def guess_payload_class(self, payload):
    if (self.underlayer.len > 28):
        return HSRPmd5
    else:
        return Packet.guess_payload_class(self, payload)
def guess_payload_class(self, payload):
    if (self.underlayer.len > 28):
        return HSRPmd5
    else:
        return Packet.guess_payload_class(self, payload)