HS 2.0: Add advertisement of WAN Metrics

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>

hostapd/config_file.c

@@ -1441,6 +1441,71 @@ static int hs20_parse_conn_capab(struct hostapd_bss_config *bss, char *buf,
 
 	return 0;
 }
+
+
+static int hs20_parse_wan_metrics(struct hostapd_bss_config *bss, char *buf,
+				  int line)
+{
+	u8 *wan_metrics;
+	char *pos;
+
+	/* <WAN Info>:<DL Speed>:<UL Speed>:<DL Load>:<UL Load>:<LMD> */
+
+	wan_metrics = os_zalloc(13);
+	if (wan_metrics == NULL)
+		return -1;
+
+	pos = buf;
+	/* WAN Info */
+	if (hexstr2bin(pos, wan_metrics, 1) < 0)
+		goto fail;
+	pos += 2;
+	if (*pos != ':')
+		goto fail;
+	pos++;
+
+	/* Downlink Speed */
+	WPA_PUT_LE32(wan_metrics + 1, atoi(pos));
+	pos = os_strchr(pos, ':');
+	if (pos == NULL)
+		goto fail;
+	pos++;
+
+	/* Uplink Speed */
+	WPA_PUT_LE32(wan_metrics + 5, atoi(pos));
+	pos = os_strchr(pos, ':');
+	if (pos == NULL)
+		goto fail;
+	pos++;
+
+	/* Downlink Load */
+	wan_metrics[9] = atoi(pos);
+	pos = os_strchr(pos, ':');
+	if (pos == NULL)
+		goto fail;
+	pos++;
+
+	/* Uplink Load */
+	wan_metrics[10] = atoi(pos);
+	pos = os_strchr(pos, ':');
+	if (pos == NULL)
+		goto fail;
+	pos++;
+
+	/* LMD */
+	WPA_PUT_LE16(wan_metrics + 11, atoi(pos));
+
+	os_free(bss->hs20_wan_metrics);
+	bss->hs20_wan_metrics = wan_metrics;
+
+	return 0;
+
+fail:
+	wpa_printf(MSG_ERROR, "Line %d: Invalid hs20_wan_metrics '%s'",
+		   line, pos);
+	os_free(wan_metrics);
+	return -1;
+}
 #endif /* CONFIG_HS20 */
 
 
@@ -2609,6 +2674,11 @@ static int hostapd_config_fill(struct hostapd_config *conf,
 			bss->hs20 = atoi(pos);
 		} else if (os_strcmp(buf, "disable_dgaf") == 0) {
 			bss->disable_dgaf = atoi(pos);
+		} else if (os_strcmp(buf, "hs20_wan_metrics") == 0) {
+			if (hs20_parse_wan_metrics(bss, pos, line) < 0) {
+				errors++;
+				return errors;
+			}
 		} else if (os_strcmp(buf, "hs20_conn_capab") == 0) {
 			if (hs20_parse_conn_capab(bss, pos, line) < 0) {
 				errors++;

hostapd/hostapd.conf

@@ -1412,6 +1412,20 @@ own_ip_addr=127.0.0.1
 #hs20_conn_capab=6:22:1
 #hs20_conn_capab=17:5060:0
 
+# WAN Metrics
+# format: <WAN Info>:<DL Speed>:<UL Speed>:<DL Load>:<UL Load>:<LMD>
+# WAN Info: B0-B1: Link Status, B2: Symmetric Link, B3: At Capabity
+#    (encoded as two hex digits)
+#    Link Status: 1 = Link up, 2 = Link down, 3 = Link in test state
+# Downlink Speed: Estimate of WAN backhaul link current downlink speed in kbps;
+#	1..4294967295; 0 = unknown
+# Uplink Speed: Estimate of WAN backhaul link current uplink speed in kbps
+#	1..4294967295; 0 = unknown
+# Downlink Load: Current load of downlink WAN connection (scaled to 255 = 100%)
+# Uplink Load: Current load of uplink WAN connection (scaled to 255 = 100%)
+# Load Measurement Duration: Duration for measuring downlink/uplink load in
+# tenths of a second (1..65535); 0 if load cannot be determined
+#hs20_wan_metrics=01:8000:1000:80:240:3000
 
 # Operating Class Indication
 # List of operating classes the BSSes in this ESS use. The Global operating

src/ap/ap_config.c

@@ -507,6 +507,7 @@ static void hostapd_config_free_bss(struct hostapd_bss_config *conf)
 #endif /* CONFIG_RADIUS_TEST */
 
 #ifdef CONFIG_HS20
+	os_free(conf->hs20_wan_metrics);
 	os_free(conf->hs20_connection_capability);
 	os_free(conf->hs20_operating_class);
 #endif /* CONFIG_HS20 */

src/ap/ap_config.h

@@ -410,6 +410,7 @@ struct hostapd_bss_config {
 #ifdef CONFIG_HS20
 	int hs20;
 	int disable_dgaf;
+	u8 *hs20_wan_metrics;
 	u8 *hs20_connection_capability;
 	size_t hs20_connection_capability_len;
 	u8 *hs20_operating_class;

src/ap/gas_serv.c

@@ -139,6 +139,8 @@ static void anqp_add_hs_capab_list(struct hostapd_data *hapd,
 	wpabuf_put_u8(buf, HS20_STYPE_CAPABILITY_LIST);
 	wpabuf_put_u8(buf, 0); /* Reserved */
 	wpabuf_put_u8(buf, HS20_STYPE_CAPABILITY_LIST);
+	if (hapd->conf->hs20_wan_metrics)
+		wpabuf_put_u8(buf, HS20_STYPE_WAN_METRICS);
 	if (hapd->conf->hs20_connection_capability)
 		wpabuf_put_u8(buf, HS20_STYPE_CONNECTION_CAPABILITY);
 	if (hapd->conf->hs20_operating_class)
@@ -255,6 +257,21 @@ static void anqp_add_domain_name(struct hostapd_data *hapd, struct wpabuf *buf)
 }
 
 
+static void anqp_add_wan_metrics(struct hostapd_data *hapd,
+				 struct wpabuf *buf)
+{
+	if (hapd->conf->hs20_wan_metrics) {
+		u8 *len = gas_anqp_add_element(buf, ANQP_VENDOR_SPECIFIC);
+		wpabuf_put_be24(buf, OUI_WFA);
+		wpabuf_put_u8(buf, HS20_ANQP_OUI_TYPE);
+		wpabuf_put_u8(buf, HS20_STYPE_WAN_METRICS);
+		wpabuf_put_u8(buf, 0); /* Reserved */
+		wpabuf_put_data(buf, hapd->conf->hs20_wan_metrics, 13);
+		gas_anqp_set_element_len(buf, len);
+	}
+}
+
+
 static void anqp_add_connection_capability(struct hostapd_data *hapd,
 					   struct wpabuf *buf)
 {
@@ -315,6 +332,8 @@ gas_serv_build_gas_resp_payload(struct hostapd_data *hapd,
 
 	if (request & ANQP_REQ_HS_CAPABILITY_LIST)
 		anqp_add_hs_capab_list(hapd, buf);
+	if (request & ANQP_REQ_WAN_METRICS)
+		anqp_add_wan_metrics(hapd, buf);
 	if (request & ANQP_REQ_CONNECTION_CAPABILITY)
 		anqp_add_connection_capability(hapd, buf);
 	if (request & ANQP_REQ_OPERATING_CLASS)
@@ -430,6 +449,11 @@ static void rx_anqp_hs_query_list(struct hostapd_data *hapd, u8 subtype,
 		set_anqp_req(ANQP_REQ_HS_CAPABILITY_LIST, "HS Capability List",
 			     1, 0, 0, qi);
 		break;
+	case HS20_STYPE_WAN_METRICS:
+		set_anqp_req(ANQP_REQ_WAN_METRICS, "WAN Metrics",
+			     hapd->conf->hs20_wan_metrics != NULL,
+			     0, 0, qi);
+		break;
 	case HS20_STYPE_CONNECTION_CAPABILITY:
 		set_anqp_req(ANQP_REQ_CONNECTION_CAPABILITY,
 			     "Connection Capability",

src/ap/gas_serv.h

@@ -25,6 +25,8 @@
 	(1 << (ANQP_DOMAIN_NAME - ANQP_QUERY_LIST))
 #define ANQP_REQ_HS_CAPABILITY_LIST \
 	(0x10000 << HS20_STYPE_CAPABILITY_LIST)
+#define ANQP_REQ_WAN_METRICS \
+	(0x10000 << HS20_STYPE_WAN_METRICS)
 #define ANQP_REQ_CONNECTION_CAPABILITY \
 	(0x10000 << HS20_STYPE_CONNECTION_CAPABILITY)
 #define ANQP_REQ_OPERATING_CLASS \