@classmethod
def from_copy(cls, other):
    """
        Packet copy constructor
        """
    ret = cls()
    ret.app = other.app
    ret.transport = other.transport
    ret.network = other.network
    ret.link = other.link
    ret.payload = other.payload
    ret.type = other.type
    ret.time_stamp = other.time_stamp
    return ret
