update constant

cmd/main.go

@@ -19,6 +19,7 @@ import (
 
 	D "github.com/xjasonlyu/tun2socks/common/dns"
 	S "github.com/xjasonlyu/tun2socks/common/stats"
+	C "github.com/xjasonlyu/tun2socks/constant"
 
 	// init logger
 	_ "github.com/xjasonlyu/tun2socks/common/log/simple"
@@ -27,9 +28,6 @@ import (
 const MTU = 1500
 
 var (
-	version     = "unknown version"
-	description = "A tun2socks implementation written in Go."
-
 	args            = new(CmdArgs)
 	postFlagsInitFn []func()
 
@@ -87,8 +85,7 @@ func main() {
 	flag.Parse()
 
 	if *args.Version {
-		fmt.Println("Go-tun2socks", version)
-		fmt.Println(description)
+		fmt.Println("Go-tun2socks", C.Version, C.BuildTime)
 		os.Exit(0)
 	}