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 pos
= hostapd_eid_osen(hapd
, pos
);
446 #endif /* CONFIG_HS20 */
448 if (hapd
->conf
->vendor_elements
) {
449 os_memcpy(pos
, wpabuf_head(hapd
->conf
->vendor_elements
),
450 wpabuf_len(hapd
->conf
->vendor_elements
));
451 pos
+= wpabuf_len(hapd
->conf
->vendor_elements
);
454 *resp_len
= pos
- (u8
*) resp
;
459 enum ssid_match_result
{
465 static enum ssid_match_result
ssid_match(struct hostapd_data
*hapd
,
466 const u8
*ssid
, size_t ssid_len
,
468 size_t ssid_list_len
)
475 if (ssid_len
== hapd
->conf
->ssid
.ssid_len
&&
476 os_memcmp(ssid
, hapd
->conf
->ssid
.ssid
, ssid_len
) == 0)
477 return EXACT_SSID_MATCH
;
479 if (ssid_list
== NULL
)
480 return wildcard
? WILDCARD_SSID_MATCH
: NO_SSID_MATCH
;
483 end
= ssid_list
+ ssid_list_len
;
484 while (pos
+ 1 <= end
) {
485 if (pos
+ 2 + pos
[1] > end
)
489 if (pos
[1] == hapd
->conf
->ssid
.ssid_len
&&
490 os_memcmp(pos
+ 2, hapd
->conf
->ssid
.ssid
, pos
[1]) == 0)
491 return EXACT_SSID_MATCH
;
495 return wildcard
? WILDCARD_SSID_MATCH
: NO_SSID_MATCH
;
499 void handle_probe_req(struct hostapd_data
*hapd
,
500 const struct ieee80211_mgmt
*mgmt
, size_t len
,
504 struct ieee802_11_elems elems
;
507 struct sta_info
*sta
= NULL
;
510 enum ssid_match_result res
;
512 ie
= mgmt
->u
.probe_req
.variable
;
513 if (len
< IEEE80211_HDRLEN
+ sizeof(mgmt
->u
.probe_req
))
515 ie_len
= len
- (IEEE80211_HDRLEN
+ sizeof(mgmt
->u
.probe_req
));
517 for (i
= 0; hapd
->probereq_cb
&& i
< hapd
->num_probereq_cb
; i
++)
518 if (hapd
->probereq_cb
[i
].cb(hapd
->probereq_cb
[i
].ctx
,
519 mgmt
->sa
, mgmt
->da
, mgmt
->bssid
,
520 ie
, ie_len
, ssi_signal
) > 0)
523 if (!hapd
->iconf
->send_probe_response
)
526 if (ieee802_11_parse_elems(ie
, ie_len
, &elems
, 0) == ParseFailed
) {
527 wpa_printf(MSG_DEBUG
, "Could not parse ProbeReq from " MACSTR
,
532 if ((!elems
.ssid
|| !elems
.supp_rates
)) {
533 wpa_printf(MSG_DEBUG
, "STA " MACSTR
" sent probe request "
534 "without SSID or supported rates element",
540 if (hapd
->p2p
&& elems
.wps_ie
) {
542 wps
= ieee802_11_vendor_ie_concat(ie
, ie_len
, WPS_DEV_OUI_WFA
);
543 if (wps
&& !p2p_group_match_dev_type(hapd
->p2p_group
, wps
)) {
544 wpa_printf(MSG_MSGDUMP
, "P2P: Ignore Probe Request "
545 "due to mismatch with Requested Device "
553 if (hapd
->p2p
&& elems
.p2p
) {
555 p2p
= ieee802_11_vendor_ie_concat(ie
, ie_len
, P2P_IE_VENDOR_TYPE
);
556 if (p2p
&& !p2p_group_match_dev_id(hapd
->p2p_group
, p2p
)) {
557 wpa_printf(MSG_MSGDUMP
, "P2P: Ignore Probe Request "
558 "due to mismatch with Device ID");
564 #endif /* CONFIG_P2P */
566 if (hapd
->conf
->ignore_broadcast_ssid
&& elems
.ssid_len
== 0 &&
567 elems
.ssid_list_len
== 0) {
568 wpa_printf(MSG_MSGDUMP
, "Probe Request from " MACSTR
" for "
569 "broadcast SSID ignored", MAC2STR(mgmt
->sa
));
573 sta
= ap_get_sta(hapd
, mgmt
->sa
);
576 if ((hapd
->conf
->p2p
& P2P_GROUP_OWNER
) &&
577 elems
.ssid_len
== P2P_WILDCARD_SSID_LEN
&&
578 os_memcmp(elems
.ssid
, P2P_WILDCARD_SSID
,
579 P2P_WILDCARD_SSID_LEN
) == 0) {
580 /* Process P2P Wildcard SSID like Wildcard SSID */
583 #endif /* CONFIG_P2P */
585 res
= ssid_match(hapd
, elems
.ssid
, elems
.ssid_len
,
586 elems
.ssid_list
, elems
.ssid_list_len
);
587 if (res
!= NO_SSID_MATCH
) {
589 sta
->ssid_probe
= &hapd
->conf
->ssid
;
591 if (!(mgmt
->da
[0] & 0x01)) {
592 wpa_printf(MSG_MSGDUMP
, "Probe Request from " MACSTR
593 " for foreign SSID '%s' (DA " MACSTR
")%s",
595 wpa_ssid_txt(elems
.ssid
, elems
.ssid_len
),
597 elems
.ssid_list
? " (SSID list)" : "");
602 #ifdef CONFIG_INTERWORKING
603 if (hapd
->conf
->interworking
&&
604 elems
.interworking
&& elems
.interworking_len
>= 1) {
605 u8 ant
= elems
.interworking
[0] & 0x0f;
606 if (ant
!= INTERWORKING_ANT_WILDCARD
&&
607 ant
!= hapd
->conf
->access_network_type
) {
608 wpa_printf(MSG_MSGDUMP
, "Probe Request from " MACSTR
609 " for mismatching ANT %u ignored",
610 MAC2STR(mgmt
->sa
), ant
);
615 if (hapd
->conf
->interworking
&& elems
.interworking
&&
616 (elems
.interworking_len
== 7 || elems
.interworking_len
== 9)) {
618 if (elems
.interworking_len
== 7)
619 hessid
= elems
.interworking
+ 1;
621 hessid
= elems
.interworking
+ 1 + 2;
622 if (!is_broadcast_ether_addr(hessid
) &&
623 os_memcmp(hessid
, hapd
->conf
->hessid
, ETH_ALEN
) != 0) {
624 wpa_printf(MSG_MSGDUMP
, "Probe Request from " MACSTR
625 " for mismatching HESSID " MACSTR
627 MAC2STR(mgmt
->sa
), MAC2STR(hessid
));
631 #endif /* CONFIG_INTERWORKING */
634 if ((hapd
->conf
->p2p
& P2P_GROUP_OWNER
) &&
635 supp_rates_11b_only(&elems
)) {
636 /* Indicates support for 11b rates only */
637 wpa_printf(MSG_EXCESSIVE
, "P2P: Ignore Probe Request from "
638 MACSTR
" with only 802.11b rates",
642 #endif /* CONFIG_P2P */
644 /* TODO: verify that supp_rates contains at least one matching rate
645 * with AP configuration */
647 #ifdef CONFIG_TESTING_OPTIONS
648 if (hapd
->iconf
->ignore_probe_probability
> 0.0 &&
649 drand48() < hapd
->iconf
->ignore_probe_probability
) {
651 "TESTING: ignoring probe request from " MACSTR
,
655 #endif /* CONFIG_TESTING_OPTIONS */
657 resp
= hostapd_gen_probe_resp(hapd
, sta
, mgmt
, elems
.p2p
!= NULL
,
663 * If this is a broadcast probe request, apply no ack policy to avoid
666 noack
= !!(res
== WILDCARD_SSID_MATCH
&&
667 is_broadcast_ether_addr(mgmt
->da
));
669 if (hostapd_drv_send_mlme(hapd
, resp
, resp_len
, noack
) < 0)
670 wpa_printf(MSG_INFO
, "handle_probe_req: send failed");
674 wpa_printf(MSG_EXCESSIVE
, "STA " MACSTR
" sent probe request for %s "
675 "SSID", MAC2STR(mgmt
->sa
),
676 elems
.ssid_len
== 0 ? "broadcast" : "our");
680 static u8
* hostapd_probe_resp_offloads(struct hostapd_data
*hapd
,
683 /* check probe response offloading caps and print warnings */
684 if (!(hapd
->iface
->drv_flags
& WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD
))
688 if (hapd
->conf
->wps_state
&& hapd
->wps_probe_resp_ie
&&
689 (!(hapd
->iface
->probe_resp_offloads
&
690 (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS
|
691 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2
))))
692 wpa_printf(MSG_WARNING
, "Device is trying to offload WPS "
693 "Probe Response while not supporting this");
694 #endif /* CONFIG_WPS */
697 if ((hapd
->conf
->p2p
& P2P_ENABLED
) && hapd
->p2p_probe_resp_ie
&&
698 !(hapd
->iface
->probe_resp_offloads
&
699 WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P
))
700 wpa_printf(MSG_WARNING
, "Device is trying to offload P2P "
701 "Probe Response while not supporting this");
702 #endif /* CONFIG_P2P */
704 if (hapd
->conf
->interworking
&&
705 !(hapd
->iface
->probe_resp_offloads
&
706 WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING
))
707 wpa_printf(MSG_WARNING
, "Device is trying to offload "
708 "Interworking Probe Response while not supporting "
711 /* Generate a Probe Response template for the non-P2P case */
712 return hostapd_gen_probe_resp(hapd
, NULL
, NULL
, 0, resp_len
);
715 #endif /* NEED_AP_MLME */
718 int ieee802_11_build_ap_params(struct hostapd_data
*hapd
,
719 struct wpa_driver_ap_params
*params
)
721 struct ieee80211_mgmt
*head
= NULL
;
723 size_t head_len
= 0, tail_len
= 0;
730 #define BEACON_HEAD_BUF_SIZE 256
731 #define BEACON_TAIL_BUF_SIZE 512
732 head
= os_zalloc(BEACON_HEAD_BUF_SIZE
);
733 tail_len
= BEACON_TAIL_BUF_SIZE
;
735 if (hapd
->conf
->wps_state
&& hapd
->wps_beacon_ie
)
736 tail_len
+= wpabuf_len(hapd
->wps_beacon_ie
);
737 #endif /* CONFIG_WPS */
739 if (hapd
->p2p_beacon_ie
)
740 tail_len
+= wpabuf_len(hapd
->p2p_beacon_ie
);
741 #endif /* CONFIG_P2P */
742 if (hapd
->conf
->vendor_elements
)
743 tail_len
+= wpabuf_len(hapd
->conf
->vendor_elements
);
744 tailpos
= tail
= os_malloc(tail_len
);
745 if (head
== NULL
|| tail
== NULL
) {
746 wpa_printf(MSG_ERROR
, "Failed to set beacon data");
752 head
->frame_control
= IEEE80211_FC(WLAN_FC_TYPE_MGMT
,
753 WLAN_FC_STYPE_BEACON
);
754 head
->duration
= host_to_le16(0);
755 os_memset(head
->da
, 0xff, ETH_ALEN
);
757 os_memcpy(head
->sa
, hapd
->own_addr
, ETH_ALEN
);
758 os_memcpy(head
->bssid
, hapd
->own_addr
, ETH_ALEN
);
759 head
->u
.beacon
.beacon_int
=
760 host_to_le16(hapd
->iconf
->beacon_int
);
762 /* hardware or low-level driver will setup seq_ctrl and timestamp */
763 capab_info
= hostapd_own_capab_info(hapd
, NULL
, 0);
764 head
->u
.beacon
.capab_info
= host_to_le16(capab_info
);
765 pos
= &head
->u
.beacon
.variable
[0];
768 *pos
++ = WLAN_EID_SSID
;
769 if (hapd
->conf
->ignore_broadcast_ssid
== 2) {
770 /* clear the data, but keep the correct length of the SSID */
771 *pos
++ = hapd
->conf
->ssid
.ssid_len
;
772 os_memset(pos
, 0, hapd
->conf
->ssid
.ssid_len
);
773 pos
+= hapd
->conf
->ssid
.ssid_len
;
774 } else if (hapd
->conf
->ignore_broadcast_ssid
) {
775 *pos
++ = 0; /* empty SSID */
777 *pos
++ = hapd
->conf
->ssid
.ssid_len
;
778 os_memcpy(pos
, hapd
->conf
->ssid
.ssid
,
779 hapd
->conf
->ssid
.ssid_len
);
780 pos
+= hapd
->conf
->ssid
.ssid_len
;
783 /* Supported rates */
784 pos
= hostapd_eid_supp_rates(hapd
, pos
);
787 pos
= hostapd_eid_ds_params(hapd
, pos
);
789 head_len
= pos
- (u8
*) head
;
791 tailpos
= hostapd_eid_country(hapd
, tailpos
,
792 tail
+ BEACON_TAIL_BUF_SIZE
- tailpos
);
794 /* Power Constraint element */
795 tailpos
= hostapd_eid_pwr_constraint(hapd
, tailpos
);
797 /* ERP Information element */
798 tailpos
= hostapd_eid_erp_info(hapd
, tailpos
);
800 /* Extended supported rates */
801 tailpos
= hostapd_eid_ext_supp_rates(hapd
, tailpos
);
804 tailpos
= hostapd_eid_wpa(hapd
, tailpos
, tail
+ BEACON_TAIL_BUF_SIZE
-
807 tailpos
= hostapd_eid_bss_load(hapd
, tailpos
,
808 tail
+ BEACON_TAIL_BUF_SIZE
- tailpos
);
810 #ifdef CONFIG_IEEE80211N
811 tailpos
= hostapd_eid_ht_capabilities(hapd
, tailpos
);
812 tailpos
= hostapd_eid_ht_operation(hapd
, tailpos
);
813 #endif /* CONFIG_IEEE80211N */
815 tailpos
= hostapd_eid_ext_capab(hapd
, tailpos
);
818 * TODO: Time Advertisement element should only be included in some
819 * DTIM Beacon frames.
821 tailpos
= hostapd_eid_time_adv(hapd
, tailpos
);
823 tailpos
= hostapd_eid_interworking(hapd
, tailpos
);
824 tailpos
= hostapd_eid_adv_proto(hapd
, tailpos
);
825 tailpos
= hostapd_eid_roaming_consortium(hapd
, tailpos
);
826 tailpos
= hostapd_add_csa_elems(hapd
, tailpos
, tail
,
827 &hapd
->iface
->cs_c_off_beacon
);
828 #ifdef CONFIG_IEEE80211AC
829 tailpos
= hostapd_eid_vht_capabilities(hapd
, tailpos
);
830 tailpos
= hostapd_eid_vht_operation(hapd
, tailpos
);
831 #endif /* CONFIG_IEEE80211AC */
833 /* Wi-Fi Alliance WMM */
834 tailpos
= hostapd_eid_wmm(hapd
, tailpos
);
837 if (hapd
->conf
->wps_state
&& hapd
->wps_beacon_ie
) {
838 os_memcpy(tailpos
, wpabuf_head(hapd
->wps_beacon_ie
),
839 wpabuf_len(hapd
->wps_beacon_ie
));
840 tailpos
+= wpabuf_len(hapd
->wps_beacon_ie
);
842 #endif /* CONFIG_WPS */
845 if ((hapd
->conf
->p2p
& P2P_ENABLED
) && hapd
->p2p_beacon_ie
) {
846 os_memcpy(tailpos
, wpabuf_head(hapd
->p2p_beacon_ie
),
847 wpabuf_len(hapd
->p2p_beacon_ie
));
848 tailpos
+= wpabuf_len(hapd
->p2p_beacon_ie
);
850 #endif /* CONFIG_P2P */
851 #ifdef CONFIG_P2P_MANAGER
852 if ((hapd
->conf
->p2p
& (P2P_MANAGE
| P2P_ENABLED
| P2P_GROUP_OWNER
)) ==
854 tailpos
= hostapd_eid_p2p_manage(hapd
, tailpos
);
855 #endif /* CONFIG_P2P_MANAGER */
858 tailpos
= hostapd_eid_hs20_indication(hapd
, tailpos
);
859 tailpos
= hostapd_eid_osen(hapd
, tailpos
);
860 #endif /* CONFIG_HS20 */
862 if (hapd
->conf
->vendor_elements
) {
863 os_memcpy(tailpos
, wpabuf_head(hapd
->conf
->vendor_elements
),
864 wpabuf_len(hapd
->conf
->vendor_elements
));
865 tailpos
+= wpabuf_len(hapd
->conf
->vendor_elements
);
868 tail_len
= tailpos
> tail
? tailpos
- tail
: 0;
870 resp
= hostapd_probe_resp_offloads(hapd
, &resp_len
);
871 #endif /* NEED_AP_MLME */
873 os_memset(params
, 0, sizeof(*params
));
874 params
->head
= (u8
*) head
;
875 params
->head_len
= head_len
;
877 params
->tail_len
= tail_len
;
878 params
->proberesp
= resp
;
879 params
->proberesp_len
= resp_len
;
880 params
->dtim_period
= hapd
->conf
->dtim_period
;
881 params
->beacon_int
= hapd
->iconf
->beacon_int
;
882 params
->basic_rates
= hapd
->iface
->basic_rates
;
883 params
->ssid
= hapd
->conf
->ssid
.ssid
;
884 params
->ssid_len
= hapd
->conf
->ssid
.ssid_len
;
885 params
->pairwise_ciphers
= hapd
->conf
->wpa_pairwise
|
886 hapd
->conf
->rsn_pairwise
;
887 params
->group_cipher
= hapd
->conf
->wpa_group
;
888 params
->key_mgmt_suites
= hapd
->conf
->wpa_key_mgmt
;
889 params
->auth_algs
= hapd
->conf
->auth_algs
;
890 params
->wpa_version
= hapd
->conf
->wpa
;
891 params
->privacy
= hapd
->conf
->ssid
.wep
.keys_set
|| hapd
->conf
->wpa
||
892 (hapd
->conf
->ieee802_1x
&&
893 (hapd
->conf
->default_wep_key_len
||
894 hapd
->conf
->individual_wep_key_len
));
895 switch (hapd
->conf
->ignore_broadcast_ssid
) {
897 params
->hide_ssid
= NO_SSID_HIDING
;
900 params
->hide_ssid
= HIDDEN_SSID_ZERO_LEN
;
903 params
->hide_ssid
= HIDDEN_SSID_ZERO_CONTENTS
;
906 params
->isolate
= hapd
->conf
->isolate
;
908 params
->cts_protect
= !!(ieee802_11_erp_info(hapd
) &
909 ERP_INFO_USE_PROTECTION
);
910 params
->preamble
= hapd
->iface
->num_sta_no_short_preamble
== 0 &&
911 hapd
->iconf
->preamble
== SHORT_PREAMBLE
;
912 if (hapd
->iface
->current_mode
&&
913 hapd
->iface
->current_mode
->mode
== HOSTAPD_MODE_IEEE80211G
)
914 params
->short_slot_time
=
915 hapd
->iface
->num_sta_no_short_slot_time
> 0 ? 0 : 1;
917 params
->short_slot_time
= -1;
918 if (!hapd
->iconf
->ieee80211n
|| hapd
->conf
->disable_11n
)
919 params
->ht_opmode
= -1;
921 params
->ht_opmode
= hapd
->iface
->ht_op_mode
;
922 #endif /* NEED_AP_MLME */
923 params
->interworking
= hapd
->conf
->interworking
;
924 if (hapd
->conf
->interworking
&&
925 !is_zero_ether_addr(hapd
->conf
->hessid
))
926 params
->hessid
= hapd
->conf
->hessid
;
927 params
->access_network_type
= hapd
->conf
->access_network_type
;
928 params
->ap_max_inactivity
= hapd
->conf
->ap_max_inactivity
;
930 params
->disable_dgaf
= hapd
->conf
->disable_dgaf
;
931 if (hapd
->conf
->osen
) {
935 #endif /* CONFIG_HS20 */
940 void ieee802_11_free_ap_params(struct wpa_driver_ap_params
*params
)
942 os_free(params
->tail
);
944 os_free(params
->head
);
946 os_free(params
->proberesp
);
947 params
->proberesp
= NULL
;
951 int ieee802_11_set_beacon(struct hostapd_data
*hapd
)
953 struct wpa_driver_ap_params params
;
954 struct hostapd_freq_params freq
;
955 struct hostapd_iface
*iface
= hapd
->iface
;
956 struct hostapd_config
*iconf
= iface
->conf
;
957 struct wpabuf
*beacon
, *proberesp
, *assocresp
;
960 if (hapd
->iface
->csa_in_progress
) {
961 wpa_printf(MSG_ERROR
, "Cannot set beacons during CSA period");
965 hapd
->beacon_set_done
= 1;
967 if (ieee802_11_build_ap_params(hapd
, ¶ms
) < 0)
970 if (hostapd_build_ap_extra_ies(hapd
, &beacon
, &proberesp
, &assocresp
) <
974 params
.beacon_ies
= beacon
;
975 params
.proberesp_ies
= proberesp
;
976 params
.assocresp_ies
= assocresp
;
978 if (iface
->current_mode
&&
979 hostapd_set_freq_params(&freq
, iconf
->hw_mode
, iface
->freq
,
980 iconf
->channel
, iconf
->ieee80211n
,
982 iconf
->secondary_channel
,
983 iconf
->vht_oper_chwidth
,
984 iconf
->vht_oper_centr_freq_seg0_idx
,
985 iconf
->vht_oper_centr_freq_seg1_idx
,
986 iface
->current_mode
->vht_capab
) == 0)
989 res
= hostapd_drv_set_ap(hapd
, ¶ms
);
990 hostapd_free_ap_extra_ies(hapd
, beacon
, proberesp
, assocresp
);
992 wpa_printf(MSG_ERROR
, "Failed to set beacon parameters");
996 ieee802_11_free_ap_params(¶ms
);
1001 int ieee802_11_set_beacons(struct hostapd_iface
*iface
)
1006 for (i
= 0; i
< iface
->num_bss
; i
++) {
1007 if (iface
->bss
[i
]->started
&&
1008 ieee802_11_set_beacon(iface
->bss
[i
]) < 0)
1016 /* only update beacons if started */
1017 int ieee802_11_update_beacons(struct hostapd_iface
*iface
)
1022 for (i
= 0; i
< iface
->num_bss
; i
++) {
1023 if (iface
->bss
[i
]->beacon_set_done
&& iface
->bss
[i
]->started
&&
1024 ieee802_11_set_beacon(iface
->bss
[i
]) < 0)
1031 #endif /* CONFIG_NATIVE_WINDOWS */