implement parsing and writing of the HANDSHAKE_DONE frame

internal/wire/frame_parser.go

@@ -85,6 +85,8 @@ func (p *frameParser) parseFrame(r *bytes.Reader, typeByte byte, encLevel protoc
 			frame, err = parsePathResponseFrame(r, p.version)
 		case 0x1c, 0x1d:
 			frame, err = parseConnectionCloseFrame(r, p.version)
+		case 0x1e:
+			frame, err = parseHandshakeDoneFrame(r, p.version)
 		default:
 			err = errors.New("unknown frame type")
 		}

internal/wire/frame_parser_test.go

@@ -271,6 +271,15 @@ var _ = Describe("Frame parsing", func() {
 		Expect(frame).To(Equal(f))
 	})
 
+	It("unpacks HANDSHAKE_DONE frames", func() {
+		f := &HandshakeDoneFrame{}
+		buf := &bytes.Buffer{}
+		Expect(f.Write(buf, versionIETFFrames)).To(Succeed())
+		frame, err := parser.ParseNext(bytes.NewReader(buf.Bytes()), protocol.Encryption1RTT)
+		Expect(err).ToNot(HaveOccurred())
+		Expect(frame).To(Equal(f))
+	})
+
 	It("errors on invalid type", func() {
 		_, err := parser.ParseNext(bytes.NewReader([]byte{0x42}), protocol.Encryption1RTT)
 		Expect(err).To(MatchError("FRAME_ENCODING_ERROR (frame type: 0x42): unknown frame type"))
@@ -308,6 +317,7 @@ var _ = Describe("Frame parsing", func() {
 			&PathChallengeFrame{},
 			&PathResponseFrame{},
 			&ConnectionCloseFrame{},
+			&HandshakeDoneFrame{},
 		}
 
 		var framesSerialized [][]byte

internal/wire/handshake_done_frame.go

@@ -0,0 +1,28 @@
+package wire
+
+import (
+	"bytes"
+
+	"github.com/lucas-clemente/quic-go/internal/protocol"
+)
+
+// A HandshakeDoneFrame is a HANDSHAKE_DONE frame
+type HandshakeDoneFrame struct{}
+
+// ParseHandshakeDoneFrame parses a HandshakeDone frame
+func parseHandshakeDoneFrame(r *bytes.Reader, _ protocol.VersionNumber) (*HandshakeDoneFrame, error) {
+	if _, err := r.ReadByte(); err != nil {
+		return nil, err
+	}
+	return &HandshakeDoneFrame{}, nil
+}
+
+func (f *HandshakeDoneFrame) Write(b *bytes.Buffer, _ protocol.VersionNumber) error {
+	b.WriteByte(0x1e)
+	return nil
+}
+
+// Length of a written frame
+func (f *HandshakeDoneFrame) Length(_ protocol.VersionNumber) protocol.ByteCount {
+	return 1
+}