implement the IETF draft BLOCKED and STREAM_BLOCKED frames

internal/wire/stream_blocked_frame.go

@@ -0,0 +1,44 @@
+package wire
+
+import (
+	"bytes"
+
+	"github.com/lucas-clemente/quic-go/internal/protocol"
+	"github.com/lucas-clemente/quic-go/internal/utils"
+)
+
+// A StreamBlockedFrame in QUIC
+type StreamBlockedFrame struct {
+	StreamID protocol.StreamID
+}
+
+// ParseStreamBlockedFrame parses a STREAM_BLOCKED frame
+func ParseStreamBlockedFrame(r *bytes.Reader, version protocol.VersionNumber) (*StreamBlockedFrame, error) {
+	frame := &StreamBlockedFrame{}
+
+	// read the TypeByte
+	if _, err := r.ReadByte(); err != nil {
+		return nil, err
+	}
+	sid, err := utils.GetByteOrder(version).ReadUint32(r)
+	if err != nil {
+		return nil, err
+	}
+	frame.StreamID = protocol.StreamID(sid)
+	return frame, nil
+}
+
+// Write writes a STREAM_BLOCKED frame
+func (f *StreamBlockedFrame) Write(b *bytes.Buffer, version protocol.VersionNumber) error {
+	if !version.UsesMaxDataFrame() {
+		return (&blockedFrameLegacy{StreamID: f.StreamID}).Write(b, version)
+	}
+	b.WriteByte(0x09)
+	utils.GetByteOrder(version).WriteUint32(b, uint32(f.StreamID))
+	return nil
+}
+
+// MinLength of a written frame
+func (f *StreamBlockedFrame) MinLength(version protocol.VersionNumber) (protocol.ByteCount, error) {
+	return 1 + 4, nil
+}