1. 根目录:
2. drivers
3. net
4. appletalk
5. ipddp.h

/*
 *	ipddp.h: Header for IP-over-DDP driver for Linux.
 */

#ifndef __LINUX_IPDDP_H
#define __LINUX_IPDDP_H

#ifdef __KERNEL__

#define SIOCADDIPDDPRT   (SIOCDEVPRIVATE)
#define SIOCDELIPDDPRT   (SIOCDEVPRIVATE+1)
#define SIOCFINDIPDDPRT  (SIOCDEVPRIVATE+2)

struct ipddp_route
{
        struct net_device *dev;             /* Carrier device */
        __be32 ip;                       /* IP address */
        struct atalk_addr at;              /* Gateway appletalk address */
        int flags;
        struct ipddp_route *next;
};

#define IPDDP_ENCAP	1
#define IPDDP_DECAP	2

#endif	/* __KERNEL__ */
#endif	/* __LINUX_IPDDP_H */