549                 params.hide_ssid = HIDDEN_SSID_ZERO_LEN;
 550                 break;
 551         case 2:
 552                 params.hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
 553                 break;
 554         }
 555         hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp);
 556         params.beacon_ies = beacon;
 557         params.proberesp_ies = proberesp;
 558         params.assocresp_ies = assocresp;
 559         params.isolate = hapd->conf->isolate;
 560 #ifdef NEED_AP_MLME
 561         params.cts_protect = !!(ieee802_11_erp_info(hapd) &
 562                                 ERP_INFO_USE_PROTECTION);
 563         params.preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
 564                 hapd->iconf->preamble == SHORT_PREAMBLE;
 565         if (hapd->iface->current_mode &&
 566             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
 567                 params.short_slot_time =
 568                         hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
 569         else
 570                 params.short_slot_time = -1;
 571         if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
 572                 params.ht_opmode = -1;
 573         else
 574                 params.ht_opmode = hapd->iface->ht_op_mode;
 575 #endif /* NEED_AP_MLME */
 576         if (hostapd_drv_set_ap(hapd, &params))
 577                 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
 578         hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
 579
 580         os_free(tail);
 581         os_free(head);
 582 }
 583
 584
 585 void ieee802_11_set_beacons(struct hostapd_iface *iface)
 586 {
 587         size_t i;
 588         for (i = 0; i < iface->num_bss; i++)
 589                 ieee802_11_set_beacon(iface->bss[i]);
 590 }
 591
 592 #endif /* CONFIG_NATIVE_WINDOWS */