add new interface for init configuration (#15)

params_windows.go

@@ -0,0 +1,18 @@
+package water
+
+// PlatformSpecificParams defines parameters in Config that are specific to
+// Windows. A zero-value of such type is valid.
+type PlatformSpecificParams struct {
+	// ComponentID associates with the virtual adapter that exists in Windows.
+	// This is usually configured when driver for the adapter is installed. A
+	// zero-value of this field, i.e., an empty string, causes the interface to
+	// use the default ComponentId. The default ComponentId is set to tap0901,
+	// the one used by OpenVPN.
+	ComponentID string
+}
+
+func defaultPlatformSpecificParams() PlatformSpecificParams {
+	return PlatformSpecificParams{
+		ComponentId: "tap0901",
+	}
+}