1/* net/atm/atmarp.h - RFC1577 ATM ARP */
2
3/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
4
5
6#ifndef _ATMCLIP_H
7#define _ATMCLIP_H
8
9#include <linux/netdevice.h>
10#include <linux/skbuff.h>
11#include <linux/atm.h>
12#include <linux/atmdev.h>
13#include <linux/atmarp.h>
14#include <linux/spinlock.h>
15#include <net/neighbour.h>
16
17
18#define CLIP_VCC(vcc) ((struct clip_vcc *) ((vcc)->user_back))
19#define NEIGH2ENTRY(neigh) ((struct atmarp_entry *) (neigh)->primary_key)
20
21
22struct clip_vcc {
23	struct atm_vcc	*vcc;		/* VCC descriptor */
24	struct atmarp_entry *entry;	/* ATMARP table entry, NULL if IP addr.
25					   isn't known yet */
26	int		xoff;		/* 1 if send buffer is full */
27	unsigned char	encap;		/* 0: NULL, 1: LLC/SNAP */
28	unsigned long	last_use;	/* last send or receive operation */
29	unsigned long	idle_timeout;	/* keep open idle for so many jiffies*/
30	void (*old_push)(struct atm_vcc *vcc,struct sk_buff *skb);
31					/* keep old push fn for chaining */
32	void (*old_pop)(struct atm_vcc *vcc,struct sk_buff *skb);
33					/* keep old pop fn for chaining */
34	struct clip_vcc	*next;		/* next VCC */
35};
36
37
38struct atmarp_entry {
39	u32		ip;		/* IP address */
40	struct clip_vcc	*vccs;		/* active VCCs; NULL if resolution is
41					   pending */
42	unsigned long	expires;	/* entry expiration time */
43	struct neighbour *neigh;	/* neighbour back-pointer */
44};
45
46
47#define PRIV(dev) ((struct clip_priv *) ((struct net_device *) (dev)+1))
48
49
50struct clip_priv {
51	int number;			/* for convenience ... */
52	spinlock_t xoff_lock;		/* ensures that pop is atomic (SMP) */
53	struct net_device_stats stats;
54	struct net_device *next;	/* next CLIP interface */
55};
56
57
58extern struct atm_vcc *atmarpd; /* ugly */
59extern struct neigh_table clip_tbl;
60
61int clip_create(int number);
62int clip_mkip(struct atm_vcc *vcc,int timeout);
63int clip_setentry(struct atm_vcc *vcc,u32 ip);
64int clip_encap(struct atm_vcc *vcc,int mode);
65void atm_clip_init(void);
66
67#endif
68