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#ifndef _NET_DN_DEV_H

#define _NET_DN_DEV_H

struct dn_dev;

struct dn_ifaddr {

        struct dn_ifaddr *ifa_next;

        struct dn_dev    *ifa_dev;

        dn_address       ifa_local;

        unsigned char    ifa_flags;

        unsigned char    ifa_scope;

        char             ifa_label[IFNAMSIZ];

};

#define DN_DEV_S_RU  0 /* Run - working normally   */

#define DN_DEV_S_CR  1 /* Circuit Rejected         */

#define DN_DEV_S_DS  2 /* Data Link Start          */

#define DN_DEV_S_RI  3 /* Routing Layer Initialize */

#define DN_DEV_S_RV  4 /* Routing Layer Verify     */

#define DN_DEV_S_RC  5 /* Routing Layer Complete   */

#define DN_DEV_S_OF  6 /* Off                      */

#define DN_DEV_S_HA  7 /* Halt                     */

/*

 * The dn_dev_parms structure contains the set of parameters

 * for each device (hence inclusion in the dn_dev structure)

 * and an array is used to store the default types of supported

 * device (in dn_dev.c).

 *

 * The type field matches the ARPHRD_ constants and is used in

 * searching the list for supported devices when new devices

 * come up.

 *

 * The mode field is used to find out if a device is broadcast,

 * multipoint, or pointopoint. Please note that DECnet thinks

 * different ways about devices to the rest of the kernel

 * so the normal IFF_xxx flags are invalid here. For devices

 * which can be any combination of the previously mentioned

 * attributes, you can set this on a per device basis by

 * installing an up() routine.

 *

 * The device state field, defines the initial state in which the

 * device will come up. In the dn_dev structure, it is the actual

 * state.

 *

 * Things have changed here. I've killed timer1 since its a user space

 * issue for a user space routing deamon to sort out. The kernel does

 * not need to be bothered with it.

 *

 * Timers:

 * t2 - Rate limit timer, min time between routing and hello messages

 * t3 - Hello timer, send hello messages when it expires

 *

 * Callbacks:

 * up() - Called to initialize device, return value can veto use of

 *        device with DECnet.

 * down() - Called to turn device off when it goes down

 * timer3() - Called when timer 3 goes off

 *

 * sysctl - Hook for sysctl things

 *

 */

struct dn_dev_parms {

        int type;                 /* ARPHRD_xxx                         */

        int mode;                 /* Broadcast, Unicast, Mulitpoint     */

#define DN_DEV_BCAST  1

#define DN_DEV_UCAST  2

#define DN_DEV_MPOINT 4

        int state;                /* Initial state                      */

        int forwarding;           /* 0=EndNode, 1=L1Router, 2=L2Router  */

        unsigned short blksize;   /* Block Size                         */

        unsigned long t2;         /* Default value of t2                */

        unsigned long t3;         /* Default value of t3                */

        int priority;             /* Priority to be a router            */

        char *name;               /* Name for sysctl                    */

        int ctl_name;             /* Index for sysctl                   */

        int  (*up)(struct net_device *);

        void (*down)(struct net_device *);

        void (*timer3)(struct net_device *);

        void *sysctl;

};

struct dn_dev {

        struct dn_ifaddr *ifa_list;

        struct net_device *dev;

        struct dn_dev_parms parms;

        char use_long;

        struct timer_list timer;

        unsigned long t3;

        struct neigh_parms *neigh_parms;

        unsigned char addr[ETH_ALEN];

        struct neighbour *router; /* Default router on circuit */

        struct neighbour *peer;   /* Peer on pointopoint links */

        unsigned long uptime;     /* Time device went up in jiffies */

};

struct dn_short_packet

{

        unsigned char   msgflg          __attribute__((packed));

        unsigned short  dstnode         __attribute__((packed));

        unsigned short  srcnode         __attribute__((packed));

        unsigned char   forward         __attribute__((packed));

};

struct dn_long_packet

{

        unsigned char   msgflg          __attribute__((packed));

        unsigned char   d_area          __attribute__((packed));

        unsigned char   d_subarea       __attribute__((packed));

        unsigned char   d_id[6]         __attribute__((packed));

        unsigned char   s_area          __attribute__((packed));

        unsigned char   s_subarea       __attribute__((packed));

        unsigned char   s_id[6]         __attribute__((packed));

        unsigned char   nl2             __attribute__((packed));

        unsigned char   visit_ct        __attribute__((packed));

        unsigned char   s_class         __attribute__((packed));

        unsigned char   pt              __attribute__((packed));

};

/*------------------------- DRP - Routing messages ---------------------*/

struct endnode_hello_message

{

        unsigned char   msgflg          __attribute__((packed));

        unsigned char   tiver[3]        __attribute__((packed));

        unsigned char   id[6]           __attribute__((packed));

        unsigned char   iinfo           __attribute__((packed));

        unsigned short  blksize         __attribute__((packed));

        unsigned char   area            __attribute__((packed));

        unsigned char   seed[8]         __attribute__((packed));

        unsigned char   neighbor[6]     __attribute__((packed));

        unsigned short  timer           __attribute__((packed));

        unsigned char   mpd             __attribute__((packed));

        unsigned char   datalen         __attribute__((packed));

        unsigned char   data[2]         __attribute__((packed));

};

struct rtnode_hello_message

{

        unsigned char   msgflg          __attribute__((packed));

        unsigned char   tiver[3]        __attribute__((packed));

        unsigned char   id[6]           __attribute__((packed));

        unsigned char   iinfo           __attribute__((packed));

        unsigned short  blksize         __attribute__((packed));

        unsigned char   priority        __attribute__((packed));

        unsigned char   area            __attribute__((packed));

        unsigned short  timer           __attribute__((packed));

        unsigned char   mpd             __attribute__((packed));

};

extern void dn_dev_init(void);

extern void dn_dev_cleanup(void);

extern int dn_dev_ioctl(unsigned int cmd, void *arg);

extern void dn_dev_devices_off(void);

extern void dn_dev_devices_on(void);

extern void dn_dev_init_pkt(struct sk_buff *skb);

extern void dn_dev_veri_pkt(struct sk_buff *skb);

extern void dn_dev_hello(struct sk_buff *skb);

extern void dn_dev_up(struct net_device *);

extern void dn_dev_down(struct net_device *);

extern struct net_device *decnet_default_device;

static __inline__ int dn_dev_islocal(struct net_device *dev, dn_address addr)

{

        struct dn_dev *dn_db = dev->dn_ptr;

        struct dn_ifaddr *ifa;

        if (dn_db == NULL) {

                printk(KERN_DEBUG "dn_dev_islocal: Called for non DECnet device\n");

                return 0;

        }

        for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next)

                if ((addr ^ ifa->ifa_local) == 0)

                        return 1;

        return 0;

}

#endif /* _NET_DN_DEV_H */