1e2be04c7SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2607ca46eSDavid Howells /* 3607ca46eSDavid Howells * INET An implementation of the TCP/IP protocol suite for the LINUX 4607ca46eSDavid Howells * operating system. INET is implemented using the BSD Socket 5607ca46eSDavid Howells * interface as the means of communication with the user level. 6607ca46eSDavid Howells * 7607ca46eSDavid Howells * Definitions for the ICMP protocol. 8607ca46eSDavid Howells * 9607ca46eSDavid Howells * Version: @(#)icmp.h 1.0.3 04/28/93 10607ca46eSDavid Howells * 11607ca46eSDavid Howells * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 12607ca46eSDavid Howells * 13607ca46eSDavid Howells * This program is free software; you can redistribute it and/or 14607ca46eSDavid Howells * modify it under the terms of the GNU General Public License 15607ca46eSDavid Howells * as published by the Free Software Foundation; either version 16607ca46eSDavid Howells * 2 of the License, or (at your option) any later version. 17607ca46eSDavid Howells */ 18607ca46eSDavid Howells #ifndef _UAPI_LINUX_ICMP_H 19607ca46eSDavid Howells #define _UAPI_LINUX_ICMP_H 20607ca46eSDavid Howells 21607ca46eSDavid Howells #include <linux/types.h> 22eba75c58SWillem de Bruijn #include <asm/byteorder.h> 232b246b25SAndreas Roeseler #include <linux/if.h> 242b246b25SAndreas Roeseler #include <linux/in6.h> 25607ca46eSDavid Howells 26607ca46eSDavid Howells #define ICMP_ECHOREPLY 0 /* Echo Reply */ 27607ca46eSDavid Howells #define ICMP_DEST_UNREACH 3 /* Destination Unreachable */ 28607ca46eSDavid Howells #define ICMP_SOURCE_QUENCH 4 /* Source Quench */ 29607ca46eSDavid Howells #define ICMP_REDIRECT 5 /* Redirect (change route) */ 30607ca46eSDavid Howells #define ICMP_ECHO 8 /* Echo Request */ 31607ca46eSDavid Howells #define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */ 32607ca46eSDavid Howells #define ICMP_PARAMETERPROB 12 /* Parameter Problem */ 33607ca46eSDavid Howells #define ICMP_TIMESTAMP 13 /* Timestamp Request */ 34607ca46eSDavid Howells #define ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */ 35607ca46eSDavid Howells #define ICMP_INFO_REQUEST 15 /* Information Request */ 36607ca46eSDavid Howells #define ICMP_INFO_REPLY 16 /* Information Reply */ 37607ca46eSDavid Howells #define ICMP_ADDRESS 17 /* Address Mask Request */ 38607ca46eSDavid Howells #define ICMP_ADDRESSREPLY 18 /* Address Mask Reply */ 39607ca46eSDavid Howells #define NR_ICMP_TYPES 18 40607ca46eSDavid Howells 41607ca46eSDavid Howells 42607ca46eSDavid Howells /* Codes for UNREACH. */ 43607ca46eSDavid Howells #define ICMP_NET_UNREACH 0 /* Network Unreachable */ 44607ca46eSDavid Howells #define ICMP_HOST_UNREACH 1 /* Host Unreachable */ 45607ca46eSDavid Howells #define ICMP_PROT_UNREACH 2 /* Protocol Unreachable */ 46607ca46eSDavid Howells #define ICMP_PORT_UNREACH 3 /* Port Unreachable */ 47607ca46eSDavid Howells #define ICMP_FRAG_NEEDED 4 /* Fragmentation Needed/DF set */ 48607ca46eSDavid Howells #define ICMP_SR_FAILED 5 /* Source Route failed */ 49607ca46eSDavid Howells #define ICMP_NET_UNKNOWN 6 50607ca46eSDavid Howells #define ICMP_HOST_UNKNOWN 7 51607ca46eSDavid Howells #define ICMP_HOST_ISOLATED 8 52607ca46eSDavid Howells #define ICMP_NET_ANO 9 53607ca46eSDavid Howells #define ICMP_HOST_ANO 10 54607ca46eSDavid Howells #define ICMP_NET_UNR_TOS 11 55607ca46eSDavid Howells #define ICMP_HOST_UNR_TOS 12 56607ca46eSDavid Howells #define ICMP_PKT_FILTERED 13 /* Packet filtered */ 57607ca46eSDavid Howells #define ICMP_PREC_VIOLATION 14 /* Precedence violation */ 58607ca46eSDavid Howells #define ICMP_PREC_CUTOFF 15 /* Precedence cut off */ 59607ca46eSDavid Howells #define NR_ICMP_UNREACH 15 /* instead of hardcoding immediate value */ 60607ca46eSDavid Howells 61607ca46eSDavid Howells /* Codes for REDIRECT. */ 62607ca46eSDavid Howells #define ICMP_REDIR_NET 0 /* Redirect Net */ 63607ca46eSDavid Howells #define ICMP_REDIR_HOST 1 /* Redirect Host */ 64607ca46eSDavid Howells #define ICMP_REDIR_NETTOS 2 /* Redirect Net for TOS */ 65607ca46eSDavid Howells #define ICMP_REDIR_HOSTTOS 3 /* Redirect Host for TOS */ 66607ca46eSDavid Howells 67607ca46eSDavid Howells /* Codes for TIME_EXCEEDED. */ 68607ca46eSDavid Howells #define ICMP_EXC_TTL 0 /* TTL count exceeded */ 69607ca46eSDavid Howells #define ICMP_EXC_FRAGTIME 1 /* Fragment Reass time exceeded */ 70607ca46eSDavid Howells 712b246b25SAndreas Roeseler /* Codes for EXT_ECHO (PROBE) */ 722b246b25SAndreas Roeseler #define ICMP_EXT_ECHO 42 732b246b25SAndreas Roeseler #define ICMP_EXT_ECHOREPLY 43 74e542d29cSAndreas Roeseler #define ICMP_EXT_CODE_MAL_QUERY 1 /* Malformed Query */ 75e542d29cSAndreas Roeseler #define ICMP_EXT_CODE_NO_IF 2 /* No such Interface */ 76e542d29cSAndreas Roeseler #define ICMP_EXT_CODE_NO_TABLE_ENT 3 /* No such Table Entry */ 77e542d29cSAndreas Roeseler #define ICMP_EXT_CODE_MULT_IFS 4 /* Multiple Interfaces Satisfy Query */ 782b246b25SAndreas Roeseler 792b246b25SAndreas Roeseler /* Constants for EXT_ECHO (PROBE) */ 80e542d29cSAndreas Roeseler #define ICMP_EXT_ECHOREPLY_ACTIVE (1 << 2)/* active bit in reply message */ 81e542d29cSAndreas Roeseler #define ICMP_EXT_ECHOREPLY_IPV4 (1 << 1)/* ipv4 bit in reply message */ 82e542d29cSAndreas Roeseler #define ICMP_EXT_ECHOREPLY_IPV6 1 /* ipv6 bit in reply message */ 83e542d29cSAndreas Roeseler #define ICMP_EXT_ECHO_CTYPE_NAME 1 84e542d29cSAndreas Roeseler #define ICMP_EXT_ECHO_CTYPE_INDEX 2 85e542d29cSAndreas Roeseler #define ICMP_EXT_ECHO_CTYPE_ADDR 3 862b246b25SAndreas Roeseler #define ICMP_AFI_IP 1 /* Address Family Identifier for ipv4 */ 872b246b25SAndreas Roeseler #define ICMP_AFI_IP6 2 /* Address Family Identifier for ipv6 */ 88607ca46eSDavid Howells 89607ca46eSDavid Howells struct icmphdr { 90607ca46eSDavid Howells __u8 type; 91607ca46eSDavid Howells __u8 code; 92607ca46eSDavid Howells __sum16 checksum; 93607ca46eSDavid Howells union { 94607ca46eSDavid Howells struct { 95607ca46eSDavid Howells __be16 id; 96607ca46eSDavid Howells __be16 sequence; 97607ca46eSDavid Howells } echo; 98607ca46eSDavid Howells __be32 gateway; 99607ca46eSDavid Howells struct { 100607ca46eSDavid Howells __be16 __unused; 101607ca46eSDavid Howells __be16 mtu; 102607ca46eSDavid Howells } frag; 10320e1954fSEric Dumazet __u8 reserved[4]; 104607ca46eSDavid Howells } un; 105607ca46eSDavid Howells }; 106607ca46eSDavid Howells 107607ca46eSDavid Howells 108607ca46eSDavid Howells /* 109607ca46eSDavid Howells * constants for (set|get)sockopt 110607ca46eSDavid Howells */ 111607ca46eSDavid Howells 112607ca46eSDavid Howells #define ICMP_FILTER 1 113607ca46eSDavid Howells 114607ca46eSDavid Howells struct icmp_filter { 115607ca46eSDavid Howells __u32 data; 116607ca46eSDavid Howells }; 117607ca46eSDavid Howells 118eba75c58SWillem de Bruijn /* RFC 4884 extension struct: one per message */ 119eba75c58SWillem de Bruijn struct icmp_ext_hdr { 120eba75c58SWillem de Bruijn #if defined(__LITTLE_ENDIAN_BITFIELD) 121eba75c58SWillem de Bruijn __u8 reserved1:4, 122eba75c58SWillem de Bruijn version:4; 123eba75c58SWillem de Bruijn #elif defined(__BIG_ENDIAN_BITFIELD) 124eba75c58SWillem de Bruijn __u8 version:4, 125eba75c58SWillem de Bruijn reserved1:4; 126eba75c58SWillem de Bruijn #else 127eba75c58SWillem de Bruijn #error "Please fix <asm/byteorder.h>" 128eba75c58SWillem de Bruijn #endif 129eba75c58SWillem de Bruijn __u8 reserved2; 130eba75c58SWillem de Bruijn __sum16 checksum; 131eba75c58SWillem de Bruijn }; 132eba75c58SWillem de Bruijn 133eba75c58SWillem de Bruijn /* RFC 4884 extension object header: one for each object */ 134eba75c58SWillem de Bruijn struct icmp_extobj_hdr { 135eba75c58SWillem de Bruijn __be16 length; 136eba75c58SWillem de Bruijn __u8 class_num; 137eba75c58SWillem de Bruijn __u8 class_type; 138eba75c58SWillem de Bruijn }; 139607ca46eSDavid Howells 1402b246b25SAndreas Roeseler /* RFC 8335: 2.1 Header for c-type 3 payload */ 1412b246b25SAndreas Roeseler struct icmp_ext_echo_ctype3_hdr { 1422b246b25SAndreas Roeseler __be16 afi; 1432b246b25SAndreas Roeseler __u8 addrlen; 1442b246b25SAndreas Roeseler __u8 reserved; 1452b246b25SAndreas Roeseler }; 1462b246b25SAndreas Roeseler 1472b246b25SAndreas Roeseler /* RFC 8335: 2.1 Interface Identification Object */ 1482b246b25SAndreas Roeseler struct icmp_ext_echo_iio { 1492b246b25SAndreas Roeseler struct icmp_extobj_hdr extobj_hdr; 1502b246b25SAndreas Roeseler union { 1512b246b25SAndreas Roeseler char name[IFNAMSIZ]; 1522b246b25SAndreas Roeseler __be32 ifindex; 1532b246b25SAndreas Roeseler struct { 1542b246b25SAndreas Roeseler struct icmp_ext_echo_ctype3_hdr ctype3_hdr; 1552b246b25SAndreas Roeseler union { 156*e32ea44cSAndreas Roeseler __be32 ipv4_addr; 1572b246b25SAndreas Roeseler struct in6_addr ipv6_addr; 1582b246b25SAndreas Roeseler } ip_addr; 1592b246b25SAndreas Roeseler } addr; 1602b246b25SAndreas Roeseler } ident; 1612b246b25SAndreas Roeseler }; 162607ca46eSDavid Howells #endif /* _UAPI_LINUX_ICMP_H */ 163