include/net/atmclip.h

   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
  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         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
  50 struct 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
  58 extern struct atm_vcc *atmarpd; /* ugly */
  59 extern struct neigh_table clip_tbl;
  60
  61 int clip_create(int number);
  62 int clip_mkip(struct atm_vcc *vcc,int timeout);
  63 int clip_setentry(struct atm_vcc *vcc,u32 ip);
  64 int clip_encap(struct atm_vcc *vcc,int mode);
  65 void atm_clip_init(void);
  66
  67 #endif