hostapd: Add vlan_file option to netifd.sh

Other VLAN related options are already being processed in netifd.sh
but the vlan_file option is missing. This option allows the mapping
of vlan IDs to network interfaces and will be used in dynamic VLAN
feature for binding stations to interfaces based on VLAN
assignments. The change is done similarly to the wpa_psk_file
option.

Signed-off-by: Gong Cheng <chengg11@yahoo.com>

SVN-Revision: 46652

package/network/services/hostapd/files/netifd.sh

@@ -140,6 +140,7 @@ hostapd_common_add_bss_config() {
 
 	config_add_int dynamic_vlan vlan_naming
 	config_add_string vlan_tagged_interface vlan_bridge
+	config_add_string vlan_file
 
 	config_add_string 'key1:wepkey' 'key2:wepkey' 'key3:wepkey' 'key4:wepkey' 'password:wpakey'
 
@@ -248,7 +249,7 @@ hostapd_set_bss_options() {
 				ownip \
 				eap_reauth_period dynamic_vlan \
 				vlan_naming vlan_tagged_interface \
-				vlan_bridge
+				vlan_bridge vlan_file
 
 			# legacy compatibility
 			[ -n "$auth_server" ] || json_get_var auth_server server
@@ -291,6 +292,10 @@ hostapd_set_bss_options() {
 					append bss_conf "vlan_bridge=$vlan_bridge" "$N"
 				[ -n "$vlan_tagged_interface" ] && \
 					append bss_conf "vlan_tagged_interface=$vlan_tagged_interface" "$N"
+				[ -n "$vlan_file" ] && {
+					[ -e "$vlan_file" ] || touch "$vlan_file"
+					append bss_conf "vlan_file=$vlan_file" "$N"
+				}
 			}
 		;;
 		wep)