LXR linux/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
  31struct ping_table {
  32        struct hlist_nulls_head hash[PING_HTABLE_SIZE];
  33        rwlock_t                lock;
  34};
  35
  36struct ping_iter_state {
  37        struct seq_net_private  p;
  38        int                     bucket;
  39};
  40
  41extern struct proto ping_prot;
  42
  43
  44extern void ping_rcv(struct sk_buff *);
  45extern void ping_err(struct sk_buff *, u32 info);
  46
  47#ifdef CONFIG_PROC_FS
  48extern int __init ping_proc_init(void);
  49extern void ping_proc_exit(void);
  50#endif
  51
  52void __init ping_init(void);
  53
  54
  55#endif /* _PING_H */
  56