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1da177e4 LT |
1 | /* |
2 | * INETPEER - A storage for permanent information about peers | |
3 | * | |
1da177e4 LT |
4 | * Authors: Andrey V. Savochkin <saw@msu.ru> |
5 | */ | |
6 | ||
7 | #ifndef _NET_INETPEER_H | |
8 | #define _NET_INETPEER_H | |
9 | ||
10 | #include <linux/types.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/jiffies.h> | |
13 | #include <linux/spinlock.h> | |
14 | #include <asm/atomic.h> | |
15 | ||
fd2c3ef7 | 16 | struct inet_peer { |
78d79423 | 17 | /* group together avl_left,avl_right,v4daddr to speedup lookups */ |
1da177e4 | 18 | struct inet_peer *avl_left, *avl_right; |
78d79423 ED |
19 | __be32 v4daddr; /* peer's address */ |
20 | __u16 avl_height; | |
21 | __u16 ip_id_count; /* IP ID for the next packet */ | |
d71209de | 22 | struct list_head unused; |
4663afe2 | 23 | __u32 dtime; /* the time of last use of not |
1da177e4 LT |
24 | * referenced entries */ |
25 | atomic_t refcnt; | |
89cee8b1 | 26 | atomic_t rid; /* Frag reception counter */ |
1da177e4 LT |
27 | __u32 tcp_ts; |
28 | unsigned long tcp_ts_stamp; | |
29 | }; | |
30 | ||
31 | void inet_initpeers(void) __init; | |
32 | ||
33 | /* can be called with or without local BH being disabled */ | |
53576d9b | 34 | struct inet_peer *inet_getpeer(__be32 daddr, int create); |
1da177e4 | 35 | |
1da177e4 | 36 | /* can be called from BH context or outside */ |
4663afe2 | 37 | extern void inet_putpeer(struct inet_peer *p); |
1da177e4 LT |
38 | |
39 | extern spinlock_t inet_peer_idlock; | |
40 | /* can be called with or without local BH being disabled */ | |
41 | static inline __u16 inet_getid(struct inet_peer *p, int more) | |
42 | { | |
43 | __u16 id; | |
44 | ||
45 | spin_lock_bh(&inet_peer_idlock); | |
46 | id = p->ip_id_count; | |
47 | p->ip_id_count += 1 + more; | |
48 | spin_unlock_bh(&inet_peer_idlock); | |
49 | return id; | |
50 | } | |
51 | ||
52 | #endif /* _NET_INETPEER_H */ |