Allow HE MCS rate selection for Beacon frames

Allow HE MCS rate to be used for beacon transmission when the driver
advertises the support. The rate is specified with a new beacon_rate
option "he:<HE MCS>" in hostapd configuration.

Signed-off-by: Rajkumar Manoharan <rmanohar@codeaurora.org>

hostapd/config_file.c

@@ -3263,6 +3263,16 @@ static int hostapd_config_fill(struct hostapd_config *conf,
 			}
 			conf->rate_type = BEACON_RATE_VHT;
 			conf->beacon_rate = val;
+		} else if (os_strncmp(pos, "he:", 3) == 0) {
+			val = atoi(pos + 3);
+			if (val < 0 || val > 11) {
+				wpa_printf(MSG_ERROR,
+					   "Line %d: invalid beacon_rate HE-MCS %d",
+					   line, val);
+				return 1;
+			}
+			conf->rate_type = BEACON_RATE_HE;
+			conf->beacon_rate = val;
 		} else {
 			val = atoi(pos);
 			if (val < 10 || val > 10000) {

hostapd/hostapd.conf

@@ -279,6 +279,8 @@ fragm_threshold=-1
 #    beacon_rate=ht:<HT MCS>
 # VHT:
 #    beacon_rate=vht:<VHT MCS>
+# HE:
+#    beacon_rate=he:<HE MCS>
 #
 # For example, beacon_rate=10 for 1 Mbps or beacon_rate=60 for 6 Mbps (OFDM).
 #beacon_rate=10

src/common/defs.h

@@ -405,7 +405,8 @@ enum wpa_radio_work_band {
 enum beacon_rate_type {
 	BEACON_RATE_LEGACY,
 	BEACON_RATE_HT,
-	BEACON_RATE_VHT
+	BEACON_RATE_VHT,
+	BEACON_RATE_HE
 };
 
 enum eap_proxy_sim_state {

src/drivers/driver.h

@@ -1264,14 +1264,14 @@ struct wpa_driver_ap_params {
 	 *
 	 * This parameter can be used to set a specific Beacon frame data rate
 	 * for the BSS. The interpretation of this value depends on the
-	 * rate_type (legacy: in 100 kbps units, HT: HT-MCS, VHT: VHT-MCS). If
+	 * rate_type (legacy: in 100 kbps units, HT: HT-MCS, VHT: VHT-MCS,
-	 * beacon_rate == 0 and rate_type == 0 (BEACON_RATE_LEGACY), the default
+	 * HE: HE-MCS). If beacon_rate == 0 and rate_type == 0
-	 * Beacon frame data rate is used.
+	 * (BEACON_RATE_LEGACY), the default Beacon frame data rate is used.
 	 */
 	unsigned int beacon_rate;
 
 	/**
-	 * beacon_rate_type: Beacon data rate type (legacy/HT/VHT)
+	 * beacon_rate_type: Beacon data rate type (legacy/HT/VHT/HE)
 	 */
 	enum beacon_rate_type rate_type;
 
@@ -1959,6 +1959,8 @@ struct wpa_driver_capa {
  * frames
  */
 #define WPA_DRIVER_FLAGS2_PROT_RANGE_NEG	0x0000000000000010ULL
+/** Driver supports Beacon frame TX rate configuration (HE rates) */
+#define WPA_DRIVER_FLAGS2_BEACON_RATE_HE	0x0000000000000020ULL
 	u64 flags2;
 
 #define FULL_AP_CLIENT_STATE_SUPP(drv_flags) \

src/drivers/driver_nl80211.c

@@ -4198,11 +4198,12 @@ static int nl80211_set_mesh_config(void *priv,
 #endif /* CONFIG_MESH */
 
 
-static int nl80211_put_beacon_rate(struct nl_msg *msg, const u64 flags,
+static int nl80211_put_beacon_rate(struct nl_msg *msg, u64 flags, u64 flags2,
 				   struct wpa_driver_ap_params *params)
 {
 	struct nlattr *bands, *band;
 	struct nl80211_txrate_vht vht_rate;
+	struct nl80211_txrate_he he_rate;
 
 	if (!params->freq ||
 	    (params->beacon_rate == 0 &&
@@ -4235,6 +4236,7 @@ static int nl80211_put_beacon_rate(struct nl_msg *msg, const u64 flags,
 		return -1;
 
 	os_memset(&vht_rate, 0, sizeof(vht_rate));
+	os_memset(&he_rate, 0, sizeof(he_rate));
 
 	switch (params->rate_type) {
 	case BEACON_RATE_LEGACY:
@@ -4287,6 +4289,22 @@ static int nl80211_put_beacon_rate(struct nl_msg *msg, const u64 flags,
 		wpa_printf(MSG_DEBUG, " * beacon_rate = VHT-MCS %u",
 			   params->beacon_rate);
 		break;
+	case BEACON_RATE_HE:
+		if (!(flags2 & WPA_DRIVER_FLAGS2_BEACON_RATE_HE)) {
+			wpa_printf(MSG_INFO,
+				   "nl80211: Driver does not support setting Beacon frame rate (HE)");
+			return -1;
+		}
+		he_rate.mcs[0] = BIT(params->beacon_rate);
+		if (nla_put(msg, NL80211_TXRATE_LEGACY, 0, NULL) ||
+		    nla_put(msg, NL80211_TXRATE_HT, 0, NULL) ||
+		    nla_put(msg, NL80211_TXRATE_VHT, sizeof(vht_rate),
+			    &vht_rate) ||
+		    nla_put(msg, NL80211_TXRATE_HE, sizeof(he_rate), &he_rate))
+			return -1;
+		wpa_printf(MSG_DEBUG, " * beacon_rate = HE-MCS %u",
+			   params->beacon_rate);
+		break;
 	}
 
 	nla_nest_end(msg, band);
@@ -4409,7 +4427,8 @@ static int wpa_driver_nl80211_set_ap(void *priv,
 	    nla_put(msg, NL80211_ATTR_BEACON_TAIL, params->tail_len,
 		    params->tail) ||
 	    nl80211_put_beacon_int(msg, params->beacon_int) ||
-	    nl80211_put_beacon_rate(msg, drv->capa.flags, params) ||
+	    nl80211_put_beacon_rate(msg, drv->capa.flags, drv->capa.flags2,
+				    params) ||
 	    nl80211_put_dtim_period(msg, params->dtim_period) ||
 	    nla_put(msg, NL80211_ATTR_SSID, params->ssid_len, params->ssid))
 		goto fail;

src/drivers/driver_nl80211_capa.c

@@ -558,6 +558,10 @@ static void wiphy_info_ext_feature_flags(struct wiphy_info_data *info,
 			      NL80211_EXT_FEATURE_BEACON_RATE_VHT))
 		capa->flags |= WPA_DRIVER_FLAGS_BEACON_RATE_VHT;
 
+	if (ext_feature_isset(ext_features, len,
+			      NL80211_EXT_FEATURE_BEACON_RATE_HE))
+		capa->flags2 |= WPA_DRIVER_FLAGS2_BEACON_RATE_HE;
+
 	if (ext_feature_isset(ext_features, len,
 			      NL80211_EXT_FEATURE_SET_SCAN_DWELL))
 		capa->rrm_flags |= WPA_DRIVER_FLAGS_SUPPORT_SET_SCAN_DWELL;