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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 _LINUX_ICMP_H
18#define _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;
Al Viro9981a0e2006-11-14 21:24:30 -080071 __sum16 checksum;
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 union {
73 struct {
Al Virob1dd39a2006-09-27 18:38:13 -070074 __be16 id;
75 __be16 sequence;
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 } echo;
Al Virob1dd39a2006-09-27 18:38:13 -070077 __be32 gateway;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 struct {
Al Virob1dd39a2006-09-27 18:38:13 -070079 __be16 __unused;
80 __be16 mtu;
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 } frag;
82 } un;
83};
84
85/*
86 * constants for (set|get)sockopt
87 */
88
89#define ICMP_FILTER 1
90
91struct icmp_filter {
92 __u32 data;
93};
94
95
96#endif /* _LINUX_ICMP_H */