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 ICMP module.
8 *
9 * Version: @(#)icmp.h 1.0.4 05/13/93
10 *
11 * Authors: Ross Biro
12 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
13 */
14#ifndef _ICMP_H
15#define _ICMP_H
16
17#include <linux/icmp.h>
18
19#include <net/inet_sock.h>
20#include <net/snmp.h>
21#include <net/ip.h>
22
23struct icmp_err {
24 int errno;
25 unsigned int fatal:1;
26};
27
28extern const struct icmp_err icmp_err_convert[];
29#define ICMP_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.icmp_statistics, field)
30#define __ICMP_INC_STATS(net, field) __SNMP_INC_STATS((net)->mib.icmp_statistics, field)
31#define ICMPMSGOUT_INC_STATS(net, field) SNMP_INC_STATS_ATOMIC_LONG((net)->mib.icmpmsg_statistics, field+256)
32#define ICMPMSGIN_INC_STATS(net, field) SNMP_INC_STATS_ATOMIC_LONG((net)->mib.icmpmsg_statistics, field)
33
34struct dst_entry;
35struct net_proto_family;
36struct sk_buff;
37struct net;
38
39void __icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info,
40 const struct inet_skb_parm *parm);
41static inline void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
42{
43 __icmp_send(skb_in, type, code, info, IPCB(skb_in));
44}
45
46#if IS_ENABLED(CONFIG_NF_NAT)
47void icmp_ndo_send(struct sk_buff *skb_in, int type, int code, __be32 info);
48#else
49static inline void icmp_ndo_send(struct sk_buff *skb_in, int type, int code, __be32 info)
50{
51 struct inet_skb_parm parm;
52
53 memset(&parm, 0, sizeof(parm));
54 __icmp_send(skb_in, type, code, info, &parm);
55}
56#endif
57
58int icmp_rcv(struct sk_buff *skb);
59int icmp_err(struct sk_buff *skb, u32 info);
60int icmp_init(void);
61void icmp_out_count(struct net *net, unsigned char type);
62bool icmp_build_probe(struct sk_buff *skb, struct icmphdr *icmphdr);
63
64#endif /* _ICMP_H */
65