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1da177e4 LT |
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 <saw@msu.ru> | |
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 | ||
18 | struct inet_peer | |
19 | { | |
78d79423 | 20 | /* group together avl_left,avl_right,v4daddr to speedup lookups */ |
1da177e4 | 21 | struct inet_peer *avl_left, *avl_right; |
78d79423 ED |
22 | __be32 v4daddr; /* peer's address */ |
23 | __u16 avl_height; | |
24 | __u16 ip_id_count; /* IP ID for the next packet */ | |
1da177e4 | 25 | struct inet_peer *unused_next, **unused_prevp; |
4663afe2 | 26 | __u32 dtime; /* the time of last use of not |
1da177e4 LT |
27 | * referenced entries */ |
28 | atomic_t refcnt; | |
89cee8b1 | 29 | atomic_t rid; /* Frag reception counter */ |
1da177e4 LT |
30 | __u32 tcp_ts; |
31 | unsigned long tcp_ts_stamp; | |
32 | }; | |
33 | ||
34 | void inet_initpeers(void) __init; | |
35 | ||
36 | /* can be called with or without local BH being disabled */ | |
53576d9b | 37 | struct inet_peer *inet_getpeer(__be32 daddr, int create); |
1da177e4 | 38 | |
1da177e4 | 39 | /* can be called from BH context or outside */ |
4663afe2 | 40 | extern void inet_putpeer(struct inet_peer *p); |
1da177e4 LT |
41 | |
42 | extern spinlock_t inet_peer_idlock; | |
43 | /* can be called with or without local BH being disabled */ | |
44 | static 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 */ |