Interworking: Add IP Address Type Availability element (AP)

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

hostapd/config_file.c

@@ -2457,6 +2457,17 @@ static int hostapd_config_fill(struct hostapd_config *conf,
 				os_memcpy(bss->network_auth_type + 3,
 					  pos + 2, redirect_url_len);
 			bss->network_auth_type_len = 3 + redirect_url_len;
+		} else if (os_strcmp(buf, "ipaddr_type_availability") == 0) {
+			if (hexstr2bin(pos, &bss->ipaddr_type_availability, 1))
+			{
+				wpa_printf(MSG_ERROR, "Line %d: Invalid "
+					   "ipaddr_type_availability '%s'",
+					   line, pos);
+				bss->ipaddr_type_configured = 0;
+				errors++;
+				return errors;
+			}
+			bss->ipaddr_type_configured = 1;
 		} else if (os_strcmp(buf, "gas_frag_limit") == 0) {
 			bss->gas_frag_limit = atoi(pos);
 		} else if (os_strcmp(buf, "gas_comeback_delay") == 0) {

hostapd/hostapd.conf

@@ -1337,6 +1337,24 @@ own_ip_addr=127.0.0.1
 #network_auth_type=00
 #network_auth_type=02http://www.example.com/redirect/me/here/
 
+# IP Address Type Availability
+# format: <1-octet encoded value as hex str>
+# (ipv4_type & 0x3f) << 2 | (ipv6_type & 0x3)
+# ipv4_type:
+# 0 = Address type not available
+# 1 = Public IPv4 address available
+# 2 = Port-restricted IPv4 address available
+# 3 = Single NATed private IPv4 address available
+# 4 = Double NATed private IPv4 address available
+# 5 = Port-restricted IPv4 address and single NATed IPv4 address available
+# 6 = Port-restricted IPv4 address and double NATed IPv4 address available
+# 7 = Availability of the address type is not known
+# ipv6_type:
+# 0 = Address type not available
+# 1 = Address type available
+# 2 = Availability of the address type not known
+#ipaddr_type_availability=14
+
 ##### Hotspot 2.0 #############################################################
 
 # Enable Hotspot 2.0 support

src/ap/ap_config.h

@@ -395,6 +395,10 @@ struct hostapd_bss_config {
 	u8 *network_auth_type;
 	size_t network_auth_type_len;
 
+	/* IEEE 802.11u - IP Address Type Availability */
+	u8 ipaddr_type_availability;
+	u8 ipaddr_type_configured;
+
 	u16 gas_comeback_delay;
 	int gas_frag_limit;
 

src/ap/gas_serv.c

@@ -141,6 +141,8 @@ static void anqp_add_capab_list(struct hostapd_data *hapd,
 		wpabuf_put_le16(buf, ANQP_NETWORK_AUTH_TYPE);
 	if (hapd->conf->roaming_consortium)
 		wpabuf_put_le16(buf, ANQP_ROAMING_CONSORTIUM);
+	if (hapd->conf->ipaddr_type_configured)
+		wpabuf_put_le16(buf, ANQP_IP_ADDR_TYPE_AVAILABILITY);
 	gas_anqp_set_element_len(buf, len);
 }
 
@@ -194,6 +196,17 @@ static void anqp_add_roaming_consortium(struct hostapd_data *hapd,
 }
 
 
+static void anqp_add_ip_addr_type_availability(struct hostapd_data *hapd,
+					       struct wpabuf *buf)
+{
+	if (hapd->conf->ipaddr_type_configured) {
+		wpabuf_put_le16(buf, ANQP_IP_ADDR_TYPE_AVAILABILITY);
+		wpabuf_put_le16(buf, 1);
+		wpabuf_put_u8(buf, hapd->conf->ipaddr_type_availability);
+	}
+}
+
+
 static struct wpabuf *
 gas_serv_build_gas_resp_payload(struct hostapd_data *hapd,
 				unsigned int request,
@@ -213,6 +226,8 @@ gas_serv_build_gas_resp_payload(struct hostapd_data *hapd,
 		anqp_add_network_auth_type(hapd, buf);
 	if (request & ANQP_REQ_ROAMING_CONSORTIUM)
 		anqp_add_roaming_consortium(hapd, buf);
+	if (request & ANQP_REQ_IP_ADDR_TYPE_AVAILABILITY)
+		anqp_add_ip_addr_type_availability(hapd, buf);
 
 	return buf;
 }
@@ -277,6 +292,11 @@ static void rx_anqp_query_list_id(struct hostapd_data *hapd, u16 info_id,
 		set_anqp_req(ANQP_REQ_ROAMING_CONSORTIUM, "Roaming Consortium",
 			     hapd->conf->roaming_consortium != NULL, 0, 0, qi);
 		break;
+	case ANQP_IP_ADDR_TYPE_AVAILABILITY:
+		set_anqp_req(ANQP_REQ_IP_ADDR_TYPE_AVAILABILITY,
+			     "IP Addr Type Availability",
+			     hapd->conf->ipaddr_type_configured,
+			     0, 0, qi);
 	default:
 		wpa_printf(MSG_DEBUG, "ANQP: Unsupported Info Id %u",
 			   info_id);

src/ap/gas_serv.h

@@ -17,6 +17,8 @@
 	(1 << (ANQP_NETWORK_AUTH_TYPE - ANQP_QUERY_LIST))
 #define ANQP_REQ_ROAMING_CONSORTIUM \
 	(1 << (ANQP_ROAMING_CONSORTIUM - ANQP_QUERY_LIST))
+#define ANQP_REQ_IP_ADDR_TYPE_AVAILABILITY \
+	(1 << (ANQP_IP_ADDR_TYPE_AVAILABILITY - ANQP_QUERY_LIST))
 
 /* To account for latencies between hostapd and external ANQP processor */
 #define GAS_SERV_COMEBACK_DELAY_FUDGE 10