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 ICMP protocol.
7 *
8 * Version:	@(#)icmp.h	1.0.3	04/28/93
9 *
10 * Author:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
11 *
12 *		This program is free software; you can redistribute it and/or
13 *		modify it under the terms of the GNU General Public License
14 *		as published by the Free Software Foundation; either version
15 *		2 of the License, or (at your option) any later version.
16 */
17#ifndef _UAPI_LINUX_ICMP_H
18#define _UAPI_LINUX_ICMP_H
19
20#include <linux/types.h>
21
22#define ICMP_ECHOREPLY		0	/* Echo Reply			*/
23#define ICMP_DEST_UNREACH	3	/* Destination Unreachable	*/
24#define ICMP_SOURCE_QUENCH	4	/* Source Quench		*/
25#define ICMP_REDIRECT		5	/* Redirect (change route)	*/
26#define ICMP_ECHO		8	/* Echo Request			*/
27#define ICMP_TIME_EXCEEDED	11	/* Time Exceeded		*/
28#define ICMP_PARAMETERPROB	12	/* Parameter Problem		*/
29#define ICMP_TIMESTAMP		13	/* Timestamp Request		*/
30#define ICMP_TIMESTAMPREPLY	14	/* Timestamp Reply		*/
31#define ICMP_INFO_REQUEST	15	/* Information Request		*/
32#define ICMP_INFO_REPLY		16	/* Information Reply		*/
33#define ICMP_ADDRESS		17	/* Address Mask Request		*/
34#define ICMP_ADDRESSREPLY	18	/* Address Mask Reply		*/
35#define NR_ICMP_TYPES		18
36
37
38/* Codes for UNREACH. */
39#define ICMP_NET_UNREACH	0	/* Network Unreachable		*/
40#define ICMP_HOST_UNREACH	1	/* Host Unreachable		*/
41#define ICMP_PROT_UNREACH	2	/* Protocol Unreachable		*/
42#define ICMP_PORT_UNREACH	3	/* Port Unreachable		*/
43#define ICMP_FRAG_NEEDED	4	/* Fragmentation Needed/DF set	*/
44#define ICMP_SR_FAILED		5	/* Source Route failed		*/
45#define ICMP_NET_UNKNOWN	6
46#define ICMP_HOST_UNKNOWN	7
47#define ICMP_HOST_ISOLATED	8
48#define ICMP_NET_ANO		9
49#define ICMP_HOST_ANO		10
50#define ICMP_NET_UNR_TOS	11
51#define ICMP_HOST_UNR_TOS	12
52#define ICMP_PKT_FILTERED	13	/* Packet filtered */
53#define ICMP_PREC_VIOLATION	14	/* Precedence violation */
54#define ICMP_PREC_CUTOFF	15	/* Precedence cut off */
55#define NR_ICMP_UNREACH		15	/* instead of hardcoding immediate value */
56
57/* Codes for REDIRECT. */
58#define ICMP_REDIR_NET		0	/* Redirect Net			*/
59#define ICMP_REDIR_HOST		1	/* Redirect Host		*/
60#define ICMP_REDIR_NETTOS	2	/* Redirect Net for TOS		*/
61#define ICMP_REDIR_HOSTTOS	3	/* Redirect Host for TOS	*/
62
63/* Codes for TIME_EXCEEDED. */
64#define ICMP_EXC_TTL		0	/* TTL count exceeded		*/
65#define ICMP_EXC_FRAGTIME	1	/* Fragment Reass time exceeded	*/
66
67
68struct icmphdr {
69  __u8		type;
70  __u8		code;
71  __sum16	checksum;
72  union {
73	struct {
74		__be16	id;
75		__be16	sequence;
76	} echo;
77	__be32	gateway;
78	struct {
79		__be16	__unused;
80		__be16	mtu;
81	} frag;
82  } un;
83};
84
85
86/*
87 *	constants for (set|get)sockopt
88 */
89
90#define ICMP_FILTER			1
91
92struct icmp_filter {
93	__u32		data;
94};
95
96
97#endif /* _UAPI_LINUX_ICMP_H */
98