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