refactor: Some adjustments

adapter/provider/vehicle.go

@@ -58,7 +58,7 @@ func (h *HTTPVehicle) Read() ([]byte, error) {
 	}
 
 	req, err := http.NewRequest(http.MethodGet, uri.String(), nil)
-	req.Header.Set("user-agent", netHttp.UA)
+	req.Header.Set("User-Agent", netHttp.UA)
 
 	if err != nil {
 		return nil, err

listener/tun/ipstack/gvisor/handler.go

@@ -27,7 +27,7 @@ type GVHandler struct {
 func (gh *GVHandler) HandleTCP(tunConn adapter.TCPConn) {
 	id := tunConn.ID()
 
-	rAddr := &net.UDPAddr{
+	rAddr := &net.TCPAddr{
 		IP:   net.IP(id.LocalAddress),
 		Port: int(id.LocalPort),
 		Zone: "",