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 { 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 list_head unused; 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 34 void inet_initpeers(void) __init; 35 36 /* can be called with or without local BH being disabled */ 37 struct inet_peer *inet_getpeer(__be32 daddr, int create); 38 39 /* can be called from BH context or outside */ 40 extern void inet_putpeer(struct inet_peer *p); 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 */ 56