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 "common/hw_features_common.h"
19 #include "wps/wps_defs.h"
22 #include "ieee802_11.h"
25 #include "ap_config.h"
27 #include "p2p_hostapd.h"
28 #include "ap_drv_ops.h"
36 static u8
* hostapd_eid_rm_enabled_capab(struct hostapd_data
*hapd
, u8
*eid
,
39 if (!hapd
->conf
->radio_measurements
|| len
< 2 + 4)
42 *eid
++ = WLAN_EID_RRM_ENABLED_CAPABILITIES
;
44 *eid
++ = (hapd
->conf
->radio_measurements
& BIT(0)) ?
45 WLAN_RRM_CAPS_NEIGHBOR_REPORT
: 0x00;
54 static u8
* hostapd_eid_bss_load(struct hostapd_data
*hapd
, u8
*eid
, size_t len
)
59 #ifdef CONFIG_TESTING_OPTIONS
60 if (hapd
->conf
->bss_load_test_set
) {
61 *eid
++ = WLAN_EID_BSS_LOAD
;
63 os_memcpy(eid
, hapd
->conf
->bss_load_test
, 5);
67 #endif /* CONFIG_TESTING_OPTIONS */
68 if (hapd
->conf
->bss_load_update_period
) {
69 *eid
++ = WLAN_EID_BSS_LOAD
;
71 WPA_PUT_LE16(eid
, hapd
->num_sta
);
73 *eid
++ = hapd
->iface
->channel_utilization
;
74 WPA_PUT_LE16(eid
, 0); /* no available admission capabity */
81 static u8
ieee802_11_erp_info(struct hostapd_data
*hapd
)
85 if (hapd
->iface
->current_mode
== NULL
||
86 hapd
->iface
->current_mode
->mode
!= HOSTAPD_MODE_IEEE80211G
)
89 if (hapd
->iface
->olbc
)
90 erp
|= ERP_INFO_USE_PROTECTION
;
91 if (hapd
->iface
->num_sta_non_erp
> 0) {
92 erp
|= ERP_INFO_NON_ERP_PRESENT
|
93 ERP_INFO_USE_PROTECTION
;
95 if (hapd
->iface
->num_sta_no_short_preamble
> 0 ||
96 hapd
->iconf
->preamble
== LONG_PREAMBLE
)
97 erp
|= ERP_INFO_BARKER_PREAMBLE_MODE
;
103 static u8
* hostapd_eid_ds_params(struct hostapd_data
*hapd
, u8
*eid
)
105 *eid
++ = WLAN_EID_DS_PARAMS
;
107 *eid
++ = hapd
->iconf
->channel
;
112 static u8
* hostapd_eid_erp_info(struct hostapd_data
*hapd
, u8
*eid
)
114 if (hapd
->iface
->current_mode
== NULL
||
115 hapd
->iface
->current_mode
->mode
!= HOSTAPD_MODE_IEEE80211G
)
118 /* Set NonERP_present and use_protection bits if there
119 * are any associated NonERP stations. */
120 /* TODO: use_protection bit can be set to zero even if
121 * there are NonERP stations present. This optimization
122 * might be useful if NonERP stations are "quiet".
123 * See 802.11g/D6 E-1 for recommended practice.
124 * In addition, Non ERP present might be set, if AP detects Non ERP
125 * operation on other APs. */
127 /* Add ERP Information element */
128 *eid
++ = WLAN_EID_ERP_INFO
;
130 *eid
++ = ieee802_11_erp_info(hapd
);
136 static u8
* hostapd_eid_pwr_constraint(struct hostapd_data
*hapd
, u8
*eid
)
139 u8 local_pwr_constraint
= 0;
142 if (hapd
->iface
->current_mode
== NULL
||
143 hapd
->iface
->current_mode
->mode
!= HOSTAPD_MODE_IEEE80211A
)
146 /* Let host drivers add this IE if DFS support is offloaded */
147 if (hapd
->iface
->drv_flags
& WPA_DRIVER_FLAGS_DFS_OFFLOAD
)
151 * There is no DFS support and power constraint was not directly
152 * requested by config option.
154 if (!hapd
->iconf
->ieee80211h
&&
155 hapd
->iconf
->local_pwr_constraint
== -1)
158 /* Check if DFS is required by regulatory. */
159 dfs
= hostapd_is_dfs_required(hapd
->iface
);
161 wpa_printf(MSG_WARNING
, "Failed to check if DFS is required; ret=%d",
166 if (dfs
== 0 && hapd
->iconf
->local_pwr_constraint
== -1)
170 * ieee80211h (DFS) is enabled so Power Constraint element shall
171 * be added when running on DFS channel whenever local_pwr_constraint
172 * is configured or not. In order to meet regulations when TPC is not
173 * implemented using a transmit power that is below the legal maximum
174 * (including any mitigation factor) should help. In this case,
175 * indicate 3 dB below maximum allowed transmit power.
177 if (hapd
->iconf
->local_pwr_constraint
== -1)
178 local_pwr_constraint
= 3;
181 * A STA that is not an AP shall use a transmit power less than or
182 * equal to the local maximum transmit power level for the channel.
183 * The local maximum transmit power can be calculated from the formula:
184 * local max TX pwr = max TX pwr - local pwr constraint
185 * Where max TX pwr is maximum transmit power level specified for
186 * channel in Country element and local pwr constraint is specified
187 * for channel in this Power Constraint element.
191 *pos
++ = WLAN_EID_PWR_CONSTRAINT
;
194 /* Local Power Constraint */
195 if (local_pwr_constraint
)
196 *pos
++ = local_pwr_constraint
;
198 *pos
++ = hapd
->iconf
->local_pwr_constraint
;
204 static u8
* hostapd_eid_country_add(u8
*pos
, u8
*end
, int chan_spacing
,
205 struct hostapd_channel_data
*start
,
206 struct hostapd_channel_data
*prev
)
211 /* first channel number */
212 *pos
++ = start
->chan
;
213 /* number of channels */
214 *pos
++ = (prev
->chan
- start
->chan
) / chan_spacing
+ 1;
215 /* maximum transmit power level */
216 *pos
++ = start
->max_tx_power
;
222 static u8
* hostapd_eid_country(struct hostapd_data
*hapd
, u8
*eid
,
226 u8
*end
= eid
+ max_len
;
228 struct hostapd_hw_modes
*mode
;
229 struct hostapd_channel_data
*start
, *prev
;
230 int chan_spacing
= 1;
232 if (!hapd
->iconf
->ieee80211d
|| max_len
< 6 ||
233 hapd
->iface
->current_mode
== NULL
)
236 *pos
++ = WLAN_EID_COUNTRY
;
237 pos
++; /* length will be set later */
238 os_memcpy(pos
, hapd
->iconf
->country
, 3); /* e.g., 'US ' */
241 mode
= hapd
->iface
->current_mode
;
242 if (mode
->mode
== HOSTAPD_MODE_IEEE80211A
)
246 for (i
= 0; i
< mode
->num_channels
; i
++) {
247 struct hostapd_channel_data
*chan
= &mode
->channels
[i
];
248 if (chan
->flag
& HOSTAPD_CHAN_DISABLED
)
251 prev
->chan
+ chan_spacing
== chan
->chan
&&
252 start
->max_tx_power
== chan
->max_tx_power
) {
254 continue; /* can use same entry */
258 pos
= hostapd_eid_country_add(pos
, end
, chan_spacing
,
263 /* Start new group */
268 pos
= hostapd_eid_country_add(pos
, end
, chan_spacing
,
272 if ((pos
- eid
) & 1) {
275 *pos
++ = 0; /* pad for 16-bit alignment */
278 eid
[1] = (pos
- eid
) - 2;
284 static u8
* hostapd_eid_wpa(struct hostapd_data
*hapd
, u8
*eid
, size_t len
)
289 ie
= wpa_auth_get_wpa_ie(hapd
->wpa_auth
, &ielen
);
290 if (ie
== NULL
|| ielen
> len
)
293 os_memcpy(eid
, ie
, ielen
);
298 static u8
* hostapd_eid_csa(struct hostapd_data
*hapd
, u8
*eid
)
302 if (!hapd
->cs_freq_params
.freq
)
305 if (ieee80211_freq_to_chan(hapd
->cs_freq_params
.freq
, &chan
) ==
309 *eid
++ = WLAN_EID_CHANNEL_SWITCH
;
311 *eid
++ = hapd
->cs_block_tx
;
313 *eid
++ = hapd
->cs_count
;
319 static u8
* hostapd_eid_secondary_channel(struct hostapd_data
*hapd
, u8
*eid
)
323 if (!hapd
->cs_freq_params
.sec_channel_offset
)
326 if (hapd
->cs_freq_params
.sec_channel_offset
== -1)
327 sec_ch
= HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW
;
328 else if (hapd
->cs_freq_params
.sec_channel_offset
== 1)
329 sec_ch
= HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE
;
333 *eid
++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET
;
341 static u8
* hostapd_add_csa_elems(struct hostapd_data
*hapd
, u8
*pos
,
342 u8
*start
, unsigned int *csa_counter_off
)
346 if (!csa_counter_off
)
349 *csa_counter_off
= 0;
350 pos
= hostapd_eid_csa(hapd
, pos
);
352 if (pos
!= old_pos
) {
353 /* save an offset to the counter - should be last byte */
354 *csa_counter_off
= pos
- start
- 1;
355 pos
= hostapd_eid_secondary_channel(hapd
, pos
);
362 static u8
* hostapd_gen_probe_resp(struct hostapd_data
*hapd
,
363 const struct ieee80211_mgmt
*req
,
364 int is_p2p
, size_t *resp_len
)
366 struct ieee80211_mgmt
*resp
;
370 #define MAX_PROBERESP_LEN 768
371 buflen
= MAX_PROBERESP_LEN
;
373 if (hapd
->wps_probe_resp_ie
)
374 buflen
+= wpabuf_len(hapd
->wps_probe_resp_ie
);
375 #endif /* CONFIG_WPS */
377 if (hapd
->p2p_probe_resp_ie
)
378 buflen
+= wpabuf_len(hapd
->p2p_probe_resp_ie
);
379 #endif /* CONFIG_P2P */
380 if (hapd
->conf
->vendor_elements
)
381 buflen
+= wpabuf_len(hapd
->conf
->vendor_elements
);
382 if (hapd
->conf
->vendor_vht
) {
383 buflen
+= 5 + 2 + sizeof(struct ieee80211_vht_capabilities
) +
384 2 + sizeof(struct ieee80211_vht_operation
);
386 resp
= os_zalloc(buflen
);
390 epos
= ((u8
*) resp
) + MAX_PROBERESP_LEN
;
392 resp
->frame_control
= IEEE80211_FC(WLAN_FC_TYPE_MGMT
,
393 WLAN_FC_STYPE_PROBE_RESP
);
395 os_memcpy(resp
->da
, req
->sa
, ETH_ALEN
);
396 os_memcpy(resp
->sa
, hapd
->own_addr
, ETH_ALEN
);
398 os_memcpy(resp
->bssid
, hapd
->own_addr
, ETH_ALEN
);
399 resp
->u
.probe_resp
.beacon_int
=
400 host_to_le16(hapd
->iconf
->beacon_int
);
402 /* hardware or low-level driver will setup seq_ctrl and timestamp */
403 resp
->u
.probe_resp
.capab_info
=
404 host_to_le16(hostapd_own_capab_info(hapd
));
406 pos
= resp
->u
.probe_resp
.variable
;
407 *pos
++ = WLAN_EID_SSID
;
408 *pos
++ = hapd
->conf
->ssid
.ssid_len
;
409 os_memcpy(pos
, hapd
->conf
->ssid
.ssid
, hapd
->conf
->ssid
.ssid_len
);
410 pos
+= hapd
->conf
->ssid
.ssid_len
;
412 /* Supported rates */
413 pos
= hostapd_eid_supp_rates(hapd
, pos
);
416 pos
= hostapd_eid_ds_params(hapd
, pos
);
418 pos
= hostapd_eid_country(hapd
, pos
, epos
- pos
);
420 /* Power Constraint element */
421 pos
= hostapd_eid_pwr_constraint(hapd
, pos
);
423 /* ERP Information element */
424 pos
= hostapd_eid_erp_info(hapd
, pos
);
426 /* Extended supported rates */
427 pos
= hostapd_eid_ext_supp_rates(hapd
, pos
);
430 pos
= hostapd_eid_wpa(hapd
, pos
, epos
- pos
);
432 pos
= hostapd_eid_bss_load(hapd
, pos
, epos
- pos
);
434 pos
= hostapd_eid_rm_enabled_capab(hapd
, pos
, epos
- pos
);
436 #ifdef CONFIG_IEEE80211N
437 pos
= hostapd_eid_ht_capabilities(hapd
, pos
);
438 pos
= hostapd_eid_ht_operation(hapd
, pos
);
439 #endif /* CONFIG_IEEE80211N */
441 pos
= hostapd_eid_ext_capab(hapd
, pos
);
443 pos
= hostapd_eid_time_adv(hapd
, pos
);
444 pos
= hostapd_eid_time_zone(hapd
, pos
);
446 pos
= hostapd_eid_interworking(hapd
, pos
);
447 pos
= hostapd_eid_adv_proto(hapd
, pos
);
448 pos
= hostapd_eid_roaming_consortium(hapd
, pos
);
450 pos
= hostapd_add_csa_elems(hapd
, pos
, (u8
*)resp
,
451 &hapd
->cs_c_off_proberesp
);
452 #ifdef CONFIG_IEEE80211AC
453 if (hapd
->iconf
->ieee80211ac
&& !hapd
->conf
->disable_11ac
) {
454 pos
= hostapd_eid_vht_capabilities(hapd
, pos
);
455 pos
= hostapd_eid_vht_operation(hapd
, pos
);
457 if (hapd
->conf
->vendor_vht
)
458 pos
= hostapd_eid_vendor_vht(hapd
, pos
);
459 #endif /* CONFIG_IEEE80211AC */
461 /* Wi-Fi Alliance WMM */
462 pos
= hostapd_eid_wmm(hapd
, pos
);
465 if (hapd
->conf
->wps_state
&& hapd
->wps_probe_resp_ie
) {
466 os_memcpy(pos
, wpabuf_head(hapd
->wps_probe_resp_ie
),
467 wpabuf_len(hapd
->wps_probe_resp_ie
));
468 pos
+= wpabuf_len(hapd
->wps_probe_resp_ie
);
470 #endif /* CONFIG_WPS */
473 if ((hapd
->conf
->p2p
& P2P_ENABLED
) && is_p2p
&&
474 hapd
->p2p_probe_resp_ie
) {
475 os_memcpy(pos
, wpabuf_head(hapd
->p2p_probe_resp_ie
),
476 wpabuf_len(hapd
->p2p_probe_resp_ie
));
477 pos
+= wpabuf_len(hapd
->p2p_probe_resp_ie
);
479 #endif /* CONFIG_P2P */
480 #ifdef CONFIG_P2P_MANAGER
481 if ((hapd
->conf
->p2p
& (P2P_MANAGE
| P2P_ENABLED
| P2P_GROUP_OWNER
)) ==
483 pos
= hostapd_eid_p2p_manage(hapd
, pos
);
484 #endif /* CONFIG_P2P_MANAGER */
487 pos
= hostapd_eid_hs20_indication(hapd
, pos
);
488 pos
= hostapd_eid_osen(hapd
, pos
);
489 #endif /* CONFIG_HS20 */
491 if (hapd
->conf
->vendor_elements
) {
492 os_memcpy(pos
, wpabuf_head(hapd
->conf
->vendor_elements
),
493 wpabuf_len(hapd
->conf
->vendor_elements
));
494 pos
+= wpabuf_len(hapd
->conf
->vendor_elements
);
497 *resp_len
= pos
- (u8
*) resp
;
502 enum ssid_match_result
{
508 static enum ssid_match_result
ssid_match(struct hostapd_data
*hapd
,
509 const u8
*ssid
, size_t ssid_len
,
511 size_t ssid_list_len
)
518 if (ssid_len
== hapd
->conf
->ssid
.ssid_len
&&
519 os_memcmp(ssid
, hapd
->conf
->ssid
.ssid
, ssid_len
) == 0)
520 return EXACT_SSID_MATCH
;
522 if (ssid_list
== NULL
)
523 return wildcard
? WILDCARD_SSID_MATCH
: NO_SSID_MATCH
;
526 end
= ssid_list
+ ssid_list_len
;
527 while (pos
+ 1 <= end
) {
528 if (pos
+ 2 + pos
[1] > end
)
532 if (pos
[1] == hapd
->conf
->ssid
.ssid_len
&&
533 os_memcmp(pos
+ 2, hapd
->conf
->ssid
.ssid
, pos
[1]) == 0)
534 return EXACT_SSID_MATCH
;
538 return wildcard
? WILDCARD_SSID_MATCH
: NO_SSID_MATCH
;
542 void handle_probe_req(struct hostapd_data
*hapd
,
543 const struct ieee80211_mgmt
*mgmt
, size_t len
,
547 struct ieee802_11_elems elems
;
552 enum ssid_match_result res
;
554 ie
= mgmt
->u
.probe_req
.variable
;
555 if (len
< IEEE80211_HDRLEN
+ sizeof(mgmt
->u
.probe_req
))
557 ie_len
= len
- (IEEE80211_HDRLEN
+ sizeof(mgmt
->u
.probe_req
));
559 for (i
= 0; hapd
->probereq_cb
&& i
< hapd
->num_probereq_cb
; i
++)
560 if (hapd
->probereq_cb
[i
].cb(hapd
->probereq_cb
[i
].ctx
,
561 mgmt
->sa
, mgmt
->da
, mgmt
->bssid
,
562 ie
, ie_len
, ssi_signal
) > 0)
565 if (!hapd
->iconf
->send_probe_response
)
568 if (ieee802_11_parse_elems(ie
, ie_len
, &elems
, 0) == ParseFailed
) {
569 wpa_printf(MSG_DEBUG
, "Could not parse ProbeReq from " MACSTR
,
574 if ((!elems
.ssid
|| !elems
.supp_rates
)) {
575 wpa_printf(MSG_DEBUG
, "STA " MACSTR
" sent probe request "
576 "without SSID or supported rates element",
582 * No need to reply if the Probe Request frame was sent on an adjacent
583 * channel. IEEE Std 802.11-2012 describes this as a requirement for an
584 * AP with dot11RadioMeasurementActivated set to true, but strictly
585 * speaking does not allow such ignoring of Probe Request frames if
586 * dot11RadioMeasurementActivated is false. Anyway, this can help reduce
587 * number of unnecessary Probe Response frames for cases where the STA
588 * is less likely to see them (Probe Request frame sent on a
589 * neighboring, but partially overlapping, channel).
591 if (elems
.ds_params
&& elems
.ds_params_len
== 1 &&
592 hapd
->iface
->current_mode
&&
593 (hapd
->iface
->current_mode
->mode
== HOSTAPD_MODE_IEEE80211G
||
594 hapd
->iface
->current_mode
->mode
== HOSTAPD_MODE_IEEE80211B
) &&
595 hapd
->iconf
->channel
!= elems
.ds_params
[0]) {
596 wpa_printf(MSG_DEBUG
,
597 "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u",
598 hapd
->iconf
->channel
, elems
.ds_params
[0]);
603 if (hapd
->p2p
&& elems
.wps_ie
) {
605 wps
= ieee802_11_vendor_ie_concat(ie
, ie_len
, WPS_DEV_OUI_WFA
);
606 if (wps
&& !p2p_group_match_dev_type(hapd
->p2p_group
, wps
)) {
607 wpa_printf(MSG_MSGDUMP
, "P2P: Ignore Probe Request "
608 "due to mismatch with Requested Device "
616 if (hapd
->p2p
&& elems
.p2p
) {
618 p2p
= ieee802_11_vendor_ie_concat(ie
, ie_len
, P2P_IE_VENDOR_TYPE
);
619 if (p2p
&& !p2p_group_match_dev_id(hapd
->p2p_group
, p2p
)) {
620 wpa_printf(MSG_MSGDUMP
, "P2P: Ignore Probe Request "
621 "due to mismatch with Device ID");
627 #endif /* CONFIG_P2P */
629 if (hapd
->conf
->ignore_broadcast_ssid
&& elems
.ssid_len
== 0 &&
630 elems
.ssid_list_len
== 0) {
631 wpa_printf(MSG_MSGDUMP
, "Probe Request from " MACSTR
" for "
632 "broadcast SSID ignored", MAC2STR(mgmt
->sa
));
637 if ((hapd
->conf
->p2p
& P2P_GROUP_OWNER
) &&
638 elems
.ssid_len
== P2P_WILDCARD_SSID_LEN
&&
639 os_memcmp(elems
.ssid
, P2P_WILDCARD_SSID
,
640 P2P_WILDCARD_SSID_LEN
) == 0) {
641 /* Process P2P Wildcard SSID like Wildcard SSID */
644 #endif /* CONFIG_P2P */
646 res
= ssid_match(hapd
, elems
.ssid
, elems
.ssid_len
,
647 elems
.ssid_list
, elems
.ssid_list_len
);
648 if (res
== NO_SSID_MATCH
) {
649 if (!(mgmt
->da
[0] & 0x01)) {
650 wpa_printf(MSG_MSGDUMP
, "Probe Request from " MACSTR
651 " for foreign SSID '%s' (DA " MACSTR
")%s",
653 wpa_ssid_txt(elems
.ssid
, elems
.ssid_len
),
655 elems
.ssid_list
? " (SSID list)" : "");
660 #ifdef CONFIG_INTERWORKING
661 if (hapd
->conf
->interworking
&&
662 elems
.interworking
&& elems
.interworking_len
>= 1) {
663 u8 ant
= elems
.interworking
[0] & 0x0f;
664 if (ant
!= INTERWORKING_ANT_WILDCARD
&&
665 ant
!= hapd
->conf
->access_network_type
) {
666 wpa_printf(MSG_MSGDUMP
, "Probe Request from " MACSTR
667 " for mismatching ANT %u ignored",
668 MAC2STR(mgmt
->sa
), ant
);
673 if (hapd
->conf
->interworking
&& elems
.interworking
&&
674 (elems
.interworking_len
== 7 || elems
.interworking_len
== 9)) {
676 if (elems
.interworking_len
== 7)
677 hessid
= elems
.interworking
+ 1;
679 hessid
= elems
.interworking
+ 1 + 2;
680 if (!is_broadcast_ether_addr(hessid
) &&
681 os_memcmp(hessid
, hapd
->conf
->hessid
, ETH_ALEN
) != 0) {
682 wpa_printf(MSG_MSGDUMP
, "Probe Request from " MACSTR
683 " for mismatching HESSID " MACSTR
685 MAC2STR(mgmt
->sa
), MAC2STR(hessid
));
689 #endif /* CONFIG_INTERWORKING */
692 if ((hapd
->conf
->p2p
& P2P_GROUP_OWNER
) &&
693 supp_rates_11b_only(&elems
)) {
694 /* Indicates support for 11b rates only */
695 wpa_printf(MSG_EXCESSIVE
, "P2P: Ignore Probe Request from "
696 MACSTR
" with only 802.11b rates",
700 #endif /* CONFIG_P2P */
702 /* TODO: verify that supp_rates contains at least one matching rate
703 * with AP configuration */
705 #ifdef CONFIG_TESTING_OPTIONS
706 if (hapd
->iconf
->ignore_probe_probability
> 0.0 &&
707 drand48() < hapd
->iconf
->ignore_probe_probability
) {
709 "TESTING: ignoring probe request from " MACSTR
,
713 #endif /* CONFIG_TESTING_OPTIONS */
715 resp
= hostapd_gen_probe_resp(hapd
, mgmt
, elems
.p2p
!= NULL
,
721 * If this is a broadcast probe request, apply no ack policy to avoid
724 noack
= !!(res
== WILDCARD_SSID_MATCH
&&
725 is_broadcast_ether_addr(mgmt
->da
));
727 if (hostapd_drv_send_mlme(hapd
, resp
, resp_len
, noack
) < 0)
728 wpa_printf(MSG_INFO
, "handle_probe_req: send failed");
732 wpa_printf(MSG_EXCESSIVE
, "STA " MACSTR
" sent probe request for %s "
733 "SSID", MAC2STR(mgmt
->sa
),
734 elems
.ssid_len
== 0 ? "broadcast" : "our");
738 static u8
* hostapd_probe_resp_offloads(struct hostapd_data
*hapd
,
741 /* check probe response offloading caps and print warnings */
742 if (!(hapd
->iface
->drv_flags
& WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD
))
746 if (hapd
->conf
->wps_state
&& hapd
->wps_probe_resp_ie
&&
747 (!(hapd
->iface
->probe_resp_offloads
&
748 (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS
|
749 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2
))))
750 wpa_printf(MSG_WARNING
, "Device is trying to offload WPS "
751 "Probe Response while not supporting this");
752 #endif /* CONFIG_WPS */
755 if ((hapd
->conf
->p2p
& P2P_ENABLED
) && hapd
->p2p_probe_resp_ie
&&
756 !(hapd
->iface
->probe_resp_offloads
&
757 WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P
))
758 wpa_printf(MSG_WARNING
, "Device is trying to offload P2P "
759 "Probe Response while not supporting this");
760 #endif /* CONFIG_P2P */
762 if (hapd
->conf
->interworking
&&
763 !(hapd
->iface
->probe_resp_offloads
&
764 WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING
))
765 wpa_printf(MSG_WARNING
, "Device is trying to offload "
766 "Interworking Probe Response while not supporting "
769 /* Generate a Probe Response template for the non-P2P case */
770 return hostapd_gen_probe_resp(hapd
, NULL
, 0, resp_len
);
773 #endif /* NEED_AP_MLME */
776 int ieee802_11_build_ap_params(struct hostapd_data
*hapd
,
777 struct wpa_driver_ap_params
*params
)
779 struct ieee80211_mgmt
*head
= NULL
;
781 size_t head_len
= 0, tail_len
= 0;
788 #define BEACON_HEAD_BUF_SIZE 256
789 #define BEACON_TAIL_BUF_SIZE 512
790 head
= os_zalloc(BEACON_HEAD_BUF_SIZE
);
791 tail_len
= BEACON_TAIL_BUF_SIZE
;
793 if (hapd
->conf
->wps_state
&& hapd
->wps_beacon_ie
)
794 tail_len
+= wpabuf_len(hapd
->wps_beacon_ie
);
795 #endif /* CONFIG_WPS */
797 if (hapd
->p2p_beacon_ie
)
798 tail_len
+= wpabuf_len(hapd
->p2p_beacon_ie
);
799 #endif /* CONFIG_P2P */
800 if (hapd
->conf
->vendor_elements
)
801 tail_len
+= wpabuf_len(hapd
->conf
->vendor_elements
);
803 #ifdef CONFIG_IEEE80211AC
804 if (hapd
->conf
->vendor_vht
) {
805 tail_len
+= 5 + 2 + sizeof(struct ieee80211_vht_capabilities
) +
806 2 + sizeof(struct ieee80211_vht_operation
);
808 #endif /* CONFIG_IEEE80211AC */
810 tailpos
= tail
= os_malloc(tail_len
);
811 if (head
== NULL
|| tail
== NULL
) {
812 wpa_printf(MSG_ERROR
, "Failed to set beacon data");
818 head
->frame_control
= IEEE80211_FC(WLAN_FC_TYPE_MGMT
,
819 WLAN_FC_STYPE_BEACON
);
820 head
->duration
= host_to_le16(0);
821 os_memset(head
->da
, 0xff, ETH_ALEN
);
823 os_memcpy(head
->sa
, hapd
->own_addr
, ETH_ALEN
);
824 os_memcpy(head
->bssid
, hapd
->own_addr
, ETH_ALEN
);
825 head
->u
.beacon
.beacon_int
=
826 host_to_le16(hapd
->iconf
->beacon_int
);
828 /* hardware or low-level driver will setup seq_ctrl and timestamp */
829 capab_info
= hostapd_own_capab_info(hapd
);
830 head
->u
.beacon
.capab_info
= host_to_le16(capab_info
);
831 pos
= &head
->u
.beacon
.variable
[0];
834 *pos
++ = WLAN_EID_SSID
;
835 if (hapd
->conf
->ignore_broadcast_ssid
== 2) {
836 /* clear the data, but keep the correct length of the SSID */
837 *pos
++ = hapd
->conf
->ssid
.ssid_len
;
838 os_memset(pos
, 0, hapd
->conf
->ssid
.ssid_len
);
839 pos
+= hapd
->conf
->ssid
.ssid_len
;
840 } else if (hapd
->conf
->ignore_broadcast_ssid
) {
841 *pos
++ = 0; /* empty SSID */
843 *pos
++ = hapd
->conf
->ssid
.ssid_len
;
844 os_memcpy(pos
, hapd
->conf
->ssid
.ssid
,
845 hapd
->conf
->ssid
.ssid_len
);
846 pos
+= hapd
->conf
->ssid
.ssid_len
;
849 /* Supported rates */
850 pos
= hostapd_eid_supp_rates(hapd
, pos
);
853 pos
= hostapd_eid_ds_params(hapd
, pos
);
855 head_len
= pos
- (u8
*) head
;
857 tailpos
= hostapd_eid_country(hapd
, tailpos
,
858 tail
+ BEACON_TAIL_BUF_SIZE
- tailpos
);
860 /* Power Constraint element */
861 tailpos
= hostapd_eid_pwr_constraint(hapd
, tailpos
);
863 /* ERP Information element */
864 tailpos
= hostapd_eid_erp_info(hapd
, tailpos
);
866 /* Extended supported rates */
867 tailpos
= hostapd_eid_ext_supp_rates(hapd
, tailpos
);
870 tailpos
= hostapd_eid_wpa(hapd
, tailpos
, tail
+ BEACON_TAIL_BUF_SIZE
-
873 tailpos
= hostapd_eid_rm_enabled_capab(hapd
, tailpos
,
874 tail
+ BEACON_TAIL_BUF_SIZE
-
877 tailpos
= hostapd_eid_bss_load(hapd
, tailpos
,
878 tail
+ BEACON_TAIL_BUF_SIZE
- tailpos
);
880 #ifdef CONFIG_IEEE80211N
881 tailpos
= hostapd_eid_ht_capabilities(hapd
, tailpos
);
882 tailpos
= hostapd_eid_ht_operation(hapd
, tailpos
);
883 #endif /* CONFIG_IEEE80211N */
885 tailpos
= hostapd_eid_ext_capab(hapd
, tailpos
);
888 * TODO: Time Advertisement element should only be included in some
889 * DTIM Beacon frames.
891 tailpos
= hostapd_eid_time_adv(hapd
, tailpos
);
893 tailpos
= hostapd_eid_interworking(hapd
, tailpos
);
894 tailpos
= hostapd_eid_adv_proto(hapd
, tailpos
);
895 tailpos
= hostapd_eid_roaming_consortium(hapd
, tailpos
);
896 tailpos
= hostapd_add_csa_elems(hapd
, tailpos
, tail
,
897 &hapd
->cs_c_off_beacon
);
898 #ifdef CONFIG_IEEE80211AC
899 if (hapd
->iconf
->ieee80211ac
&& !hapd
->conf
->disable_11ac
) {
900 tailpos
= hostapd_eid_vht_capabilities(hapd
, tailpos
);
901 tailpos
= hostapd_eid_vht_operation(hapd
, tailpos
);
903 if (hapd
->conf
->vendor_vht
)
904 tailpos
= hostapd_eid_vendor_vht(hapd
, tailpos
);
905 #endif /* CONFIG_IEEE80211AC */
907 /* Wi-Fi Alliance WMM */
908 tailpos
= hostapd_eid_wmm(hapd
, tailpos
);
911 if (hapd
->conf
->wps_state
&& hapd
->wps_beacon_ie
) {
912 os_memcpy(tailpos
, wpabuf_head(hapd
->wps_beacon_ie
),
913 wpabuf_len(hapd
->wps_beacon_ie
));
914 tailpos
+= wpabuf_len(hapd
->wps_beacon_ie
);
916 #endif /* CONFIG_WPS */
919 if ((hapd
->conf
->p2p
& P2P_ENABLED
) && hapd
->p2p_beacon_ie
) {
920 os_memcpy(tailpos
, wpabuf_head(hapd
->p2p_beacon_ie
),
921 wpabuf_len(hapd
->p2p_beacon_ie
));
922 tailpos
+= wpabuf_len(hapd
->p2p_beacon_ie
);
924 #endif /* CONFIG_P2P */
925 #ifdef CONFIG_P2P_MANAGER
926 if ((hapd
->conf
->p2p
& (P2P_MANAGE
| P2P_ENABLED
| P2P_GROUP_OWNER
)) ==
928 tailpos
= hostapd_eid_p2p_manage(hapd
, tailpos
);
929 #endif /* CONFIG_P2P_MANAGER */
932 tailpos
= hostapd_eid_hs20_indication(hapd
, tailpos
);
933 tailpos
= hostapd_eid_osen(hapd
, tailpos
);
934 #endif /* CONFIG_HS20 */
936 if (hapd
->conf
->vendor_elements
) {
937 os_memcpy(tailpos
, wpabuf_head(hapd
->conf
->vendor_elements
),
938 wpabuf_len(hapd
->conf
->vendor_elements
));
939 tailpos
+= wpabuf_len(hapd
->conf
->vendor_elements
);
942 tail_len
= tailpos
> tail
? tailpos
- tail
: 0;
944 resp
= hostapd_probe_resp_offloads(hapd
, &resp_len
);
945 #endif /* NEED_AP_MLME */
947 os_memset(params
, 0, sizeof(*params
));
948 params
->head
= (u8
*) head
;
949 params
->head_len
= head_len
;
951 params
->tail_len
= tail_len
;
952 params
->proberesp
= resp
;
953 params
->proberesp_len
= resp_len
;
954 params
->dtim_period
= hapd
->conf
->dtim_period
;
955 params
->beacon_int
= hapd
->iconf
->beacon_int
;
956 params
->basic_rates
= hapd
->iface
->basic_rates
;
957 params
->ssid
= hapd
->conf
->ssid
.ssid
;
958 params
->ssid_len
= hapd
->conf
->ssid
.ssid_len
;
959 params
->pairwise_ciphers
= hapd
->conf
->wpa_pairwise
|
960 hapd
->conf
->rsn_pairwise
;
961 params
->group_cipher
= hapd
->conf
->wpa_group
;
962 params
->key_mgmt_suites
= hapd
->conf
->wpa_key_mgmt
;
963 params
->auth_algs
= hapd
->conf
->auth_algs
;
964 params
->wpa_version
= hapd
->conf
->wpa
;
965 params
->privacy
= hapd
->conf
->ssid
.wep
.keys_set
|| hapd
->conf
->wpa
||
966 (hapd
->conf
->ieee802_1x
&&
967 (hapd
->conf
->default_wep_key_len
||
968 hapd
->conf
->individual_wep_key_len
));
969 switch (hapd
->conf
->ignore_broadcast_ssid
) {
971 params
->hide_ssid
= NO_SSID_HIDING
;
974 params
->hide_ssid
= HIDDEN_SSID_ZERO_LEN
;
977 params
->hide_ssid
= HIDDEN_SSID_ZERO_CONTENTS
;
980 params
->isolate
= hapd
->conf
->isolate
;
981 params
->smps_mode
= hapd
->iconf
->ht_capab
& HT_CAP_INFO_SMPS_MASK
;
983 params
->cts_protect
= !!(ieee802_11_erp_info(hapd
) &
984 ERP_INFO_USE_PROTECTION
);
985 params
->preamble
= hapd
->iface
->num_sta_no_short_preamble
== 0 &&
986 hapd
->iconf
->preamble
== SHORT_PREAMBLE
;
987 if (hapd
->iface
->current_mode
&&
988 hapd
->iface
->current_mode
->mode
== HOSTAPD_MODE_IEEE80211G
)
989 params
->short_slot_time
=
990 hapd
->iface
->num_sta_no_short_slot_time
> 0 ? 0 : 1;
992 params
->short_slot_time
= -1;
993 if (!hapd
->iconf
->ieee80211n
|| hapd
->conf
->disable_11n
)
994 params
->ht_opmode
= -1;
996 params
->ht_opmode
= hapd
->iface
->ht_op_mode
;
997 #endif /* NEED_AP_MLME */
998 params
->interworking
= hapd
->conf
->interworking
;
999 if (hapd
->conf
->interworking
&&
1000 !is_zero_ether_addr(hapd
->conf
->hessid
))
1001 params
->hessid
= hapd
->conf
->hessid
;
1002 params
->access_network_type
= hapd
->conf
->access_network_type
;
1003 params
->ap_max_inactivity
= hapd
->conf
->ap_max_inactivity
;
1005 params
->p2p_go_ctwindow
= hapd
->iconf
->p2p_go_ctwindow
;
1006 #endif /* CONFIG_P2P */
1008 params
->disable_dgaf
= hapd
->conf
->disable_dgaf
;
1009 if (hapd
->conf
->osen
) {
1010 params
->privacy
= 1;
1013 #endif /* CONFIG_HS20 */
1018 void ieee802_11_free_ap_params(struct wpa_driver_ap_params
*params
)
1020 os_free(params
->tail
);
1021 params
->tail
= NULL
;
1022 os_free(params
->head
);
1023 params
->head
= NULL
;
1024 os_free(params
->proberesp
);
1025 params
->proberesp
= NULL
;
1029 int ieee802_11_set_beacon(struct hostapd_data
*hapd
)
1031 struct wpa_driver_ap_params params
;
1032 struct hostapd_freq_params freq
;
1033 struct hostapd_iface
*iface
= hapd
->iface
;
1034 struct hostapd_config
*iconf
= iface
->conf
;
1035 struct wpabuf
*beacon
, *proberesp
, *assocresp
;
1038 if (hapd
->csa_in_progress
) {
1039 wpa_printf(MSG_ERROR
, "Cannot set beacons during CSA period");
1043 hapd
->beacon_set_done
= 1;
1045 if (ieee802_11_build_ap_params(hapd
, ¶ms
) < 0)
1048 if (hostapd_build_ap_extra_ies(hapd
, &beacon
, &proberesp
, &assocresp
) <
1052 params
.beacon_ies
= beacon
;
1053 params
.proberesp_ies
= proberesp
;
1054 params
.assocresp_ies
= assocresp
;
1055 params
.reenable
= hapd
->reenable_beacon
;
1056 hapd
->reenable_beacon
= 0;
1058 if (iface
->current_mode
&&
1059 hostapd_set_freq_params(&freq
, iconf
->hw_mode
, iface
->freq
,
1060 iconf
->channel
, iconf
->ieee80211n
,
1062 iconf
->secondary_channel
,
1063 iconf
->vht_oper_chwidth
,
1064 iconf
->vht_oper_centr_freq_seg0_idx
,
1065 iconf
->vht_oper_centr_freq_seg1_idx
,
1066 iface
->current_mode
->vht_capab
) == 0)
1067 params
.freq
= &freq
;
1069 res
= hostapd_drv_set_ap(hapd
, ¶ms
);
1070 hostapd_free_ap_extra_ies(hapd
, beacon
, proberesp
, assocresp
);
1072 wpa_printf(MSG_ERROR
, "Failed to set beacon parameters");
1076 ieee802_11_free_ap_params(¶ms
);
1081 int ieee802_11_set_beacons(struct hostapd_iface
*iface
)
1086 for (i
= 0; i
< iface
->num_bss
; i
++) {
1087 if (iface
->bss
[i
]->started
&&
1088 ieee802_11_set_beacon(iface
->bss
[i
]) < 0)
1096 /* only update beacons if started */
1097 int ieee802_11_update_beacons(struct hostapd_iface
*iface
)
1102 for (i
= 0; i
< iface
->num_bss
; i
++) {
1103 if (iface
->bss
[i
]->beacon_set_done
&& iface
->bss
[i
]->started
&&
1104 ieee802_11_set_beacon(iface
->bss
[i
]) < 0)
1111 #endif /* CONFIG_NATIVE_WINDOWS */