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
20 struct sk_buff;
21
22 struct 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
38 struct 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
47 struct 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