Set extended capabilities as described in IEEE Std 802.11ax-2021,
section 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
responses, but for beacons it is set only if EMA is disabled or
if EMA profile periodicity is 1.
Signed-off-by: Aloka Dixit <quic_alokad@xxxxxxxxxxx>
Co-developed-by: John Crispin <john@xxxxxxxxxxx>
Signed-off-by: John Crispin <john@xxxxxxxxxxx>
---
src/ap/beacon.c | 30 +++++++++++++++++++++---------
src/ap/ieee802_11_shared.c | 11 +++++++++++
2 files changed, 32 insertions(+), 9 deletions(-)
diff --git a/src/ap/beacon.c b/src/ap/beacon.c
index a297fad961c0..68b6b28588ce 100644
--- a/src/ap/beacon.c
+++ b/src/ap/beacon.c
@@ -517,7 +517,7 @@ static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
bool bcast_probe_resp)
{
struct ieee80211_mgmt *resp;
- u8 *pos, *epos, *csa_pos;
+ u8 *pos, *epos, *csa_pos, *ext_cap_pos;
size_t buflen;
hapd = hostapd_mbssid_get_tx_bss(hapd);
@@ -642,7 +642,12 @@ static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
pos = hostapd_eid_ht_operation(hapd, pos);
pos = hostapd_eid_mbssid(hapd, pos, epos, WLAN_FC_STYPE_PROBE_RESP, 0,
NULL);
+
+ ext_cap_pos = pos;
pos = hostapd_eid_ext_capab(hapd, pos);
+ if (hapd->iconf->mbssid >= MBSSID_ENABLED)
+ ext_cap_pos[12] |= 0x01; /* Probe responses always include all
+ * non-tx profiles */
pos = hostapd_eid_time_adv(hapd, pos);
pos = hostapd_eid_time_zone(hapd, pos);
@@ -1572,7 +1577,7 @@ int ieee802_11_build_ap_params(struct hostapd_data *hapd,
size_t resp_len = 0;
#ifdef NEED_AP_MLME
u16 capab_info;
- u8 *pos, *tailpos, *tailend, *csa_pos;
+ u8 *pos, *tailpos, *tailend, *csa_pos, *ext_cap_pos;
#endif /* NEED_AP_MLME */
os_memset(params, 0, sizeof(*params));
@@ -1714,16 +1719,23 @@ int ieee802_11_build_ap_params(struct hostapd_data *hapd,
tailpos = hostapd_eid_supported_op_classes(hapd, tailpos);
tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
tailpos = hostapd_eid_ht_operation(hapd, tailpos);
+ ext_cap_pos = 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)) {
- os_free(head);
- os_free(tail);
- wpa_printf(MSG_ERROR, "Failed to set beacon data");
- return -1;
+ 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, "Failed to set beacon data");
+ return -1;
+ } else if (hapd->iconf->mbssid == MBSSID_ENABLED ||
+ (hapd->iconf->mbssid == ENHANCED_MBSSID_ENABLED &&
+ params->mbssid_elem_count == 1)) {
+ /* Set the extended capability bit for "complete list
+ * of non-tx profiles" */
+ ext_cap_pos[12] |= 0x01;
+ }
}
-
/*
* TODO: Time Advertisement element should only be included in some
* DTIM Beacon frames.
diff --git a/src/ap/ieee802_11_shared.c b/src/ap/ieee802_11_shared.c
index eaeaec5d73dc..8eb2c21d23af 100644
--- a/src/ap/ieee802_11_shared.c
+++ b/src/ap/ieee802_11_shared.c
@@ -364,6 +364,8 @@ 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 +437,8 @@ 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 */
break;
case 11: /* Bits 88-95 */
#ifdef CONFIG_SAE_PK
@@ -470,6 +474,13 @@ 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) {
--
2.25.1
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