projects/linux·blob v2.6.21 · refs

55 lines · 1.4 KiB

1/*
2 * INETPEER - A storage for permanent information about peers
3 *
4 * Version: $Id: inetpeer.h,v 1.2 2002/01/12 07:54:56 davem Exp $
5 *
6 * Authors: Andrey V. Savochkin <[email protected]>
7 */
8
9#ifndef _NET_INETPEER_H
10#define _NET_INETPEER_H
11
12#include <linux/types.h>
13#include <linux/init.h>
14#include <linux/jiffies.h>
15#include <linux/spinlock.h>
16#include <asm/atomic.h>
17
18struct inet_peer
19{
20 /* group together avl_left,avl_right,v4daddr to speedup lookups */
21 struct inet_peer *avl_left, *avl_right;
22 __be32 v4daddr; /* peer's address */
23 __u16 avl_height;
24 __u16 ip_id_count; /* IP ID for the next packet */
25 struct inet_peer *unused_next, **unused_prevp;
26 __u32 dtime; /* the time of last use of not
27 * referenced entries */
28 atomic_t refcnt;
29 atomic_t rid; /* Frag reception counter */
30 __u32 tcp_ts;
31 unsigned long tcp_ts_stamp;
32};
33
34void inet_initpeers(void) __init;
35
36/* can be called with or without local BH being disabled */
37struct inet_peer *inet_getpeer(__be32 daddr, int create);
38
39/* can be called from BH context or outside */
40extern void inet_putpeer(struct inet_peer *p);
41
42extern spinlock_t inet_peer_idlock;
43/* can be called with or without local BH being disabled */
44static inline __u16 inet_getid(struct inet_peer *p, int more)
45{
46 __u16 id;
47
48 spin_lock_bh(&inet_peer_idlock);
49 id = p->ip_id_count;
50 p->ip_id_count += 1 + more;
51 spin_unlock_bh(&inet_peer_idlock);
52 return id;
53}
54
55#endif /* _NET_INETPEER_H */