beacon.c revision 34af306c42b7ccf956508e7cd23f0ba90606e360
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) 2008-2012, 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 41static 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 63static 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 72static 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 96static 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 114static 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 176static 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 190static 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 313enum ssid_match_result { 314 NO_SSID_MATCH, 315 EXACT_SSID_MATCH, 316 WILDCARD_SSID_MATCH 317}; 318 319static enum ssid_match_result ssid_match(struct hostapd_data *hapd, 320 const u8 *ssid, size_t ssid_len, 321 const u8 *ssid_list, 322 size_t ssid_list_len) 323{ 324 const u8 *pos, *end; 325 int wildcard = 0; 326 327 if (ssid_len == 0) 328 wildcard = 1; 329 if (ssid_len == hapd->conf->ssid.ssid_len && 330 os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0) 331 return EXACT_SSID_MATCH; 332 333 if (ssid_list == NULL) 334 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH; 335 336 pos = ssid_list; 337 end = ssid_list + ssid_list_len; 338 while (pos + 1 <= end) { 339 if (pos + 2 + pos[1] > end) 340 break; 341 if (pos[1] == 0) 342 wildcard = 1; 343 if (pos[1] == hapd->conf->ssid.ssid_len && 344 os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0) 345 return EXACT_SSID_MATCH; 346 pos += 2 + pos[1]; 347 } 348 349 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH; 350} 351 352 353void handle_probe_req(struct hostapd_data *hapd, 354 const struct ieee80211_mgmt *mgmt, size_t len, 355 int ssi_signal) 356{ 357 u8 *resp; 358 struct ieee802_11_elems elems; 359 const u8 *ie; 360 size_t ie_len; 361 struct sta_info *sta = NULL; 362 size_t i, resp_len; 363 int noack; 364 enum ssid_match_result res; 365 366 ie = mgmt->u.probe_req.variable; 367 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req)) 368 return; 369 ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req)); 370 371 for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++) 372 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx, 373 mgmt->sa, mgmt->da, mgmt->bssid, 374 ie, ie_len, ssi_signal) > 0) 375 return; 376 377 if (!hapd->iconf->send_probe_response) 378 return; 379 380 if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) { 381 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR, 382 MAC2STR(mgmt->sa)); 383 return; 384 } 385 386 if ((!elems.ssid || !elems.supp_rates)) { 387 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request " 388 "without SSID or supported rates element", 389 MAC2STR(mgmt->sa)); 390 return; 391 } 392 393#ifdef CONFIG_P2P 394 if (hapd->p2p && elems.wps_ie) { 395 struct wpabuf *wps; 396 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA); 397 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) { 398 wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request " 399 "due to mismatch with Requested Device " 400 "Type"); 401 wpabuf_free(wps); 402 return; 403 } 404 wpabuf_free(wps); 405 } 406 407 if (hapd->p2p && elems.p2p) { 408 struct wpabuf *p2p; 409 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE); 410 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) { 411 wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request " 412 "due to mismatch with Device ID"); 413 wpabuf_free(p2p); 414 return; 415 } 416 wpabuf_free(p2p); 417 } 418#endif /* CONFIG_P2P */ 419 420 if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 && 421 elems.ssid_list_len == 0) { 422 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for " 423 "broadcast SSID ignored", MAC2STR(mgmt->sa)); 424 return; 425 } 426 427 sta = ap_get_sta(hapd, mgmt->sa); 428 429#ifdef CONFIG_P2P 430 if ((hapd->conf->p2p & P2P_GROUP_OWNER) && 431 elems.ssid_len == P2P_WILDCARD_SSID_LEN && 432 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, 433 P2P_WILDCARD_SSID_LEN) == 0) { 434 /* Process P2P Wildcard SSID like Wildcard SSID */ 435 elems.ssid_len = 0; 436 } 437#endif /* CONFIG_P2P */ 438 439 res = ssid_match(hapd, elems.ssid, elems.ssid_len, 440 elems.ssid_list, elems.ssid_list_len); 441 if (res != NO_SSID_MATCH) { 442 if (sta) 443 sta->ssid_probe = &hapd->conf->ssid; 444 } else { 445 if (!(mgmt->da[0] & 0x01)) { 446 char ssid_txt[33]; 447 ieee802_11_print_ssid(ssid_txt, elems.ssid, 448 elems.ssid_len); 449 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR 450 " for foreign SSID '%s' (DA " MACSTR ")%s", 451 MAC2STR(mgmt->sa), ssid_txt, 452 MAC2STR(mgmt->da), 453 elems.ssid_list ? " (SSID list)" : ""); 454 } 455 return; 456 } 457 458#ifdef CONFIG_INTERWORKING 459 if (elems.interworking && elems.interworking_len >= 1) { 460 u8 ant = elems.interworking[0] & 0x0f; 461 if (ant != INTERWORKING_ANT_WILDCARD && 462 ant != hapd->conf->access_network_type) { 463 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR 464 " for mismatching ANT %u ignored", 465 MAC2STR(mgmt->sa), ant); 466 return; 467 } 468 } 469 470 if (elems.interworking && 471 (elems.interworking_len == 7 || elems.interworking_len == 9)) { 472 const u8 *hessid; 473 if (elems.interworking_len == 7) 474 hessid = elems.interworking + 1; 475 else 476 hessid = elems.interworking + 1 + 2; 477 if (!is_broadcast_ether_addr(hessid) && 478 os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) { 479 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR 480 " for mismatching HESSID " MACSTR 481 " ignored", 482 MAC2STR(mgmt->sa), MAC2STR(hessid)); 483 return; 484 } 485 } 486#endif /* CONFIG_INTERWORKING */ 487 488#ifdef CONFIG_P2P 489 if ((hapd->conf->p2p & P2P_GROUP_OWNER) && 490 supp_rates_11b_only(&elems)) { 491 /* Indicates support for 11b rates only */ 492 wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from " 493 MACSTR " with only 802.11b rates", 494 MAC2STR(mgmt->sa)); 495 return; 496 } 497#endif /* CONFIG_P2P */ 498 499 /* TODO: verify that supp_rates contains at least one matching rate 500 * with AP configuration */ 501 502#ifdef CONFIG_TESTING_OPTIONS 503 if (hapd->iconf->ignore_probe_probability > 0.0d && 504 drand48() < hapd->iconf->ignore_probe_probability) { 505 wpa_printf(MSG_INFO, 506 "TESTING: ignoring probe request from " MACSTR, 507 MAC2STR(mgmt->sa)); 508 return; 509 } 510#endif /* CONFIG_TESTING_OPTIONS */ 511 512 resp = hostapd_gen_probe_resp(hapd, sta, mgmt, elems.p2p != NULL, 513 &resp_len); 514 if (resp == NULL) 515 return; 516 517 /* 518 * If this is a broadcast probe request, apply no ack policy to avoid 519 * excessive retries. 520 */ 521 noack = !!(res == WILDCARD_SSID_MATCH && 522 is_broadcast_ether_addr(mgmt->da)); 523 524 if (hostapd_drv_send_mlme(hapd, resp, resp_len, noack) < 0) 525 perror("handle_probe_req: send"); 526 527 os_free(resp); 528 529 wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s " 530 "SSID", MAC2STR(mgmt->sa), 531 elems.ssid_len == 0 ? "broadcast" : "our"); 532} 533 534 535static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd, 536 size_t *resp_len) 537{ 538 /* check probe response offloading caps and print warnings */ 539 if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD)) 540 return NULL; 541 542#ifdef CONFIG_WPS 543 if (hapd->conf->wps_state && hapd->wps_probe_resp_ie && 544 (!(hapd->iface->probe_resp_offloads & 545 (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS | 546 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2)))) 547 wpa_printf(MSG_WARNING, "Device is trying to offload WPS " 548 "Probe Response while not supporting this"); 549#endif /* CONFIG_WPS */ 550 551#ifdef CONFIG_P2P 552 if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie && 553 !(hapd->iface->probe_resp_offloads & 554 WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P)) 555 wpa_printf(MSG_WARNING, "Device is trying to offload P2P " 556 "Probe Response while not supporting this"); 557#endif /* CONFIG_P2P */ 558 559 if (hapd->conf->interworking && 560 !(hapd->iface->probe_resp_offloads & 561 WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING)) 562 wpa_printf(MSG_WARNING, "Device is trying to offload " 563 "Interworking Probe Response while not supporting " 564 "this"); 565 566 /* Generate a Probe Response template for the non-P2P case */ 567 return hostapd_gen_probe_resp(hapd, NULL, NULL, 0, resp_len); 568} 569 570#endif /* NEED_AP_MLME */ 571 572 573void ieee802_11_set_beacon(struct hostapd_data *hapd) 574{ 575 struct ieee80211_mgmt *head = NULL; 576 u8 *tail = NULL; 577 size_t head_len = 0, tail_len = 0; 578 u8 *resp = NULL; 579 size_t resp_len = 0; 580 struct wpa_driver_ap_params params; 581 struct wpabuf *beacon, *proberesp, *assocresp; 582#ifdef NEED_AP_MLME 583 u16 capab_info; 584 u8 *pos, *tailpos; 585#endif /* NEED_AP_MLME */ 586 587 hapd->beacon_set_done = 1; 588 589#ifdef NEED_AP_MLME 590 591#define BEACON_HEAD_BUF_SIZE 256 592#define BEACON_TAIL_BUF_SIZE 512 593 head = os_zalloc(BEACON_HEAD_BUF_SIZE); 594 tail_len = BEACON_TAIL_BUF_SIZE; 595#ifdef CONFIG_WPS 596 if (hapd->conf->wps_state && hapd->wps_beacon_ie) 597 tail_len += wpabuf_len(hapd->wps_beacon_ie); 598#endif /* CONFIG_WPS */ 599#ifdef CONFIG_P2P 600 if (hapd->p2p_beacon_ie) 601 tail_len += wpabuf_len(hapd->p2p_beacon_ie); 602#endif /* CONFIG_P2P */ 603 if (hapd->conf->vendor_elements) 604 tail_len += wpabuf_len(hapd->conf->vendor_elements); 605 tailpos = tail = os_malloc(tail_len); 606 if (head == NULL || tail == NULL) { 607 wpa_printf(MSG_ERROR, "Failed to set beacon data"); 608 os_free(head); 609 os_free(tail); 610 return; 611 } 612 613 head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 614 WLAN_FC_STYPE_BEACON); 615 head->duration = host_to_le16(0); 616 os_memset(head->da, 0xff, ETH_ALEN); 617 618 os_memcpy(head->sa, hapd->own_addr, ETH_ALEN); 619 os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN); 620 head->u.beacon.beacon_int = 621 host_to_le16(hapd->iconf->beacon_int); 622 623 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 624 capab_info = hostapd_own_capab_info(hapd, NULL, 0); 625 head->u.beacon.capab_info = host_to_le16(capab_info); 626 pos = &head->u.beacon.variable[0]; 627 628 /* SSID */ 629 *pos++ = WLAN_EID_SSID; 630 if (hapd->conf->ignore_broadcast_ssid == 2) { 631 /* clear the data, but keep the correct length of the SSID */ 632 *pos++ = hapd->conf->ssid.ssid_len; 633 os_memset(pos, 0, hapd->conf->ssid.ssid_len); 634 pos += hapd->conf->ssid.ssid_len; 635 } else if (hapd->conf->ignore_broadcast_ssid) { 636 *pos++ = 0; /* empty SSID */ 637 } else { 638 *pos++ = hapd->conf->ssid.ssid_len; 639 os_memcpy(pos, hapd->conf->ssid.ssid, 640 hapd->conf->ssid.ssid_len); 641 pos += hapd->conf->ssid.ssid_len; 642 } 643 644 /* Supported rates */ 645 pos = hostapd_eid_supp_rates(hapd, pos); 646 647 /* DS Params */ 648 pos = hostapd_eid_ds_params(hapd, pos); 649 650 head_len = pos - (u8 *) head; 651 652 tailpos = hostapd_eid_country(hapd, tailpos, 653 tail + BEACON_TAIL_BUF_SIZE - tailpos); 654 655 /* ERP Information element */ 656 tailpos = hostapd_eid_erp_info(hapd, tailpos); 657 658 /* Extended supported rates */ 659 tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos); 660 661 /* RSN, MDIE, WPA */ 662 tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE - 663 tailpos); 664 665#ifdef CONFIG_IEEE80211N 666 tailpos = hostapd_eid_ht_capabilities(hapd, tailpos); 667 tailpos = hostapd_eid_ht_operation(hapd, tailpos); 668#endif /* CONFIG_IEEE80211N */ 669 670 tailpos = hostapd_eid_ext_capab(hapd, tailpos); 671 672 /* 673 * TODO: Time Advertisement element should only be included in some 674 * DTIM Beacon frames. 675 */ 676 tailpos = hostapd_eid_time_adv(hapd, tailpos); 677 678 tailpos = hostapd_eid_interworking(hapd, tailpos); 679 tailpos = hostapd_eid_adv_proto(hapd, tailpos); 680 tailpos = hostapd_eid_roaming_consortium(hapd, tailpos); 681 682#ifdef CONFIG_IEEE80211AC 683 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos); 684 tailpos = hostapd_eid_vht_operation(hapd, tailpos); 685#endif /* CONFIG_IEEE80211AC */ 686 687 /* Wi-Fi Alliance WMM */ 688 tailpos = hostapd_eid_wmm(hapd, tailpos); 689 690#ifdef CONFIG_WPS 691 if (hapd->conf->wps_state && hapd->wps_beacon_ie) { 692 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie), 693 wpabuf_len(hapd->wps_beacon_ie)); 694 tailpos += wpabuf_len(hapd->wps_beacon_ie); 695 } 696#endif /* CONFIG_WPS */ 697 698#ifdef CONFIG_P2P 699 if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) { 700 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie), 701 wpabuf_len(hapd->p2p_beacon_ie)); 702 tailpos += wpabuf_len(hapd->p2p_beacon_ie); 703 } 704#endif /* CONFIG_P2P */ 705#ifdef CONFIG_P2P_MANAGER 706 if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) == 707 P2P_MANAGE) 708 tailpos = hostapd_eid_p2p_manage(hapd, tailpos); 709#endif /* CONFIG_P2P_MANAGER */ 710 711#ifdef CONFIG_HS20 712 tailpos = hostapd_eid_hs20_indication(hapd, tailpos); 713#endif /* CONFIG_HS20 */ 714 715 if (hapd->conf->vendor_elements) { 716 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements), 717 wpabuf_len(hapd->conf->vendor_elements)); 718 tailpos += wpabuf_len(hapd->conf->vendor_elements); 719 } 720 721 tail_len = tailpos > tail ? tailpos - tail : 0; 722 723 resp = hostapd_probe_resp_offloads(hapd, &resp_len); 724#endif /* NEED_AP_MLME */ 725 726 os_memset(¶ms, 0, sizeof(params)); 727 params.head = (u8 *) head; 728 params.head_len = head_len; 729 params.tail = tail; 730 params.tail_len = tail_len; 731 params.proberesp = resp; 732 params.proberesp_len = resp_len; 733 params.dtim_period = hapd->conf->dtim_period; 734 params.beacon_int = hapd->iconf->beacon_int; 735 params.basic_rates = hapd->iface->basic_rates; 736 params.ssid = hapd->conf->ssid.ssid; 737 params.ssid_len = hapd->conf->ssid.ssid_len; 738 params.pairwise_ciphers = hapd->conf->rsn_pairwise ? 739 hapd->conf->rsn_pairwise : hapd->conf->wpa_pairwise; 740 params.group_cipher = hapd->conf->wpa_group; 741 params.key_mgmt_suites = hapd->conf->wpa_key_mgmt; 742 params.auth_algs = hapd->conf->auth_algs; 743 params.wpa_version = hapd->conf->wpa; 744 params.privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa || 745 (hapd->conf->ieee802_1x && 746 (hapd->conf->default_wep_key_len || 747 hapd->conf->individual_wep_key_len)); 748 switch (hapd->conf->ignore_broadcast_ssid) { 749 case 0: 750 params.hide_ssid = NO_SSID_HIDING; 751 break; 752 case 1: 753 params.hide_ssid = HIDDEN_SSID_ZERO_LEN; 754 break; 755 case 2: 756 params.hide_ssid = HIDDEN_SSID_ZERO_CONTENTS; 757 break; 758 } 759 hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp); 760 params.beacon_ies = beacon; 761 params.proberesp_ies = proberesp; 762 params.assocresp_ies = assocresp; 763 params.isolate = hapd->conf->isolate; 764#ifdef NEED_AP_MLME 765 params.cts_protect = !!(ieee802_11_erp_info(hapd) & 766 ERP_INFO_USE_PROTECTION); 767 params.preamble = hapd->iface->num_sta_no_short_preamble == 0 && 768 hapd->iconf->preamble == SHORT_PREAMBLE; 769 if (hapd->iface->current_mode && 770 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G) 771 params.short_slot_time = 772 hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1; 773 else 774 params.short_slot_time = -1; 775 if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n) 776 params.ht_opmode = -1; 777 else 778 params.ht_opmode = hapd->iface->ht_op_mode; 779#endif /* NEED_AP_MLME */ 780 params.interworking = hapd->conf->interworking; 781 if (hapd->conf->interworking && 782 !is_zero_ether_addr(hapd->conf->hessid)) 783 params.hessid = hapd->conf->hessid; 784 params.access_network_type = hapd->conf->access_network_type; 785 params.ap_max_inactivity = hapd->conf->ap_max_inactivity; 786#ifdef CONFIG_HS20 787 params.disable_dgaf = hapd->conf->disable_dgaf; 788#endif /* CONFIG_HS20 */ 789 if (hostapd_drv_set_ap(hapd, ¶ms)) 790 wpa_printf(MSG_ERROR, "Failed to set beacon parameters"); 791 hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp); 792 793 os_free(tail); 794 os_free(head); 795 os_free(resp); 796} 797 798 799void ieee802_11_set_beacons(struct hostapd_iface *iface) 800{ 801 size_t i; 802 for (i = 0; i < iface->num_bss; i++) 803 ieee802_11_set_beacon(iface->bss[i]); 804} 805 806 807/* only update beacons if started */ 808void ieee802_11_update_beacons(struct hostapd_iface *iface) 809{ 810 size_t i; 811 for (i = 0; i < iface->num_bss; i++) 812 if (iface->bss[i]->beacon_set_done) 813 ieee802_11_set_beacon(iface->bss[i]); 814} 815 816#endif /* CONFIG_NATIVE_WINDOWS */ 817