Add TWT responder support for AP in HT and VHT modes

Add support for TWT responder for AP operating in HT and VHT modes by
introducing a new configuration parameter ht_vht_twt_responder. When
this is enabled, TWT responder mode support in HT and VHT modes is
enabled if the driver supports this and is disabled otherwise.

Signed-off-by: Manaswini Paluri<quic_mpaluri@quicinc.com>

hostapd/config_file.c

@@ -3664,6 +3664,8 @@ static int hostapd_config_fill(struct hostapd_config *conf,
 		}
 	} else if (os_strcmp(buf, "require_ht") == 0) {
 		conf->require_ht = atoi(pos);
+	} else if (os_strcmp(buf, "ht_vht_twt_responder") == 0) {
+		conf->ht_vht_twt_responder = atoi(pos);
 	} else if (os_strcmp(buf, "obss_interval") == 0) {
 		conf->obss_interval = atoi(pos);
 #ifdef CONFIG_IEEE80211AC

hostapd/hostapd.conf

@@ -646,6 +646,12 @@ wmm_ac_vo_acm=0
 # no co-existence issues with neighboring devices are found.
 #obss_interval=0
 
+# ht_vht_twt_responder: Whether TWT responder is enabled in HT and VHT modes
+# 0 = disable; Disable TWT responder support in  HT and VHT modes (default).
+# 1 = enable; Enable TWT responder support in HT and VHT modes if supported by
+# the driver.
+#ht_vht_twt_responder=0
+
 ##### IEEE 802.11ac related configuration #####################################
 
 # ieee80211ac: Whether IEEE 802.11ac (VHT) is enabled

src/ap/ap_config.h

@@ -1226,6 +1226,9 @@ struct hostapd_config {
 		MBSSID_ENABLED = 1,
 		ENHANCED_MBSSID_ENABLED = 2,
 	} mbssid;
+
+	/* Whether to enable TWT responder in HT and VHT modes */
+	bool ht_vht_twt_responder;
 };
 
 

src/ap/beacon.c

@@ -2547,6 +2547,7 @@ static int __ieee802_11_set_beacon(struct hostapd_data *hapd)
 	struct hostapd_config *iconf = iface->conf;
 	struct hostapd_hw_modes *cmode = iface->current_mode;
 	struct wpabuf *beacon, *proberesp, *assocresp;
+	bool twt_he_responder = false;
 	int res, ret = -1, i;
 	struct hostapd_hw_modes *mode;
 
@@ -2590,11 +2591,13 @@ static int __ieee802_11_set_beacon(struct hostapd_data *hapd)
 	params.he_bss_color_partial =
 		hapd->iface->conf->he_op.he_bss_color_partial;
 	params.he_bss_color = hapd->iface->conf->he_op.he_bss_color;
-	params.twt_responder = hostapd_get_he_twt_responder(hapd,
-							    IEEE80211_MODE_AP);
+	twt_he_responder = hostapd_get_he_twt_responder(hapd,
+							IEEE80211_MODE_AP);
 	params.unsol_bcast_probe_resp_tmpl =
 		hostapd_unsol_bcast_probe_resp(hapd, &params);
 #endif /* CONFIG_IEEE80211AX */
+	params.twt_responder =
+		twt_he_responder || hostapd_get_ht_vht_twt_responder(hapd);
 	hapd->reenable_beacon = 0;
 #ifdef CONFIG_SAE
 	params.sae_pwe = hapd->conf->sae_pwe;

src/ap/ieee802_11.h

@@ -129,6 +129,7 @@ u16 copy_sta_he_6ghz_capab(struct hostapd_data *hapd, struct sta_info *sta,
 			   const u8 *he_6ghz_capab);
 int hostapd_get_he_twt_responder(struct hostapd_data *hapd,
 				 enum ieee80211_op_mode mode);
+bool hostapd_get_ht_vht_twt_responder(struct hostapd_data *hapd);
 u8 * hostapd_eid_cca(struct hostapd_data *hapd, u8 *eid);
 void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr,
 		       const u8 *buf, size_t len, int ack);

src/ap/ieee802_11_shared.c

@@ -441,6 +441,8 @@ static void hostapd_ext_capab_byte(struct hostapd_data *hapd, u8 *pos, int idx,
 		if (hostapd_get_he_twt_responder(hapd, IEEE80211_MODE_AP))
 			*pos |= 0x40; /* Bit 78 - TWT responder */
 #endif /* CONFIG_IEEE80211AX */
+		if (hostapd_get_ht_vht_twt_responder(hapd))
+			*pos |= 0x40; /* Bit 78 - TWT responder */
 		break;
 	case 10: /* Bits 80-87 */
 #ifdef CONFIG_SAE
@@ -1198,3 +1200,13 @@ struct sta_info * hostapd_ml_get_assoc_sta(struct hostapd_data *hapd,
 
 	return sta;
 }
+
+
+bool hostapd_get_ht_vht_twt_responder(struct hostapd_data *hapd)
+{
+	return hapd->iconf->ht_vht_twt_responder &&
+		((hapd->iconf->ieee80211n && !hapd->conf->disable_11n) ||
+		 (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac)) &&
+		(hapd->iface->drv_flags2 &
+		 WPA_DRIVER_FLAGS2_HT_VHT_TWT_RESPONDER);
+}

src/drivers/driver.h

@@ -2323,6 +2323,8 @@ struct wpa_driver_capa {
 #define WPA_DRIVER_FLAGS2_OWE_OFFLOAD_AP	0x0000000000080000ULL
 /** Driver support AP SAE authentication offload */
 #define WPA_DRIVER_FLAGS2_SAE_OFFLOAD_AP	0x0000000000100000ULL
+/** Driver supports TWT responder in HT and VHT modes */
+#define WPA_DRIVER_FLAGS2_HT_VHT_TWT_RESPONDER	0x0000000000200000ULL
 	u64 flags2;
 
 #define FULL_AP_CLIENT_STATE_SUPP(drv_flags) \

src/drivers/driver_nl80211_capa.c

@@ -1441,6 +1441,8 @@ static void qca_nl80211_get_features(struct wpa_driver_nl80211_data *drv)
 	if (check_feature(QCA_WLAN_VENDOR_FEATURE_AP_ALLOWED_FREQ_LIST,
 			  &info))
 		drv->qca_ap_allowed_freqs = 1;
+	if (check_feature(QCA_WLAN_VENDOR_FEATURE_HT_VHT_TWT_RESPONDER, &info))
+		drv->capa.flags2 |= WPA_DRIVER_FLAGS2_HT_VHT_TWT_RESPONDER;
 	os_free(info.flags);
 }