inetpeer.h 1.4 KB

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  1. /*
  2. * INETPEER - A storage for permanent information about peers
  3. *
  4. * Version: $Id: inetpeer.h,v 1.1.1.1 2007/06/12 07:27:16 eyryu Exp $
  5. *
  6. * Authors: Andrey V. Savochkin <saw@msu.ru>
  7. */
  8. #ifndef _NET_INETPEER_H
  9. #define _NET_INETPEER_H
  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. struct inet_peer
  16. {
  17. /* group together avl_left,avl_right,v4daddr to speedup lookups */
  18. struct inet_peer *avl_left, *avl_right;
  19. __be32 v4daddr; /* peer's address */
  20. __u16 avl_height;
  21. __u16 ip_id_count; /* IP ID for the next packet */
  22. struct inet_peer *unused_next, **unused_prevp;
  23. __u32 dtime; /* the time of last use of not
  24. * referenced entries */
  25. atomic_t refcnt;
  26. atomic_t rid; /* Frag reception counter */
  27. __u32 tcp_ts;
  28. unsigned long tcp_ts_stamp;
  29. };
  30. void inet_initpeers(void) __init;
  31. /* can be called with or without local BH being disabled */
  32. struct inet_peer *inet_getpeer(__be32 daddr, int create);
  33. /* can be called from BH context or outside */
  34. extern void inet_putpeer(struct inet_peer *p);
  35. extern spinlock_t inet_peer_idlock;
  36. /* can be called with or without local BH being disabled */
  37. static inline __u16 inet_getid(struct inet_peer *p, int more)
  38. {
  39. __u16 id;
  40. spin_lock_bh(&inet_peer_idlock);
  41. id = p->ip_id_count;
  42. p->ip_id_count += 1 + more;
  43. spin_unlock_bh(&inet_peer_idlock);
  44. return id;
  45. }
  46. #endif /* _NET_INETPEER_H */