include/net/timewait_sock.h

   1 /*
   2  * NET          Generic infrastructure for Network protocols.
   3  *
   4  * Authors:     Arnaldo Carvalho de Melo <acme@conectiva.com.br>
   5  *
   6  *              This program is free software; you can redistribute it and/or
   7  *              modify it under the terms of the GNU General Public License
   8  *              as published by the Free Software Foundation; either version
   9  *              2 of the License, or (at your option) any later version.
  10  */
  11 #ifndef _TIMEWAIT_SOCK_H
  12 #define _TIMEWAIT_SOCK_H
  13
  14 #include <linux/slab.h>
  15 #include <net/sock.h>
  16
  17 struct timewait_sock_ops {
  18         struct kmem_cache       *twsk_slab;
  19         char            *twsk_slab_name;
  20         unsigned int    twsk_obj_size;
  21         int             (*twsk_unique)(struct sock *sk,
  22                                        struct sock *sktw, void *twp);
  23         void            (*twsk_destructor)(struct sock *sk);
  24         void            *(*twsk_getpeer)(struct sock *sk);
  25 };
  26
  27 static inline int twsk_unique(struct sock *sk, struct sock *sktw, void *twp)
  28 {
  29         if (sk->sk_prot->twsk_prot->twsk_unique != NULL)
  30                 return sk->sk_prot->twsk_prot->twsk_unique(sk, sktw, twp);
  31         return 0;
  32 }
  33
  34 static inline void twsk_destructor(struct sock *sk)
  35 {
  36         BUG_ON(sk == NULL);
  37         BUG_ON(sk->sk_prot == NULL);
  38         BUG_ON(sk->sk_prot->twsk_prot == NULL);
  39         if (sk->sk_prot->twsk_prot->twsk_destructor != NULL)
  40                 sk->sk_prot->twsk_prot->twsk_destructor(sk);
  41 }
  42
  43 static inline void *twsk_getpeer(struct sock *sk)
  44 {
  45         if (sk->sk_prot->twsk_prot->twsk_getpeer)
  46                 return sk->sk_prot->twsk_prot->twsk_getpeer(sk);
  47         return NULL;
  48 }
  49
  50 #endif /* _TIMEWAIT_SOCK_H */