def get_reservation_ports(session, reservation_id, model_name='Generic Traffic Generator Port'):
    """ Get all Generic Traffic Generator Port in reservation.

    :return: list of all Generic Traffic Generator Port resource objects in reservation
    """
    reservation_ports = []
    reservation = session.GetReservationDetails(reservation_id).ReservationDescription
    for resource in reservation.Resources:
        if resource.ResourceModelName == model_name:
            reservation_ports.append(resource)
    return reservation_ports