create FlowController interface

flowcontrol/interface.go

@@ -0,0 +1,17 @@
+package flowcontrol
+
+import "github.com/lucas-clemente/quic-go/protocol"
+
+// A FlowController handles the flow control
+type FlowController interface {
+	AddBytesSent(n protocol.ByteCount)
+	UpdateSendWindow(newOffset protocol.ByteCount) bool
+	SendWindowSize() protocol.ByteCount
+	UpdateHighestReceived(byteOffset protocol.ByteCount) protocol.ByteCount
+	IncrementHighestReceived(increment protocol.ByteCount)
+	AddBytesRead(n protocol.ByteCount)
+	MaybeTriggerBlocked() bool
+	MaybeTriggerWindowUpdate() (bool, protocol.ByteCount)
+	CheckFlowControlViolation() bool
+	GetHighestReceived() protocol.ByteCount
+}