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 iovec *iov;
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);
85void 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