use go 1.12

Signed-off-by: hongming <talonwan@yunify.com>

vendor/github.com/lucas-clemente/quic-go/crypto_stream.go

@@ -0,0 +1,42 @@
+package quic
+
+import (
+	"io"
+
+	"github.com/lucas-clemente/quic-go/internal/flowcontrol"
+	"github.com/lucas-clemente/quic-go/internal/protocol"
+	"github.com/lucas-clemente/quic-go/internal/wire"
+)
+
+type cryptoStream interface {
+	StreamID() protocol.StreamID
+	io.Reader
+	io.Writer
+	handleStreamFrame(*wire.StreamFrame) error
+	hasData() bool
+	popStreamFrame(protocol.ByteCount) (*wire.StreamFrame, bool)
+	closeForShutdown(error)
+	setReadOffset(protocol.ByteCount)
+	// methods needed for flow control
+	getWindowUpdate() protocol.ByteCount
+	handleMaxStreamDataFrame(*wire.MaxStreamDataFrame)
+}
+
+type cryptoStreamImpl struct {
+	*stream
+}
+
+var _ cryptoStream = &cryptoStreamImpl{}
+
+func newCryptoStream(sender streamSender, flowController flowcontrol.StreamFlowController, version protocol.VersionNumber) cryptoStream {
+	str := newStream(version.CryptoStreamID(), sender, flowController, version)
+	return &cryptoStreamImpl{str}
+}
+
+// SetReadOffset sets the read offset.
+// It is only needed for the crypto stream.
+// It must not be called concurrently with any other stream methods, especially Read and Write.
+func (s *cryptoStreamImpl) setReadOffset(offset protocol.ByteCount) {
+	s.receiveStream.readOffset = offset
+	s.receiveStream.frameQueue.readPos = offset
+}