LXR linux/include/net/ping.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * INET         An implementation of the TCP/IP protocol suite for the LINUX
   4 *              operating system.  INET is implemented using the  BSD Socket
   5 *              interface as the means of communication with the user level.
   6 *
   7 *              Definitions for the "ping" module.
   8 */
   9#ifndef _PING_H
  10#define _PING_H
  11
  12#include <net/icmp.h>
  13#include <net/netns/hash.h>
  14
  15/* PING_HTABLE_SIZE must be power of 2 */
  16#define PING_HTABLE_SIZE        64
  17#define PING_HTABLE_MASK        (PING_HTABLE_SIZE-1)
  18
  19#define ping_portaddr_for_each_entry(__sk, node, list) \
  20        hlist_nulls_for_each_entry(__sk, node, list, sk_nulls_node)
  21
  22/*
  23 * gid_t is either uint or ushort.  We want to pass it to
  24 * proc_dointvec_minmax(), so it must not be larger than MAX_INT
  25 */
  26#define GID_T_MAX (((gid_t)~0U) >> 1)
  27
  28/* Compatibility glue so we can support IPv6 when it's compiled as a module */
  29struct pingv6_ops {
  30        int (*ipv6_recv_error)(struct sock *sk, struct msghdr *msg, int len,
  31                               int *addr_len);
  32        void (*ip6_datagram_recv_common_ctl)(struct sock *sk,
  33                                             struct msghdr *msg,
  34                                             struct sk_buff *skb);
  35        void (*ip6_datagram_recv_specific_ctl)(struct sock *sk,
  36                                               struct msghdr *msg,
  37                                               struct sk_buff *skb);
  38        int (*icmpv6_err_convert)(u8 type, u8 code, int *err);
  39        void (*ipv6_icmp_error)(struct sock *sk, struct sk_buff *skb, int err,
  40                                __be16 port, u32 info, u8 *payload);
  41        int (*ipv6_chk_addr)(struct net *net, const struct in6_addr *addr,
  42                             const struct net_device *dev, int strict);
  43};
  44
  45struct ping_iter_state {
  46        struct seq_net_private  p;
  47        int                     bucket;
  48        sa_family_t             family;
  49};
  50
  51extern struct proto ping_prot;
  52#if IS_ENABLED(CONFIG_IPV6)
  53extern struct pingv6_ops pingv6_ops;
  54#endif
  55
  56struct pingfakehdr {
  57        struct icmphdr icmph;
  58        struct msghdr *msg;
  59        sa_family_t family;
  60        __wsum wcheck;
  61};
  62
  63int  ping_get_port(struct sock *sk, unsigned short ident);
  64int ping_hash(struct sock *sk);
  65void ping_unhash(struct sock *sk);
  66
  67int  ping_init_sock(struct sock *sk);
  68void ping_close(struct sock *sk, long timeout);
  69int  ping_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len);
  70void ping_err(struct sk_buff *skb, int offset, u32 info);
  71int  ping_getfrag(void *from, char *to, int offset, int fraglen, int odd,
  72                  struct sk_buff *);
  73
  74int  ping_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int noblock,
  75                  int flags, int *addr_len);
  76int  ping_common_sendmsg(int family, struct msghdr *msg, size_t len,
  77                         void *user_icmph, size_t icmph_len);
  78int  ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
  79bool ping_rcv(struct sk_buff *skb);
  80
  81#ifdef CONFIG_PROC_FS
  82void *ping_seq_start(struct seq_file *seq, loff_t *pos, sa_family_t family);
  83void *ping_seq_next(struct seq_file *seq, void *v, loff_t *pos);
  84void ping_seq_stop(struct seq_file *seq, void *v);
  85
  86int __init ping_proc_init(void);
  87void ping_proc_exit(void);
  88#endif
  89
  90void __init ping_init(void);
  91int  __init pingv6_init(void);
  92void pingv6_exit(void);
  93
  94#endif /* _PING_H */
  95