static int ni52_open(struct net_device *dev);
static int ni52_close(struct net_device *dev);
static int ni52_send_packet(struct sk_buff *,struct net_device *);
static int ni52_open(struct net_device *dev);
static int ni52_close(struct net_device *dev);
static int ni52_send_packet(struct sk_buff *,struct net_device *);