cmd/client/main.go | 15 ++++++++++-----

diff --git a/cmd/client/main.go b/cmd/client/main.go
index 7ff841c8e9d553f2440ae58f3616f47d490084655a0679bb6ec238cdbe2ab3ab..fadaf51fd28367cfbed9a8468f666009e8433415a1dfffb436a083f2b60b2243 100644
--- a/cmd/client/main.go
+++ b/cmd/client/main.go
@@ -162,10 +162,6 @@ 	defer ctrl.Close()
 	if err = ctrl.SetNoDelay(true); err != nil {
 		log.Fatalln("nodelay:", err)
 	}
-	if _, err = io.Copy(ctrl, strings.NewReader(vors.NoisePrologue)); err != nil {
-		log.Fatalln("handshake: write prologue", err)
-		return
-	}
 
 	hs, err := noise.NewHandshakeState(noise.Config{
 		CipherSuite: vors.NoiseCipherSuite,
@@ -181,7 +177,16 @@ 	buf, _, _, err := hs.WriteMessage(nil, []byte(*Name+" "+*Room+" "+*passwd))
 	if err != nil {
 		log.Fatalln("handshake encrypt:", err)
 	}
-	if err = vors.PktWrite(ctrl, buf); err != nil {
+	buf = append(
+		append(
+			[]byte(vors.NoisePrologue),
+			byte((len(buf) & 0xFF00) >> 8),
+			byte((len(buf) & 0x00FF) >> 0),
+		),
+		buf...
+	)
+	_, err = io.Copy(ctrl, bytes.NewReader(buf))
+	if err != nil {
 		log.Fatalln("write handshake:", err)
 		return
 	}