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icmp.h
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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, <[email protected]>
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 
68 struct icmphdr {
72  union {
73  struct {
76  } echo;
78  struct {
81  } frag;
82  } un;
83 };
84 
85 
86 /*
87  * constants for (set|get)sockopt
88  */
89 
90 #define ICMP_FILTER 1
91 
92 struct icmp_filter {
94 };
95 
96 
97 #endif /* _UAPI_LINUX_ICMP_H */