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         if (hapd->iface->olbc)
  49                 erp |= ERP_INFO_USE_PROTECTION;
  50         if (hapd->iface->num_sta_non_erp > 0) {
  51                 erp |= ERP_INFO_NON_ERP_PRESENT |
  52                         ERP_INFO_USE_PROTECTION;
  53         }
  54         if (hapd->iface->num_sta_no_short_preamble > 0 ||
  55             hapd->iconf->preamble == LONG_PREAMBLE)
  56                 erp |= ERP_INFO_BARKER_PREAMBLE_MODE;
  57
  58         return erp;
  59 }
  60
  61
  62 static u8 * hostapd_eid_ds_params(struct hostapd_data *hapd, u8 *eid)
  63 {
  64         *eid++ = WLAN_EID_DS_PARAMS;
  65         *eid++ = 1;
  66         *eid++ = hapd->iconf->channel;
  67         return eid;
  68 }
  69
  70
  71 static u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid)
  72 {
  73         if (hapd->iface->current_mode == NULL ||
  74             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
  75                 return eid;
  76
  77         /* Set NonERP_present and use_protection bits if there
  78          * are any associated NonERP stations. */
  79         /* TODO: use_protection bit can be set to zero even if
  80          * there are NonERP stations present. This optimization
  81          * might be useful if NonERP stations are "quiet".
  82          * See 802.11g/D6 E-1 for recommended practice.
  83          * In addition, Non ERP present might be set, if AP detects Non ERP
  84          * operation on other APs. */
  85
  86         /* Add ERP Information element */
  87         *eid++ = WLAN_EID_ERP_INFO;
  88         *eid++ = 1;
  89         *eid++ = ieee802_11_erp_info(hapd);
  90
  91         return eid;
  92 }
  93
  94
  95 static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing,
  96                                     struct hostapd_channel_data *start,
  97                                     struct hostapd_channel_data *prev)
  98 {
  99         if (end - pos < 3)
 100                 return pos;
 101
 102         /* first channel number */
 103         *pos++ = start->chan;
 104         /* number of channels */
 105         *pos++ = (prev->chan - start->chan) / chan_spacing + 1;
 106         /* maximum transmit power level */
 107         *pos++ = start->max_tx_power;
 108
 109         return pos;
 110 }
 111
 112
 113 static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
 114                                 int max_len)
 115 {
 116         u8 *pos = eid;
 117         u8 *end = eid + max_len;
 118         int i;
 119         struct hostapd_hw_modes *mode;
 120         struct hostapd_channel_data *start, *prev;
 121         int chan_spacing = 1;
 122
 123         if (!hapd->iconf->ieee80211d || max_len < 6 ||
 124             hapd->iface->current_mode == NULL)
 125                 return eid;
 126
 127         *pos++ = WLAN_EID_COUNTRY;
 128         pos++; /* length will be set later */
 129         os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */
 130         pos += 3;
 131
 132         mode = hapd->iface->current_mode;
 133         if (mode->mode == HOSTAPD_MODE_IEEE80211A)
 134                 chan_spacing = 4;
 135
 136         start = prev = NULL;
 137         for (i = 0; i < mode->num_channels; i++) {
 138                 struct hostapd_channel_data *chan = &mode->channels[i];
 139                 if (chan->flag & HOSTAPD_CHAN_DISABLED)
 140                         continue;
 141                 if (start && prev &&
 142                     prev->chan + chan_spacing == chan->chan &&
 143                     start->max_tx_power == chan->max_tx_power) {
 144                         prev = chan;
 145                         continue; /* can use same entry */
 146                 }
 147
 148                 if (start) {
 149                         pos = hostapd_eid_country_add(pos, end, chan_spacing,
 150                                                       start, prev);
 151                         start = NULL;
 152                 }
 153
 154                 /* Start new group */
 155                 start = prev = chan;
 156         }
 157
 158         if (start) {
 159                 pos = hostapd_eid_country_add(pos, end, chan_spacing,
 160                                               start, prev);
 161         }
 162
 163         if ((pos - eid) & 1) {
 164                 if (end - pos < 1)
 165                         return eid;
 166                 *pos++ = 0; /* pad for 16-bit alignment */
 167         }
 168
 169         eid[1] = (pos - eid) - 2;
 170
 171         return pos;
 172 }
 173
 174
 175 static u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len)
 176 {
 177         const u8 *ie;
 178         size_t ielen;
 179
 180         ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
 181         if (ie == NULL || ielen > len)
 182                 return eid;
 183
 184         os_memcpy(eid, ie, ielen);
 185         return eid + ielen;
 186 }
 187
 188
 189 static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
 190                                    struct sta_info *sta,
 191                                    const struct ieee80211_mgmt *req,
 192                                    int is_p2p, size_t *resp_len)
 193 {
 194         struct ieee80211_mgmt *resp;
 195         u8 *pos, *epos;
 196         size_t buflen;
 197
 198 #define MAX_PROBERESP_LEN 768
 199         buflen = MAX_PROBERESP_LEN;
 200 #ifdef CONFIG_WPS
 201         if (hapd->wps_probe_resp_ie)
 202                 buflen += wpabuf_len(hapd->wps_probe_resp_ie);
 203 #endif /* CONFIG_WPS */
 204 #ifdef CONFIG_P2P
 205         if (hapd->p2p_probe_resp_ie)
 206                 buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
 207 #endif /* CONFIG_P2P */
 208         resp = os_zalloc(buflen);
 209         if (resp == NULL)
 210                 return NULL;
 211
 212         epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
 213
 214         resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 215                                            WLAN_FC_STYPE_PROBE_RESP);
 216         if (req)
 217                 os_memcpy(resp->da, req->sa, ETH_ALEN);
 218         os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
 219
 220         os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
 221         resp->u.probe_resp.beacon_int =
 222                 host_to_le16(hapd->iconf->beacon_int);
 223
 224         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 225         resp->u.probe_resp.capab_info =
 226                 host_to_le16(hostapd_own_capab_info(hapd, sta, 1));
 227
 228         pos = resp->u.probe_resp.variable;
 229         *pos++ = WLAN_EID_SSID;
 230         *pos++ = hapd->conf->ssid.ssid_len;
 231         os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
 232         pos += hapd->conf->ssid.ssid_len;
 233
 234         /* Supported rates */
 235         pos = hostapd_eid_supp_rates(hapd, pos);
 236
 237         /* DS Params */
 238         pos = hostapd_eid_ds_params(hapd, pos);
 239
 240         pos = hostapd_eid_country(hapd, pos, epos - pos);
 241
 242         /* ERP Information element */
 243         pos = hostapd_eid_erp_info(hapd, pos);
 244
 245         /* Extended supported rates */
 246         pos = hostapd_eid_ext_supp_rates(hapd, pos);
 247
 248         /* RSN, MDIE, WPA */
 249         pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 250
 251 #ifdef CONFIG_IEEE80211N
 252         pos = hostapd_eid_ht_capabilities(hapd, pos);
 253         pos = hostapd_eid_ht_operation(hapd, pos);
 254 #endif /* CONFIG_IEEE80211N */
 255
 256         pos = hostapd_eid_ext_capab(hapd, pos);
 257
 258         pos = hostapd_eid_time_adv(hapd, pos);
 259         pos = hostapd_eid_time_zone(hapd, pos);
 260
 261         pos = hostapd_eid_interworking(hapd, pos);
 262         pos = hostapd_eid_adv_proto(hapd, pos);
 263         pos = hostapd_eid_roaming_consortium(hapd, pos);
 264
 265 #ifdef CONFIG_IEEE80211AC
 266         pos = hostapd_eid_vht_capabilities(hapd, pos);
 267         pos = hostapd_eid_vht_operation(hapd, pos);
 268 #endif /* CONFIG_IEEE80211AC */
 269
 270         /* Wi-Fi Alliance WMM */
 271         pos = hostapd_eid_wmm(hapd, pos);
 272
 273 #ifdef CONFIG_WPS
 274         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
 275                 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
 276                           wpabuf_len(hapd->wps_probe_resp_ie));
 277                 pos += wpabuf_len(hapd->wps_probe_resp_ie);
 278         }
 279 #endif /* CONFIG_WPS */
 280
 281 #ifdef CONFIG_P2P
 282         if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
 283             hapd->p2p_probe_resp_ie) {
 284                 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
 285                           wpabuf_len(hapd->p2p_probe_resp_ie));
 286                 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
 287         }
 288 #endif /* CONFIG_P2P */
 289 #ifdef CONFIG_P2P_MANAGER
 290         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 291             P2P_MANAGE)
 292                 pos = hostapd_eid_p2p_manage(hapd, pos);
 293 #endif /* CONFIG_P2P_MANAGER */
 294
 295         *resp_len = pos - (u8 *) resp;
 296         return (u8 *) resp;
 297 }
 298
 299
 300 void handle_probe_req(struct hostapd_data *hapd,
 301                       const struct ieee80211_mgmt *mgmt, size_t len,
 302                       int ssi_signal)
 303 {
 304         u8 *resp;
 305         struct ieee802_11_elems elems;
 306         const u8 *ie;
 307         size_t ie_len;
 308         struct sta_info *sta = NULL;
 309         size_t i, resp_len;
 310         int noack;
 311
 312         ie = mgmt->u.probe_req.variable;
 313         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
 314                 return;
 315         ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
 316
 317         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
 318                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
 319                                             mgmt->sa, mgmt->da, mgmt->bssid,
 320                                             ie, ie_len, ssi_signal) > 0)
 321                         return;
 322
 323         if (!hapd->iconf->send_probe_response)
 324                 return;
 325
 326         if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
 327                 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
 328                            MAC2STR(mgmt->sa));
 329                 return;
 330         }
 331
 332         if ((!elems.ssid || !elems.supp_rates)) {
 333                 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
 334                            "without SSID or supported rates element",
 335                            MAC2STR(mgmt->sa));
 336                 return;
 337         }
 338
 339 #ifdef CONFIG_P2P
 340         if (hapd->p2p && elems.wps_ie) {
 341                 struct wpabuf *wps;
 342                 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
 343                 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
 344                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 345                                    "due to mismatch with Requested Device "
 346                                    "Type");
 347                         wpabuf_free(wps);
 348                         return;
 349                 }
 350                 wpabuf_free(wps);
 351         }
 352
 353         if (hapd->p2p && elems.p2p) {
 354                 struct wpabuf *p2p;
 355                 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
 356                 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
 357                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 358                                    "due to mismatch with Device ID");
 359                         wpabuf_free(p2p);
 360                         return;
 361                 }
 362                 wpabuf_free(p2p);
 363         }
 364 #endif /* CONFIG_P2P */
 365
 366         if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0) {
 367                 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
 368                            "broadcast SSID ignored", MAC2STR(mgmt->sa));
 369                 return;
 370         }
 371
 372         sta = ap_get_sta(hapd, mgmt->sa);
 373
 374 #ifdef CONFIG_P2P
 375         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 376             elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
 377             os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
 378                       P2P_WILDCARD_SSID_LEN) == 0) {
 379                 /* Process P2P Wildcard SSID like Wildcard SSID */
 380                 elems.ssid_len = 0;
 381         }
 382 #endif /* CONFIG_P2P */
 383
 384         if (elems.ssid_len == 0 ||
 385             (elems.ssid_len == hapd->conf->ssid.ssid_len &&
 386              os_memcmp(elems.ssid, hapd->conf->ssid.ssid, elems.ssid_len) ==
 387              0)) {
 388                 if (sta)
 389                         sta->ssid_probe = &hapd->conf->ssid;
 390         } else {
 391                 if (!(mgmt->da[0] & 0x01)) {
 392                         char ssid_txt[33];
 393                         ieee802_11_print_ssid(ssid_txt, elems.ssid,
 394                                               elems.ssid_len);
 395                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 396                                    " for foreign SSID '%s' (DA " MACSTR ")",
 397                                    MAC2STR(mgmt->sa), ssid_txt,
 398                                    MAC2STR(mgmt->da));
 399                 }
 400                 return;
 401         }
 402
 403 #ifdef CONFIG_INTERWORKING
 404         if (elems.interworking && elems.interworking_len >= 1) {
 405                 u8 ant = elems.interworking[0] & 0x0f;
 406                 if (ant != INTERWORKING_ANT_WILDCARD &&
 407                     ant != hapd->conf->access_network_type) {
 408                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 409                                    " for mismatching ANT %u ignored",
 410                                    MAC2STR(mgmt->sa), ant);
 411                         return;
 412                 }
 413         }
 414
 415         if (elems.interworking &&
 416             (elems.interworking_len == 7 || elems.interworking_len == 9)) {
 417                 const u8 *hessid;
 418                 if (elems.interworking_len == 7)
 419                         hessid = elems.interworking + 1;
 420                 else
 421                         hessid = elems.interworking + 1 + 2;
 422                 if (!is_broadcast_ether_addr(hessid) &&
 423                     os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
 424                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 425                                    " for mismatching HESSID " MACSTR
 426                                    " ignored",
 427                                    MAC2STR(mgmt->sa), MAC2STR(hessid));
 428                         return;
 429                 }
 430         }
 431 #endif /* CONFIG_INTERWORKING */
 432
 433         /* TODO: verify that supp_rates contains at least one matching rate
 434          * with AP configuration */
 435
 436         resp = hostapd_gen_probe_resp(hapd, sta, mgmt, elems.p2p != NULL,
 437                                       &resp_len);
 438         if (resp == NULL)
 439                 return;
 440
 441         /*
 442          * If this is a broadcast probe request, apply no ack policy to avoid
 443          * excessive retries.
 444          */
 445         noack = !!(elems.ssid_len == 0 && is_broadcast_ether_addr(mgmt->da));
 446
 447         if (hostapd_drv_send_mlme(hapd, resp, resp_len, noack) < 0)
 448                 perror("handle_probe_req: send");
 449
 450         os_free(resp);
 451
 452         wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
 453                    "SSID", MAC2STR(mgmt->sa),
 454                    elems.ssid_len == 0 ? "broadcast" : "our");
 455 }
 456
 457
 458 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
 459                                         size_t *resp_len)
 460 {
 461         /* check probe response offloading caps and print warnings */
 462         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
 463                 return NULL;
 464
 465 #ifdef CONFIG_WPS
 466         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
 467             (!(hapd->iface->probe_resp_offloads &
 468                (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
 469                 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
 470                 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
 471                            "Probe Response while not supporting this");
 472 #endif /* CONFIG_WPS */
 473
 474 #ifdef CONFIG_P2P
 475         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
 476             !(hapd->iface->probe_resp_offloads &
 477               WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
 478                 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
 479                            "Probe Response while not supporting this");
 480 #endif  /* CONFIG_P2P */
 481
 482         if (hapd->conf->interworking &&
 483             !(hapd->iface->probe_resp_offloads &
 484               WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
 485                 wpa_printf(MSG_WARNING, "Device is trying to offload "
 486                            "Interworking Probe Response while not supporting "
 487                            "this");
 488
 489         /* Generate a Probe Response template for the non-P2P case */
 490         return hostapd_gen_probe_resp(hapd, NULL, NULL, 0, resp_len);
 491 }
 492
 493 #endif /* NEED_AP_MLME */
 494
 495
 496 void ieee802_11_set_beacon(struct hostapd_data *hapd)
 497 {
 498         struct ieee80211_mgmt *head = NULL;
 499         u8 *tail = NULL;
 500         size_t head_len = 0, tail_len = 0;
 501         u8 *resp = NULL;
 502         size_t resp_len = 0;
 503         struct wpa_driver_ap_params params;
 504         struct wpabuf *beacon, *proberesp, *assocresp;
 505 #ifdef NEED_AP_MLME
 506         u16 capab_info;
 507         u8 *pos, *tailpos;
 508 #endif /* NEED_AP_MLME */
 509
 510         hapd->beacon_set_done = 1;
 511
 512 #ifdef NEED_AP_MLME
 513
 514 #define BEACON_HEAD_BUF_SIZE 256
 515 #define BEACON_TAIL_BUF_SIZE 512
 516         head = os_zalloc(BEACON_HEAD_BUF_SIZE);
 517         tail_len = BEACON_TAIL_BUF_SIZE;
 518 #ifdef CONFIG_WPS
 519         if (hapd->conf->wps_state && hapd->wps_beacon_ie)
 520                 tail_len += wpabuf_len(hapd->wps_beacon_ie);
 521 #endif /* CONFIG_WPS */
 522 #ifdef CONFIG_P2P
 523         if (hapd->p2p_beacon_ie)
 524                 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
 525 #endif /* CONFIG_P2P */
 526         tailpos = tail = os_malloc(tail_len);
 527         if (head == NULL || tail == NULL) {
 528                 wpa_printf(MSG_ERROR, "Failed to set beacon data");
 529                 os_free(head);
 530                 os_free(tail);
 531                 return;
 532         }
 533
 534         head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 535                                            WLAN_FC_STYPE_BEACON);
 536         head->duration = host_to_le16(0);
 537         os_memset(head->da, 0xff, ETH_ALEN);
 538
 539         os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
 540         os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
 541         head->u.beacon.beacon_int =
 542                 host_to_le16(hapd->iconf->beacon_int);
 543
 544         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 545         capab_info = hostapd_own_capab_info(hapd, NULL, 0);
 546         head->u.beacon.capab_info = host_to_le16(capab_info);
 547         pos = &head->u.beacon.variable[0];
 548
 549         /* SSID */
 550         *pos++ = WLAN_EID_SSID;
 551         if (hapd->conf->ignore_broadcast_ssid == 2) {
 552                 /* clear the data, but keep the correct length of the SSID */
 553                 *pos++ = hapd->conf->ssid.ssid_len;
 554                 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
 555                 pos += hapd->conf->ssid.ssid_len;
 556         } else if (hapd->conf->ignore_broadcast_ssid) {
 557                 *pos++ = 0; /* empty SSID */
 558         } else {
 559                 *pos++ = hapd->conf->ssid.ssid_len;
 560                 os_memcpy(pos, hapd->conf->ssid.ssid,
 561                           hapd->conf->ssid.ssid_len);
 562                 pos += hapd->conf->ssid.ssid_len;
 563         }
 564
 565         /* Supported rates */
 566         pos = hostapd_eid_supp_rates(hapd, pos);
 567
 568         /* DS Params */
 569         pos = hostapd_eid_ds_params(hapd, pos);
 570
 571         head_len = pos - (u8 *) head;
 572
 573         tailpos = hostapd_eid_country(hapd, tailpos,
 574                                       tail + BEACON_TAIL_BUF_SIZE - tailpos);
 575
 576         /* ERP Information element */
 577         tailpos = hostapd_eid_erp_info(hapd, tailpos);
 578
 579         /* Extended supported rates */
 580         tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
 581
 582         /* RSN, MDIE, WPA */
 583         tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
 584                                   tailpos);
 585
 586 #ifdef CONFIG_IEEE80211N
 587         tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
 588         tailpos = hostapd_eid_ht_operation(hapd, tailpos);
 589 #endif /* CONFIG_IEEE80211N */
 590
 591         tailpos = hostapd_eid_ext_capab(hapd, tailpos);
 592
 593         /*
 594          * TODO: Time Advertisement element should only be included in some
 595          * DTIM Beacon frames.
 596          */
 597         tailpos = hostapd_eid_time_adv(hapd, tailpos);
 598
 599         tailpos = hostapd_eid_interworking(hapd, tailpos);
 600         tailpos = hostapd_eid_adv_proto(hapd, tailpos);
 601         tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
 602
 603 #ifdef CONFIG_IEEE80211AC
 604         tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
 605         tailpos = hostapd_eid_vht_operation(hapd, tailpos);
 606 #endif /* CONFIG_IEEE80211AC */
 607
 608         /* Wi-Fi Alliance WMM */
 609         tailpos = hostapd_eid_wmm(hapd, tailpos);
 610
 611 #ifdef CONFIG_WPS
 612         if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
 613                 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
 614                           wpabuf_len(hapd->wps_beacon_ie));
 615                 tailpos += wpabuf_len(hapd->wps_beacon_ie);
 616         }
 617 #endif /* CONFIG_WPS */
 618
 619 #ifdef CONFIG_P2P
 620         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
 621                 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
 622                           wpabuf_len(hapd->p2p_beacon_ie));
 623                 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
 624         }
 625 #endif /* CONFIG_P2P */
 626 #ifdef CONFIG_P2P_MANAGER
 627         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 628             P2P_MANAGE)
 629                 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
 630 #endif /* CONFIG_P2P_MANAGER */
 631
 632         tail_len = tailpos > tail ? tailpos - tail : 0;
 633
 634         resp = hostapd_probe_resp_offloads(hapd, &resp_len);
 635 #endif /* NEED_AP_MLME */
 636
 637         os_memset(&params, 0, sizeof(params));
 638         params.head = (u8 *) head;
 639         params.head_len = head_len;
 640         params.tail = tail;
 641         params.tail_len = tail_len;
 642         params.proberesp = resp;
 643         params.proberesp_len = resp_len;
 644         params.dtim_period = hapd->conf->dtim_period;
 645         params.beacon_int = hapd->iconf->beacon_int;
 646         params.basic_rates = hapd->iconf->basic_rates;
 647         params.ssid = (u8 *) hapd->conf->ssid.ssid;
 648         params.ssid_len = hapd->conf->ssid.ssid_len;
 649         params.pairwise_ciphers = hapd->conf->rsn_pairwise ?
 650                 hapd->conf->rsn_pairwise : hapd->conf->wpa_pairwise;
 651         params.group_cipher = hapd->conf->wpa_group;
 652         params.key_mgmt_suites = hapd->conf->wpa_key_mgmt;
 653         params.auth_algs = hapd->conf->auth_algs;
 654         params.wpa_version = hapd->conf->wpa;
 655         params.privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
 656                 (hapd->conf->ieee802_1x &&
 657                  (hapd->conf->default_wep_key_len ||
 658                   hapd->conf->individual_wep_key_len));
 659         switch (hapd->conf->ignore_broadcast_ssid) {
 660         case 0:
 661                 params.hide_ssid = NO_SSID_HIDING;
 662                 break;
 663         case 1:
 664                 params.hide_ssid = HIDDEN_SSID_ZERO_LEN;
 665                 break;
 666         case 2:
 667                 params.hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
 668                 break;
 669         }
 670         hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp);
 671         params.beacon_ies = beacon;
 672         params.proberesp_ies = proberesp;
 673         params.assocresp_ies = assocresp;
 674         params.isolate = hapd->conf->isolate;
 675 #ifdef NEED_AP_MLME
 676         params.cts_protect = !!(ieee802_11_erp_info(hapd) &
 677                                 ERP_INFO_USE_PROTECTION);
 678         params.preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
 679                 hapd->iconf->preamble == SHORT_PREAMBLE;
 680         if (hapd->iface->current_mode &&
 681             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
 682                 params.short_slot_time =
 683                         hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
 684         else
 685                 params.short_slot_time = -1;
 686         if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
 687                 params.ht_opmode = -1;
 688         else
 689                 params.ht_opmode = hapd->iface->ht_op_mode;
 690 #endif /* NEED_AP_MLME */
 691         params.interworking = hapd->conf->interworking;
 692         if (hapd->conf->interworking &&
 693             !is_zero_ether_addr(hapd->conf->hessid))
 694                 params.hessid = hapd->conf->hessid;
 695         params.access_network_type = hapd->conf->access_network_type;
 696         params.ap_max_inactivity = hapd->conf->ap_max_inactivity;
 697         if (hostapd_drv_set_ap(hapd, &params))
 698                 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
 699         hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
 700
 701         os_free(tail);
 702         os_free(head);
 703         os_free(resp);
 704 }
 705
 706
 707 void ieee802_11_set_beacons(struct hostapd_iface *iface)
 708 {
 709         size_t i;
 710         for (i = 0; i < iface->num_bss; i++)
 711                 ieee802_11_set_beacon(iface->bss[i]);
 712 }
 713
 714
 715 /* only update beacons if started */
 716 void ieee802_11_update_beacons(struct hostapd_iface *iface)
 717 {
 718         size_t i;
 719         for (i = 0; i < iface->num_bss; i++)
 720                 if (iface->bss[i]->beacon_set_done)
 721                         ieee802_11_set_beacon(iface->bss[i]);
 722 }
 723
 724 #endif /* CONFIG_NATIVE_WINDOWS */