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 #include <asm/byteorder.h> 23 #include <linux/if.h> 24 #include <linux/in6.h> 25 26 #define ICMP_ECHOREPLY 0 /* Echo Reply */ 27 #define ICMP_DEST_UNREACH 3 /* Destination Unreachable */ 28 #define ICMP_SOURCE_QUENCH 4 /* Source Quench */ 29 #define ICMP_REDIRECT 5 /* Redirect (change route) */ 30 #define ICMP_ECHO 8 /* Echo Request */ 31 #define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */ 32 #define ICMP_PARAMETERPROB 12 /* Parameter Problem */ 33 #define ICMP_TIMESTAMP 13 /* Timestamp Request */ 34 #define ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */ 35 #define ICMP_INFO_REQUEST 15 /* Information Request */ 36 #define ICMP_INFO_REPLY 16 /* Information Reply */ 37 #define ICMP_ADDRESS 17 /* Address Mask Request */ 38 #define ICMP_ADDRESSREPLY 18 /* Address Mask Reply */ 39 #define NR_ICMP_TYPES 18 40 41 42 /* Codes for UNREACH. */ 43 #define ICMP_NET_UNREACH 0 /* Network Unreachable */ 44 #define ICMP_HOST_UNREACH 1 /* Host Unreachable */ 45 #define ICMP_PROT_UNREACH 2 /* Protocol Unreachable */ 46 #define ICMP_PORT_UNREACH 3 /* Port Unreachable */ 47 #define ICMP_FRAG_NEEDED 4 /* Fragmentation Needed/DF set */ 48 #define ICMP_SR_FAILED 5 /* Source Route failed */ 49 #define ICMP_NET_UNKNOWN 6 50 #define ICMP_HOST_UNKNOWN 7 51 #define ICMP_HOST_ISOLATED 8 52 #define ICMP_NET_ANO 9 53 #define ICMP_HOST_ANO 10 54 #define ICMP_NET_UNR_TOS 11 55 #define ICMP_HOST_UNR_TOS 12 56 #define ICMP_PKT_FILTERED 13 /* Packet filtered */ 57 #define ICMP_PREC_VIOLATION 14 /* Precedence violation */ 58 #define ICMP_PREC_CUTOFF 15 /* Precedence cut off */ 59 #define NR_ICMP_UNREACH 15 /* instead of hardcoding immediate value */ 60 61 /* Codes for REDIRECT. */ 62 #define ICMP_REDIR_NET 0 /* Redirect Net */ 63 #define ICMP_REDIR_HOST 1 /* Redirect Host */ 64 #define ICMP_REDIR_NETTOS 2 /* Redirect Net for TOS */ 65 #define ICMP_REDIR_HOSTTOS 3 /* Redirect Host for TOS */ 66 67 /* Codes for TIME_EXCEEDED. */ 68 #define ICMP_EXC_TTL 0 /* TTL count exceeded */ 69 #define ICMP_EXC_FRAGTIME 1 /* Fragment Reass time exceeded */ 70 71 /* Codes for EXT_ECHO (PROBE) */ 72 #define ICMP_EXT_ECHO 42 73 #define ICMP_EXT_ECHOREPLY 43 74 #define ICMP_EXT_CODE_MAL_QUERY 1 /* Malformed Query */ 75 #define ICMP_EXT_CODE_NO_IF 2 /* No such Interface */ 76 #define ICMP_EXT_CODE_NO_TABLE_ENT 3 /* No such Table Entry */ 77 #define ICMP_EXT_CODE_MULT_IFS 4 /* Multiple Interfaces Satisfy Query */ 78 79 /* Constants for EXT_ECHO (PROBE) */ 80 #define ICMP_EXT_ECHOREPLY_ACTIVE (1 << 2)/* active bit in reply message */ 81 #define ICMP_EXT_ECHOREPLY_IPV4 (1 << 1)/* ipv4 bit in reply message */ 82 #define ICMP_EXT_ECHOREPLY_IPV6 1 /* ipv6 bit in reply message */ 83 #define ICMP_EXT_ECHO_CTYPE_NAME 1 84 #define ICMP_EXT_ECHO_CTYPE_INDEX 2 85 #define ICMP_EXT_ECHO_CTYPE_ADDR 3 86 #define ICMP_AFI_IP 1 /* Address Family Identifier for ipv4 */ 87 #define ICMP_AFI_IP6 2 /* Address Family Identifier for ipv6 */ 88 89 struct icmphdr { 90 __u8 type; 91 __u8 code; 92 __sum16 checksum; 93 union { 94 struct { 95 __be16 id; 96 __be16 sequence; 97 } echo; 98 __be32 gateway; 99 struct { 100 #ifdef __BIONIC__ 101 __be16 __linux_unused; 102 #else 103 __be16 __unused; 104 #endif 105 __be16 mtu; 106 } frag; 107 __u8 reserved[4]; 108 } un; 109 }; 110 111 112 /* 113 * constants for (set|get)sockopt 114 */ 115 116 #define ICMP_FILTER 1 117 118 struct icmp_filter { 119 __u32 data; 120 }; 121 122 /* RFC 4884 extension struct: one per message */ 123 struct icmp_ext_hdr { 124 #if defined(__LITTLE_ENDIAN_BITFIELD) 125 __u8 reserved1:4, 126 version:4; 127 #elif defined(__BIG_ENDIAN_BITFIELD) 128 __u8 version:4, 129 reserved1:4; 130 #else 131 #error "Please fix <asm/byteorder.h>" 132 #endif 133 __u8 reserved2; 134 __sum16 checksum; 135 }; 136 137 /* RFC 4884 extension object header: one for each object */ 138 struct icmp_extobj_hdr { 139 __be16 length; 140 __u8 class_num; 141 __u8 class_type; 142 }; 143 144 /* RFC 8335: 2.1 Header for c-type 3 payload */ 145 struct icmp_ext_echo_ctype3_hdr { 146 __be16 afi; 147 __u8 addrlen; 148 __u8 reserved; 149 }; 150 151 /* RFC 8335: 2.1 Interface Identification Object */ 152 struct icmp_ext_echo_iio { 153 struct icmp_extobj_hdr extobj_hdr; 154 union { 155 char name[IFNAMSIZ]; 156 __be32 ifindex; 157 struct { 158 struct icmp_ext_echo_ctype3_hdr ctype3_hdr; 159 union { 160 __be32 ipv4_addr; 161 struct in6_addr ipv6_addr; 162 } ip_addr; 163 } addr; 164 } ident; 165 }; 166 #endif /* _UAPI_LINUX_ICMP_H */ 167