#ifndef _NET_STP_H#define _NET_STP_H struct stp_proto {	unsigned char	group_address[ETH_ALEN];	void		(*rcv)(const struct stp_proto *, struct sk_buff *,			       struct net_device *);	void		*data;}; int stp_proto_register(const struct stp_proto *proto);void stp_proto_unregister(const struct stp_proto *proto); #endif /* _NET_STP_H */