def __init__(self, ryuapp):
super(PacketLib, self).__init__()
self.gateway = GatewayState(self.db.gateway_get_all())
self.packet_arp = PacketARP(self, ryuapp)
self.packet_ipv4 = PacketIPv4(self, ryuapp)
self.packet_group = PacketGroup(self, ryuapp)
self.flows = {}
