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/icmp.h>
  17#include <net/netns/hash.h>
  18
  19/* PING_HTABLE_SIZE must be power of 2 */
  20#define PING_HTABLE_SIZE        64
  21#define PING_HTABLE_MASK        (PING_HTABLE_SIZE-1)
  22
  23#define ping_portaddr_for_each_entry(__sk, node, list) \
  24        hlist_nulls_for_each_entry(__sk, node, list, sk_nulls_node)
  25
  26/*
  27 * gid_t is either uint or ushort.  We want to pass it to
  28 * proc_dointvec_minmax(), so it must not be larger than MAX_INT
  29 */
  30#define GID_T_MAX (((gid_t)~0U) >> 1)
  31
  32/* Compatibility glue so we can support IPv6 when it's compiled as a module */
  33struct pingv6_ops {
  34        int (*ipv6_recv_error)(struct sock *sk, struct msghdr *msg, int len,
  35                               int *addr_len);
  36        void (*ip6_datagram_recv_common_ctl)(struct sock *sk,
  37                                             struct msghdr *msg,
  38                                             struct sk_buff *skb);
  39        void (*ip6_datagram_recv_specific_ctl)(struct sock *sk,
  40                                               struct msghdr *msg,
  41                                               struct sk_buff *skb);
  42        int (*icmpv6_err_convert)(u8 type, u8 code, int *err);
  43        void (*ipv6_icmp_error)(struct sock *sk, struct sk_buff *skb, int err,
  44                                __be16 port, u32 info, u8 *payload);
  45        int (*ipv6_chk_addr)(struct net *net, const struct in6_addr *addr,
  46                             const struct net_device *dev, int strict);
  47};
  48
  49struct ping_iter_state {
  50        struct seq_net_private  p;
  51        int                     bucket;
  52        sa_family_t             family;
  53};
  54
  55extern struct proto ping_prot;
  56#if IS_ENABLED(CONFIG_IPV6)
  57extern struct pingv6_ops pingv6_ops;
  58#endif
  59
  60struct pingfakehdr {
  61        struct icmphdr icmph;
  62        struct msghdr *msg;
  63        sa_family_t family;
  64        __wsum wcheck;
  65};
  66
  67int  ping_get_port(struct sock *sk, unsigned short ident);
  68void ping_hash(struct sock *sk);
  69void ping_unhash(struct sock *sk);
  70
  71int  ping_init_sock(struct sock *sk);
  72void ping_close(struct sock *sk, long timeout);
  73int  ping_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len);
  74void ping_err(struct sk_buff *skb, int offset, u32 info);
  75int  ping_getfrag(void *from, char *to, int offset, int fraglen, int odd,
  76                  struct sk_buff *);
  77
  78int  ping_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
  79                  size_t len, int noblock, int flags, int *addr_len);
  80int  ping_common_sendmsg(int family, struct msghdr *msg, size_t len,
  81                         void *user_icmph, size_t icmph_len);
  82int  ping_v6_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
  83                     size_t len);
  84int  ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
  85bool ping_rcv(struct sk_buff *skb);
  86
  87#ifdef CONFIG_PROC_FS
  88struct ping_seq_afinfo {
  89        char                            *name;
  90        sa_family_t                     family;
  91        const struct file_operations    *seq_fops;
  92        const struct seq_operations     seq_ops;
  93};
  94
  95extern const struct file_operations ping_seq_fops;
  96
  97void *ping_seq_start(struct seq_file *seq, loff_t *pos, sa_family_t family);
  98void *ping_seq_next(struct seq_file *seq, void *v, loff_t *pos);
  99void ping_seq_stop(struct seq_file *seq, void *v);
 100int ping_proc_register(struct net *net, struct ping_seq_afinfo *afinfo);
 101void ping_proc_unregister(struct net *net, struct ping_seq_afinfo *afinfo);
 102
 103int __init ping_proc_init(void);
 104void ping_proc_exit(void);
 105#endif
 106
 107void __init ping_init(void);
 108int  __init pingv6_init(void);
 109void pingv6_exit(void);
 110
 111#endif /* _PING_H */
 112