1/* 2 * INETPEER - A storage for permanent information about peers 3 * 4 * Version: $Id: inetpeer.h,v 1.1.1.1 2007/08/03 18:53:45 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 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 */ 56