1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 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 protocol. 8 * 9 * Version: @(#)icmp.h 1.0.3 04/28/93 10 * 11 * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 12 * 13 * This program is free software; you can redistribute it and/or 14 * modify it under the terms of the GNU General Public License 15 * as published by the Free Software Foundation; either version 16 * 2 of the License, or (at your option) any later version. 17 */ 18 #ifndef _UAPI_LINUX_ICMP_H 19 #define _UAPI_LINUX_ICMP_H 20 21 #include <linux/types.h> 22 23 #define ICMP_ECHOREPLY 0 /* Echo Reply */ 24 #define ICMP_DEST_UNREACH 3 /* Destination Unreachable */ 25 #define ICMP_SOURCE_QUENCH 4 /* Source Quench */ 26 #define ICMP_REDIRECT 5 /* Redirect (change route) */ 27 #define ICMP_ECHO 8 /* Echo Request */ 28 #define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */ 29 #define ICMP_PARAMETERPROB 12 /* Parameter Problem */ 30 #define ICMP_TIMESTAMP 13 /* Timestamp Request */ 31 #define ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */ 32 #define ICMP_INFO_REQUEST 15 /* Information Request */ 33 #define ICMP_INFO_REPLY 16 /* Information Reply */ 34 #define ICMP_ADDRESS 17 /* Address Mask Request */ 35 #define ICMP_ADDRESSREPLY 18 /* Address Mask Reply */ 36 #define NR_ICMP_TYPES 18 37 38 39 /* Codes for UNREACH. */ 40 #define ICMP_NET_UNREACH 0 /* Network Unreachable */ 41 #define ICMP_HOST_UNREACH 1 /* Host Unreachable */ 42 #define ICMP_PROT_UNREACH 2 /* Protocol Unreachable */ 43 #define ICMP_PORT_UNREACH 3 /* Port Unreachable */ 44 #define ICMP_FRAG_NEEDED 4 /* Fragmentation Needed/DF set */ 45 #define ICMP_SR_FAILED 5 /* Source Route failed */ 46 #define ICMP_NET_UNKNOWN 6 47 #define ICMP_HOST_UNKNOWN 7 48 #define ICMP_HOST_ISOLATED 8 49 #define ICMP_NET_ANO 9 50 #define ICMP_HOST_ANO 10 51 #define ICMP_NET_UNR_TOS 11 52 #define ICMP_HOST_UNR_TOS 12 53 #define ICMP_PKT_FILTERED 13 /* Packet filtered */ 54 #define ICMP_PREC_VIOLATION 14 /* Precedence violation */ 55 #define ICMP_PREC_CUTOFF 15 /* Precedence cut off */ 56 #define NR_ICMP_UNREACH 15 /* instead of hardcoding immediate value */ 57 58 /* Codes for REDIRECT. */ 59 #define ICMP_REDIR_NET 0 /* Redirect Net */ 60 #define ICMP_REDIR_HOST 1 /* Redirect Host */ 61 #define ICMP_REDIR_NETTOS 2 /* Redirect Net for TOS */ 62 #define ICMP_REDIR_HOSTTOS 3 /* Redirect Host for TOS */ 63 64 /* Codes for TIME_EXCEEDED. */ 65 #define ICMP_EXC_TTL 0 /* TTL count exceeded */ 66 #define ICMP_EXC_FRAGTIME 1 /* Fragment Reass time exceeded */ 67 68 69 struct icmphdr { 70 __u8 type; 71 __u8 code; 72 __sum16 checksum; 73 union { 74 struct { 75 __be16 id; 76 __be16 sequence; 77 } echo; 78 __be32 gateway; 79 struct { 80 __be16 __unused; 81 __be16 mtu; 82 } frag; 83 __u8 reserved[4]; 84 } un; 85 }; 86 87 88 /* 89 * constants for (set|get)sockopt 90 */ 91 92 #define ICMP_FILTER 1 93 94 struct icmp_filter { 95 __u32 data; 96 }; 97 98 99 #endif /* _UAPI_LINUX_ICMP_H */ 100