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/in.h> 24 #include <linux/if.h> 25 #include <linux/in6.h> 26 27 #define ICMP_ECHOREPLY 0 /* Echo Reply */ 28 #define ICMP_DEST_UNREACH 3 /* Destination Unreachable */ 29 #define ICMP_SOURCE_QUENCH 4 /* Source Quench */ 30 #define ICMP_REDIRECT 5 /* Redirect (change route) */ 31 #define ICMP_ECHO 8 /* Echo Request */ 32 #define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */ 33 #define ICMP_PARAMETERPROB 12 /* Parameter Problem */ 34 #define ICMP_TIMESTAMP 13 /* Timestamp Request */ 35 #define ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */ 36 #define ICMP_INFO_REQUEST 15 /* Information Request */ 37 #define ICMP_INFO_REPLY 16 /* Information Reply */ 38 #define ICMP_ADDRESS 17 /* Address Mask Request */ 39 #define ICMP_ADDRESSREPLY 18 /* Address Mask Reply */ 40 #define NR_ICMP_TYPES 18 41 42 43 /* Codes for UNREACH. */ 44 #define ICMP_NET_UNREACH 0 /* Network Unreachable */ 45 #define ICMP_HOST_UNREACH 1 /* Host Unreachable */ 46 #define ICMP_PROT_UNREACH 2 /* Protocol Unreachable */ 47 #define ICMP_PORT_UNREACH 3 /* Port Unreachable */ 48 #define ICMP_FRAG_NEEDED 4 /* Fragmentation Needed/DF set */ 49 #define ICMP_SR_FAILED 5 /* Source Route failed */ 50 #define ICMP_NET_UNKNOWN 6 51 #define ICMP_HOST_UNKNOWN 7 52 #define ICMP_HOST_ISOLATED 8 53 #define ICMP_NET_ANO 9 54 #define ICMP_HOST_ANO 10 55 #define ICMP_NET_UNR_TOS 11 56 #define ICMP_HOST_UNR_TOS 12 57 #define ICMP_PKT_FILTERED 13 /* Packet filtered */ 58 #define ICMP_PREC_VIOLATION 14 /* Precedence violation */ 59 #define ICMP_PREC_CUTOFF 15 /* Precedence cut off */ 60 #define NR_ICMP_UNREACH 15 /* instead of hardcoding immediate value */ 61 62 /* Codes for REDIRECT. */ 63 #define ICMP_REDIR_NET 0 /* Redirect Net */ 64 #define ICMP_REDIR_HOST 1 /* Redirect Host */ 65 #define ICMP_REDIR_NETTOS 2 /* Redirect Net for TOS */ 66 #define ICMP_REDIR_HOSTTOS 3 /* Redirect Host for TOS */ 67 68 /* Codes for TIME_EXCEEDED. */ 69 #define ICMP_EXC_TTL 0 /* TTL count exceeded */ 70 #define ICMP_EXC_FRAGTIME 1 /* Fragment Reass time exceeded */ 71 72 /* Codes for EXT_ECHO (PROBE) */ 73 #define ICMP_EXT_ECHO 42 74 #define ICMP_EXT_ECHOREPLY 43 75 #define ICMP_EXT_CODE_MAL_QUERY 1 /* Malformed Query */ 76 #define ICMP_EXT_CODE_NO_IF 2 /* No such Interface */ 77 #define ICMP_EXT_CODE_NO_TABLE_ENT 3 /* No such Table Entry */ 78 #define ICMP_EXT_CODE_MULT_IFS 4 /* Multiple Interfaces Satisfy Query */ 79 80 /* Constants for EXT_ECHO (PROBE) */ 81 #define ICMP_EXT_ECHOREPLY_ACTIVE (1 << 2)/* active bit in reply message */ 82 #define ICMP_EXT_ECHOREPLY_IPV4 (1 << 1)/* ipv4 bit in reply message */ 83 #define ICMP_EXT_ECHOREPLY_IPV6 1 /* ipv6 bit in reply message */ 84 #define ICMP_EXT_ECHO_CTYPE_NAME 1 85 #define ICMP_EXT_ECHO_CTYPE_INDEX 2 86 #define ICMP_EXT_ECHO_CTYPE_ADDR 3 87 #define ICMP_AFI_IP 1 /* Address Family Identifier for ipv4 */ 88 #define ICMP_AFI_IP6 2 /* Address Family Identifier for ipv6 */ 89 90 struct icmphdr { 91 uint8_t type; 92 uint8_t code; 93 __sum16 checksum; 94 union { 95 struct { 96 uint16_t id; 97 uint16_t sequence; 98 } echo; 99 uint32_t gateway; 100 struct { 101 uint16_t __unused; 102 uint16_t mtu; 103 } frag; 104 uint8_t reserved[4]; 105 } un; 106 }; 107 108 109 /* 110 * constants for (set|get)sockopt 111 */ 112 113 #define ICMP_FILTER 1 114 115 struct icmp_filter { 116 uint32_t data; 117 }; 118 119 /* RFC 4884 extension struct: one per message */ 120 struct icmp_ext_hdr { 121 #if defined(__LITTLE_ENDIAN_BITFIELD) 122 uint8_t reserved1:4, 123 version:4; 124 #elif defined(__BIG_ENDIAN_BITFIELD) 125 uint8_t version:4, 126 reserved1:4; 127 #else 128 #error "Please fix <asm/byteorder.h>" 129 #endif 130 uint8_t reserved2; 131 __sum16 checksum; 132 }; 133 134 /* RFC 4884 extension object header: one for each object */ 135 struct icmp_extobj_hdr { 136 uint16_t length; 137 uint8_t class_num; 138 uint8_t class_type; 139 }; 140 141 /* RFC 8335: 2.1 Header for c-type 3 payload */ 142 struct icmp_ext_echo_ctype3_hdr { 143 uint16_t afi; 144 uint8_t addrlen; 145 uint8_t reserved; 146 }; 147 148 /* RFC 8335: 2.1 Interface Identification Object */ 149 struct icmp_ext_echo_iio { 150 struct icmp_extobj_hdr extobj_hdr; 151 union { 152 char name[IFNAMSIZ]; 153 uint32_t ifindex; 154 struct { 155 struct icmp_ext_echo_ctype3_hdr ctype3_hdr; 156 union { 157 struct in_addr ipv4_addr; 158 struct in6_addr ipv6_addr; 159 } ip_addr; 160 } addr; 161 } ident; 162 }; 163 #endif /* _UAPI_LINUX_ICMP_H */ 164