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>
7 * This software may be distributed under the terms of the BSD license.
8 * See README for more details.
11 #include "utils/includes.h"
13 #ifndef CONFIG_NATIVE_WINDOWS
15 #include "utils/common.h"
16 #include "common/ieee802_11_defs.h"
17 #include "common/ieee802_11_common.h"
18 #include "wps/wps_defs.h"
21 #include "ieee802_11.h"
24 #include "ap_config.h"
26 #include "p2p_hostapd.h"
27 #include "ap_drv_ops.h"
35 static u8 * hostapd_eid_bss_load(struct hostapd_data *hapd, u8 *eid, size_t len)
40 #ifdef CONFIG_TESTING_OPTIONS
41 if (hapd->conf->bss_load_test_set) {
42 *eid++ = WLAN_EID_BSS_LOAD;
44 os_memcpy(eid, hapd->conf->bss_load_test, 5);
48 #endif /* CONFIG_TESTING_OPTIONS */
49 if (hapd->conf->bss_load_update_period) {
50 *eid++ = WLAN_EID_BSS_LOAD;
52 WPA_PUT_LE16(eid, hapd->num_sta);
54 *eid++ = hapd->iface->channel_utilization;
55 WPA_PUT_LE16(eid, 0); /* no available admission capabity */
62 static u8 ieee802_11_erp_info(struct hostapd_data *hapd)
66 if (hapd->iface->current_mode == NULL ||
67 hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
70 if (hapd->iface->olbc)
71 erp |= ERP_INFO_USE_PROTECTION;
72 if (hapd->iface->num_sta_non_erp > 0) {
73 erp |= ERP_INFO_NON_ERP_PRESENT |
74 ERP_INFO_USE_PROTECTION;
76 if (hapd->iface->num_sta_no_short_preamble > 0 ||
77 hapd->iconf->preamble == LONG_PREAMBLE)
78 erp |= ERP_INFO_BARKER_PREAMBLE_MODE;
84 static u8 * hostapd_eid_ds_params(struct hostapd_data *hapd, u8 *eid)
86 *eid++ = WLAN_EID_DS_PARAMS;
88 *eid++ = hapd->iconf->channel;
93 static u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid)
95 if (hapd->iface->current_mode == NULL ||
96 hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
99 /* Set NonERP_present and use_protection bits if there
100 * are any associated NonERP stations. */
101 /* TODO: use_protection bit can be set to zero even if
102 * there are NonERP stations present. This optimization
103 * might be useful if NonERP stations are "quiet".
104 * See 802.11g/D6 E-1 for recommended practice.
105 * In addition, Non ERP present might be set, if AP detects Non ERP
106 * operation on other APs. */
108 /* Add ERP Information element */
109 *eid++ = WLAN_EID_ERP_INFO;
111 *eid++ = ieee802_11_erp_info(hapd);
117 static u8 * hostapd_eid_pwr_constraint(struct hostapd_data *hapd, u8 *eid)
120 u8 local_pwr_constraint = 0;
123 if (hapd->iface->current_mode == NULL ||
124 hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A)
127 /* Let host drivers add this IE if DFS support is offloaded */
128 if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD)
132 * There is no DFS support and power constraint was not directly
133 * requested by config option.
135 if (!hapd->iconf->ieee80211h &&
136 hapd->iconf->local_pwr_constraint == -1)
139 /* Check if DFS is required by regulatory. */
140 dfs = hostapd_is_dfs_required(hapd->iface);
142 wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d",
147 if (dfs == 0 && hapd->iconf->local_pwr_constraint == -1)
151 * ieee80211h (DFS) is enabled so Power Constraint element shall
152 * be added when running on DFS channel whenever local_pwr_constraint
153 * is configured or not. In order to meet regulations when TPC is not
154 * implemented using a transmit power that is below the legal maximum
155 * (including any mitigation factor) should help. In this case,
156 * indicate 3 dB below maximum allowed transmit power.
158 if (hapd->iconf->local_pwr_constraint == -1)
159 local_pwr_constraint = 3;
162 * A STA that is not an AP shall use a transmit power less than or
163 * equal to the local maximum transmit power level for the channel.
164 * The local maximum transmit power can be calculated from the formula:
165 * local max TX pwr = max TX pwr - local pwr constraint
166 * Where max TX pwr is maximum transmit power level specified for
167 * channel in Country element and local pwr constraint is specified
168 * for channel in this Power Constraint element.
172 *pos++ = WLAN_EID_PWR_CONSTRAINT;
175 /* Local Power Constraint */
176 if (local_pwr_constraint)
177 *pos++ = local_pwr_constraint;
179 *pos++ = hapd->iconf->local_pwr_constraint;
185 static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing,
186 struct hostapd_channel_data *start,
187 struct hostapd_channel_data *prev)
192 /* first channel number */
193 *pos++ = start->chan;
194 /* number of channels */
195 *pos++ = (prev->chan - start->chan) / chan_spacing + 1;
196 /* maximum transmit power level */
197 *pos++ = start->max_tx_power;
203 static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
207 u8 *end = eid + max_len;
209 struct hostapd_hw_modes *mode;
210 struct hostapd_channel_data *start, *prev;
211 int chan_spacing = 1;
213 if (!hapd->iconf->ieee80211d || max_len < 6 ||
214 hapd->iface->current_mode == NULL)
217 *pos++ = WLAN_EID_COUNTRY;
218 pos++; /* length will be set later */
219 os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */
222 mode = hapd->iface->current_mode;
223 if (mode->mode == HOSTAPD_MODE_IEEE80211A)
227 for (i = 0; i < mode->num_channels; i++) {
228 struct hostapd_channel_data *chan = &mode->channels[i];
229 if (chan->flag & HOSTAPD_CHAN_DISABLED)
232 prev->chan + chan_spacing == chan->chan &&
233 start->max_tx_power == chan->max_tx_power) {
235 continue; /* can use same entry */
239 pos = hostapd_eid_country_add(pos, end, chan_spacing,
244 /* Start new group */
249 pos = hostapd_eid_country_add(pos, end, chan_spacing,
253 if ((pos - eid) & 1) {
256 *pos++ = 0; /* pad for 16-bit alignment */
259 eid[1] = (pos - eid) - 2;
265 static u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len)
270 ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
271 if (ie == NULL || ielen > len)
274 os_memcpy(eid, ie, ielen);
279 static u8 * hostapd_eid_csa(struct hostapd_data *hapd, u8 *eid)
283 if (!hapd->cs_freq_params.freq)
286 if (ieee80211_freq_to_chan(hapd->cs_freq_params.freq, &chan) ==
290 *eid++ = WLAN_EID_CHANNEL_SWITCH;
292 *eid++ = hapd->cs_block_tx;
294 *eid++ = hapd->cs_count;
300 static u8 * hostapd_eid_secondary_channel(struct hostapd_data *hapd, u8 *eid)
304 if (!hapd->cs_freq_params.sec_channel_offset)
307 if (hapd->cs_freq_params.sec_channel_offset == -1)
308 sec_ch = HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW;
309 else if (hapd->cs_freq_params.sec_channel_offset == 1)
310 sec_ch = HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE;
314 *eid++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;
322 static u8 * hostapd_add_csa_elems(struct hostapd_data *hapd, u8 *pos,
323 u8 *start, unsigned int *csa_counter_off)
327 if (!csa_counter_off)
330 *csa_counter_off = 0;
331 pos = hostapd_eid_csa(hapd, pos);
333 if (pos != old_pos) {
334 /* save an offset to the counter - should be last byte */
335 *csa_counter_off = pos - start - 1;
336 pos = hostapd_eid_secondary_channel(hapd, pos);
343 static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
344 struct sta_info *sta,
345 const struct ieee80211_mgmt *req,
346 int is_p2p, size_t *resp_len)
348 struct ieee80211_mgmt *resp;
352 #define MAX_PROBERESP_LEN 768
353 buflen = MAX_PROBERESP_LEN;
355 if (hapd->wps_probe_resp_ie)
356 buflen += wpabuf_len(hapd->wps_probe_resp_ie);
357 #endif /* CONFIG_WPS */
359 if (hapd->p2p_probe_resp_ie)
360 buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
361 #endif /* CONFIG_P2P */
362 if (hapd->conf->vendor_elements)
363 buflen += wpabuf_len(hapd->conf->vendor_elements);
364 resp = os_zalloc(buflen);
368 epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
370 resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
371 WLAN_FC_STYPE_PROBE_RESP);
373 os_memcpy(resp->da, req->sa, ETH_ALEN);
374 os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
376 os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
377 resp->u.probe_resp.beacon_int =
378 host_to_le16(hapd->iconf->beacon_int);
380 /* hardware or low-level driver will setup seq_ctrl and timestamp */
381 resp->u.probe_resp.capab_info =
382 host_to_le16(hostapd_own_capab_info(hapd, sta, 1));
384 pos = resp->u.probe_resp.variable;
385 *pos++ = WLAN_EID_SSID;
386 *pos++ = hapd->conf->ssid.ssid_len;
387 os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
388 pos += hapd->conf->ssid.ssid_len;
390 /* Supported rates */
391 pos = hostapd_eid_supp_rates(hapd, pos);
394 pos = hostapd_eid_ds_params(hapd, pos);
396 pos = hostapd_eid_country(hapd, pos, epos - pos);
398 /* Power Constraint element */
399 pos = hostapd_eid_pwr_constraint(hapd, pos);
401 /* ERP Information element */
402 pos = hostapd_eid_erp_info(hapd, pos);
404 /* Extended supported rates */
405 pos = hostapd_eid_ext_supp_rates(hapd, pos);
408 pos = hostapd_eid_wpa(hapd, pos, epos - pos);
410 pos = hostapd_eid_bss_load(hapd, pos, epos - pos);
412 #ifdef CONFIG_IEEE80211N
413 pos = hostapd_eid_ht_capabilities(hapd, pos);
414 pos = hostapd_eid_ht_operation(hapd, pos);
415 #endif /* CONFIG_IEEE80211N */
417 pos = hostapd_eid_ext_capab(hapd, pos);
419 pos = hostapd_eid_time_adv(hapd, pos);
420 pos = hostapd_eid_time_zone(hapd, pos);
422 pos = hostapd_eid_interworking(hapd, pos);
423 pos = hostapd_eid_adv_proto(hapd, pos);
424 pos = hostapd_eid_roaming_consortium(hapd, pos);
426 pos = hostapd_add_csa_elems(hapd, pos, (u8 *)resp,
427 &hapd->cs_c_off_proberesp);
428 #ifdef CONFIG_IEEE80211AC
429 pos = hostapd_eid_vht_capabilities(hapd, pos);
430 pos = hostapd_eid_vht_operation(hapd, pos);
431 #endif /* CONFIG_IEEE80211AC */
433 /* Wi-Fi Alliance WMM */
434 pos = hostapd_eid_wmm(hapd, pos);
437 if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
438 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
439 wpabuf_len(hapd->wps_probe_resp_ie));
440 pos += wpabuf_len(hapd->wps_probe_resp_ie);
442 #endif /* CONFIG_WPS */
445 if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
446 hapd->p2p_probe_resp_ie) {
447 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
448 wpabuf_len(hapd->p2p_probe_resp_ie));
449 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
451 #endif /* CONFIG_P2P */
452 #ifdef CONFIG_P2P_MANAGER
453 if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
455 pos = hostapd_eid_p2p_manage(hapd, pos);
456 #endif /* CONFIG_P2P_MANAGER */
459 pos = hostapd_eid_hs20_indication(hapd, pos);
460 pos = hostapd_eid_osen(hapd, pos);
461 #endif /* CONFIG_HS20 */
463 if (hapd->conf->vendor_elements) {
464 os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
465 wpabuf_len(hapd->conf->vendor_elements));
466 pos += wpabuf_len(hapd->conf->vendor_elements);
469 *resp_len = pos - (u8 *) resp;
474 enum ssid_match_result {
480 static enum ssid_match_result ssid_match(struct hostapd_data *hapd,
481 const u8 *ssid, size_t ssid_len,
483 size_t ssid_list_len)
490 if (ssid_len == hapd->conf->ssid.ssid_len &&
491 os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0)
492 return EXACT_SSID_MATCH;
494 if (ssid_list == NULL)
495 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
498 end = ssid_list + ssid_list_len;
499 while (pos + 1 <= end) {
500 if (pos + 2 + pos[1] > end)
504 if (pos[1] == hapd->conf->ssid.ssid_len &&
505 os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0)
506 return EXACT_SSID_MATCH;
510 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
514 void handle_probe_req(struct hostapd_data *hapd,
515 const struct ieee80211_mgmt *mgmt, size_t len,
519 struct ieee802_11_elems elems;
522 struct sta_info *sta = NULL;
525 enum ssid_match_result res;
527 ie = mgmt->u.probe_req.variable;
528 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
530 ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
532 for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
533 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
534 mgmt->sa, mgmt->da, mgmt->bssid,
535 ie, ie_len, ssi_signal) > 0)
538 if (!hapd->iconf->send_probe_response)
541 if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
542 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
547 if ((!elems.ssid || !elems.supp_rates)) {
548 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
549 "without SSID or supported rates element",
555 if (hapd->p2p && elems.wps_ie) {
557 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
558 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
559 wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
560 "due to mismatch with Requested Device "
568 if (hapd->p2p && elems.p2p) {
570 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
571 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
572 wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
573 "due to mismatch with Device ID");
579 #endif /* CONFIG_P2P */
581 if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 &&
582 elems.ssid_list_len == 0) {
583 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
584 "broadcast SSID ignored", MAC2STR(mgmt->sa));
588 sta = ap_get_sta(hapd, mgmt->sa);
591 if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
592 elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
593 os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
594 P2P_WILDCARD_SSID_LEN) == 0) {
595 /* Process P2P Wildcard SSID like Wildcard SSID */
598 #endif /* CONFIG_P2P */
600 res = ssid_match(hapd, elems.ssid, elems.ssid_len,
601 elems.ssid_list, elems.ssid_list_len);
602 if (res != NO_SSID_MATCH) {
604 sta->ssid_probe = &hapd->conf->ssid;
606 if (!(mgmt->da[0] & 0x01)) {
607 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
608 " for foreign SSID '%s' (DA " MACSTR ")%s",
610 wpa_ssid_txt(elems.ssid, elems.ssid_len),
612 elems.ssid_list ? " (SSID list)" : "");
617 #ifdef CONFIG_INTERWORKING
618 if (hapd->conf->interworking &&
619 elems.interworking && elems.interworking_len >= 1) {
620 u8 ant = elems.interworking[0] & 0x0f;
621 if (ant != INTERWORKING_ANT_WILDCARD &&
622 ant != hapd->conf->access_network_type) {
623 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
624 " for mismatching ANT %u ignored",
625 MAC2STR(mgmt->sa), ant);
630 if (hapd->conf->interworking && elems.interworking &&
631 (elems.interworking_len == 7 || elems.interworking_len == 9)) {
633 if (elems.interworking_len == 7)
634 hessid = elems.interworking + 1;
636 hessid = elems.interworking + 1 + 2;
637 if (!is_broadcast_ether_addr(hessid) &&
638 os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
639 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
640 " for mismatching HESSID " MACSTR
642 MAC2STR(mgmt->sa), MAC2STR(hessid));
646 #endif /* CONFIG_INTERWORKING */
649 if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
650 supp_rates_11b_only(&elems)) {
651 /* Indicates support for 11b rates only */
652 wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from "
653 MACSTR " with only 802.11b rates",
657 #endif /* CONFIG_P2P */
659 /* TODO: verify that supp_rates contains at least one matching rate
660 * with AP configuration */
662 #ifdef CONFIG_TESTING_OPTIONS
663 if (hapd->iconf->ignore_probe_probability > 0.0 &&
664 drand48() < hapd->iconf->ignore_probe_probability) {
666 "TESTING: ignoring probe request from " MACSTR,
670 #endif /* CONFIG_TESTING_OPTIONS */
672 resp = hostapd_gen_probe_resp(hapd, sta, mgmt, elems.p2p != NULL,
678 * If this is a broadcast probe request, apply no ack policy to avoid
681 noack = !!(res == WILDCARD_SSID_MATCH &&
682 is_broadcast_ether_addr(mgmt->da));
684 if (hostapd_drv_send_mlme(hapd, resp, resp_len, noack) < 0)
685 wpa_printf(MSG_INFO, "handle_probe_req: send failed");
689 wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
690 "SSID", MAC2STR(mgmt->sa),
691 elems.ssid_len == 0 ? "broadcast" : "our");
695 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
698 /* check probe response offloading caps and print warnings */
699 if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
703 if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
704 (!(hapd->iface->probe_resp_offloads &
705 (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
706 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
707 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
708 "Probe Response while not supporting this");
709 #endif /* CONFIG_WPS */
712 if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
713 !(hapd->iface->probe_resp_offloads &
714 WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
715 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
716 "Probe Response while not supporting this");
717 #endif /* CONFIG_P2P */
719 if (hapd->conf->interworking &&
720 !(hapd->iface->probe_resp_offloads &
721 WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
722 wpa_printf(MSG_WARNING, "Device is trying to offload "
723 "Interworking Probe Response while not supporting "
726 /* Generate a Probe Response template for the non-P2P case */
727 return hostapd_gen_probe_resp(hapd, NULL, NULL, 0, resp_len);
730 #endif /* NEED_AP_MLME */
733 int ieee802_11_build_ap_params(struct hostapd_data *hapd,
734 struct wpa_driver_ap_params *params)
736 struct ieee80211_mgmt *head = NULL;
738 size_t head_len = 0, tail_len = 0;
745 #define BEACON_HEAD_BUF_SIZE 256
746 #define BEACON_TAIL_BUF_SIZE 512
747 head = os_zalloc(BEACON_HEAD_BUF_SIZE);
748 tail_len = BEACON_TAIL_BUF_SIZE;
750 if (hapd->conf->wps_state && hapd->wps_beacon_ie)
751 tail_len += wpabuf_len(hapd->wps_beacon_ie);
752 #endif /* CONFIG_WPS */
754 if (hapd->p2p_beacon_ie)
755 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
756 #endif /* CONFIG_P2P */
757 if (hapd->conf->vendor_elements)
758 tail_len += wpabuf_len(hapd->conf->vendor_elements);
759 tailpos = tail = os_malloc(tail_len);
760 if (head == NULL || tail == NULL) {
761 wpa_printf(MSG_ERROR, "Failed to set beacon data");
767 head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
768 WLAN_FC_STYPE_BEACON);
769 head->duration = host_to_le16(0);
770 os_memset(head->da, 0xff, ETH_ALEN);
772 os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
773 os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
774 head->u.beacon.beacon_int =
775 host_to_le16(hapd->iconf->beacon_int);
777 /* hardware or low-level driver will setup seq_ctrl and timestamp */
778 capab_info = hostapd_own_capab_info(hapd, NULL, 0);
779 head->u.beacon.capab_info = host_to_le16(capab_info);
780 pos = &head->u.beacon.variable[0];
783 *pos++ = WLAN_EID_SSID;
784 if (hapd->conf->ignore_broadcast_ssid == 2) {
785 /* clear the data, but keep the correct length of the SSID */
786 *pos++ = hapd->conf->ssid.ssid_len;
787 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
788 pos += hapd->conf->ssid.ssid_len;
789 } else if (hapd->conf->ignore_broadcast_ssid) {
790 *pos++ = 0; /* empty SSID */
792 *pos++ = hapd->conf->ssid.ssid_len;
793 os_memcpy(pos, hapd->conf->ssid.ssid,
794 hapd->conf->ssid.ssid_len);
795 pos += hapd->conf->ssid.ssid_len;
798 /* Supported rates */
799 pos = hostapd_eid_supp_rates(hapd, pos);
802 pos = hostapd_eid_ds_params(hapd, pos);
804 head_len = pos - (u8 *) head;
806 tailpos = hostapd_eid_country(hapd, tailpos,
807 tail + BEACON_TAIL_BUF_SIZE - tailpos);
809 /* Power Constraint element */
810 tailpos = hostapd_eid_pwr_constraint(hapd, tailpos);
812 /* ERP Information element */
813 tailpos = hostapd_eid_erp_info(hapd, tailpos);
815 /* Extended supported rates */
816 tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
819 tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
822 tailpos = hostapd_eid_bss_load(hapd, tailpos,
823 tail + BEACON_TAIL_BUF_SIZE - tailpos);
825 #ifdef CONFIG_IEEE80211N
826 tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
827 tailpos = hostapd_eid_ht_operation(hapd, tailpos);
828 #endif /* CONFIG_IEEE80211N */
830 tailpos = hostapd_eid_ext_capab(hapd, tailpos);
833 * TODO: Time Advertisement element should only be included in some
834 * DTIM Beacon frames.
836 tailpos = hostapd_eid_time_adv(hapd, tailpos);
838 tailpos = hostapd_eid_interworking(hapd, tailpos);
839 tailpos = hostapd_eid_adv_proto(hapd, tailpos);
840 tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
841 tailpos = hostapd_add_csa_elems(hapd, tailpos, tail,
842 &hapd->cs_c_off_beacon);
843 #ifdef CONFIG_IEEE80211AC
844 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
845 tailpos = hostapd_eid_vht_operation(hapd, tailpos);
846 #endif /* CONFIG_IEEE80211AC */
848 /* Wi-Fi Alliance WMM */
849 tailpos = hostapd_eid_wmm(hapd, tailpos);
852 if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
853 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
854 wpabuf_len(hapd->wps_beacon_ie));
855 tailpos += wpabuf_len(hapd->wps_beacon_ie);
857 #endif /* CONFIG_WPS */
860 if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
861 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
862 wpabuf_len(hapd->p2p_beacon_ie));
863 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
865 #endif /* CONFIG_P2P */
866 #ifdef CONFIG_P2P_MANAGER
867 if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
869 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
870 #endif /* CONFIG_P2P_MANAGER */
873 tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
874 tailpos = hostapd_eid_osen(hapd, tailpos);
875 #endif /* CONFIG_HS20 */
877 if (hapd->conf->vendor_elements) {
878 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),
879 wpabuf_len(hapd->conf->vendor_elements));
880 tailpos += wpabuf_len(hapd->conf->vendor_elements);
883 tail_len = tailpos > tail ? tailpos - tail : 0;
885 resp = hostapd_probe_resp_offloads(hapd, &resp_len);
886 #endif /* NEED_AP_MLME */
888 os_memset(params, 0, sizeof(*params));
889 params->head = (u8 *) head;
890 params->head_len = head_len;
892 params->tail_len = tail_len;
893 params->proberesp = resp;
894 params->proberesp_len = resp_len;
895 params->dtim_period = hapd->conf->dtim_period;
896 params->beacon_int = hapd->iconf->beacon_int;
897 params->basic_rates = hapd->iface->basic_rates;
898 params->ssid = hapd->conf->ssid.ssid;
899 params->ssid_len = hapd->conf->ssid.ssid_len;
900 params->pairwise_ciphers = hapd->conf->wpa_pairwise |
901 hapd->conf->rsn_pairwise;
902 params->group_cipher = hapd->conf->wpa_group;
903 params->key_mgmt_suites = hapd->conf->wpa_key_mgmt;
904 params->auth_algs = hapd->conf->auth_algs;
905 params->wpa_version = hapd->conf->wpa;
906 params->privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
907 (hapd->conf->ieee802_1x &&
908 (hapd->conf->default_wep_key_len ||
909 hapd->conf->individual_wep_key_len));
910 switch (hapd->conf->ignore_broadcast_ssid) {
912 params->hide_ssid = NO_SSID_HIDING;
915 params->hide_ssid = HIDDEN_SSID_ZERO_LEN;
918 params->hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
921 params->isolate = hapd->conf->isolate;
922 params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK;
924 params->cts_protect = !!(ieee802_11_erp_info(hapd) &
925 ERP_INFO_USE_PROTECTION);
926 params->preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
927 hapd->iconf->preamble == SHORT_PREAMBLE;
928 if (hapd->iface->current_mode &&
929 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
930 params->short_slot_time =
931 hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
933 params->short_slot_time = -1;
934 if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
935 params->ht_opmode = -1;
937 params->ht_opmode = hapd->iface->ht_op_mode;
938 #endif /* NEED_AP_MLME */
939 params->interworking = hapd->conf->interworking;
940 if (hapd->conf->interworking &&
941 !is_zero_ether_addr(hapd->conf->hessid))
942 params->hessid = hapd->conf->hessid;
943 params->access_network_type = hapd->conf->access_network_type;
944 params->ap_max_inactivity = hapd->conf->ap_max_inactivity;
946 params->disable_dgaf = hapd->conf->disable_dgaf;
947 if (hapd->conf->osen) {
951 #endif /* CONFIG_HS20 */
956 void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params)
958 os_free(params->tail);
960 os_free(params->head);
962 os_free(params->proberesp);
963 params->proberesp = NULL;
967 int ieee802_11_set_beacon(struct hostapd_data *hapd)
969 struct wpa_driver_ap_params params;
970 struct hostapd_freq_params freq;
971 struct hostapd_iface *iface = hapd->iface;
972 struct hostapd_config *iconf = iface->conf;
973 struct wpabuf *beacon, *proberesp, *assocresp;
976 if (hapd->csa_in_progress) {
977 wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period");
981 hapd->beacon_set_done = 1;
983 if (ieee802_11_build_ap_params(hapd, ¶ms) < 0)
986 if (hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp) <
990 params.beacon_ies = beacon;
991 params.proberesp_ies = proberesp;
992 params.assocresp_ies = assocresp;
994 if (iface->current_mode &&
995 hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq,
996 iconf->channel, iconf->ieee80211n,
998 iconf->secondary_channel,
999 iconf->vht_oper_chwidth,
1000 iconf->vht_oper_centr_freq_seg0_idx,
1001 iconf->vht_oper_centr_freq_seg1_idx,
1002 iface->current_mode->vht_capab) == 0)
1003 params.freq = &freq;
1005 res = hostapd_drv_set_ap(hapd, ¶ms);
1006 hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
1008 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
1012 ieee802_11_free_ap_params(¶ms);
1017 int ieee802_11_set_beacons(struct hostapd_iface *iface)
1022 for (i = 0; i < iface->num_bss; i++) {
1023 if (iface->bss[i]->started &&
1024 ieee802_11_set_beacon(iface->bss[i]) < 0)
1032 /* only update beacons if started */
1033 int ieee802_11_update_beacons(struct hostapd_iface *iface)
1038 for (i = 0; i < iface->num_bss; i++) {
1039 if (iface->bss[i]->beacon_set_done && iface->bss[i]->started &&
1040 ieee802_11_set_beacon(iface->bss[i]) < 0)
1047 #endif /* CONFIG_NATIVE_WINDOWS */