use go 1.12

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

vendor/github.com/lucas-clemente/quic-go/internal/flowcontrol/interface.go

@@ -0,0 +1,38 @@
+package flowcontrol
+
+import "github.com/lucas-clemente/quic-go/internal/protocol"
+
+type flowController interface {
+	// for sending
+	SendWindowSize() protocol.ByteCount
+	UpdateSendWindow(protocol.ByteCount)
+	AddBytesSent(protocol.ByteCount)
+	// for receiving
+	AddBytesRead(protocol.ByteCount)
+	GetWindowUpdate() protocol.ByteCount // returns 0 if no update is necessary
+	MaybeQueueWindowUpdate()             //  queues a window update, if necessary
+	IsNewlyBlocked() (bool, protocol.ByteCount)
+}
+
+// A StreamFlowController is a flow controller for a QUIC stream.
+type StreamFlowController interface {
+	flowController
+	// for receiving
+	// UpdateHighestReceived should be called when a new highest offset is received
+	// final has to be to true if this is the final offset of the stream, as contained in a STREAM frame with FIN bit, and the RST_STREAM frame
+	UpdateHighestReceived(offset protocol.ByteCount, final bool) error
+}
+
+// The ConnectionFlowController is the flow controller for the connection.
+type ConnectionFlowController interface {
+	flowController
+}
+
+type connectionFlowControllerI interface {
+	ConnectionFlowController
+	// The following two methods are not supposed to be called from outside this packet, but are needed internally
+	// for sending
+	EnsureMinimumWindowSize(protocol.ByteCount)
+	// for receiving
+	IncrementHighestReceived(protocol.ByteCount) error
+}