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mbssid: Set extended capabilities

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Set extended capabilities as described in IEEE Std 802.11ax-2021,
9.4.2.26. Reset the capability bits to 0 explicitly if MBSSID and/or EMA
is not enabled because otherwise some client devices fail to associate.

Bit 80 (complete list of non-tx profiles) is set for all Probe Response
frames, but for Beacon frames it is set only if EMA is disabled or if
EMA profile periodicity is 1.

Signed-off-by: Aloka Dixit <quic_alokad@quicinc.com>
Co-developed-by: John Crispin <john@phrozen.org>
Signed-off-by: John Crispin <john@phrozen.org>
This commit is contained in:
Aloka Dixit 2022-11-30 19:18:39 -08:00 committed by Jouni Malinen
parent a004bf2cd0
commit fc2e4bac5a
5 changed files with 40 additions and 15 deletions
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2
src/ap/ap_drv_ops.c
View file

@ -92,7 +92,7 @@ int hostapd_build_ap_extra_ies(struct hostapd_data *hapd,
goto fail;
pos = buf;
pos = hostapd_eid_ext_capab(hapd, pos);
pos = hostapd_eid_ext_capab(hapd, pos, false);
if (add_buf_data(&assocresp, buf, pos - buf) < 0)
goto fail;
pos = hostapd_eid_interworking(hapd, pos);

20
src/ap/beacon.c
View file

@ -644,7 +644,9 @@ static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
pos = hostapd_eid_ht_capabilities(hapd, pos);
pos = hostapd_eid_ht_operation(hapd, pos);
pos = hostapd_eid_ext_capab(hapd, pos);
/* Probe Response frames always include all non-TX profiles */
pos = hostapd_eid_ext_capab(hapd, pos,
hapd->iconf->mbssid >= MBSSID_ENABLED);
pos = hostapd_eid_time_adv(hapd, pos);
pos = hostapd_eid_time_zone(hapd, pos);
@ -1576,6 +1578,7 @@ int ieee802_11_build_ap_params(struct hostapd_data *hapd,
#ifdef NEED_AP_MLME
u16 capab_info;
u8 *pos, *tailpos, *tailend, *csa_pos;
bool complete = false;
#endif /* NEED_AP_MLME */
os_memset(params, 0, sizeof(*params));
@ -1718,15 +1721,20 @@ int ieee802_11_build_ap_params(struct hostapd_data *hapd,
tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
tailpos = hostapd_eid_ht_operation(hapd, tailpos);
tailpos = hostapd_eid_ext_capab(hapd, tailpos);
if (hapd->iconf->mbssid && hapd->iconf->num_bss > 1 &&
ieee802_11_build_ap_params_mbssid(hapd, params)) {
if (hapd->iconf->mbssid && hapd->iconf->num_bss > 1) {
if (ieee802_11_build_ap_params_mbssid(hapd, params)) {
os_free(head);
os_free(tail);
wpa_printf(MSG_ERROR, "MBSSID: Failed to set beacon data");
wpa_printf(MSG_ERROR,
"MBSSID: Failed to set beacon data");
return -1;
}
complete = hapd->iconf->mbssid == MBSSID_ENABLED ||
(hapd->iconf->mbssid == ENHANCED_MBSSID_ENABLED &&
params->mbssid_elem_count == 1);
}
tailpos = hostapd_eid_ext_capab(hapd, tailpos, complete);
/*
* TODO: Time Advertisement element should only be included in some

2
src/ap/ieee802_11.c
View file

@ -4350,7 +4350,7 @@ static u16 send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta,
}
#endif /* CONFIG_IEEE80211AX */
p = hostapd_eid_ext_capab(hapd, p);
p = hostapd_eid_ext_capab(hapd, p, false);
p = hostapd_eid_bss_max_idle_period(hapd, p);
if (sta && sta->qos_map_enabled)
p = hostapd_eid_qos_map_set(hapd, p);

3
src/ap/ieee802_11.h
View file

@ -45,7 +45,8 @@ static inline int ieee802_11_get_mib_sta(struct hostapd_data *hapd,
#endif /* NEED_AP_MLME */
u16 hostapd_own_capab_info(struct hostapd_data *hapd);
void ap_ht2040_timeout(void *eloop_data, void *user_data);
u8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid);
u8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid,
bool mbssid_complete);
u8 * hostapd_eid_qos_map_set(struct hostapd_data *hapd, u8 *eid);
u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid);
u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid);

22
src/ap/ieee802_11_shared.c
View file

@ -340,7 +340,8 @@ void ieee802_11_sa_query_action(struct hostapd_data *hapd,
}
static void hostapd_ext_capab_byte(struct hostapd_data *hapd, u8 *pos, int idx)
static void hostapd_ext_capab_byte(struct hostapd_data *hapd, u8 *pos, int idx,
bool mbssid_complete)
{
*pos = 0x00;
@ -364,6 +365,8 @@ static void hostapd_ext_capab_byte(struct hostapd_data *hapd, u8 *pos, int idx)
*pos |= 0x02; /* Bit 17 - WNM-Sleep Mode */
if (hapd->conf->bss_transition)
*pos |= 0x08; /* Bit 19 - BSS Transition */
if (hapd->iconf->mbssid)
*pos |= 0x40; /* Bit 22 - Multiple BSSID */
break;
case 3: /* Bits 24-31 */
#ifdef CONFIG_WNM_AP
@ -435,6 +438,11 @@ static void hostapd_ext_capab_byte(struct hostapd_data *hapd, u8 *pos, int idx)
(hapd->iface->drv_flags &
WPA_DRIVER_FLAGS_BEACON_PROTECTION))
*pos |= 0x10; /* Bit 84 - Beacon Protection Enabled */
if (hapd->iconf->mbssid == ENHANCED_MBSSID_ENABLED)
*pos |= 0x08; /* Bit 83 - Enhanced multiple BSSID */
if (mbssid_complete)
*pos |= 0x01; /* Bit 80 - Complete List of NonTxBSSID
* Profiles */
break;
case 11: /* Bits 88-95 */
#ifdef CONFIG_SAE_PK
@ -448,7 +456,8 @@ static void hostapd_ext_capab_byte(struct hostapd_data *hapd, u8 *pos, int idx)
}
u8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid)
u8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid,
bool mbssid_complete)
{
u8 *pos = eid;
u8 len = EXT_CAPA_MAX_LEN, i;
@ -459,7 +468,7 @@ u8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid)
*pos++ = WLAN_EID_EXT_CAPAB;
*pos++ = len;
for (i = 0; i < len; i++, pos++) {
hostapd_ext_capab_byte(hapd, pos, i);
hostapd_ext_capab_byte(hapd, pos, i, mbssid_complete);
if (i < hapd->iface->extended_capa_len) {
*pos &= ~hapd->iface->extended_capa_mask[i];
@ -470,6 +479,13 @@ u8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid)
*pos &= ~hapd->conf->ext_capa_mask[i];
*pos |= hapd->conf->ext_capa[i];
}
/* Clear bits 83 and 22 if EMA and MBSSID are not enabled
* otherwise association fails with some clients */
if (i == 10 && hapd->iconf->mbssid < ENHANCED_MBSSID_ENABLED)
*pos &= ~0x08;
if (i == 2 && !hapd->iconf->mbssid)
*pos &= ~0x40;
}
while (len > 0 && eid[1 + len] == 0) {