Fix copy early conn

experimental/clashapi/trafficontrol/tracker.go

@@ -79,6 +79,10 @@ func (tt *tcpTracker) Leave() {
 	tt.manager.Leave(tt)
 }
 
+func (tt *tcpTracker) Upstream() any {
+	return tt.Conn
+}
+
 func NewTCPTracker(conn net.Conn, manager *Manager, metadata Metadata, router adapter.Router, rule adapter.Rule) *tcpTracker {
 	uuid, _ := uuid.NewV4()
 
@@ -166,6 +170,10 @@ func (ut *udpTracker) Leave() {
 	ut.manager.Leave(ut)
 }
 
+func (ut *udpTracker) Upstream() any {
+	return ut.PacketConn
+}
+
 func NewUDPTracker(conn N.PacketConn, manager *Manager, metadata Metadata, router adapter.Router, rule adapter.Rule) *udpTracker {
 	uuid, _ := uuid.NewV4()
 

outbound/default.go

@@ -49,6 +49,15 @@ func NewConnection(ctx context.Context, this N.Dialer, conn net.Conn, metadata a
 	if err != nil {
 		return N.HandshakeFailure(conn, err)
 	}
+	if cachedReader, isCached := conn.(N.CachedReader); isCached {
+		payload := cachedReader.ReadCached()
+		if payload != nil && !payload.IsEmpty() {
+			_, err = outConn.Write(payload.Bytes())
+			if err != nil {
+				return err
+			}
+		}
+	}
 	return bufio.CopyConn(ctx, conn, outConn)
 }
 
@@ -122,7 +131,7 @@ func connectPacketConnection(ctx context.Context, this N.Dialer, conn N.PacketCo
 }
 
 func CopyEarlyConn(ctx context.Context, conn net.Conn, serverConn net.Conn) error {
-	if cachedReader, isCached := serverConn.(N.CachedReader); isCached {
+	if cachedReader, isCached := conn.(N.CachedReader); isCached {
 		payload := cachedReader.ReadCached()
 		if payload != nil && !payload.IsEmpty() {
 			_, err := serverConn.Write(payload.Bytes())