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