use the new crypto/tls QUIC Transport (#3860)

crypto_stream.go

@@ -71,17 +71,9 @@ func (s *cryptoStreamImpl) HandleCryptoFrame(f *wire.CryptoFrame) error {
 
 // GetCryptoData retrieves data that was received in CRYPTO frames
 func (s *cryptoStreamImpl) GetCryptoData() []byte {
-	if len(s.msgBuf) < 4 {
-		return nil
-	}
-	msgLen := 4 + int(s.msgBuf[1])<<16 + int(s.msgBuf[2])<<8 + int(s.msgBuf[3])
-	if len(s.msgBuf) < msgLen {
-		return nil
-	}
-	msg := make([]byte, msgLen)
-	copy(msg, s.msgBuf[:msgLen])
-	s.msgBuf = s.msgBuf[msgLen:]
-	return msg
+	b := s.msgBuf
+	s.msgBuf = nil
+	return b
 }
 
 func (s *cryptoStreamImpl) Finish() error {