struct mast_callbacks {
	int (*packet_encap)(struct device *mast, void *context,
			    struct sk_buff *skb, int flowref);
	int (*link_inquire)(struct device *mast, void *context);
};

struct device *mast_init(int family,
			 struct mast_callbacks *callbacks,
			 unsigned int flags,
			 unsigned int desired_unit,
			 unsigned int max_flowref,
			 void *context);

int mast_destroy(struct device *mast);

int mast_recv(struct device *mast, struct sk_buff *skb, int flowref);

/* free this skb as being useless, increment failure count. */
int mast_toast(struct device *mast, struct sk_buff *skb, int flowref);

int mast_linkstat(struct device *mast, int flowref,
		  int status);

int mast_setreference(struct device *mast,
		      int defaultSA);

int mast_setneighbor(struct device *mast,
		     struct sockaddr *source,
		     struct sockaddr *destination,
		     int flowref);