include/net/ping.h

   1 /*
   2  * INET         An implementation of the TCP/IP protocol suite for the LINUX
   3  *              operating system.  INET is implemented using the  BSD Socket
   4  *              interface as the means of communication with the user level.
   5  *
   6  *              Definitions for the "ping" module.
   7  *
   8  *              This program is free software; you can redistribute it and/or
   9  *              modify it under the terms of the GNU General Public License
  10  *              as published by the Free Software Foundation; either version
  11  *              2 of the License, or (at your option) any later version.
  12  */
  13 #ifndef _PING_H
  14 #define _PING_H
  15
  16 #include <net/netns/hash.h>
  17
  18 /* PING_HTABLE_SIZE must be power of 2 */
  19 #define PING_HTABLE_SIZE        64
  20 #define PING_HTABLE_MASK        (PING_HTABLE_SIZE-1)
  21
  22 #define ping_portaddr_for_each_entry(__sk, node, list) \
  23         hlist_nulls_for_each_entry(__sk, node, list, sk_nulls_node)
  24
  25 /*
  26  * gid_t is either uint or ushort.  We want to pass it to
  27  * proc_dointvec_minmax(), so it must not be larger than MAX_INT
  28  */
  29 #define GID_T_MAX (((gid_t)~0U) >> 1)
  30
  31 struct ping_table {
  32         struct hlist_nulls_head hash[PING_HTABLE_SIZE];
  33         rwlock_t                lock;
  34 };
  35
  36 struct ping_iter_state {
  37         struct seq_net_private  p;
  38         int                     bucket;
  39 };
  40
  41 extern struct proto ping_prot;
  42
  43
  44 extern void ping_rcv(struct sk_buff *);
  45 extern void ping_err(struct sk_buff *, u32 info);
  46
  47 #ifdef CONFIG_PROC_FS
  48 extern int __init ping_proc_init(void);
  49 extern void ping_proc_exit(void);
  50 #endif
  51
  52 void __init ping_init(void);
  53
  54
  55 #endif /* _PING_H */