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 #include "hs20.h"
  37
  38
  39 #ifdef NEED_AP_MLME
  40
  41 static u8 ieee802_11_erp_info(struct hostapd_data *hapd)
  42 {
  43         u8 erp = 0;
  44
  45         if (hapd->iface->current_mode == NULL ||
  46             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
  47                 return 0;
  48
  49         if (hapd->iface->olbc)
  50                 erp |= ERP_INFO_USE_PROTECTION;
  51         if (hapd->iface->num_sta_non_erp > 0) {
  52                 erp |= ERP_INFO_NON_ERP_PRESENT |
  53                         ERP_INFO_USE_PROTECTION;
  54         }
  55         if (hapd->iface->num_sta_no_short_preamble > 0 ||
  56             hapd->iconf->preamble == LONG_PREAMBLE)
  57                 erp |= ERP_INFO_BARKER_PREAMBLE_MODE;
  58
  59         return erp;
  60 }
  61
  62
  63 static u8 * hostapd_eid_ds_params(struct hostapd_data *hapd, u8 *eid)
  64 {
  65         *eid++ = WLAN_EID_DS_PARAMS;
  66         *eid++ = 1;
  67         *eid++ = hapd->iconf->channel;
  68         return eid;
  69 }
  70
  71
  72 static u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid)
  73 {
  74         if (hapd->iface->current_mode == NULL ||
  75             hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
  76                 return eid;
  77
  78         /* Set NonERP_present and use_protection bits if there
  79          * are any associated NonERP stations. */
  80         /* TODO: use_protection bit can be set to zero even if
  81          * there are NonERP stations present. This optimization
  82          * might be useful if NonERP stations are "quiet".
  83          * See 802.11g/D6 E-1 for recommended practice.
  84          * In addition, Non ERP present might be set, if AP detects Non ERP
  85          * operation on other APs. */
  86
  87         /* Add ERP Information element */
  88         *eid++ = WLAN_EID_ERP_INFO;
  89         *eid++ = 1;
  90         *eid++ = ieee802_11_erp_info(hapd);
  91
  92         return eid;
  93 }
  94
  95
  96 static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing,
  97                                     struct hostapd_channel_data *start,
  98                                     struct hostapd_channel_data *prev)
  99 {
 100         if (end - pos < 3)
 101                 return pos;
 102
 103         /* first channel number */
 104         *pos++ = start->chan;
 105         /* number of channels */
 106         *pos++ = (prev->chan - start->chan) / chan_spacing + 1;
 107         /* maximum transmit power level */
 108         *pos++ = start->max_tx_power;
 109
 110         return pos;
 111 }
 112
 113
 114 static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
 115                                 int max_len)
 116 {
 117         u8 *pos = eid;
 118         u8 *end = eid + max_len;
 119         int i;
 120         struct hostapd_hw_modes *mode;
 121         struct hostapd_channel_data *start, *prev;
 122         int chan_spacing = 1;
 123
 124         if (!hapd->iconf->ieee80211d || max_len < 6 ||
 125             hapd->iface->current_mode == NULL)
 126                 return eid;
 127
 128         *pos++ = WLAN_EID_COUNTRY;
 129         pos++; /* length will be set later */
 130         os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */
 131         pos += 3;
 132
 133         mode = hapd->iface->current_mode;
 134         if (mode->mode == HOSTAPD_MODE_IEEE80211A)
 135                 chan_spacing = 4;
 136
 137         start = prev = NULL;
 138         for (i = 0; i < mode->num_channels; i++) {
 139                 struct hostapd_channel_data *chan = &mode->channels[i];
 140                 if (chan->flag & HOSTAPD_CHAN_DISABLED)
 141                         continue;
 142                 if (start && prev &&
 143                     prev->chan + chan_spacing == chan->chan &&
 144                     start->max_tx_power == chan->max_tx_power) {
 145                         prev = chan;
 146                         continue; /* can use same entry */
 147                 }
 148
 149                 if (start) {
 150                         pos = hostapd_eid_country_add(pos, end, chan_spacing,
 151                                                       start, prev);
 152                         start = NULL;
 153                 }
 154
 155                 /* Start new group */
 156                 start = prev = chan;
 157         }
 158
 159         if (start) {
 160                 pos = hostapd_eid_country_add(pos, end, chan_spacing,
 161                                               start, prev);
 162         }
 163
 164         if ((pos - eid) & 1) {
 165                 if (end - pos < 1)
 166                         return eid;
 167                 *pos++ = 0; /* pad for 16-bit alignment */
 168         }
 169
 170         eid[1] = (pos - eid) - 2;
 171
 172         return pos;
 173 }
 174
 175
 176 static u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len)
 177 {
 178         const u8 *ie;
 179         size_t ielen;
 180
 181         ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
 182         if (ie == NULL || ielen > len)
 183                 return eid;
 184
 185         os_memcpy(eid, ie, ielen);
 186         return eid + ielen;
 187 }
 188
 189
 190 static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
 191                                    struct sta_info *sta,
 192                                    const struct ieee80211_mgmt *req,
 193                                    int is_p2p, size_t *resp_len)
 194 {
 195         struct ieee80211_mgmt *resp;
 196         u8 *pos, *epos;
 197         size_t buflen;
 198
 199 #define MAX_PROBERESP_LEN 768
 200         buflen = MAX_PROBERESP_LEN;
 201 #ifdef CONFIG_WPS
 202         if (hapd->wps_probe_resp_ie)
 203                 buflen += wpabuf_len(hapd->wps_probe_resp_ie);
 204 #endif /* CONFIG_WPS */
 205 #ifdef CONFIG_P2P
 206         if (hapd->p2p_probe_resp_ie)
 207                 buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
 208 #endif /* CONFIG_P2P */
 209         if (hapd->conf->vendor_elements)
 210                 buflen += wpabuf_len(hapd->conf->vendor_elements);
 211         resp = os_zalloc(buflen);
 212         if (resp == NULL)
 213                 return NULL;
 214
 215         epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
 216
 217         resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 218                                            WLAN_FC_STYPE_PROBE_RESP);
 219         if (req)
 220                 os_memcpy(resp->da, req->sa, ETH_ALEN);
 221         os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
 222
 223         os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
 224         resp->u.probe_resp.beacon_int =
 225                 host_to_le16(hapd->iconf->beacon_int);
 226
 227         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 228         resp->u.probe_resp.capab_info =
 229                 host_to_le16(hostapd_own_capab_info(hapd, sta, 1));
 230
 231         pos = resp->u.probe_resp.variable;
 232         *pos++ = WLAN_EID_SSID;
 233         *pos++ = hapd->conf->ssid.ssid_len;
 234         os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
 235         pos += hapd->conf->ssid.ssid_len;
 236
 237         /* Supported rates */
 238         pos = hostapd_eid_supp_rates(hapd, pos);
 239
 240         /* DS Params */
 241         pos = hostapd_eid_ds_params(hapd, pos);
 242
 243         pos = hostapd_eid_country(hapd, pos, epos - pos);
 244
 245         /* ERP Information element */
 246         pos = hostapd_eid_erp_info(hapd, pos);
 247
 248         /* Extended supported rates */
 249         pos = hostapd_eid_ext_supp_rates(hapd, pos);
 250
 251         /* RSN, MDIE, WPA */
 252         pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 253
 254 #ifdef CONFIG_IEEE80211N
 255         pos = hostapd_eid_ht_capabilities(hapd, pos);
 256         pos = hostapd_eid_ht_operation(hapd, pos);
 257 #endif /* CONFIG_IEEE80211N */
 258
 259         pos = hostapd_eid_ext_capab(hapd, pos);
 260
 261         pos = hostapd_eid_time_adv(hapd, pos);
 262         pos = hostapd_eid_time_zone(hapd, pos);
 263
 264         pos = hostapd_eid_interworking(hapd, pos);
 265         pos = hostapd_eid_adv_proto(hapd, pos);
 266         pos = hostapd_eid_roaming_consortium(hapd, pos);
 267
 268 #ifdef CONFIG_IEEE80211AC
 269         pos = hostapd_eid_vht_capabilities(hapd, pos);
 270         pos = hostapd_eid_vht_operation(hapd, pos);
 271 #endif /* CONFIG_IEEE80211AC */
 272
 273         /* Wi-Fi Alliance WMM */
 274         pos = hostapd_eid_wmm(hapd, pos);
 275
 276 #ifdef CONFIG_WPS
 277         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
 278                 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
 279                           wpabuf_len(hapd->wps_probe_resp_ie));
 280                 pos += wpabuf_len(hapd->wps_probe_resp_ie);
 281         }
 282 #endif /* CONFIG_WPS */
 283
 284 #ifdef CONFIG_P2P
 285         if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
 286             hapd->p2p_probe_resp_ie) {
 287                 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
 288                           wpabuf_len(hapd->p2p_probe_resp_ie));
 289                 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
 290         }
 291 #endif /* CONFIG_P2P */
 292 #ifdef CONFIG_P2P_MANAGER
 293         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 294             P2P_MANAGE)
 295                 pos = hostapd_eid_p2p_manage(hapd, pos);
 296 #endif /* CONFIG_P2P_MANAGER */
 297
 298 #ifdef CONFIG_HS20
 299         pos = hostapd_eid_hs20_indication(hapd, pos);
 300 #endif /* CONFIG_HS20 */
 301
 302         if (hapd->conf->vendor_elements) {
 303                 os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
 304                           wpabuf_len(hapd->conf->vendor_elements));
 305                 pos += wpabuf_len(hapd->conf->vendor_elements);
 306         }
 307
 308         *resp_len = pos - (u8 *) resp;
 309         return (u8 *) resp;
 310 }
 311
 312
 313 void handle_probe_req(struct hostapd_data *hapd,
 314                       const struct ieee80211_mgmt *mgmt, size_t len,
 315                       int ssi_signal)
 316 {
 317         u8 *resp;
 318         struct ieee802_11_elems elems;
 319         const u8 *ie;
 320         size_t ie_len;
 321         struct sta_info *sta = NULL;
 322         size_t i, resp_len;
 323         int noack;
 324
 325         ie = mgmt->u.probe_req.variable;
 326         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
 327                 return;
 328         ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
 329
 330         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
 331                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
 332                                             mgmt->sa, mgmt->da, mgmt->bssid,
 333                                             ie, ie_len, ssi_signal) > 0)
 334                         return;
 335
 336         if (!hapd->iconf->send_probe_response)
 337                 return;
 338
 339         if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
 340                 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
 341                            MAC2STR(mgmt->sa));
 342                 return;
 343         }
 344
 345         if ((!elems.ssid || !elems.supp_rates)) {
 346                 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
 347                            "without SSID or supported rates element",
 348                            MAC2STR(mgmt->sa));
 349                 return;
 350         }
 351
 352 #ifdef CONFIG_P2P
 353         if (hapd->p2p && elems.wps_ie) {
 354                 struct wpabuf *wps;
 355                 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
 356                 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
 357                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 358                                    "due to mismatch with Requested Device "
 359                                    "Type");
 360                         wpabuf_free(wps);
 361                         return;
 362                 }
 363                 wpabuf_free(wps);
 364         }
 365
 366         if (hapd->p2p && elems.p2p) {
 367                 struct wpabuf *p2p;
 368                 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
 369                 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
 370                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 371                                    "due to mismatch with Device ID");
 372                         wpabuf_free(p2p);
 373                         return;
 374                 }
 375                 wpabuf_free(p2p);
 376         }
 377 #endif /* CONFIG_P2P */
 378
 379         if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0) {
 380                 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
 381                            "broadcast SSID ignored", MAC2STR(mgmt->sa));
 382                 return;
 383         }
 384
 385         sta = ap_get_sta(hapd, mgmt->sa);
 386
 387 #ifdef CONFIG_P2P
 388         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 389             elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
 390             os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
 391                       P2P_WILDCARD_SSID_LEN) == 0) {
 392                 /* Process P2P Wildcard SSID like Wildcard SSID */
 393                 elems.ssid_len = 0;
 394         }
 395 #endif /* CONFIG_P2P */
 396
 397         if (elems.ssid_len == 0 ||
 398             (elems.ssid_len == hapd->conf->ssid.ssid_len &&
 399              os_memcmp(elems.ssid, hapd->conf->ssid.ssid, elems.ssid_len) ==
 400              0)) {
 401                 if (sta)
 402                         sta->ssid_probe = &hapd->conf->ssid;
 403         } else {
 404                 if (!(mgmt->da[0] & 0x01)) {
 405                         char ssid_txt[33];
 406                         ieee802_11_print_ssid(ssid_txt, elems.ssid,
 407                                               elems.ssid_len);
 408                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 409                                    " for foreign SSID '%s' (DA " MACSTR ")",
 410                                    MAC2STR(mgmt->sa), ssid_txt,
 411                                    MAC2STR(mgmt->da));
 412                 }
 413                 return;
 414         }
 415
 416 #ifdef CONFIG_INTERWORKING
 417         if (elems.interworking && elems.interworking_len >= 1) {
 418                 u8 ant = elems.interworking[0] & 0x0f;
 419                 if (ant != INTERWORKING_ANT_WILDCARD &&
 420                     ant != hapd->conf->access_network_type) {
 421                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 422                                    " for mismatching ANT %u ignored",
 423                                    MAC2STR(mgmt->sa), ant);
 424                         return;
 425                 }
 426         }
 427
 428         if (elems.interworking &&
 429             (elems.interworking_len == 7 || elems.interworking_len == 9)) {
 430                 const u8 *hessid;
 431                 if (elems.interworking_len == 7)
 432                         hessid = elems.interworking + 1;
 433                 else
 434                         hessid = elems.interworking + 1 + 2;
 435                 if (!is_broadcast_ether_addr(hessid) &&
 436                     os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
 437                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 438                                    " for mismatching HESSID " MACSTR
 439                                    " ignored",
 440                                    MAC2STR(mgmt->sa), MAC2STR(hessid));
 441                         return;
 442                 }
 443         }
 444 #endif /* CONFIG_INTERWORKING */
 445
 446         /* TODO: verify that supp_rates contains at least one matching rate
 447          * with AP configuration */
 448
 449         resp = hostapd_gen_probe_resp(hapd, sta, mgmt, elems.p2p != NULL,
 450                                       &resp_len);
 451         if (resp == NULL)
 452                 return;
 453
 454         /*
 455          * If this is a broadcast probe request, apply no ack policy to avoid
 456          * excessive retries.
 457          */
 458         noack = !!(elems.ssid_len == 0 && is_broadcast_ether_addr(mgmt->da));
 459
 460         if (hostapd_drv_send_mlme(hapd, resp, resp_len, noack) < 0)
 461                 perror("handle_probe_req: send");
 462
 463         os_free(resp);
 464
 465         wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
 466                    "SSID", MAC2STR(mgmt->sa),
 467                    elems.ssid_len == 0 ? "broadcast" : "our");
 468 }
 469
 470
 471 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
 472                                         size_t *resp_len)
 473 {
 474         /* check probe response offloading caps and print warnings */
 475         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
 476                 return NULL;
 477
 478 #ifdef CONFIG_WPS
 479         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
 480             (!(hapd->iface->probe_resp_offloads &
 481                (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
 482                 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
 483                 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
 484                            "Probe Response while not supporting this");
 485 #endif /* CONFIG_WPS */
 486
 487 #ifdef CONFIG_P2P
 488         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
 489             !(hapd->iface->probe_resp_offloads &
 490               WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
 491                 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
 492                            "Probe Response while not supporting this");
 493 #endif  /* CONFIG_P2P */
 494
 495         if (hapd->conf->interworking &&
 496             !(hapd->iface->probe_resp_offloads &
 497               WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
 498                 wpa_printf(MSG_WARNING, "Device is trying to offload "
 499                            "Interworking Probe Response while not supporting "
 500                            "this");
 501
 502         /* Generate a Probe Response template for the non-P2P case */
 503         return hostapd_gen_probe_resp(hapd, NULL, NULL, 0, resp_len);
 504 }
 505
 506 #endif /* NEED_AP_MLME */
 507
 508
 509 void ieee802_11_set_beacon(struct hostapd_data *hapd)
 510 {
 511         struct ieee80211_mgmt *head = NULL;
 512         u8 *tail = NULL;
 513         size_t head_len = 0, tail_len = 0;
 514         u8 *resp = NULL;
 515         size_t resp_len = 0;
 516         struct wpa_driver_ap_params params;
 517         struct wpabuf *beacon, *proberesp, *assocresp;
 518 #ifdef NEED_AP_MLME
 519         u16 capab_info;
 520         u8 *pos, *tailpos;
 521 #endif /* NEED_AP_MLME */
 522
 523         hapd->beacon_set_done = 1;
 524
 525 #ifdef NEED_AP_MLME
 526
 527 #define BEACON_HEAD_BUF_SIZE 256
 528 #define BEACON_TAIL_BUF_SIZE 512
 529         head = os_zalloc(BEACON_HEAD_BUF_SIZE);
 530         tail_len = BEACON_TAIL_BUF_SIZE;
 531 #ifdef CONFIG_WPS
 532         if (hapd->conf->wps_state && hapd->wps_beacon_ie)
 533                 tail_len += wpabuf_len(hapd->wps_beacon_ie);
 534 #endif /* CONFIG_WPS */
 535 #ifdef CONFIG_P2P
 536         if (hapd->p2p_beacon_ie)
 537                 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
 538 #endif /* CONFIG_P2P */
 539         if (hapd->conf->vendor_elements)
 540                 tail_len += wpabuf_len(hapd->conf->vendor_elements);
 541         tailpos = tail = os_malloc(tail_len);
 542         if (head == NULL || tail == NULL) {
 543                 wpa_printf(MSG_ERROR, "Failed to set beacon data");
 544                 os_free(head);
 545                 os_free(tail);
 546                 return;
 547         }
 548
 549         head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 550                                            WLAN_FC_STYPE_BEACON);
 551         head->duration = host_to_le16(0);
 552         os_memset(head->da, 0xff, ETH_ALEN);
 553
 554         os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
 555         os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
 556         head->u.beacon.beacon_int =
 557                 host_to_le16(hapd->iconf->beacon_int);
 558
 559         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 560         capab_info = hostapd_own_capab_info(hapd, NULL, 0);
 561         head->u.beacon.capab_info = host_to_le16(capab_info);
 562         pos = &head->u.beacon.variable[0];
 563
 564         /* SSID */
 565         *pos++ = WLAN_EID_SSID;
 566         if (hapd->conf->ignore_broadcast_ssid == 2) {
 567                 /* clear the data, but keep the correct length of the SSID */
 568                 *pos++ = hapd->conf->ssid.ssid_len;
 569                 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
 570                 pos += hapd->conf->ssid.ssid_len;
 571         } else if (hapd->conf->ignore_broadcast_ssid) {
 572                 *pos++ = 0; /* empty SSID */
 573         } else {
 574                 *pos++ = hapd->conf->ssid.ssid_len;
 575                 os_memcpy(pos, hapd->conf->ssid.ssid,
 576                           hapd->conf->ssid.ssid_len);
 577                 pos += hapd->conf->ssid.ssid_len;
 578         }
 579
 580         /* Supported rates */
 581         pos = hostapd_eid_supp_rates(hapd, pos);
 582
 583         /* DS Params */
 584         pos = hostapd_eid_ds_params(hapd, pos);
 585
 586         head_len = pos - (u8 *) head;
 587
 588         tailpos = hostapd_eid_country(hapd, tailpos,
 589                                       tail + BEACON_TAIL_BUF_SIZE - tailpos);
 590
 591         /* ERP Information element */
 592         tailpos = hostapd_eid_erp_info(hapd, tailpos);
 593
 594         /* Extended supported rates */
 595         tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
 596
 597         /* RSN, MDIE, WPA */
 598         tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
 599                                   tailpos);
 600
 601 #ifdef CONFIG_IEEE80211N
 602         tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
 603         tailpos = hostapd_eid_ht_operation(hapd, tailpos);
 604 #endif /* CONFIG_IEEE80211N */
 605
 606         tailpos = hostapd_eid_ext_capab(hapd, tailpos);
 607
 608         /*
 609          * TODO: Time Advertisement element should only be included in some
 610          * DTIM Beacon frames.
 611          */
 612         tailpos = hostapd_eid_time_adv(hapd, tailpos);
 613
 614         tailpos = hostapd_eid_interworking(hapd, tailpos);
 615         tailpos = hostapd_eid_adv_proto(hapd, tailpos);
 616         tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
 617
 618 #ifdef CONFIG_IEEE80211AC
 619         tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
 620         tailpos = hostapd_eid_vht_operation(hapd, tailpos);
 621 #endif /* CONFIG_IEEE80211AC */
 622
 623         /* Wi-Fi Alliance WMM */
 624         tailpos = hostapd_eid_wmm(hapd, tailpos);
 625
 626 #ifdef CONFIG_WPS
 627         if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
 628                 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
 629                           wpabuf_len(hapd->wps_beacon_ie));
 630                 tailpos += wpabuf_len(hapd->wps_beacon_ie);
 631         }
 632 #endif /* CONFIG_WPS */
 633
 634 #ifdef CONFIG_P2P
 635         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
 636                 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
 637                           wpabuf_len(hapd->p2p_beacon_ie));
 638                 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
 639         }
 640 #endif /* CONFIG_P2P */
 641 #ifdef CONFIG_P2P_MANAGER
 642         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 643             P2P_MANAGE)
 644                 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
 645 #endif /* CONFIG_P2P_MANAGER */
 646
 647 #ifdef CONFIG_HS20
 648         tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
 649 #endif /* CONFIG_HS20 */
 650
 651         if (hapd->conf->vendor_elements) {
 652                 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),
 653                           wpabuf_len(hapd->conf->vendor_elements));
 654                 tailpos += wpabuf_len(hapd->conf->vendor_elements);
 655         }
 656
 657         tail_len = tailpos > tail ? tailpos - tail : 0;
 658
 659         resp = hostapd_probe_resp_offloads(hapd, &resp_len);
 660 #endif /* NEED_AP_MLME */
 661
 662         os_memset(&params, 0, sizeof(params));
 663         params.head = (u8 *) head;
 664         params.head_len = head_len;
 665         params.tail = tail;
 666         params.tail_len = tail_len;
 667         params.proberesp = resp;
 668         params.proberesp_len = resp_len;
 669         params.dtim_period = hapd->conf->dtim_period;
 670         params.beacon_int = hapd->iconf->beacon_int;
 671         params.basic_rates = hapd->iface->basic_rates;
 672         params.ssid = hapd->conf->ssid.ssid;
 673         params.ssid_len = hapd->conf->ssid.ssid_len;
 674         params.pairwise_ciphers = hapd->conf->rsn_pairwise ?
 675                 hapd->conf->rsn_pairwise : hapd->conf->wpa_pairwise;
 676         params.group_cipher = hapd->conf->wpa_group;
 677         params.key_mgmt_suites = hapd->conf->wpa_key_mgmt;
 678         params.auth_algs = hapd->conf->auth_algs;
 679         params.wpa_version = hapd->conf->wpa;
 680         params.privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
 681                 (hapd->conf->ieee802_1x &&
 682                  (hapd->conf->default_wep_key_len ||
 683                   hapd->conf->individual_wep_key_len));
 684         switch (hapd->conf->ignore_broadcast_ssid) {
 685         case 0:
 686                 params.hide_ssid = NO_SSID_HIDING;
 687                 break;
 688         case 1:
 689                 params.hide_ssid = HIDDEN_SSID_ZERO_LEN;
 690                 break;
 691         case 2:
 692                 params.hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
 693                 break;
 694         }
 695         hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp);
 696         params.beacon_ies = beacon;
 697         params.proberesp_ies = proberesp;
 698         params.assocresp_ies = assocresp;
 699         params.isolate = hapd->conf->isolate;
 700 #ifdef NEED_AP_MLME
 701         params.cts_protect = !!(ieee802_11_erp_info(hapd) &
 702                                 ERP_INFO_USE_PROTECTION);
 703         params.preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
 704                 hapd->iconf->preamble == SHORT_PREAMBLE;
 705         if (hapd->iface->current_mode &&
 706             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
 707                 params.short_slot_time =
 708                         hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
 709         else
 710                 params.short_slot_time = -1;
 711         if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
 712                 params.ht_opmode = -1;
 713         else
 714                 params.ht_opmode = hapd->iface->ht_op_mode;
 715 #endif /* NEED_AP_MLME */
 716         params.interworking = hapd->conf->interworking;
 717         if (hapd->conf->interworking &&
 718             !is_zero_ether_addr(hapd->conf->hessid))
 719                 params.hessid = hapd->conf->hessid;
 720         params.access_network_type = hapd->conf->access_network_type;
 721         params.ap_max_inactivity = hapd->conf->ap_max_inactivity;
 722 #ifdef CONFIG_HS20
 723         params.disable_dgaf = hapd->conf->disable_dgaf;
 724 #endif /* CONFIG_HS20 */
 725         if (hostapd_drv_set_ap(hapd, &params))
 726                 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
 727         hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
 728
 729         os_free(tail);
 730         os_free(head);
 731         os_free(resp);
 732 }
 733
 734
 735 void ieee802_11_set_beacons(struct hostapd_iface *iface)
 736 {
 737         size_t i;
 738         for (i = 0; i < iface->num_bss; i++)
 739                 ieee802_11_set_beacon(iface->bss[i]);
 740 }
 741
 742
 743 /* only update beacons if started */
 744 void ieee802_11_update_beacons(struct hostapd_iface *iface)
 745 {
 746         size_t i;
 747         for (i = 0; i < iface->num_bss; i++)
 748                 if (iface->bss[i]->beacon_set_done)
 749                         ieee802_11_set_beacon(iface->bss[i]);
 750 }
 751
 752 #endif /* CONFIG_NATIVE_WINDOWS */