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
)
300 if (!hapd
->cs_freq_params
.channel
)
303 *eid
++ = WLAN_EID_CHANNEL_SWITCH
;
305 *eid
++ = hapd
->cs_block_tx
;
306 *eid
++ = hapd
->cs_freq_params
.channel
;
307 *eid
++ = hapd
->cs_count
;
313 static u8
* hostapd_eid_ecsa(struct hostapd_data
*hapd
, u8
*eid
)
315 if (!hapd
->cs_freq_params
.channel
|| !hapd
->iface
->cs_oper_class
)
318 *eid
++ = WLAN_EID_EXT_CHANSWITCH_ANN
;
320 *eid
++ = hapd
->cs_block_tx
;
321 *eid
++ = hapd
->iface
->cs_oper_class
;
322 *eid
++ = hapd
->cs_freq_params
.channel
;
323 *eid
++ = hapd
->cs_count
;
329 static u8
* hostapd_eid_secondary_channel(struct hostapd_data
*hapd
, u8
*eid
)
333 if (!hapd
->cs_freq_params
.sec_channel_offset
)
336 if (hapd
->cs_freq_params
.sec_channel_offset
== -1)
337 sec_ch
= HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW
;
338 else if (hapd
->cs_freq_params
.sec_channel_offset
== 1)
339 sec_ch
= HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE
;
343 *eid
++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET
;
351 static u8
* hostapd_add_csa_elems(struct hostapd_data
*hapd
, u8
*pos
,
352 u8
*start
, unsigned int *csa_counter_off
,
353 unsigned int *ecsa_counter_off
)
358 if (!csa_counter_off
|| !ecsa_counter_off
)
361 *csa_counter_off
= 0;
362 *ecsa_counter_off
= 0;
364 curr_pos
= hostapd_eid_csa(hapd
, curr_pos
);
366 /* save an offset to the csa counter - should be last byte */
368 *csa_counter_off
= curr_pos
- start
- 1;
371 curr_pos
= hostapd_eid_ecsa(hapd
, curr_pos
);
373 /* save an offset to the eCSA counter - should be last byte */
374 if (curr_pos
!= csa_pos
)
375 *ecsa_counter_off
= curr_pos
- start
- 1;
377 /* at least one of ies is added */
378 if (pos
!= curr_pos
) {
379 curr_pos
= hostapd_eid_secondary_channel(hapd
, curr_pos
);
380 #ifdef CONFIG_IEEE80211AC
381 curr_pos
= hostapd_eid_wb_chsw_wrapper(hapd
, curr_pos
);
382 #endif /* CONFIG_IEEE80211AC */
388 static u8
* hostapd_gen_probe_resp(struct hostapd_data
*hapd
,
389 const struct ieee80211_mgmt
*req
,
390 int is_p2p
, size_t *resp_len
)
392 struct ieee80211_mgmt
*resp
;
396 #define MAX_PROBERESP_LEN 768
397 buflen
= MAX_PROBERESP_LEN
;
399 if (hapd
->wps_probe_resp_ie
)
400 buflen
+= wpabuf_len(hapd
->wps_probe_resp_ie
);
401 #endif /* CONFIG_WPS */
403 if (hapd
->p2p_probe_resp_ie
)
404 buflen
+= wpabuf_len(hapd
->p2p_probe_resp_ie
);
405 #endif /* CONFIG_P2P */
407 if (hapd
->iface
->fst_ies
)
408 buflen
+= wpabuf_len(hapd
->iface
->fst_ies
);
409 #endif /* CONFIG_FST */
410 if (hapd
->conf
->vendor_elements
)
411 buflen
+= wpabuf_len(hapd
->conf
->vendor_elements
);
412 if (hapd
->conf
->vendor_vht
) {
413 buflen
+= 5 + 2 + sizeof(struct ieee80211_vht_capabilities
) +
414 2 + sizeof(struct ieee80211_vht_operation
);
416 resp
= os_zalloc(buflen
);
420 epos
= ((u8
*) resp
) + MAX_PROBERESP_LEN
;
422 resp
->frame_control
= IEEE80211_FC(WLAN_FC_TYPE_MGMT
,
423 WLAN_FC_STYPE_PROBE_RESP
);
425 os_memcpy(resp
->da
, req
->sa
, ETH_ALEN
);
426 os_memcpy(resp
->sa
, hapd
->own_addr
, ETH_ALEN
);
428 os_memcpy(resp
->bssid
, hapd
->own_addr
, ETH_ALEN
);
429 resp
->u
.probe_resp
.beacon_int
=
430 host_to_le16(hapd
->iconf
->beacon_int
);
432 /* hardware or low-level driver will setup seq_ctrl and timestamp */
433 resp
->u
.probe_resp
.capab_info
=
434 host_to_le16(hostapd_own_capab_info(hapd
));
436 pos
= resp
->u
.probe_resp
.variable
;
437 *pos
++ = WLAN_EID_SSID
;
438 *pos
++ = hapd
->conf
->ssid
.ssid_len
;
439 os_memcpy(pos
, hapd
->conf
->ssid
.ssid
, hapd
->conf
->ssid
.ssid_len
);
440 pos
+= hapd
->conf
->ssid
.ssid_len
;
442 /* Supported rates */
443 pos
= hostapd_eid_supp_rates(hapd
, pos
);
446 pos
= hostapd_eid_ds_params(hapd
, pos
);
448 pos
= hostapd_eid_country(hapd
, pos
, epos
- pos
);
450 /* Power Constraint element */
451 pos
= hostapd_eid_pwr_constraint(hapd
, pos
);
453 /* ERP Information element */
454 pos
= hostapd_eid_erp_info(hapd
, pos
);
456 /* Extended supported rates */
457 pos
= hostapd_eid_ext_supp_rates(hapd
, pos
);
460 pos
= hostapd_eid_wpa(hapd
, pos
, epos
- pos
);
462 pos
= hostapd_eid_bss_load(hapd
, pos
, epos
- pos
);
464 pos
= hostapd_eid_rm_enabled_capab(hapd
, pos
, epos
- pos
);
466 #ifdef CONFIG_IEEE80211N
467 pos
= hostapd_eid_ht_capabilities(hapd
, pos
);
468 pos
= hostapd_eid_ht_operation(hapd
, pos
);
469 #endif /* CONFIG_IEEE80211N */
471 pos
= hostapd_eid_ext_capab(hapd
, pos
);
473 pos
= hostapd_eid_time_adv(hapd
, pos
);
474 pos
= hostapd_eid_time_zone(hapd
, pos
);
476 pos
= hostapd_eid_interworking(hapd
, pos
);
477 pos
= hostapd_eid_adv_proto(hapd
, pos
);
478 pos
= hostapd_eid_roaming_consortium(hapd
, pos
);
480 pos
= hostapd_add_csa_elems(hapd
, pos
, (u8
*)resp
,
481 &hapd
->cs_c_off_proberesp
,
482 &hapd
->cs_c_off_ecsa_proberesp
);
485 if (hapd
->iface
->fst_ies
) {
486 os_memcpy(pos
, wpabuf_head(hapd
->iface
->fst_ies
),
487 wpabuf_len(hapd
->iface
->fst_ies
));
488 pos
+= wpabuf_len(hapd
->iface
->fst_ies
);
490 #endif /* CONFIG_FST */
492 #ifdef CONFIG_IEEE80211AC
493 if (hapd
->iconf
->ieee80211ac
&& !hapd
->conf
->disable_11ac
) {
494 pos
= hostapd_eid_vht_capabilities(hapd
, pos
);
495 pos
= hostapd_eid_vht_operation(hapd
, pos
);
497 if (hapd
->conf
->vendor_vht
)
498 pos
= hostapd_eid_vendor_vht(hapd
, pos
);
499 #endif /* CONFIG_IEEE80211AC */
501 /* Wi-Fi Alliance WMM */
502 pos
= hostapd_eid_wmm(hapd
, pos
);
505 if (hapd
->conf
->wps_state
&& hapd
->wps_probe_resp_ie
) {
506 os_memcpy(pos
, wpabuf_head(hapd
->wps_probe_resp_ie
),
507 wpabuf_len(hapd
->wps_probe_resp_ie
));
508 pos
+= wpabuf_len(hapd
->wps_probe_resp_ie
);
510 #endif /* CONFIG_WPS */
513 if ((hapd
->conf
->p2p
& P2P_ENABLED
) && is_p2p
&&
514 hapd
->p2p_probe_resp_ie
) {
515 os_memcpy(pos
, wpabuf_head(hapd
->p2p_probe_resp_ie
),
516 wpabuf_len(hapd
->p2p_probe_resp_ie
));
517 pos
+= wpabuf_len(hapd
->p2p_probe_resp_ie
);
519 #endif /* CONFIG_P2P */
520 #ifdef CONFIG_P2P_MANAGER
521 if ((hapd
->conf
->p2p
& (P2P_MANAGE
| P2P_ENABLED
| P2P_GROUP_OWNER
)) ==
523 pos
= hostapd_eid_p2p_manage(hapd
, pos
);
524 #endif /* CONFIG_P2P_MANAGER */
527 pos
= hostapd_eid_hs20_indication(hapd
, pos
);
528 pos
= hostapd_eid_osen(hapd
, pos
);
529 #endif /* CONFIG_HS20 */
531 if (hapd
->conf
->vendor_elements
) {
532 os_memcpy(pos
, wpabuf_head(hapd
->conf
->vendor_elements
),
533 wpabuf_len(hapd
->conf
->vendor_elements
));
534 pos
+= wpabuf_len(hapd
->conf
->vendor_elements
);
537 *resp_len
= pos
- (u8
*) resp
;
542 enum ssid_match_result
{
548 static enum ssid_match_result
ssid_match(struct hostapd_data
*hapd
,
549 const u8
*ssid
, size_t ssid_len
,
551 size_t ssid_list_len
)
558 if (ssid_len
== hapd
->conf
->ssid
.ssid_len
&&
559 os_memcmp(ssid
, hapd
->conf
->ssid
.ssid
, ssid_len
) == 0)
560 return EXACT_SSID_MATCH
;
562 if (ssid_list
== NULL
)
563 return wildcard
? WILDCARD_SSID_MATCH
: NO_SSID_MATCH
;
566 end
= ssid_list
+ ssid_list_len
;
567 while (pos
+ 1 <= end
) {
568 if (pos
+ 2 + pos
[1] > end
)
572 if (pos
[1] == hapd
->conf
->ssid
.ssid_len
&&
573 os_memcmp(pos
+ 2, hapd
->conf
->ssid
.ssid
, pos
[1]) == 0)
574 return EXACT_SSID_MATCH
;
578 return wildcard
? WILDCARD_SSID_MATCH
: NO_SSID_MATCH
;
582 void sta_track_expire(struct hostapd_iface
*iface
, int force
)
584 struct os_reltime now
;
585 struct hostapd_sta_info
*info
;
587 if (!iface
->num_sta_seen
)
590 os_get_reltime(&now
);
591 while ((info
= dl_list_first(&iface
->sta_seen
, struct hostapd_sta_info
,
594 !os_reltime_expired(&now
, &info
->last_seen
,
595 iface
->conf
->track_sta_max_age
))
599 wpa_printf(MSG_MSGDUMP
, "%s: Expire STA tracking entry for "
600 MACSTR
, iface
->bss
[0]->conf
->iface
,
601 MAC2STR(info
->addr
));
602 dl_list_del(&info
->list
);
603 iface
->num_sta_seen
--;
609 static struct hostapd_sta_info
* sta_track_get(struct hostapd_iface
*iface
,
612 struct hostapd_sta_info
*info
;
614 dl_list_for_each(info
, &iface
->sta_seen
, struct hostapd_sta_info
, list
)
615 if (os_memcmp(addr
, info
->addr
, ETH_ALEN
) == 0)
622 void sta_track_add(struct hostapd_iface
*iface
, const u8
*addr
)
624 struct hostapd_sta_info
*info
;
626 info
= sta_track_get(iface
, addr
);
628 /* Move the most recent entry to the end of the list */
629 dl_list_del(&info
->list
);
630 dl_list_add_tail(&iface
->sta_seen
, &info
->list
);
631 os_get_reltime(&info
->last_seen
);
635 /* Add a new entry */
636 info
= os_zalloc(sizeof(*info
));
637 os_memcpy(info
->addr
, addr
, ETH_ALEN
);
638 os_get_reltime(&info
->last_seen
);
640 if (iface
->num_sta_seen
>= iface
->conf
->track_sta_max_num
) {
641 /* Expire oldest entry to make room for a new one */
642 sta_track_expire(iface
, 1);
645 wpa_printf(MSG_MSGDUMP
, "%s: Add STA tracking entry for "
646 MACSTR
, iface
->bss
[0]->conf
->iface
, MAC2STR(addr
));
647 dl_list_add_tail(&iface
->sta_seen
, &info
->list
);
648 iface
->num_sta_seen
++;
652 struct hostapd_data
*
653 sta_track_seen_on(struct hostapd_iface
*iface
, const u8
*addr
,
656 struct hapd_interfaces
*interfaces
= iface
->interfaces
;
659 for (i
= 0; i
< interfaces
->count
; i
++) {
660 struct hostapd_data
*hapd
= NULL
;
662 iface
= interfaces
->iface
[i
];
663 for (j
= 0; j
< iface
->num_bss
; j
++) {
664 hapd
= iface
->bss
[j
];
665 if (os_strcmp(ifname
, hapd
->conf
->iface
) == 0)
670 if (hapd
&& sta_track_get(iface
, addr
))
678 void handle_probe_req(struct hostapd_data
*hapd
,
679 const struct ieee80211_mgmt
*mgmt
, size_t len
,
683 struct ieee802_11_elems elems
;
688 enum ssid_match_result res
;
690 ie
= mgmt
->u
.probe_req
.variable
;
691 if (len
< IEEE80211_HDRLEN
+ sizeof(mgmt
->u
.probe_req
))
693 if (hapd
->iconf
->track_sta_max_num
)
694 sta_track_add(hapd
->iface
, mgmt
->sa
);
695 ie_len
= len
- (IEEE80211_HDRLEN
+ sizeof(mgmt
->u
.probe_req
));
697 for (i
= 0; hapd
->probereq_cb
&& i
< hapd
->num_probereq_cb
; i
++)
698 if (hapd
->probereq_cb
[i
].cb(hapd
->probereq_cb
[i
].ctx
,
699 mgmt
->sa
, mgmt
->da
, mgmt
->bssid
,
700 ie
, ie_len
, ssi_signal
) > 0)
703 if (!hapd
->iconf
->send_probe_response
)
706 if (ieee802_11_parse_elems(ie
, ie_len
, &elems
, 0) == ParseFailed
) {
707 wpa_printf(MSG_DEBUG
, "Could not parse ProbeReq from " MACSTR
,
712 if ((!elems
.ssid
|| !elems
.supp_rates
)) {
713 wpa_printf(MSG_DEBUG
, "STA " MACSTR
" sent probe request "
714 "without SSID or supported rates element",
720 * No need to reply if the Probe Request frame was sent on an adjacent
721 * channel. IEEE Std 802.11-2012 describes this as a requirement for an
722 * AP with dot11RadioMeasurementActivated set to true, but strictly
723 * speaking does not allow such ignoring of Probe Request frames if
724 * dot11RadioMeasurementActivated is false. Anyway, this can help reduce
725 * number of unnecessary Probe Response frames for cases where the STA
726 * is less likely to see them (Probe Request frame sent on a
727 * neighboring, but partially overlapping, channel).
729 if (elems
.ds_params
&&
730 hapd
->iface
->current_mode
&&
731 (hapd
->iface
->current_mode
->mode
== HOSTAPD_MODE_IEEE80211G
||
732 hapd
->iface
->current_mode
->mode
== HOSTAPD_MODE_IEEE80211B
) &&
733 hapd
->iconf
->channel
!= elems
.ds_params
[0]) {
734 wpa_printf(MSG_DEBUG
,
735 "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u",
736 hapd
->iconf
->channel
, elems
.ds_params
[0]);
741 if (hapd
->p2p
&& elems
.wps_ie
) {
743 wps
= ieee802_11_vendor_ie_concat(ie
, ie_len
, WPS_DEV_OUI_WFA
);
744 if (wps
&& !p2p_group_match_dev_type(hapd
->p2p_group
, wps
)) {
745 wpa_printf(MSG_MSGDUMP
, "P2P: Ignore Probe Request "
746 "due to mismatch with Requested Device "
754 if (hapd
->p2p
&& elems
.p2p
) {
756 p2p
= ieee802_11_vendor_ie_concat(ie
, ie_len
, P2P_IE_VENDOR_TYPE
);
757 if (p2p
&& !p2p_group_match_dev_id(hapd
->p2p_group
, p2p
)) {
758 wpa_printf(MSG_MSGDUMP
, "P2P: Ignore Probe Request "
759 "due to mismatch with Device ID");
765 #endif /* CONFIG_P2P */
767 if (hapd
->conf
->ignore_broadcast_ssid
&& elems
.ssid_len
== 0 &&
768 elems
.ssid_list_len
== 0) {
769 wpa_printf(MSG_MSGDUMP
, "Probe Request from " MACSTR
" for "
770 "broadcast SSID ignored", MAC2STR(mgmt
->sa
));
775 if ((hapd
->conf
->p2p
& P2P_GROUP_OWNER
) &&
776 elems
.ssid_len
== P2P_WILDCARD_SSID_LEN
&&
777 os_memcmp(elems
.ssid
, P2P_WILDCARD_SSID
,
778 P2P_WILDCARD_SSID_LEN
) == 0) {
779 /* Process P2P Wildcard SSID like Wildcard SSID */
782 #endif /* CONFIG_P2P */
784 res
= ssid_match(hapd
, elems
.ssid
, elems
.ssid_len
,
785 elems
.ssid_list
, elems
.ssid_list_len
);
786 if (res
== NO_SSID_MATCH
) {
787 if (!(mgmt
->da
[0] & 0x01)) {
788 wpa_printf(MSG_MSGDUMP
, "Probe Request from " MACSTR
789 " for foreign SSID '%s' (DA " MACSTR
")%s",
791 wpa_ssid_txt(elems
.ssid
, elems
.ssid_len
),
793 elems
.ssid_list
? " (SSID list)" : "");
798 #ifdef CONFIG_INTERWORKING
799 if (hapd
->conf
->interworking
&&
800 elems
.interworking
&& elems
.interworking_len
>= 1) {
801 u8 ant
= elems
.interworking
[0] & 0x0f;
802 if (ant
!= INTERWORKING_ANT_WILDCARD
&&
803 ant
!= hapd
->conf
->access_network_type
) {
804 wpa_printf(MSG_MSGDUMP
, "Probe Request from " MACSTR
805 " for mismatching ANT %u ignored",
806 MAC2STR(mgmt
->sa
), ant
);
811 if (hapd
->conf
->interworking
&& elems
.interworking
&&
812 (elems
.interworking_len
== 7 || elems
.interworking_len
== 9)) {
814 if (elems
.interworking_len
== 7)
815 hessid
= elems
.interworking
+ 1;
817 hessid
= elems
.interworking
+ 1 + 2;
818 if (!is_broadcast_ether_addr(hessid
) &&
819 os_memcmp(hessid
, hapd
->conf
->hessid
, ETH_ALEN
) != 0) {
820 wpa_printf(MSG_MSGDUMP
, "Probe Request from " MACSTR
821 " for mismatching HESSID " MACSTR
823 MAC2STR(mgmt
->sa
), MAC2STR(hessid
));
827 #endif /* CONFIG_INTERWORKING */
830 if ((hapd
->conf
->p2p
& P2P_GROUP_OWNER
) &&
831 supp_rates_11b_only(&elems
)) {
832 /* Indicates support for 11b rates only */
833 wpa_printf(MSG_EXCESSIVE
, "P2P: Ignore Probe Request from "
834 MACSTR
" with only 802.11b rates",
838 #endif /* CONFIG_P2P */
840 /* TODO: verify that supp_rates contains at least one matching rate
841 * with AP configuration */
843 if (hapd
->conf
->no_probe_resp_if_seen_on
&&
844 is_multicast_ether_addr(mgmt
->da
) &&
845 is_multicast_ether_addr(mgmt
->bssid
) &&
846 sta_track_seen_on(hapd
->iface
, mgmt
->sa
,
847 hapd
->conf
->no_probe_resp_if_seen_on
)) {
848 wpa_printf(MSG_MSGDUMP
, "%s: Ignore Probe Request from " MACSTR
849 " since STA has been seen on %s",
850 hapd
->conf
->iface
, MAC2STR(mgmt
->sa
),
851 hapd
->conf
->no_probe_resp_if_seen_on
);
855 #ifdef CONFIG_TESTING_OPTIONS
856 if (hapd
->iconf
->ignore_probe_probability
> 0.0 &&
857 drand48() < hapd
->iconf
->ignore_probe_probability
) {
859 "TESTING: ignoring probe request from " MACSTR
,
863 #endif /* CONFIG_TESTING_OPTIONS */
865 resp
= hostapd_gen_probe_resp(hapd
, mgmt
, elems
.p2p
!= NULL
,
871 * If this is a broadcast probe request, apply no ack policy to avoid
874 noack
= !!(res
== WILDCARD_SSID_MATCH
&&
875 is_broadcast_ether_addr(mgmt
->da
));
877 if (hostapd_drv_send_mlme(hapd
, resp
, resp_len
, noack
) < 0)
878 wpa_printf(MSG_INFO
, "handle_probe_req: send failed");
882 wpa_printf(MSG_EXCESSIVE
, "STA " MACSTR
" sent probe request for %s "
883 "SSID", MAC2STR(mgmt
->sa
),
884 elems
.ssid_len
== 0 ? "broadcast" : "our");
888 static u8
* hostapd_probe_resp_offloads(struct hostapd_data
*hapd
,
891 /* check probe response offloading caps and print warnings */
892 if (!(hapd
->iface
->drv_flags
& WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD
))
896 if (hapd
->conf
->wps_state
&& hapd
->wps_probe_resp_ie
&&
897 (!(hapd
->iface
->probe_resp_offloads
&
898 (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS
|
899 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2
))))
900 wpa_printf(MSG_WARNING
, "Device is trying to offload WPS "
901 "Probe Response while not supporting this");
902 #endif /* CONFIG_WPS */
905 if ((hapd
->conf
->p2p
& P2P_ENABLED
) && hapd
->p2p_probe_resp_ie
&&
906 !(hapd
->iface
->probe_resp_offloads
&
907 WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P
))
908 wpa_printf(MSG_WARNING
, "Device is trying to offload P2P "
909 "Probe Response while not supporting this");
910 #endif /* CONFIG_P2P */
912 if (hapd
->conf
->interworking
&&
913 !(hapd
->iface
->probe_resp_offloads
&
914 WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING
))
915 wpa_printf(MSG_WARNING
, "Device is trying to offload "
916 "Interworking Probe Response while not supporting "
919 /* Generate a Probe Response template for the non-P2P case */
920 return hostapd_gen_probe_resp(hapd
, NULL
, 0, resp_len
);
923 #endif /* NEED_AP_MLME */
926 int ieee802_11_build_ap_params(struct hostapd_data
*hapd
,
927 struct wpa_driver_ap_params
*params
)
929 struct ieee80211_mgmt
*head
= NULL
;
931 size_t head_len
= 0, tail_len
= 0;
938 #define BEACON_HEAD_BUF_SIZE 256
939 #define BEACON_TAIL_BUF_SIZE 512
940 head
= os_zalloc(BEACON_HEAD_BUF_SIZE
);
941 tail_len
= BEACON_TAIL_BUF_SIZE
;
943 if (hapd
->conf
->wps_state
&& hapd
->wps_beacon_ie
)
944 tail_len
+= wpabuf_len(hapd
->wps_beacon_ie
);
945 #endif /* CONFIG_WPS */
947 if (hapd
->p2p_beacon_ie
)
948 tail_len
+= wpabuf_len(hapd
->p2p_beacon_ie
);
949 #endif /* CONFIG_P2P */
951 if (hapd
->iface
->fst_ies
)
952 tail_len
+= wpabuf_len(hapd
->iface
->fst_ies
);
953 #endif /* CONFIG_FST */
954 if (hapd
->conf
->vendor_elements
)
955 tail_len
+= wpabuf_len(hapd
->conf
->vendor_elements
);
957 #ifdef CONFIG_IEEE80211AC
958 if (hapd
->conf
->vendor_vht
) {
959 tail_len
+= 5 + 2 + sizeof(struct ieee80211_vht_capabilities
) +
960 2 + sizeof(struct ieee80211_vht_operation
);
962 #endif /* CONFIG_IEEE80211AC */
964 tailpos
= tail
= os_malloc(tail_len
);
965 if (head
== NULL
|| tail
== NULL
) {
966 wpa_printf(MSG_ERROR
, "Failed to set beacon data");
972 head
->frame_control
= IEEE80211_FC(WLAN_FC_TYPE_MGMT
,
973 WLAN_FC_STYPE_BEACON
);
974 head
->duration
= host_to_le16(0);
975 os_memset(head
->da
, 0xff, ETH_ALEN
);
977 os_memcpy(head
->sa
, hapd
->own_addr
, ETH_ALEN
);
978 os_memcpy(head
->bssid
, hapd
->own_addr
, ETH_ALEN
);
979 head
->u
.beacon
.beacon_int
=
980 host_to_le16(hapd
->iconf
->beacon_int
);
982 /* hardware or low-level driver will setup seq_ctrl and timestamp */
983 capab_info
= hostapd_own_capab_info(hapd
);
984 head
->u
.beacon
.capab_info
= host_to_le16(capab_info
);
985 pos
= &head
->u
.beacon
.variable
[0];
988 *pos
++ = WLAN_EID_SSID
;
989 if (hapd
->conf
->ignore_broadcast_ssid
== 2) {
990 /* clear the data, but keep the correct length of the SSID */
991 *pos
++ = hapd
->conf
->ssid
.ssid_len
;
992 os_memset(pos
, 0, hapd
->conf
->ssid
.ssid_len
);
993 pos
+= hapd
->conf
->ssid
.ssid_len
;
994 } else if (hapd
->conf
->ignore_broadcast_ssid
) {
995 *pos
++ = 0; /* empty SSID */
997 *pos
++ = hapd
->conf
->ssid
.ssid_len
;
998 os_memcpy(pos
, hapd
->conf
->ssid
.ssid
,
999 hapd
->conf
->ssid
.ssid_len
);
1000 pos
+= hapd
->conf
->ssid
.ssid_len
;
1003 /* Supported rates */
1004 pos
= hostapd_eid_supp_rates(hapd
, pos
);
1007 pos
= hostapd_eid_ds_params(hapd
, pos
);
1009 head_len
= pos
- (u8
*) head
;
1011 tailpos
= hostapd_eid_country(hapd
, tailpos
,
1012 tail
+ BEACON_TAIL_BUF_SIZE
- tailpos
);
1014 /* Power Constraint element */
1015 tailpos
= hostapd_eid_pwr_constraint(hapd
, tailpos
);
1017 /* ERP Information element */
1018 tailpos
= hostapd_eid_erp_info(hapd
, tailpos
);
1020 /* Extended supported rates */
1021 tailpos
= hostapd_eid_ext_supp_rates(hapd
, tailpos
);
1023 /* RSN, MDIE, WPA */
1024 tailpos
= hostapd_eid_wpa(hapd
, tailpos
, tail
+ BEACON_TAIL_BUF_SIZE
-
1027 tailpos
= hostapd_eid_rm_enabled_capab(hapd
, tailpos
,
1028 tail
+ BEACON_TAIL_BUF_SIZE
-
1031 tailpos
= hostapd_eid_bss_load(hapd
, tailpos
,
1032 tail
+ BEACON_TAIL_BUF_SIZE
- tailpos
);
1034 #ifdef CONFIG_IEEE80211N
1035 tailpos
= hostapd_eid_ht_capabilities(hapd
, tailpos
);
1036 tailpos
= hostapd_eid_ht_operation(hapd
, tailpos
);
1037 #endif /* CONFIG_IEEE80211N */
1039 tailpos
= hostapd_eid_ext_capab(hapd
, tailpos
);
1042 * TODO: Time Advertisement element should only be included in some
1043 * DTIM Beacon frames.
1045 tailpos
= hostapd_eid_time_adv(hapd
, tailpos
);
1047 tailpos
= hostapd_eid_interworking(hapd
, tailpos
);
1048 tailpos
= hostapd_eid_adv_proto(hapd
, tailpos
);
1049 tailpos
= hostapd_eid_roaming_consortium(hapd
, tailpos
);
1050 tailpos
= hostapd_add_csa_elems(hapd
, tailpos
, tail
,
1051 &hapd
->cs_c_off_beacon
,
1052 &hapd
->cs_c_off_ecsa_beacon
);
1055 if (hapd
->iface
->fst_ies
) {
1056 os_memcpy(tailpos
, wpabuf_head(hapd
->iface
->fst_ies
),
1057 wpabuf_len(hapd
->iface
->fst_ies
));
1058 tailpos
+= wpabuf_len(hapd
->iface
->fst_ies
);
1060 #endif /* CONFIG_FST */
1062 #ifdef CONFIG_IEEE80211AC
1063 if (hapd
->iconf
->ieee80211ac
&& !hapd
->conf
->disable_11ac
) {
1064 tailpos
= hostapd_eid_vht_capabilities(hapd
, tailpos
);
1065 tailpos
= hostapd_eid_vht_operation(hapd
, tailpos
);
1067 if (hapd
->conf
->vendor_vht
)
1068 tailpos
= hostapd_eid_vendor_vht(hapd
, tailpos
);
1069 #endif /* CONFIG_IEEE80211AC */
1071 /* Wi-Fi Alliance WMM */
1072 tailpos
= hostapd_eid_wmm(hapd
, tailpos
);
1075 if (hapd
->conf
->wps_state
&& hapd
->wps_beacon_ie
) {
1076 os_memcpy(tailpos
, wpabuf_head(hapd
->wps_beacon_ie
),
1077 wpabuf_len(hapd
->wps_beacon_ie
));
1078 tailpos
+= wpabuf_len(hapd
->wps_beacon_ie
);
1080 #endif /* CONFIG_WPS */
1083 if ((hapd
->conf
->p2p
& P2P_ENABLED
) && hapd
->p2p_beacon_ie
) {
1084 os_memcpy(tailpos
, wpabuf_head(hapd
->p2p_beacon_ie
),
1085 wpabuf_len(hapd
->p2p_beacon_ie
));
1086 tailpos
+= wpabuf_len(hapd
->p2p_beacon_ie
);
1088 #endif /* CONFIG_P2P */
1089 #ifdef CONFIG_P2P_MANAGER
1090 if ((hapd
->conf
->p2p
& (P2P_MANAGE
| P2P_ENABLED
| P2P_GROUP_OWNER
)) ==
1092 tailpos
= hostapd_eid_p2p_manage(hapd
, tailpos
);
1093 #endif /* CONFIG_P2P_MANAGER */
1096 tailpos
= hostapd_eid_hs20_indication(hapd
, tailpos
);
1097 tailpos
= hostapd_eid_osen(hapd
, tailpos
);
1098 #endif /* CONFIG_HS20 */
1100 if (hapd
->conf
->vendor_elements
) {
1101 os_memcpy(tailpos
, wpabuf_head(hapd
->conf
->vendor_elements
),
1102 wpabuf_len(hapd
->conf
->vendor_elements
));
1103 tailpos
+= wpabuf_len(hapd
->conf
->vendor_elements
);
1106 tail_len
= tailpos
> tail
? tailpos
- tail
: 0;
1108 resp
= hostapd_probe_resp_offloads(hapd
, &resp_len
);
1109 #endif /* NEED_AP_MLME */
1111 os_memset(params
, 0, sizeof(*params
));
1112 params
->head
= (u8
*) head
;
1113 params
->head_len
= head_len
;
1114 params
->tail
= tail
;
1115 params
->tail_len
= tail_len
;
1116 params
->proberesp
= resp
;
1117 params
->proberesp_len
= resp_len
;
1118 params
->dtim_period
= hapd
->conf
->dtim_period
;
1119 params
->beacon_int
= hapd
->iconf
->beacon_int
;
1120 params
->basic_rates
= hapd
->iface
->basic_rates
;
1121 params
->ssid
= hapd
->conf
->ssid
.ssid
;
1122 params
->ssid_len
= hapd
->conf
->ssid
.ssid_len
;
1123 if ((hapd
->conf
->wpa
& (WPA_PROTO_WPA
| WPA_PROTO_RSN
)) ==
1124 (WPA_PROTO_WPA
| WPA_PROTO_RSN
))
1125 params
->pairwise_ciphers
= hapd
->conf
->wpa_pairwise
|
1126 hapd
->conf
->rsn_pairwise
;
1127 else if (hapd
->conf
->wpa
& WPA_PROTO_RSN
)
1128 params
->pairwise_ciphers
= hapd
->conf
->rsn_pairwise
;
1129 else if (hapd
->conf
->wpa
& WPA_PROTO_WPA
)
1130 params
->pairwise_ciphers
= hapd
->conf
->wpa_pairwise
;
1131 params
->group_cipher
= hapd
->conf
->wpa_group
;
1132 params
->key_mgmt_suites
= hapd
->conf
->wpa_key_mgmt
;
1133 params
->auth_algs
= hapd
->conf
->auth_algs
;
1134 params
->wpa_version
= hapd
->conf
->wpa
;
1135 params
->privacy
= hapd
->conf
->ssid
.wep
.keys_set
|| hapd
->conf
->wpa
||
1136 (hapd
->conf
->ieee802_1x
&&
1137 (hapd
->conf
->default_wep_key_len
||
1138 hapd
->conf
->individual_wep_key_len
));
1139 switch (hapd
->conf
->ignore_broadcast_ssid
) {
1141 params
->hide_ssid
= NO_SSID_HIDING
;
1144 params
->hide_ssid
= HIDDEN_SSID_ZERO_LEN
;
1147 params
->hide_ssid
= HIDDEN_SSID_ZERO_CONTENTS
;
1150 params
->isolate
= hapd
->conf
->isolate
;
1151 params
->smps_mode
= hapd
->iconf
->ht_capab
& HT_CAP_INFO_SMPS_MASK
;
1153 params
->cts_protect
= !!(ieee802_11_erp_info(hapd
) &
1154 ERP_INFO_USE_PROTECTION
);
1155 params
->preamble
= hapd
->iface
->num_sta_no_short_preamble
== 0 &&
1156 hapd
->iconf
->preamble
== SHORT_PREAMBLE
;
1157 if (hapd
->iface
->current_mode
&&
1158 hapd
->iface
->current_mode
->mode
== HOSTAPD_MODE_IEEE80211G
)
1159 params
->short_slot_time
=
1160 hapd
->iface
->num_sta_no_short_slot_time
> 0 ? 0 : 1;
1162 params
->short_slot_time
= -1;
1163 if (!hapd
->iconf
->ieee80211n
|| hapd
->conf
->disable_11n
)
1164 params
->ht_opmode
= -1;
1166 params
->ht_opmode
= hapd
->iface
->ht_op_mode
;
1167 #endif /* NEED_AP_MLME */
1168 params
->interworking
= hapd
->conf
->interworking
;
1169 if (hapd
->conf
->interworking
&&
1170 !is_zero_ether_addr(hapd
->conf
->hessid
))
1171 params
->hessid
= hapd
->conf
->hessid
;
1172 params
->access_network_type
= hapd
->conf
->access_network_type
;
1173 params
->ap_max_inactivity
= hapd
->conf
->ap_max_inactivity
;
1175 params
->p2p_go_ctwindow
= hapd
->iconf
->p2p_go_ctwindow
;
1176 #endif /* CONFIG_P2P */
1178 params
->disable_dgaf
= hapd
->conf
->disable_dgaf
;
1179 if (hapd
->conf
->osen
) {
1180 params
->privacy
= 1;
1183 #endif /* CONFIG_HS20 */
1188 void ieee802_11_free_ap_params(struct wpa_driver_ap_params
*params
)
1190 os_free(params
->tail
);
1191 params
->tail
= NULL
;
1192 os_free(params
->head
);
1193 params
->head
= NULL
;
1194 os_free(params
->proberesp
);
1195 params
->proberesp
= NULL
;
1199 int ieee802_11_set_beacon(struct hostapd_data
*hapd
)
1201 struct wpa_driver_ap_params params
;
1202 struct hostapd_freq_params freq
;
1203 struct hostapd_iface
*iface
= hapd
->iface
;
1204 struct hostapd_config
*iconf
= iface
->conf
;
1205 struct wpabuf
*beacon
, *proberesp
, *assocresp
;
1208 if (hapd
->csa_in_progress
) {
1209 wpa_printf(MSG_ERROR
, "Cannot set beacons during CSA period");
1213 hapd
->beacon_set_done
= 1;
1215 if (ieee802_11_build_ap_params(hapd
, ¶ms
) < 0)
1218 if (hostapd_build_ap_extra_ies(hapd
, &beacon
, &proberesp
, &assocresp
) <
1222 params
.beacon_ies
= beacon
;
1223 params
.proberesp_ies
= proberesp
;
1224 params
.assocresp_ies
= assocresp
;
1225 params
.reenable
= hapd
->reenable_beacon
;
1226 hapd
->reenable_beacon
= 0;
1228 if (iface
->current_mode
&&
1229 hostapd_set_freq_params(&freq
, iconf
->hw_mode
, iface
->freq
,
1230 iconf
->channel
, iconf
->ieee80211n
,
1232 iconf
->secondary_channel
,
1233 iconf
->vht_oper_chwidth
,
1234 iconf
->vht_oper_centr_freq_seg0_idx
,
1235 iconf
->vht_oper_centr_freq_seg1_idx
,
1236 iface
->current_mode
->vht_capab
) == 0)
1237 params
.freq
= &freq
;
1239 res
= hostapd_drv_set_ap(hapd
, ¶ms
);
1240 hostapd_free_ap_extra_ies(hapd
, beacon
, proberesp
, assocresp
);
1242 wpa_printf(MSG_ERROR
, "Failed to set beacon parameters");
1246 ieee802_11_free_ap_params(¶ms
);
1251 int ieee802_11_set_beacons(struct hostapd_iface
*iface
)
1256 for (i
= 0; i
< iface
->num_bss
; i
++) {
1257 if (iface
->bss
[i
]->started
&&
1258 ieee802_11_set_beacon(iface
->bss
[i
]) < 0)
1266 /* only update beacons if started */
1267 int ieee802_11_update_beacons(struct hostapd_iface
*iface
)
1272 for (i
= 0; i
< iface
->num_bss
; i
++) {
1273 if (iface
->bss
[i
]->beacon_set_done
&& iface
->bss
[i
]->started
&&
1274 ieee802_11_set_beacon(iface
->bss
[i
]) < 0)
1281 #endif /* CONFIG_NATIVE_WINDOWS */