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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/*
20 * gid_t is either uint or ushort. We want to pass it to
21 * proc_dointvec_minmax(), so it must not be larger than MAX_INT
22 */
23#define GID_T_MAX (((gid_t)~0U) >> 1)
24
25/* Compatibility glue so we can support IPv6 when it's compiled as a module */
26struct pingv6_ops {
27 int (*ipv6_recv_error)(struct sock *sk, struct msghdr *msg, int len,
28 int *addr_len);
29 void (*ip6_datagram_recv_common_ctl)(struct sock *sk,
30 struct msghdr *msg,
31 struct sk_buff *skb);
32 void (*ip6_datagram_recv_specific_ctl)(struct sock *sk,
33 struct msghdr *msg,
34 struct sk_buff *skb);
35 int (*icmpv6_err_convert)(u8 type, u8 code, int *err);
36 void (*ipv6_icmp_error)(struct sock *sk, struct sk_buff *skb, int err,
37 __be16 port, u32 info, u8 *payload);
38 int (*ipv6_chk_addr)(struct net *net, const struct in6_addr *addr,
39 const struct net_device *dev, int strict);
40};
41
42struct ping_iter_state {
43 struct seq_net_private p;
44 int bucket;
45 sa_family_t family;
46};
47
48extern struct proto ping_prot;
49#if IS_ENABLED(CONFIG_IPV6)
50extern struct pingv6_ops pingv6_ops;
51#endif
52
53struct pingfakehdr {
54 struct icmphdr icmph;
55 struct msghdr *msg;
56 sa_family_t family;
57 __wsum wcheck;
58};
59
60int ping_get_port(struct sock *sk, unsigned short ident);
61int ping_hash(struct sock *sk);
62void ping_unhash(struct sock *sk);
63
64int ping_init_sock(struct sock *sk);
65void ping_close(struct sock *sk, long timeout);
66int ping_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len);
67void ping_err(struct sk_buff *skb, int offset, u32 info);
68int ping_getfrag(void *from, char *to, int offset, int fraglen, int odd,
69 struct sk_buff *);
70
71int ping_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
72 int flags, int *addr_len);
73int ping_common_sendmsg(int family, struct msghdr *msg, size_t len,
74 void *user_icmph, size_t icmph_len);
75int ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
76enum skb_drop_reason ping_rcv(struct sk_buff *skb);
77
78#ifdef CONFIG_PROC_FS
79void *ping_seq_start(struct seq_file *seq, loff_t *pos, sa_family_t family);
80void *ping_seq_next(struct seq_file *seq, void *v, loff_t *pos);
81void ping_seq_stop(struct seq_file *seq, void *v);
82
83int __init ping_proc_init(void);
84void ping_proc_exit(void);
85#endif
86
87void __init ping_init(void);
88int __init pingv6_init(void);
89void pingv6_exit(void);
90
91#endif /* _PING_H */