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 <linux/bug.h>
  16 #include <net/sock.h>
  17
  18 struct timewait_sock_ops {
  19         struct kmem_cache       *twsk_slab;
  20         char            *twsk_slab_name;
  21         unsigned int    twsk_obj_size;
  22         int             (*twsk_unique)(struct sock *sk,
  23                                        struct sock *sktw, void *twp);
  24         void            (*twsk_destructor)(struct sock *sk);
  25         void            *(*twsk_getpeer)(struct sock *sk);
  26 };
  27
  28 static inline int twsk_unique(struct sock *sk, struct sock *sktw, void *twp)
  29 {
  30         if (sk->sk_prot->twsk_prot->twsk_unique != NULL)
  31                 return sk->sk_prot->twsk_prot->twsk_unique(sk, sktw, twp);
  32         return 0;
  33 }
  34
  35 static inline void twsk_destructor(struct sock *sk)
  36 {
  37         BUG_ON(sk == NULL);
  38         BUG_ON(sk->sk_prot == NULL);
  39         BUG_ON(sk->sk_prot->twsk_prot == NULL);
  40         if (sk->sk_prot->twsk_prot->twsk_destructor != NULL)
  41                 sk->sk_prot->twsk_prot->twsk_destructor(sk);
  42 }
  43
  44 static inline void *twsk_getpeer(struct sock *sk)
  45 {
  46         if (sk->sk_prot->twsk_prot->twsk_getpeer)
  47                 return sk->sk_prot->twsk_prot->twsk_getpeer(sk);
  48         return NULL;
  49 }
  50
  51 #endif /* _TIMEWAIT_SOCK_H */