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 GID_T_MAX (((gid_t)~0U) - 1)
20
21/* Compatibility glue so we can support IPv6 when it's compiled as a module */
22struct pingv6_ops {
23	int (*ipv6_recv_error)(struct sock *sk, struct msghdr *msg, int len,
24			       int *addr_len);
25	void (*ip6_datagram_recv_common_ctl)(struct sock *sk,
26					     struct msghdr *msg,
27					     struct sk_buff *skb);
28	void (*ip6_datagram_recv_specific_ctl)(struct sock *sk,
29					       struct msghdr *msg,
30					       struct sk_buff *skb);
31	int (*icmpv6_err_convert)(u8 type, u8 code, int *err);
32	void (*ipv6_icmp_error)(struct sock *sk, struct sk_buff *skb, int err,
33				__be16 port, u32 info, u8 *payload);
34	int (*ipv6_chk_addr)(struct net *net, const struct in6_addr *addr,
35			     const struct net_device *dev, int strict);
36};
37
38struct ping_iter_state {
39	struct seq_net_private  p;
40	int			bucket;
41	sa_family_t		family;
42};
43
44extern struct proto ping_prot;
45#if IS_ENABLED(CONFIG_IPV6)
46extern struct pingv6_ops pingv6_ops;
47#endif
48
49struct pingfakehdr {
50	struct icmphdr icmph;
51	struct msghdr *msg;
52	sa_family_t family;
53	__wsum wcheck;
54};
55
56int  ping_get_port(struct sock *sk, unsigned short ident);
57int ping_hash(struct sock *sk);
58void ping_unhash(struct sock *sk);
59
60int  ping_init_sock(struct sock *sk);
61void ping_close(struct sock *sk, long timeout);
62int  ping_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len);
63void ping_err(struct sk_buff *skb, int offset, u32 info);
64int  ping_getfrag(void *from, char *to, int offset, int fraglen, int odd,
65		  struct sk_buff *);
66
67int  ping_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
68		  int flags, int *addr_len);
69int  ping_common_sendmsg(int family, struct msghdr *msg, size_t len,
70			 void *user_icmph, size_t icmph_len);
71int  ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
72enum skb_drop_reason ping_rcv(struct sk_buff *skb);
73
74#ifdef CONFIG_PROC_FS
75void *ping_seq_start(struct seq_file *seq, loff_t *pos, sa_family_t family);
76void *ping_seq_next(struct seq_file *seq, void *v, loff_t *pos);
77void ping_seq_stop(struct seq_file *seq, void *v);
78
79int __init ping_proc_init(void);
80void ping_proc_exit(void);
81#endif
82
83void __init ping_init(void);
84int  __init pingv6_init(void);
85void pingv6_exit(void);
86
87#endif /* _PING_H */
88