HS 2.0: Add advertising of Operating Class Indication

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

hostapd/config_file.c

@@ -2573,6 +2573,34 @@ 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_operating_class") == 0) {
+			u8 *oper_class;
+			size_t oper_class_len;
+			oper_class_len = os_strlen(pos);
+			if (oper_class_len < 2 || (oper_class_len & 0x01)) {
+				wpa_printf(MSG_ERROR, "Line %d: Invalid "
+					   "hs20_operating_class '%s'",
+					   line, pos);
+				errors++;
+				return errors;
+			}
+			oper_class_len /= 2;
+			oper_class = os_malloc(oper_class_len);
+			if (oper_class == NULL) {
+				errors++;
+				return errors;
+			}
+			if (hexstr2bin(pos, oper_class, oper_class_len)) {
+				wpa_printf(MSG_ERROR, "Line %d: Invalid "
+					   "hs20_operating_class '%s'",
+					   line, pos);
+				os_free(oper_class);
+				errors++;
+				return errors;
+			}
+			os_free(bss->hs20_operating_class);
+			bss->hs20_operating_class = oper_class;
+			bss->hs20_operating_class_len = oper_class_len;
 #endif /* CONFIG_HS20 */
 		} else {
 			wpa_printf(MSG_ERROR, "Line %d: unknown configuration "

hostapd/hostapd.conf

@@ -1400,6 +1400,15 @@ own_ip_addr=127.0.0.1
 # forging such frames to other stations in the BSS.
 #disable_dgaf=1
 
+# Operating Class Indication
+# List of operating classes the BSSes in this ESS use. The Global operating
+# classes in Table E-4 of IEEE Std 802.11-2012 Annex E define the values that
+# can be used in this.
+# format: hexdump of operating class octets
+# for example, operating classes 81 (2.4 GHz channels 1-13) and 115 (5 GHz
+# channels 36-48):
+#hs20_operating_class=5173
+
 ##### Multiple BSSID support ##################################################
 #
 # Above configuration is using the default interface (wlan#, or multi-SSID VLAN

src/ap/ap_config.c

@@ -505,6 +505,10 @@ static void hostapd_config_free_bss(struct hostapd_bss_config *conf)
 #ifdef CONFIG_RADIUS_TEST
 	os_free(conf->dump_msk_file);
 #endif /* CONFIG_RADIUS_TEST */
+
+#ifdef CONFIG_HS20
+	os_free(conf->hs20_operating_class);
+#endif /* CONFIG_HS20 */
 }
 
 

src/ap/ap_config.h

@@ -410,6 +410,8 @@ struct hostapd_bss_config {
 #ifdef CONFIG_HS20
 	int hs20;
 	int disable_dgaf;
+	u8 *hs20_operating_class;
+	u8 hs20_operating_class_len;
 #endif /* CONFIG_HS20 */
 
 	u8 wps_rf_bands; /* RF bands for WPS (WPS_RF_*) */

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_operating_class)
+		wpabuf_put_u8(buf, HS20_STYPE_OPERATING_CLASS);
 	gas_anqp_set_element_len(buf, len);
 }
 
@@ -251,6 +253,22 @@ static void anqp_add_domain_name(struct hostapd_data *hapd, struct wpabuf *buf)
 }
 
 
+static void anqp_add_operating_class(struct hostapd_data *hapd,
+				     struct wpabuf *buf)
+{
+	if (hapd->conf->hs20_operating_class) {
+		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_OPERATING_CLASS);
+		wpabuf_put_u8(buf, 0); /* Reserved */
+		wpabuf_put_data(buf, hapd->conf->hs20_operating_class,
+				hapd->conf->hs20_operating_class_len);
+		gas_anqp_set_element_len(buf, len);
+	}
+}
+
+
 static struct wpabuf *
 gas_serv_build_gas_resp_payload(struct hostapd_data *hapd,
 				unsigned int request,
@@ -279,6 +297,8 @@ 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_OPERATING_CLASS)
+		anqp_add_operating_class(hapd, buf);
 
 	return buf;
 }
@@ -390,6 +410,11 @@ 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_OPERATING_CLASS:
+		set_anqp_req(ANQP_REQ_OPERATING_CLASS, "Operating Class",
+			     hapd->conf->hs20_operating_class != NULL,
+			     0, 0, qi);
+		break;
 	default:
 		wpa_printf(MSG_DEBUG, "ANQP: Unsupported HS 2.0 subtype %u",
 			   subtype);

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_OPERATING_CLASS \
+	(0x10000 << HS20_STYPE_OPERATING_CLASS)
 
 /* To account for latencies between hostapd and external ANQP processor */
 #define GAS_SERV_COMEBACK_DELAY_FUDGE 10