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/* net/atm/atmarp.h - RFC1577 ATM ARP */

/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */

#ifndef _ATMCLIP_H

#define _ATMCLIP_H

#include <linux/netdevice.h>

#include <linux/skbuff.h>

#include <linux/atm.h>

#include <linux/atmdev.h>

#include <linux/atmarp.h>

#include <linux/spinlock.h>

#include <net/neighbour.h>

#define CLIP_VCC(vcc) ((struct clip_vcc *) ((vcc)->user_back))

#define NEIGH2ENTRY(neigh) ((struct atmarp_entry *) (neigh)->primary_key)

struct clip_vcc {

        struct atm_vcc  *vcc;           /* VCC descriptor */

        struct atmarp_entry *entry;     /* ATMARP table entry, NULL if IP addr.

                                           isn't known yet */

        int             xoff;           /* 1 if send buffer is full */

        unsigned char   encap;          /* 0: NULL, 1: LLC/SNAP */

        unsigned long   last_use;       /* last send or receive operation */

        unsigned long   idle_timeout;   /* keep open idle for so many jiffies*/

        void (*old_push)(struct atm_vcc *vcc,struct sk_buff *skb);

                                        /* keep old push fn for chaining */

        void (*old_pop)(struct atm_vcc *vcc,struct sk_buff *skb);

                                        /* keep old pop fn for chaining */

        struct clip_vcc *next;          /* next VCC */

};

struct atmarp_entry {

        u32             ip;             /* IP address */

        struct clip_vcc *vccs;          /* active VCCs; NULL if resolution is

                                           pending */

        unsigned long   expires;        /* entry expiration time */

        struct neighbour *neigh;        /* neighbour back-pointer */

};

#define PRIV(dev) ((struct clip_priv *) ((struct net_device *) (dev)+1))

struct clip_priv {

        int number;                     /* for convenience ... */

        spinlock_t xoff_lock;           /* ensures that pop is atomic (SMP) */

        struct net_device_stats stats;

        struct net_device *next;        /* next CLIP interface */

};

#ifdef __KERNEL__

struct atm_clip_ops {

        int (*clip_create)(int number);

        int (*clip_mkip)(struct atm_vcc *vcc,int timeout);

        int (*clip_setentry)(struct atm_vcc *vcc,u32 ip);

        int (*clip_encap)(struct atm_vcc *vcc,int mode);

        void (*clip_push)(struct atm_vcc *vcc,struct sk_buff *skb);

        int (*atm_init_atmarp)(struct atm_vcc *vcc);

        struct module *owner;

};

void atm_clip_ops_set(struct atm_clip_ops *);

int try_atm_clip_ops(void);

extern struct neigh_table *clip_tbl_hook;

extern struct atm_clip_ops *atm_clip_ops;

#endif

#endif