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
)
37 #ifdef CONFIG_TESTING_OPTIONS
38 if (hapd
->conf
->bss_load_test_set
) {
41 *eid
++ = WLAN_EID_BSS_LOAD
;
43 os_memcpy(eid
, hapd
->conf
->bss_load_test
, 5);
46 #endif /* CONFIG_TESTING_OPTIONS */
51 static u8
ieee802_11_erp_info(struct hostapd_data
*hapd
)
55 if (hapd
->iface
->current_mode
== NULL
||
56 hapd
->iface
->current_mode
->mode
!= HOSTAPD_MODE_IEEE80211G
)
59 if (hapd
->iface
->olbc
)
60 erp
|= ERP_INFO_USE_PROTECTION
;
61 if (hapd
->iface
->num_sta_non_erp
> 0) {
62 erp
|= ERP_INFO_NON_ERP_PRESENT
|
63 ERP_INFO_USE_PROTECTION
;
65 if (hapd
->iface
->num_sta_no_short_preamble
> 0 ||
66 hapd
->iconf
->preamble
== LONG_PREAMBLE
)
67 erp
|= ERP_INFO_BARKER_PREAMBLE_MODE
;
73 static u8
* hostapd_eid_ds_params(struct hostapd_data
*hapd
, u8
*eid
)
75 *eid
++ = WLAN_EID_DS_PARAMS
;
77 *eid
++ = hapd
->iconf
->channel
;
82 static u8
* hostapd_eid_erp_info(struct hostapd_data
*hapd
, u8
*eid
)
84 if (hapd
->iface
->current_mode
== NULL
||
85 hapd
->iface
->current_mode
->mode
!= HOSTAPD_MODE_IEEE80211G
)
88 /* Set NonERP_present and use_protection bits if there
89 * are any associated NonERP stations. */
90 /* TODO: use_protection bit can be set to zero even if
91 * there are NonERP stations present. This optimization
92 * might be useful if NonERP stations are "quiet".
93 * See 802.11g/D6 E-1 for recommended practice.
94 * In addition, Non ERP present might be set, if AP detects Non ERP
95 * operation on other APs. */
97 /* Add ERP Information element */
98 *eid
++ = WLAN_EID_ERP_INFO
;
100 *eid
++ = ieee802_11_erp_info(hapd
);
106 static u8
* hostapd_eid_pwr_constraint(struct hostapd_data
*hapd
, u8
*eid
)
109 u8 local_pwr_constraint
= 0;
112 if (hapd
->iface
->current_mode
== NULL
||
113 hapd
->iface
->current_mode
->mode
!= HOSTAPD_MODE_IEEE80211A
)
117 * There is no DFS support and power constraint was not directly
118 * requested by config option.
120 if (!hapd
->iconf
->ieee80211h
&&
121 hapd
->iconf
->local_pwr_constraint
== -1)
124 /* Check if DFS is required by regulatory. */
125 dfs
= hostapd_is_dfs_required(hapd
->iface
);
127 wpa_printf(MSG_WARNING
, "Failed to check if DFS is required; ret=%d",
132 if (dfs
== 0 && hapd
->iconf
->local_pwr_constraint
== -1)
136 * ieee80211h (DFS) is enabled so Power Constraint element shall
137 * be added when running on DFS channel whenever local_pwr_constraint
138 * is configured or not. In order to meet regulations when TPC is not
139 * implemented using a transmit power that is below the legal maximum
140 * (including any mitigation factor) should help. In this case,
141 * indicate 3 dB below maximum allowed transmit power.
143 if (hapd
->iconf
->local_pwr_constraint
== -1)
144 local_pwr_constraint
= 3;
147 * A STA that is not an AP shall use a transmit power less than or
148 * equal to the local maximum transmit power level for the channel.
149 * The local maximum transmit power can be calculated from the formula:
150 * local max TX pwr = max TX pwr - local pwr constraint
151 * Where max TX pwr is maximum transmit power level specified for
152 * channel in Country element and local pwr constraint is specified
153 * for channel in this Power Constraint element.
157 *pos
++ = WLAN_EID_PWR_CONSTRAINT
;
160 /* Local Power Constraint */
161 if (local_pwr_constraint
)
162 *pos
++ = local_pwr_constraint
;
164 *pos
++ = hapd
->iconf
->local_pwr_constraint
;
170 static u8
* hostapd_eid_country_add(u8
*pos
, u8
*end
, int chan_spacing
,
171 struct hostapd_channel_data
*start
,
172 struct hostapd_channel_data
*prev
)
177 /* first channel number */
178 *pos
++ = start
->chan
;
179 /* number of channels */
180 *pos
++ = (prev
->chan
- start
->chan
) / chan_spacing
+ 1;
181 /* maximum transmit power level */
182 *pos
++ = start
->max_tx_power
;
188 static u8
* hostapd_eid_country(struct hostapd_data
*hapd
, u8
*eid
,
192 u8
*end
= eid
+ max_len
;
194 struct hostapd_hw_modes
*mode
;
195 struct hostapd_channel_data
*start
, *prev
;
196 int chan_spacing
= 1;
198 if (!hapd
->iconf
->ieee80211d
|| max_len
< 6 ||
199 hapd
->iface
->current_mode
== NULL
)
202 *pos
++ = WLAN_EID_COUNTRY
;
203 pos
++; /* length will be set later */
204 os_memcpy(pos
, hapd
->iconf
->country
, 3); /* e.g., 'US ' */
207 mode
= hapd
->iface
->current_mode
;
208 if (mode
->mode
== HOSTAPD_MODE_IEEE80211A
)
212 for (i
= 0; i
< mode
->num_channels
; i
++) {
213 struct hostapd_channel_data
*chan
= &mode
->channels
[i
];
214 if (chan
->flag
& HOSTAPD_CHAN_DISABLED
)
217 prev
->chan
+ chan_spacing
== chan
->chan
&&
218 start
->max_tx_power
== chan
->max_tx_power
) {
220 continue; /* can use same entry */
224 pos
= hostapd_eid_country_add(pos
, end
, chan_spacing
,
229 /* Start new group */
234 pos
= hostapd_eid_country_add(pos
, end
, chan_spacing
,
238 if ((pos
- eid
) & 1) {
241 *pos
++ = 0; /* pad for 16-bit alignment */
244 eid
[1] = (pos
- eid
) - 2;
250 static u8
* hostapd_eid_wpa(struct hostapd_data
*hapd
, u8
*eid
, size_t len
)
255 ie
= wpa_auth_get_wpa_ie(hapd
->wpa_auth
, &ielen
);
256 if (ie
== NULL
|| ielen
> len
)
259 os_memcpy(eid
, ie
, ielen
);
264 static u8
* hostapd_eid_csa(struct hostapd_data
*hapd
, u8
*eid
)
268 if (!hapd
->iface
->cs_freq_params
.freq
)
271 if (ieee80211_freq_to_chan(hapd
->iface
->cs_freq_params
.freq
, &chan
) ==
275 *eid
++ = WLAN_EID_CHANNEL_SWITCH
;
277 *eid
++ = hapd
->iface
->cs_block_tx
;
279 *eid
++ = hapd
->iface
->cs_count
;
285 static u8
* hostapd_eid_secondary_channel(struct hostapd_data
*hapd
, u8
*eid
)
289 if (!hapd
->iface
->cs_freq_params
.sec_channel_offset
)
292 if (hapd
->iface
->cs_freq_params
.sec_channel_offset
== -1)
293 sec_ch
= HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW
;
294 else if (hapd
->iface
->cs_freq_params
.sec_channel_offset
== 1)
295 sec_ch
= HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE
;
299 *eid
++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET
;
307 static u8
* hostapd_add_csa_elems(struct hostapd_data
*hapd
, u8
*pos
,
308 u8
*start
, unsigned int *csa_counter_off
)
312 if (!csa_counter_off
)
315 *csa_counter_off
= 0;
316 pos
= hostapd_eid_csa(hapd
, pos
);
318 if (pos
!= old_pos
) {
319 /* save an offset to the counter - should be last byte */
320 *csa_counter_off
= pos
- start
- 1;
321 pos
= hostapd_eid_secondary_channel(hapd
, pos
);
328 static u8
* hostapd_gen_probe_resp(struct hostapd_data
*hapd
,
329 struct sta_info
*sta
,
330 const struct ieee80211_mgmt
*req
,
331 int is_p2p
, size_t *resp_len
)
333 struct ieee80211_mgmt
*resp
;
337 #define MAX_PROBERESP_LEN 768
338 buflen
= MAX_PROBERESP_LEN
;
340 if (hapd
->wps_probe_resp_ie
)
341 buflen
+= wpabuf_len(hapd
->wps_probe_resp_ie
);
342 #endif /* CONFIG_WPS */
344 if (hapd
->p2p_probe_resp_ie
)
345 buflen
+= wpabuf_len(hapd
->p2p_probe_resp_ie
);
346 #endif /* CONFIG_P2P */
347 if (hapd
->conf
->vendor_elements
)
348 buflen
+= wpabuf_len(hapd
->conf
->vendor_elements
);
349 resp
= os_zalloc(buflen
);
353 epos
= ((u8
*) resp
) + MAX_PROBERESP_LEN
;
355 resp
->frame_control
= IEEE80211_FC(WLAN_FC_TYPE_MGMT
,
356 WLAN_FC_STYPE_PROBE_RESP
);
358 os_memcpy(resp
->da
, req
->sa
, ETH_ALEN
);
359 os_memcpy(resp
->sa
, hapd
->own_addr
, ETH_ALEN
);
361 os_memcpy(resp
->bssid
, hapd
->own_addr
, ETH_ALEN
);
362 resp
->u
.probe_resp
.beacon_int
=
363 host_to_le16(hapd
->iconf
->beacon_int
);
365 /* hardware or low-level driver will setup seq_ctrl and timestamp */
366 resp
->u
.probe_resp
.capab_info
=
367 host_to_le16(hostapd_own_capab_info(hapd
, sta
, 1));
369 pos
= resp
->u
.probe_resp
.variable
;
370 *pos
++ = WLAN_EID_SSID
;
371 *pos
++ = hapd
->conf
->ssid
.ssid_len
;
372 os_memcpy(pos
, hapd
->conf
->ssid
.ssid
, hapd
->conf
->ssid
.ssid_len
);
373 pos
+= hapd
->conf
->ssid
.ssid_len
;
375 /* Supported rates */
376 pos
= hostapd_eid_supp_rates(hapd
, pos
);
379 pos
= hostapd_eid_ds_params(hapd
, pos
);
381 pos
= hostapd_eid_country(hapd
, pos
, epos
- pos
);
383 /* Power Constraint element */
384 pos
= hostapd_eid_pwr_constraint(hapd
, pos
);
386 /* ERP Information element */
387 pos
= hostapd_eid_erp_info(hapd
, pos
);
389 /* Extended supported rates */
390 pos
= hostapd_eid_ext_supp_rates(hapd
, pos
);
393 pos
= hostapd_eid_wpa(hapd
, pos
, epos
- pos
);
395 pos
= hostapd_eid_bss_load(hapd
, pos
, epos
- pos
);
397 #ifdef CONFIG_IEEE80211N
398 pos
= hostapd_eid_ht_capabilities(hapd
, pos
);
399 pos
= hostapd_eid_ht_operation(hapd
, pos
);
400 #endif /* CONFIG_IEEE80211N */
402 pos
= hostapd_eid_ext_capab(hapd
, pos
);
404 pos
= hostapd_eid_time_adv(hapd
, pos
);
405 pos
= hostapd_eid_time_zone(hapd
, pos
);
407 pos
= hostapd_eid_interworking(hapd
, pos
);
408 pos
= hostapd_eid_adv_proto(hapd
, pos
);
409 pos
= hostapd_eid_roaming_consortium(hapd
, pos
);
411 pos
= hostapd_add_csa_elems(hapd
, pos
, (u8
*)resp
,
412 &hapd
->iface
->cs_c_off_proberesp
);
413 #ifdef CONFIG_IEEE80211AC
414 pos
= hostapd_eid_vht_capabilities(hapd
, pos
);
415 pos
= hostapd_eid_vht_operation(hapd
, pos
);
416 #endif /* CONFIG_IEEE80211AC */
418 /* Wi-Fi Alliance WMM */
419 pos
= hostapd_eid_wmm(hapd
, pos
);
422 if (hapd
->conf
->wps_state
&& hapd
->wps_probe_resp_ie
) {
423 os_memcpy(pos
, wpabuf_head(hapd
->wps_probe_resp_ie
),
424 wpabuf_len(hapd
->wps_probe_resp_ie
));
425 pos
+= wpabuf_len(hapd
->wps_probe_resp_ie
);
427 #endif /* CONFIG_WPS */
430 if ((hapd
->conf
->p2p
& P2P_ENABLED
) && is_p2p
&&
431 hapd
->p2p_probe_resp_ie
) {
432 os_memcpy(pos
, wpabuf_head(hapd
->p2p_probe_resp_ie
),
433 wpabuf_len(hapd
->p2p_probe_resp_ie
));
434 pos
+= wpabuf_len(hapd
->p2p_probe_resp_ie
);
436 #endif /* CONFIG_P2P */
437 #ifdef CONFIG_P2P_MANAGER
438 if ((hapd
->conf
->p2p
& (P2P_MANAGE
| P2P_ENABLED
| P2P_GROUP_OWNER
)) ==
440 pos
= hostapd_eid_p2p_manage(hapd
, pos
);
441 #endif /* CONFIG_P2P_MANAGER */
444 pos
= hostapd_eid_hs20_indication(hapd
, pos
);
445 #endif /* CONFIG_HS20 */
447 if (hapd
->conf
->vendor_elements
) {
448 os_memcpy(pos
, wpabuf_head(hapd
->conf
->vendor_elements
),
449 wpabuf_len(hapd
->conf
->vendor_elements
));
450 pos
+= wpabuf_len(hapd
->conf
->vendor_elements
);
453 *resp_len
= pos
- (u8
*) resp
;
458 enum ssid_match_result
{
464 static enum ssid_match_result
ssid_match(struct hostapd_data
*hapd
,
465 const u8
*ssid
, size_t ssid_len
,
467 size_t ssid_list_len
)
474 if (ssid_len
== hapd
->conf
->ssid
.ssid_len
&&
475 os_memcmp(ssid
, hapd
->conf
->ssid
.ssid
, ssid_len
) == 0)
476 return EXACT_SSID_MATCH
;
478 if (ssid_list
== NULL
)
479 return wildcard
? WILDCARD_SSID_MATCH
: NO_SSID_MATCH
;
482 end
= ssid_list
+ ssid_list_len
;
483 while (pos
+ 1 <= end
) {
484 if (pos
+ 2 + pos
[1] > end
)
488 if (pos
[1] == hapd
->conf
->ssid
.ssid_len
&&
489 os_memcmp(pos
+ 2, hapd
->conf
->ssid
.ssid
, pos
[1]) == 0)
490 return EXACT_SSID_MATCH
;
494 return wildcard
? WILDCARD_SSID_MATCH
: NO_SSID_MATCH
;
498 void handle_probe_req(struct hostapd_data
*hapd
,
499 const struct ieee80211_mgmt
*mgmt
, size_t len
,
503 struct ieee802_11_elems elems
;
506 struct sta_info
*sta
= NULL
;
509 enum ssid_match_result res
;
511 ie
= mgmt
->u
.probe_req
.variable
;
512 if (len
< IEEE80211_HDRLEN
+ sizeof(mgmt
->u
.probe_req
))
514 ie_len
= len
- (IEEE80211_HDRLEN
+ sizeof(mgmt
->u
.probe_req
));
516 for (i
= 0; hapd
->probereq_cb
&& i
< hapd
->num_probereq_cb
; i
++)
517 if (hapd
->probereq_cb
[i
].cb(hapd
->probereq_cb
[i
].ctx
,
518 mgmt
->sa
, mgmt
->da
, mgmt
->bssid
,
519 ie
, ie_len
, ssi_signal
) > 0)
522 if (!hapd
->iconf
->send_probe_response
)
525 if (ieee802_11_parse_elems(ie
, ie_len
, &elems
, 0) == ParseFailed
) {
526 wpa_printf(MSG_DEBUG
, "Could not parse ProbeReq from " MACSTR
,
531 if ((!elems
.ssid
|| !elems
.supp_rates
)) {
532 wpa_printf(MSG_DEBUG
, "STA " MACSTR
" sent probe request "
533 "without SSID or supported rates element",
539 if (hapd
->p2p
&& elems
.wps_ie
) {
541 wps
= ieee802_11_vendor_ie_concat(ie
, ie_len
, WPS_DEV_OUI_WFA
);
542 if (wps
&& !p2p_group_match_dev_type(hapd
->p2p_group
, wps
)) {
543 wpa_printf(MSG_MSGDUMP
, "P2P: Ignore Probe Request "
544 "due to mismatch with Requested Device "
552 if (hapd
->p2p
&& elems
.p2p
) {
554 p2p
= ieee802_11_vendor_ie_concat(ie
, ie_len
, P2P_IE_VENDOR_TYPE
);
555 if (p2p
&& !p2p_group_match_dev_id(hapd
->p2p_group
, p2p
)) {
556 wpa_printf(MSG_MSGDUMP
, "P2P: Ignore Probe Request "
557 "due to mismatch with Device ID");
563 #endif /* CONFIG_P2P */
565 if (hapd
->conf
->ignore_broadcast_ssid
&& elems
.ssid_len
== 0 &&
566 elems
.ssid_list_len
== 0) {
567 wpa_printf(MSG_MSGDUMP
, "Probe Request from " MACSTR
" for "
568 "broadcast SSID ignored", MAC2STR(mgmt
->sa
));
572 sta
= ap_get_sta(hapd
, mgmt
->sa
);
575 if ((hapd
->conf
->p2p
& P2P_GROUP_OWNER
) &&
576 elems
.ssid_len
== P2P_WILDCARD_SSID_LEN
&&
577 os_memcmp(elems
.ssid
, P2P_WILDCARD_SSID
,
578 P2P_WILDCARD_SSID_LEN
) == 0) {
579 /* Process P2P Wildcard SSID like Wildcard SSID */
582 #endif /* CONFIG_P2P */
584 res
= ssid_match(hapd
, elems
.ssid
, elems
.ssid_len
,
585 elems
.ssid_list
, elems
.ssid_list_len
);
586 if (res
!= NO_SSID_MATCH
) {
588 sta
->ssid_probe
= &hapd
->conf
->ssid
;
590 if (!(mgmt
->da
[0] & 0x01)) {
591 wpa_printf(MSG_MSGDUMP
, "Probe Request from " MACSTR
592 " for foreign SSID '%s' (DA " MACSTR
")%s",
594 wpa_ssid_txt(elems
.ssid
, elems
.ssid_len
),
596 elems
.ssid_list
? " (SSID list)" : "");
601 #ifdef CONFIG_INTERWORKING
602 if (elems
.interworking
&& elems
.interworking_len
>= 1) {
603 u8 ant
= elems
.interworking
[0] & 0x0f;
604 if (ant
!= INTERWORKING_ANT_WILDCARD
&&
605 ant
!= hapd
->conf
->access_network_type
) {
606 wpa_printf(MSG_MSGDUMP
, "Probe Request from " MACSTR
607 " for mismatching ANT %u ignored",
608 MAC2STR(mgmt
->sa
), ant
);
613 if (elems
.interworking
&&
614 (elems
.interworking_len
== 7 || elems
.interworking_len
== 9)) {
616 if (elems
.interworking_len
== 7)
617 hessid
= elems
.interworking
+ 1;
619 hessid
= elems
.interworking
+ 1 + 2;
620 if (!is_broadcast_ether_addr(hessid
) &&
621 os_memcmp(hessid
, hapd
->conf
->hessid
, ETH_ALEN
) != 0) {
622 wpa_printf(MSG_MSGDUMP
, "Probe Request from " MACSTR
623 " for mismatching HESSID " MACSTR
625 MAC2STR(mgmt
->sa
), MAC2STR(hessid
));
629 #endif /* CONFIG_INTERWORKING */
632 if ((hapd
->conf
->p2p
& P2P_GROUP_OWNER
) &&
633 supp_rates_11b_only(&elems
)) {
634 /* Indicates support for 11b rates only */
635 wpa_printf(MSG_EXCESSIVE
, "P2P: Ignore Probe Request from "
636 MACSTR
" with only 802.11b rates",
640 #endif /* CONFIG_P2P */
642 /* TODO: verify that supp_rates contains at least one matching rate
643 * with AP configuration */
645 #ifdef CONFIG_TESTING_OPTIONS
646 if (hapd
->iconf
->ignore_probe_probability
> 0.0d
&&
647 drand48() < hapd
->iconf
->ignore_probe_probability
) {
649 "TESTING: ignoring probe request from " MACSTR
,
653 #endif /* CONFIG_TESTING_OPTIONS */
655 resp
= hostapd_gen_probe_resp(hapd
, sta
, mgmt
, elems
.p2p
!= NULL
,
661 * If this is a broadcast probe request, apply no ack policy to avoid
664 noack
= !!(res
== WILDCARD_SSID_MATCH
&&
665 is_broadcast_ether_addr(mgmt
->da
));
667 if (hostapd_drv_send_mlme(hapd
, resp
, resp_len
, noack
) < 0)
668 wpa_printf(MSG_INFO
, "handle_probe_req: send failed");
672 wpa_printf(MSG_EXCESSIVE
, "STA " MACSTR
" sent probe request for %s "
673 "SSID", MAC2STR(mgmt
->sa
),
674 elems
.ssid_len
== 0 ? "broadcast" : "our");
678 static u8
* hostapd_probe_resp_offloads(struct hostapd_data
*hapd
,
681 /* check probe response offloading caps and print warnings */
682 if (!(hapd
->iface
->drv_flags
& WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD
))
686 if (hapd
->conf
->wps_state
&& hapd
->wps_probe_resp_ie
&&
687 (!(hapd
->iface
->probe_resp_offloads
&
688 (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS
|
689 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2
))))
690 wpa_printf(MSG_WARNING
, "Device is trying to offload WPS "
691 "Probe Response while not supporting this");
692 #endif /* CONFIG_WPS */
695 if ((hapd
->conf
->p2p
& P2P_ENABLED
) && hapd
->p2p_probe_resp_ie
&&
696 !(hapd
->iface
->probe_resp_offloads
&
697 WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P
))
698 wpa_printf(MSG_WARNING
, "Device is trying to offload P2P "
699 "Probe Response while not supporting this");
700 #endif /* CONFIG_P2P */
702 if (hapd
->conf
->interworking
&&
703 !(hapd
->iface
->probe_resp_offloads
&
704 WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING
))
705 wpa_printf(MSG_WARNING
, "Device is trying to offload "
706 "Interworking Probe Response while not supporting "
709 /* Generate a Probe Response template for the non-P2P case */
710 return hostapd_gen_probe_resp(hapd
, NULL
, NULL
, 0, resp_len
);
713 #endif /* NEED_AP_MLME */
716 int ieee802_11_build_ap_params(struct hostapd_data
*hapd
,
717 struct wpa_driver_ap_params
*params
)
719 struct ieee80211_mgmt
*head
= NULL
;
721 size_t head_len
= 0, tail_len
= 0;
728 #define BEACON_HEAD_BUF_SIZE 256
729 #define BEACON_TAIL_BUF_SIZE 512
730 head
= os_zalloc(BEACON_HEAD_BUF_SIZE
);
731 tail_len
= BEACON_TAIL_BUF_SIZE
;
733 if (hapd
->conf
->wps_state
&& hapd
->wps_beacon_ie
)
734 tail_len
+= wpabuf_len(hapd
->wps_beacon_ie
);
735 #endif /* CONFIG_WPS */
737 if (hapd
->p2p_beacon_ie
)
738 tail_len
+= wpabuf_len(hapd
->p2p_beacon_ie
);
739 #endif /* CONFIG_P2P */
740 if (hapd
->conf
->vendor_elements
)
741 tail_len
+= wpabuf_len(hapd
->conf
->vendor_elements
);
742 tailpos
= tail
= os_malloc(tail_len
);
743 if (head
== NULL
|| tail
== NULL
) {
744 wpa_printf(MSG_ERROR
, "Failed to set beacon data");
750 head
->frame_control
= IEEE80211_FC(WLAN_FC_TYPE_MGMT
,
751 WLAN_FC_STYPE_BEACON
);
752 head
->duration
= host_to_le16(0);
753 os_memset(head
->da
, 0xff, ETH_ALEN
);
755 os_memcpy(head
->sa
, hapd
->own_addr
, ETH_ALEN
);
756 os_memcpy(head
->bssid
, hapd
->own_addr
, ETH_ALEN
);
757 head
->u
.beacon
.beacon_int
=
758 host_to_le16(hapd
->iconf
->beacon_int
);
760 /* hardware or low-level driver will setup seq_ctrl and timestamp */
761 capab_info
= hostapd_own_capab_info(hapd
, NULL
, 0);
762 head
->u
.beacon
.capab_info
= host_to_le16(capab_info
);
763 pos
= &head
->u
.beacon
.variable
[0];
766 *pos
++ = WLAN_EID_SSID
;
767 if (hapd
->conf
->ignore_broadcast_ssid
== 2) {
768 /* clear the data, but keep the correct length of the SSID */
769 *pos
++ = hapd
->conf
->ssid
.ssid_len
;
770 os_memset(pos
, 0, hapd
->conf
->ssid
.ssid_len
);
771 pos
+= hapd
->conf
->ssid
.ssid_len
;
772 } else if (hapd
->conf
->ignore_broadcast_ssid
) {
773 *pos
++ = 0; /* empty SSID */
775 *pos
++ = hapd
->conf
->ssid
.ssid_len
;
776 os_memcpy(pos
, hapd
->conf
->ssid
.ssid
,
777 hapd
->conf
->ssid
.ssid_len
);
778 pos
+= hapd
->conf
->ssid
.ssid_len
;
781 /* Supported rates */
782 pos
= hostapd_eid_supp_rates(hapd
, pos
);
785 pos
= hostapd_eid_ds_params(hapd
, pos
);
787 head_len
= pos
- (u8
*) head
;
789 tailpos
= hostapd_eid_country(hapd
, tailpos
,
790 tail
+ BEACON_TAIL_BUF_SIZE
- tailpos
);
792 /* Power Constraint element */
793 tailpos
= hostapd_eid_pwr_constraint(hapd
, tailpos
);
795 /* ERP Information element */
796 tailpos
= hostapd_eid_erp_info(hapd
, tailpos
);
798 /* Extended supported rates */
799 tailpos
= hostapd_eid_ext_supp_rates(hapd
, tailpos
);
802 tailpos
= hostapd_eid_wpa(hapd
, tailpos
, tail
+ BEACON_TAIL_BUF_SIZE
-
805 tailpos
= hostapd_eid_bss_load(hapd
, tailpos
,
806 tail
+ BEACON_TAIL_BUF_SIZE
- tailpos
);
808 #ifdef CONFIG_IEEE80211N
809 tailpos
= hostapd_eid_ht_capabilities(hapd
, tailpos
);
810 tailpos
= hostapd_eid_ht_operation(hapd
, tailpos
);
811 #endif /* CONFIG_IEEE80211N */
813 tailpos
= hostapd_eid_ext_capab(hapd
, tailpos
);
816 * TODO: Time Advertisement element should only be included in some
817 * DTIM Beacon frames.
819 tailpos
= hostapd_eid_time_adv(hapd
, tailpos
);
821 tailpos
= hostapd_eid_interworking(hapd
, tailpos
);
822 tailpos
= hostapd_eid_adv_proto(hapd
, tailpos
);
823 tailpos
= hostapd_eid_roaming_consortium(hapd
, tailpos
);
824 tailpos
= hostapd_add_csa_elems(hapd
, tailpos
, tail
,
825 &hapd
->iface
->cs_c_off_beacon
);
826 #ifdef CONFIG_IEEE80211AC
827 tailpos
= hostapd_eid_vht_capabilities(hapd
, tailpos
);
828 tailpos
= hostapd_eid_vht_operation(hapd
, tailpos
);
829 #endif /* CONFIG_IEEE80211AC */
831 /* Wi-Fi Alliance WMM */
832 tailpos
= hostapd_eid_wmm(hapd
, tailpos
);
835 if (hapd
->conf
->wps_state
&& hapd
->wps_beacon_ie
) {
836 os_memcpy(tailpos
, wpabuf_head(hapd
->wps_beacon_ie
),
837 wpabuf_len(hapd
->wps_beacon_ie
));
838 tailpos
+= wpabuf_len(hapd
->wps_beacon_ie
);
840 #endif /* CONFIG_WPS */
843 if ((hapd
->conf
->p2p
& P2P_ENABLED
) && hapd
->p2p_beacon_ie
) {
844 os_memcpy(tailpos
, wpabuf_head(hapd
->p2p_beacon_ie
),
845 wpabuf_len(hapd
->p2p_beacon_ie
));
846 tailpos
+= wpabuf_len(hapd
->p2p_beacon_ie
);
848 #endif /* CONFIG_P2P */
849 #ifdef CONFIG_P2P_MANAGER
850 if ((hapd
->conf
->p2p
& (P2P_MANAGE
| P2P_ENABLED
| P2P_GROUP_OWNER
)) ==
852 tailpos
= hostapd_eid_p2p_manage(hapd
, tailpos
);
853 #endif /* CONFIG_P2P_MANAGER */
856 tailpos
= hostapd_eid_hs20_indication(hapd
, tailpos
);
857 #endif /* CONFIG_HS20 */
859 if (hapd
->conf
->vendor_elements
) {
860 os_memcpy(tailpos
, wpabuf_head(hapd
->conf
->vendor_elements
),
861 wpabuf_len(hapd
->conf
->vendor_elements
));
862 tailpos
+= wpabuf_len(hapd
->conf
->vendor_elements
);
865 tail_len
= tailpos
> tail
? tailpos
- tail
: 0;
867 resp
= hostapd_probe_resp_offloads(hapd
, &resp_len
);
868 #endif /* NEED_AP_MLME */
870 os_memset(params
, 0, sizeof(*params
));
871 params
->head
= (u8
*) head
;
872 params
->head_len
= head_len
;
874 params
->tail_len
= tail_len
;
875 params
->proberesp
= resp
;
876 params
->proberesp_len
= resp_len
;
877 params
->dtim_period
= hapd
->conf
->dtim_period
;
878 params
->beacon_int
= hapd
->iconf
->beacon_int
;
879 params
->basic_rates
= hapd
->iface
->basic_rates
;
880 params
->ssid
= hapd
->conf
->ssid
.ssid
;
881 params
->ssid_len
= hapd
->conf
->ssid
.ssid_len
;
882 params
->pairwise_ciphers
= hapd
->conf
->rsn_pairwise
?
883 hapd
->conf
->rsn_pairwise
: hapd
->conf
->wpa_pairwise
;
884 params
->group_cipher
= hapd
->conf
->wpa_group
;
885 params
->key_mgmt_suites
= hapd
->conf
->wpa_key_mgmt
;
886 params
->auth_algs
= hapd
->conf
->auth_algs
;
887 params
->wpa_version
= hapd
->conf
->wpa
;
888 params
->privacy
= hapd
->conf
->ssid
.wep
.keys_set
|| hapd
->conf
->wpa
||
889 (hapd
->conf
->ieee802_1x
&&
890 (hapd
->conf
->default_wep_key_len
||
891 hapd
->conf
->individual_wep_key_len
));
892 switch (hapd
->conf
->ignore_broadcast_ssid
) {
894 params
->hide_ssid
= NO_SSID_HIDING
;
897 params
->hide_ssid
= HIDDEN_SSID_ZERO_LEN
;
900 params
->hide_ssid
= HIDDEN_SSID_ZERO_CONTENTS
;
903 params
->isolate
= hapd
->conf
->isolate
;
905 params
->cts_protect
= !!(ieee802_11_erp_info(hapd
) &
906 ERP_INFO_USE_PROTECTION
);
907 params
->preamble
= hapd
->iface
->num_sta_no_short_preamble
== 0 &&
908 hapd
->iconf
->preamble
== SHORT_PREAMBLE
;
909 if (hapd
->iface
->current_mode
&&
910 hapd
->iface
->current_mode
->mode
== HOSTAPD_MODE_IEEE80211G
)
911 params
->short_slot_time
=
912 hapd
->iface
->num_sta_no_short_slot_time
> 0 ? 0 : 1;
914 params
->short_slot_time
= -1;
915 if (!hapd
->iconf
->ieee80211n
|| hapd
->conf
->disable_11n
)
916 params
->ht_opmode
= -1;
918 params
->ht_opmode
= hapd
->iface
->ht_op_mode
;
919 #endif /* NEED_AP_MLME */
920 params
->interworking
= hapd
->conf
->interworking
;
921 if (hapd
->conf
->interworking
&&
922 !is_zero_ether_addr(hapd
->conf
->hessid
))
923 params
->hessid
= hapd
->conf
->hessid
;
924 params
->access_network_type
= hapd
->conf
->access_network_type
;
925 params
->ap_max_inactivity
= hapd
->conf
->ap_max_inactivity
;
927 params
->disable_dgaf
= hapd
->conf
->disable_dgaf
;
928 #endif /* CONFIG_HS20 */
933 void ieee802_11_free_ap_params(struct wpa_driver_ap_params
*params
)
935 os_free(params
->tail
);
937 os_free(params
->head
);
939 os_free(params
->proberesp
);
940 params
->proberesp
= NULL
;
944 int ieee802_11_set_beacon(struct hostapd_data
*hapd
)
946 struct wpa_driver_ap_params params
;
947 struct wpabuf
*beacon
, *proberesp
, *assocresp
;
950 if (hapd
->iface
->csa_in_progress
) {
951 wpa_printf(MSG_ERROR
, "Cannot set beacons during CSA period");
955 hapd
->beacon_set_done
= 1;
957 if (ieee802_11_build_ap_params(hapd
, ¶ms
) < 0)
960 if (hostapd_build_ap_extra_ies(hapd
, &beacon
, &proberesp
, &assocresp
) <
964 params
.beacon_ies
= beacon
;
965 params
.proberesp_ies
= proberesp
;
966 params
.assocresp_ies
= assocresp
;
968 res
= hostapd_drv_set_ap(hapd
, ¶ms
);
969 hostapd_free_ap_extra_ies(hapd
, beacon
, proberesp
, assocresp
);
971 wpa_printf(MSG_ERROR
, "Failed to set beacon parameters");
975 ieee802_11_free_ap_params(¶ms
);
980 int ieee802_11_set_beacons(struct hostapd_iface
*iface
)
985 for (i
= 0; i
< iface
->num_bss
; i
++) {
986 if (iface
->bss
[i
]->started
&&
987 ieee802_11_set_beacon(iface
->bss
[i
]) < 0)
995 /* only update beacons if started */
996 int ieee802_11_update_beacons(struct hostapd_iface
*iface
)
1001 for (i
= 0; i
< iface
->num_bss
; i
++) {
1002 if (iface
->bss
[i
]->beacon_set_done
&& iface
->bss
[i
]->started
&&
1003 ieee802_11_set_beacon(iface
->bss
[i
]) < 0)
1010 #endif /* CONFIG_NATIVE_WINDOWS */