diff --git a/pkg/common/types.go b/pkg/common/types.go
index 159d084..4d4880b 100644
--- a/pkg/common/types.go
+++ b/pkg/common/types.go
@@ -4,6 +4,13 @@ import (
 	"time"
 )
 
+// Destination type constants
+const (
+	DESTINATION_SINGLE = 0x00
+	DESTINATION_GROUP  = 0x01
+	DESTINATION_PLAIN  = 0x02
+)
+
 // Transport related types
 type TransportMode byte
 type PathStatus byte