text: #ifndef _NET_INET_DATALINK_H_
  #define _NET_INET_DATALINK_H_
  
  struct datalink_proto {
  	unsigned short	type_len;
  	unsigned char	type[8];
  	const char	*string_name;
  	unsigned short	header_length;
  	int	(*rcvfunc)(struct sk_buff *, struct device *, 
  				struct packet_type *);
  	void	(*datalink_header)(struct datalink_proto *, struct sk_buff *,
  					unsigned char *);
  	struct datalink_proto	*next;
  };
  
  #endif
  