diff --git a/src/main.go b/src/main.go
index 7d86716..e43176c 100644
--- a/src/main.go
+++ b/src/main.go
@@ -8,6 +8,11 @@ import (
 	"strconv"
 )
 
+const (
+	ExitSetupSuccess = 0
+	ExitSetupFailed  = 1
+)
+
 const (
 	ENV_WG_TUN_FD  = "WG_TUN_FD"
 	ENV_WG_UAPI_FD = "WG_UAPI_FD"