1/* SPDX-License-Identifier: GPL-2.0 */
2/* net/atm/atmarp.h - RFC1577 ATM ARP */
3
4/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
5
6
7#ifndef _ATMCLIP_H
8#define _ATMCLIP_H
9
10#include <linux/netdevice.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
20struct sk_buff;
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 struct clip_vcc *vccs; /* active VCCs; NULL if resolution is
40 pending */
41 unsigned long expires; /* entry expiration time */
42 struct neighbour *neigh; /* neighbour back-pointer */
43};
44
45#define PRIV(dev) ((struct clip_priv *) netdev_priv(dev))
46
47struct clip_priv {
48 int number; /* for convenience ... */
49 spinlock_t xoff_lock; /* ensures that pop is atomic (SMP) */
50 struct net_device *next; /* next CLIP interface */
51};
52
53#endif
54