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         resp = os_zalloc(buflen);
 210         if (resp == NULL)
 211                 return NULL;
 212
 213         epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
 214
 215         resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 216                                            WLAN_FC_STYPE_PROBE_RESP);
 217         if (req)
 218                 os_memcpy(resp->da, req->sa, ETH_ALEN);
 219         os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
 220
 221         os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
 222         resp->u.probe_resp.beacon_int =
 223                 host_to_le16(hapd->iconf->beacon_int);
 224
 225         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 226         resp->u.probe_resp.capab_info =
 227                 host_to_le16(hostapd_own_capab_info(hapd, sta, 1));
 228
 229         pos = resp->u.probe_resp.variable;
 230         *pos++ = WLAN_EID_SSID;
 231         *pos++ = hapd->conf->ssid.ssid_len;
 232         os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
 233         pos += hapd->conf->ssid.ssid_len;
 234
 235         /* Supported rates */
 236         pos = hostapd_eid_supp_rates(hapd, pos);
 237
 238         /* DS Params */
 239         pos = hostapd_eid_ds_params(hapd, pos);
 240
 241         pos = hostapd_eid_country(hapd, pos, epos - pos);
 242
 243         /* ERP Information element */
 244         pos = hostapd_eid_erp_info(hapd, pos);
 245
 246         /* Extended supported rates */
 247         pos = hostapd_eid_ext_supp_rates(hapd, pos);
 248
 249         /* RSN, MDIE, WPA */
 250         pos = hostapd_eid_wpa(hapd, pos, epos - pos);
 251
 252 #ifdef CONFIG_IEEE80211N
 253         pos = hostapd_eid_ht_capabilities(hapd, pos);
 254         pos = hostapd_eid_ht_operation(hapd, pos);
 255 #endif /* CONFIG_IEEE80211N */
 256
 257         pos = hostapd_eid_ext_capab(hapd, pos);
 258
 259         pos = hostapd_eid_time_adv(hapd, pos);
 260         pos = hostapd_eid_time_zone(hapd, pos);
 261
 262         pos = hostapd_eid_interworking(hapd, pos);
 263         pos = hostapd_eid_adv_proto(hapd, pos);
 264         pos = hostapd_eid_roaming_consortium(hapd, pos);
 265
 266 #ifdef CONFIG_IEEE80211AC
 267         pos = hostapd_eid_vht_capabilities(hapd, pos);
 268         pos = hostapd_eid_vht_operation(hapd, pos);
 269 #endif /* CONFIG_IEEE80211AC */
 270
 271         /* Wi-Fi Alliance WMM */
 272         pos = hostapd_eid_wmm(hapd, pos);
 273
 274 #ifdef CONFIG_WPS
 275         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
 276                 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
 277                           wpabuf_len(hapd->wps_probe_resp_ie));
 278                 pos += wpabuf_len(hapd->wps_probe_resp_ie);
 279         }
 280 #endif /* CONFIG_WPS */
 281
 282 #ifdef CONFIG_P2P
 283         if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
 284             hapd->p2p_probe_resp_ie) {
 285                 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
 286                           wpabuf_len(hapd->p2p_probe_resp_ie));
 287                 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
 288         }
 289 #endif /* CONFIG_P2P */
 290 #ifdef CONFIG_P2P_MANAGER
 291         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 292             P2P_MANAGE)
 293                 pos = hostapd_eid_p2p_manage(hapd, pos);
 294 #endif /* CONFIG_P2P_MANAGER */
 295
 296 #ifdef CONFIG_HS20
 297         pos = hostapd_eid_hs20_indication(hapd, pos);
 298 #endif /* CONFIG_HS20 */
 299
 300         *resp_len = pos - (u8 *) resp;
 301         return (u8 *) resp;
 302 }
 303
 304
 305 void handle_probe_req(struct hostapd_data *hapd,
 306                       const struct ieee80211_mgmt *mgmt, size_t len,
 307                       int ssi_signal)
 308 {
 309         u8 *resp;
 310         struct ieee802_11_elems elems;
 311         const u8 *ie;
 312         size_t ie_len;
 313         struct sta_info *sta = NULL;
 314         size_t i, resp_len;
 315         int noack;
 316
 317         ie = mgmt->u.probe_req.variable;
 318         if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
 319                 return;
 320         ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
 321
 322         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
 323                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
 324                                             mgmt->sa, mgmt->da, mgmt->bssid,
 325                                             ie, ie_len, ssi_signal) > 0)
 326                         return;
 327
 328         if (!hapd->iconf->send_probe_response)
 329                 return;
 330
 331         if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
 332                 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
 333                            MAC2STR(mgmt->sa));
 334                 return;
 335         }
 336
 337         if ((!elems.ssid || !elems.supp_rates)) {
 338                 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
 339                            "without SSID or supported rates element",
 340                            MAC2STR(mgmt->sa));
 341                 return;
 342         }
 343
 344 #ifdef CONFIG_P2P
 345         if (hapd->p2p && elems.wps_ie) {
 346                 struct wpabuf *wps;
 347                 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
 348                 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
 349                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 350                                    "due to mismatch with Requested Device "
 351                                    "Type");
 352                         wpabuf_free(wps);
 353                         return;
 354                 }
 355                 wpabuf_free(wps);
 356         }
 357
 358         if (hapd->p2p && elems.p2p) {
 359                 struct wpabuf *p2p;
 360                 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
 361                 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
 362                         wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
 363                                    "due to mismatch with Device ID");
 364                         wpabuf_free(p2p);
 365                         return;
 366                 }
 367                 wpabuf_free(p2p);
 368         }
 369 #endif /* CONFIG_P2P */
 370
 371         if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0) {
 372                 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
 373                            "broadcast SSID ignored", MAC2STR(mgmt->sa));
 374                 return;
 375         }
 376
 377         sta = ap_get_sta(hapd, mgmt->sa);
 378
 379 #ifdef CONFIG_P2P
 380         if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
 381             elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
 382             os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
 383                       P2P_WILDCARD_SSID_LEN) == 0) {
 384                 /* Process P2P Wildcard SSID like Wildcard SSID */
 385                 elems.ssid_len = 0;
 386         }
 387 #endif /* CONFIG_P2P */
 388
 389         if (elems.ssid_len == 0 ||
 390             (elems.ssid_len == hapd->conf->ssid.ssid_len &&
 391              os_memcmp(elems.ssid, hapd->conf->ssid.ssid, elems.ssid_len) ==
 392              0)) {
 393                 if (sta)
 394                         sta->ssid_probe = &hapd->conf->ssid;
 395         } else {
 396                 if (!(mgmt->da[0] & 0x01)) {
 397                         char ssid_txt[33];
 398                         ieee802_11_print_ssid(ssid_txt, elems.ssid,
 399                                               elems.ssid_len);
 400                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 401                                    " for foreign SSID '%s' (DA " MACSTR ")",
 402                                    MAC2STR(mgmt->sa), ssid_txt,
 403                                    MAC2STR(mgmt->da));
 404                 }
 405                 return;
 406         }
 407
 408 #ifdef CONFIG_INTERWORKING
 409         if (elems.interworking && elems.interworking_len >= 1) {
 410                 u8 ant = elems.interworking[0] & 0x0f;
 411                 if (ant != INTERWORKING_ANT_WILDCARD &&
 412                     ant != hapd->conf->access_network_type) {
 413                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 414                                    " for mismatching ANT %u ignored",
 415                                    MAC2STR(mgmt->sa), ant);
 416                         return;
 417                 }
 418         }
 419
 420         if (elems.interworking &&
 421             (elems.interworking_len == 7 || elems.interworking_len == 9)) {
 422                 const u8 *hessid;
 423                 if (elems.interworking_len == 7)
 424                         hessid = elems.interworking + 1;
 425                 else
 426                         hessid = elems.interworking + 1 + 2;
 427                 if (!is_broadcast_ether_addr(hessid) &&
 428                     os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
 429                         wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
 430                                    " for mismatching HESSID " MACSTR
 431                                    " ignored",
 432                                    MAC2STR(mgmt->sa), MAC2STR(hessid));
 433                         return;
 434                 }
 435         }
 436 #endif /* CONFIG_INTERWORKING */
 437
 438         /* TODO: verify that supp_rates contains at least one matching rate
 439          * with AP configuration */
 440
 441         resp = hostapd_gen_probe_resp(hapd, sta, mgmt, elems.p2p != NULL,
 442                                       &resp_len);
 443         if (resp == NULL)
 444                 return;
 445
 446         /*
 447          * If this is a broadcast probe request, apply no ack policy to avoid
 448          * excessive retries.
 449          */
 450         noack = !!(elems.ssid_len == 0 && is_broadcast_ether_addr(mgmt->da));
 451
 452         if (hostapd_drv_send_mlme(hapd, resp, resp_len, noack) < 0)
 453                 perror("handle_probe_req: send");
 454
 455         os_free(resp);
 456
 457         wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
 458                    "SSID", MAC2STR(mgmt->sa),
 459                    elems.ssid_len == 0 ? "broadcast" : "our");
 460 }
 461
 462
 463 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
 464                                         size_t *resp_len)
 465 {
 466         /* check probe response offloading caps and print warnings */
 467         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
 468                 return NULL;
 469
 470 #ifdef CONFIG_WPS
 471         if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
 472             (!(hapd->iface->probe_resp_offloads &
 473                (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
 474                 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
 475                 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
 476                            "Probe Response while not supporting this");
 477 #endif /* CONFIG_WPS */
 478
 479 #ifdef CONFIG_P2P
 480         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
 481             !(hapd->iface->probe_resp_offloads &
 482               WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
 483                 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
 484                            "Probe Response while not supporting this");
 485 #endif  /* CONFIG_P2P */
 486
 487         if (hapd->conf->interworking &&
 488             !(hapd->iface->probe_resp_offloads &
 489               WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
 490                 wpa_printf(MSG_WARNING, "Device is trying to offload "
 491                            "Interworking Probe Response while not supporting "
 492                            "this");
 493
 494         /* Generate a Probe Response template for the non-P2P case */
 495         return hostapd_gen_probe_resp(hapd, NULL, NULL, 0, resp_len);
 496 }
 497
 498 #endif /* NEED_AP_MLME */
 499
 500
 501 void ieee802_11_set_beacon(struct hostapd_data *hapd)
 502 {
 503         struct ieee80211_mgmt *head = NULL;
 504         u8 *tail = NULL;
 505         size_t head_len = 0, tail_len = 0;
 506         u8 *resp = NULL;
 507         size_t resp_len = 0;
 508         struct wpa_driver_ap_params params;
 509         struct wpabuf *beacon, *proberesp, *assocresp;
 510 #ifdef NEED_AP_MLME
 511         u16 capab_info;
 512         u8 *pos, *tailpos;
 513 #endif /* NEED_AP_MLME */
 514
 515         hapd->beacon_set_done = 1;
 516
 517 #ifdef NEED_AP_MLME
 518
 519 #define BEACON_HEAD_BUF_SIZE 256
 520 #define BEACON_TAIL_BUF_SIZE 512
 521         head = os_zalloc(BEACON_HEAD_BUF_SIZE);
 522         tail_len = BEACON_TAIL_BUF_SIZE;
 523 #ifdef CONFIG_WPS
 524         if (hapd->conf->wps_state && hapd->wps_beacon_ie)
 525                 tail_len += wpabuf_len(hapd->wps_beacon_ie);
 526 #endif /* CONFIG_WPS */
 527 #ifdef CONFIG_P2P
 528         if (hapd->p2p_beacon_ie)
 529                 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
 530 #endif /* CONFIG_P2P */
 531         tailpos = tail = os_malloc(tail_len);
 532         if (head == NULL || tail == NULL) {
 533                 wpa_printf(MSG_ERROR, "Failed to set beacon data");
 534                 os_free(head);
 535                 os_free(tail);
 536                 return;
 537         }
 538
 539         head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 540                                            WLAN_FC_STYPE_BEACON);
 541         head->duration = host_to_le16(0);
 542         os_memset(head->da, 0xff, ETH_ALEN);
 543
 544         os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
 545         os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
 546         head->u.beacon.beacon_int =
 547                 host_to_le16(hapd->iconf->beacon_int);
 548
 549         /* hardware or low-level driver will setup seq_ctrl and timestamp */
 550         capab_info = hostapd_own_capab_info(hapd, NULL, 0);
 551         head->u.beacon.capab_info = host_to_le16(capab_info);
 552         pos = &head->u.beacon.variable[0];
 553
 554         /* SSID */
 555         *pos++ = WLAN_EID_SSID;
 556         if (hapd->conf->ignore_broadcast_ssid == 2) {
 557                 /* clear the data, but keep the correct length of the SSID */
 558                 *pos++ = hapd->conf->ssid.ssid_len;
 559                 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
 560                 pos += hapd->conf->ssid.ssid_len;
 561         } else if (hapd->conf->ignore_broadcast_ssid) {
 562                 *pos++ = 0; /* empty SSID */
 563         } else {
 564                 *pos++ = hapd->conf->ssid.ssid_len;
 565                 os_memcpy(pos, hapd->conf->ssid.ssid,
 566                           hapd->conf->ssid.ssid_len);
 567                 pos += hapd->conf->ssid.ssid_len;
 568         }
 569
 570         /* Supported rates */
 571         pos = hostapd_eid_supp_rates(hapd, pos);
 572
 573         /* DS Params */
 574         pos = hostapd_eid_ds_params(hapd, pos);
 575
 576         head_len = pos - (u8 *) head;
 577
 578         tailpos = hostapd_eid_country(hapd, tailpos,
 579                                       tail + BEACON_TAIL_BUF_SIZE - tailpos);
 580
 581         /* ERP Information element */
 582         tailpos = hostapd_eid_erp_info(hapd, tailpos);
 583
 584         /* Extended supported rates */
 585         tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
 586
 587         /* RSN, MDIE, WPA */
 588         tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
 589                                   tailpos);
 590
 591 #ifdef CONFIG_IEEE80211N
 592         tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
 593         tailpos = hostapd_eid_ht_operation(hapd, tailpos);
 594 #endif /* CONFIG_IEEE80211N */
 595
 596         tailpos = hostapd_eid_ext_capab(hapd, tailpos);
 597
 598         /*
 599          * TODO: Time Advertisement element should only be included in some
 600          * DTIM Beacon frames.
 601          */
 602         tailpos = hostapd_eid_time_adv(hapd, tailpos);
 603
 604         tailpos = hostapd_eid_interworking(hapd, tailpos);
 605         tailpos = hostapd_eid_adv_proto(hapd, tailpos);
 606         tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
 607
 608 #ifdef CONFIG_IEEE80211AC
 609         tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
 610         tailpos = hostapd_eid_vht_operation(hapd, tailpos);
 611 #endif /* CONFIG_IEEE80211AC */
 612
 613         /* Wi-Fi Alliance WMM */
 614         tailpos = hostapd_eid_wmm(hapd, tailpos);
 615
 616 #ifdef CONFIG_WPS
 617         if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
 618                 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
 619                           wpabuf_len(hapd->wps_beacon_ie));
 620                 tailpos += wpabuf_len(hapd->wps_beacon_ie);
 621         }
 622 #endif /* CONFIG_WPS */
 623
 624 #ifdef CONFIG_P2P
 625         if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
 626                 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
 627                           wpabuf_len(hapd->p2p_beacon_ie));
 628                 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
 629         }
 630 #endif /* CONFIG_P2P */
 631 #ifdef CONFIG_P2P_MANAGER
 632         if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
 633             P2P_MANAGE)
 634                 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
 635 #endif /* CONFIG_P2P_MANAGER */
 636
 637 #ifdef CONFIG_HS20
 638         tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
 639 #endif /* CONFIG_HS20 */
 640
 641         tail_len = tailpos > tail ? tailpos - tail : 0;
 642
 643         resp = hostapd_probe_resp_offloads(hapd, &resp_len);
 644 #endif /* NEED_AP_MLME */
 645
 646         os_memset(&params, 0, sizeof(params));
 647         params.head = (u8 *) head;
 648         params.head_len = head_len;
 649         params.tail = tail;
 650         params.tail_len = tail_len;
 651         params.proberesp = resp;
 652         params.proberesp_len = resp_len;
 653         params.dtim_period = hapd->conf->dtim_period;
 654         params.beacon_int = hapd->iconf->beacon_int;
 655         params.basic_rates = hapd->iconf->basic_rates;
 656         params.ssid = (u8 *) hapd->conf->ssid.ssid;
 657         params.ssid_len = hapd->conf->ssid.ssid_len;
 658         params.pairwise_ciphers = hapd->conf->rsn_pairwise ?
 659                 hapd->conf->rsn_pairwise : hapd->conf->wpa_pairwise;
 660         params.group_cipher = hapd->conf->wpa_group;
 661         params.key_mgmt_suites = hapd->conf->wpa_key_mgmt;
 662         params.auth_algs = hapd->conf->auth_algs;
 663         params.wpa_version = hapd->conf->wpa;
 664         params.privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
 665                 (hapd->conf->ieee802_1x &&
 666                  (hapd->conf->default_wep_key_len ||
 667                   hapd->conf->individual_wep_key_len));
 668         switch (hapd->conf->ignore_broadcast_ssid) {
 669         case 0:
 670                 params.hide_ssid = NO_SSID_HIDING;
 671                 break;
 672         case 1:
 673                 params.hide_ssid = HIDDEN_SSID_ZERO_LEN;
 674                 break;
 675         case 2:
 676                 params.hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
 677                 break;
 678         }
 679         hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp);
 680         params.beacon_ies = beacon;
 681         params.proberesp_ies = proberesp;
 682         params.assocresp_ies = assocresp;
 683         params.isolate = hapd->conf->isolate;
 684 #ifdef NEED_AP_MLME
 685         params.cts_protect = !!(ieee802_11_erp_info(hapd) &
 686                                 ERP_INFO_USE_PROTECTION);
 687         params.preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
 688                 hapd->iconf->preamble == SHORT_PREAMBLE;
 689         if (hapd->iface->current_mode &&
 690             hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
 691                 params.short_slot_time =
 692                         hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
 693         else
 694                 params.short_slot_time = -1;
 695         if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
 696                 params.ht_opmode = -1;
 697         else
 698                 params.ht_opmode = hapd->iface->ht_op_mode;
 699 #endif /* NEED_AP_MLME */
 700         params.interworking = hapd->conf->interworking;
 701         if (hapd->conf->interworking &&
 702             !is_zero_ether_addr(hapd->conf->hessid))
 703                 params.hessid = hapd->conf->hessid;
 704         params.access_network_type = hapd->conf->access_network_type;
 705         params.ap_max_inactivity = hapd->conf->ap_max_inactivity;
 706 #ifdef CONFIG_HS20
 707         params.disable_dgaf = hapd->conf->disable_dgaf;
 708 #endif /* CONFIG_HS20 */
 709         if (hostapd_drv_set_ap(hapd, &params))
 710                 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
 711         hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
 712
 713         os_free(tail);
 714         os_free(head);
 715         os_free(resp);
 716 }
 717
 718
 719 void ieee802_11_set_beacons(struct hostapd_iface *iface)
 720 {
 721         size_t i;
 722         for (i = 0; i < iface->num_bss; i++)
 723                 ieee802_11_set_beacon(iface->bss[i]);
 724 }
 725
 726
 727 /* only update beacons if started */
 728 void ieee802_11_update_beacons(struct hostapd_iface *iface)
 729 {
 730         size_t i;
 731         for (i = 0; i < iface->num_bss; i++)
 732                 if (iface->bss[i]->beacon_set_done)
 733                         ieee802_11_set_beacon(iface->bss[i]);
 734 }
 735
 736 #endif /* CONFIG_NATIVE_WINDOWS */