create constructors for VmcExtRvc

src/lib.rs

@@ -1139,7 +1139,7 @@ impl DeviceTranform {
 }
 
 #[derive(Debug)]
-struct VmcExtRvc {
+pub struct VmcExtRvc {
     enable: bool,
     port: u16,
     ip_addr: Option<String>,
@@ -1208,6 +1208,18 @@ impl VmcMessage for VmcExtRvc {
     }
 }
 
+impl VmcExtRvc {
+    pub fn new(enable: bool, port: u16, ip_addr: Option<String>) -> MsgNewResult<Self> {
+        Ok(Self { enable, port, ip_addr})
+    }
+    pub fn new_vmc_message(enable: bool, port: u16, ip_addr: Option<String>) -> TraitMsgNewResult {
+        match Self::new(enable, port, ip_addr) {
+            Ok(val) => Ok(Box::new(val)),
+            Err(val) => Err(val)
+        }
+    }
+}
+
 #[derive(Debug)]
 struct VmcExtLight {
     name: String,