diff --git a/quic_connection.go b/quic_connection.go
index 38c7255..7db4899 100644
--- a/quic_connection.go
+++ b/quic_connection.go
@@ -6,39 +6,51 @@ import (
 	"github.com/quic-go/quic-go"
 )
 
-type quicGoReceiveStream struct {
+type QuicGoReceiveStream struct {
 	stream *quic.ReceiveStream
 }
 
-func (s *quicGoReceiveStream) ID() int64 {
+func NewQuicGoReceiveStream(stream *quic.ReceiveStream) *QuicGoReceiveStream {
+	return &QuicGoReceiveStream{
+		stream: stream,
+	}
+}
+
+func (s *QuicGoReceiveStream) ID() int64 {
 	return int64(s.stream.StreamID())
 }
 
-func (s *quicGoReceiveStream) CancelRead(c uint64) {
+func (s *QuicGoReceiveStream) CancelRead(c uint64) {
 	s.stream.CancelRead(quic.StreamErrorCode(c))
 }
 
-func (c *quicGoReceiveStream) Read(p []byte) (n int, err error) {
+func (c *QuicGoReceiveStream) Read(p []byte) (n int, err error) {
 	return c.stream.Read(p)
 }
 
-type quicGoSendStream struct {
+type QuicGoSendStream struct {
 	stream *quic.SendStream
 }
 
-func (s *quicGoSendStream) ID() int64 {
+func NewQuicstream(stream *quic.SendStream) *QuicGoSendStream {
+	return &QuicGoSendStream{
+		stream: stream,
+	}
+}
+
+func (s *QuicGoSendStream) ID() int64 {
 	return int64(s.stream.StreamID())
 }
 
-func (s *quicGoSendStream) Write(b []byte) (int, error) {
+func (s *QuicGoSendStream) Write(b []byte) (int, error) {
 	return s.stream.Write(b)
 }
 
-func (s *quicGoSendStream) Close() error {
+func (s *QuicGoSendStream) Close() error {
 	return s.stream.Close()
 }
 
-func (s *quicGoSendStream) CancelWrite(c uint64) {
+func (s *QuicGoSendStream) CancelWrite(c uint64) {
 	s.stream.CancelWrite(quic.StreamErrorCode(c))
 }
 
@@ -65,7 +77,7 @@ func (c *QUICGoConnection) OpenUniStreamSync(ctx context.Context) (SendStream, e
 	if err != nil {
 		return nil, err
 	}
-	return &quicGoSendStream{
+	return &QuicGoSendStream{
 		stream: s,
 	}, nil
 }
@@ -75,7 +87,7 @@ func (c *QUICGoConnection) AcceptUniStream(ctx context.Context) (ReceiveStream,
 	if err != nil {
 		return nil, err
 	}
-	return &quicGoReceiveStream{
+	return &QuicGoReceiveStream{
 		stream: s,
 	}, nil
 }
diff --git a/session.go b/session.go
index 62f7576..f17e2a7 100644
--- a/session.go
+++ b/session.go
@@ -53,9 +53,25 @@ type Session struct {
 	qlog *qlog.Logger
 }
 
+// NewSession creates a new roq session. QUIC connection is handled by roq.
 func NewSession(conn Connection, acceptDatagrams bool, qlogger *qlog.Logger) (*Session, error) {
+	s := newSession(conn, acceptDatagrams, qlogger)
+	s.start()
+
+	return s, nil
+}
+
+// NewSessionWithAppHandeledConn creates a new roq session. QUIC connection is handled by application.
+// HandleDatagram and HandleUniStreamWithFlowID have to be  called for each datagram / new stream.
+func NewSessionWithAppHandeledConn(conn Connection, acceptDatagrams bool, qlogger *qlog.Logger) (*Session, error) {
+	s := newSession(conn, acceptDatagrams, qlogger)
+
+	return s, nil
+}
+
+func newSession(conn Connection, acceptDatagrams bool, qlogger *qlog.Logger) *Session {
 	ctx, cancel := context.WithCancel(context.Background())
-	s := &Session{
+	return &Session{
 		receiveBufferSize: defaultReceiveBufferSize,
 		acceptDatagrams:   acceptDatagrams,
 		conn:              conn,
@@ -69,8 +85,6 @@ func NewSession(conn Connection, acceptDatagrams bool, qlogger *qlog.Logger) (*S
 		cancelCtx:         cancel,
 		qlog:              qlogger,
 	}
-	s.start()
-	return s, nil
 }
 
 func (s *Session) start() {
@@ -176,11 +190,14 @@ func (s *Session) receiveDatagrams() error {
 		if err != nil {
 			return err
 		}
-		s.handleDatagram(dgram)
+		s.HandleDatagram(dgram)
 	}
 }
 
-func (s *Session) handleDatagram(datagram []byte) {
+// HandleUniStreamWithFlowID handles a datagram.
+// If QUIC connection is handled by the application, this function has to be called by the application
+// for each datagram that belongs to belongs to the roq connnection.
+func (s *Session) HandleDatagram(datagram []byte) {
 	flowID, n, err := quicvarint.Parse(datagram)
 	if err != nil {
 		s.closeWithError(ErrRoQPacketError, "invalid flow ID")
@@ -220,13 +237,10 @@ func (s *Session) handleDatagram(datagram []byte) {
 	f.push(b)
 }
 
-func (s *Session) handleUniStream(rs ReceiveStream) {
-	reader := quicvarint.NewReader(rs)
-	flowID, err := quicvarint.Read(reader)
-	if err != nil {
-		s.closeWithError(ErrRoQPacketError, "invalid flow ID")
-		return
-	}
+// HandleUniStreamWithFlowID handles a new flow with the flowID allready parsed.
+// If QUIC connection is handled by the application, this function has to be called by the application
+// for each new QUIC stream containing a roq floqID.
+func (s *Session) HandleUniStreamWithFlowID(flowID uint64, rs ReceiveStream) {
 	if s.qlog != nil {
 		s.qlog.Log(roqqlog.StreamOpenedEvent{
 			FlowID:   flowID,
@@ -244,3 +258,14 @@ func (s *Session) handleUniStream(rs ReceiveStream) {
 	}
 	f.readStream(rs)
 }
+
+func (s *Session) handleUniStream(rs ReceiveStream) {
+	reader := quicvarint.NewReader(rs)
+	flowID, err := quicvarint.Read(reader)
+	if err != nil {
+		s.closeWithError(ErrRoQPacketError, "invalid flow ID")
+		return
+	}
+
+	s.HandleUniStreamWithFlowID(flowID, rs)
+}