1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * INET An implementation of the TCP/IP protocol suite for the LINUX 4*4882a593Smuzhiyun * operating system. INET is implemented using the BSD Socket 5*4882a593Smuzhiyun * interface as the means of communication with the user level. 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * Definitions for the ICMP protocol. 8*4882a593Smuzhiyun * 9*4882a593Smuzhiyun * Version: @(#)icmp.h 1.0.3 04/28/93 10*4882a593Smuzhiyun * 11*4882a593Smuzhiyun * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 12*4882a593Smuzhiyun * 13*4882a593Smuzhiyun * This program is free software; you can redistribute it and/or 14*4882a593Smuzhiyun * modify it under the terms of the GNU General Public License 15*4882a593Smuzhiyun * as published by the Free Software Foundation; either version 16*4882a593Smuzhiyun * 2 of the License, or (at your option) any later version. 17*4882a593Smuzhiyun */ 18*4882a593Smuzhiyun #ifndef _UAPI_LINUX_ICMP_H 19*4882a593Smuzhiyun #define _UAPI_LINUX_ICMP_H 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun #include <linux/types.h> 22*4882a593Smuzhiyun #include <asm/byteorder.h> 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun #define ICMP_ECHOREPLY 0 /* Echo Reply */ 25*4882a593Smuzhiyun #define ICMP_DEST_UNREACH 3 /* Destination Unreachable */ 26*4882a593Smuzhiyun #define ICMP_SOURCE_QUENCH 4 /* Source Quench */ 27*4882a593Smuzhiyun #define ICMP_REDIRECT 5 /* Redirect (change route) */ 28*4882a593Smuzhiyun #define ICMP_ECHO 8 /* Echo Request */ 29*4882a593Smuzhiyun #define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */ 30*4882a593Smuzhiyun #define ICMP_PARAMETERPROB 12 /* Parameter Problem */ 31*4882a593Smuzhiyun #define ICMP_TIMESTAMP 13 /* Timestamp Request */ 32*4882a593Smuzhiyun #define ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */ 33*4882a593Smuzhiyun #define ICMP_INFO_REQUEST 15 /* Information Request */ 34*4882a593Smuzhiyun #define ICMP_INFO_REPLY 16 /* Information Reply */ 35*4882a593Smuzhiyun #define ICMP_ADDRESS 17 /* Address Mask Request */ 36*4882a593Smuzhiyun #define ICMP_ADDRESSREPLY 18 /* Address Mask Reply */ 37*4882a593Smuzhiyun #define NR_ICMP_TYPES 18 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun /* Codes for UNREACH. */ 41*4882a593Smuzhiyun #define ICMP_NET_UNREACH 0 /* Network Unreachable */ 42*4882a593Smuzhiyun #define ICMP_HOST_UNREACH 1 /* Host Unreachable */ 43*4882a593Smuzhiyun #define ICMP_PROT_UNREACH 2 /* Protocol Unreachable */ 44*4882a593Smuzhiyun #define ICMP_PORT_UNREACH 3 /* Port Unreachable */ 45*4882a593Smuzhiyun #define ICMP_FRAG_NEEDED 4 /* Fragmentation Needed/DF set */ 46*4882a593Smuzhiyun #define ICMP_SR_FAILED 5 /* Source Route failed */ 47*4882a593Smuzhiyun #define ICMP_NET_UNKNOWN 6 48*4882a593Smuzhiyun #define ICMP_HOST_UNKNOWN 7 49*4882a593Smuzhiyun #define ICMP_HOST_ISOLATED 8 50*4882a593Smuzhiyun #define ICMP_NET_ANO 9 51*4882a593Smuzhiyun #define ICMP_HOST_ANO 10 52*4882a593Smuzhiyun #define ICMP_NET_UNR_TOS 11 53*4882a593Smuzhiyun #define ICMP_HOST_UNR_TOS 12 54*4882a593Smuzhiyun #define ICMP_PKT_FILTERED 13 /* Packet filtered */ 55*4882a593Smuzhiyun #define ICMP_PREC_VIOLATION 14 /* Precedence violation */ 56*4882a593Smuzhiyun #define ICMP_PREC_CUTOFF 15 /* Precedence cut off */ 57*4882a593Smuzhiyun #define NR_ICMP_UNREACH 15 /* instead of hardcoding immediate value */ 58*4882a593Smuzhiyun 59*4882a593Smuzhiyun /* Codes for REDIRECT. */ 60*4882a593Smuzhiyun #define ICMP_REDIR_NET 0 /* Redirect Net */ 61*4882a593Smuzhiyun #define ICMP_REDIR_HOST 1 /* Redirect Host */ 62*4882a593Smuzhiyun #define ICMP_REDIR_NETTOS 2 /* Redirect Net for TOS */ 63*4882a593Smuzhiyun #define ICMP_REDIR_HOSTTOS 3 /* Redirect Host for TOS */ 64*4882a593Smuzhiyun 65*4882a593Smuzhiyun /* Codes for TIME_EXCEEDED. */ 66*4882a593Smuzhiyun #define ICMP_EXC_TTL 0 /* TTL count exceeded */ 67*4882a593Smuzhiyun #define ICMP_EXC_FRAGTIME 1 /* Fragment Reass time exceeded */ 68*4882a593Smuzhiyun 69*4882a593Smuzhiyun 70*4882a593Smuzhiyun struct icmphdr { 71*4882a593Smuzhiyun __u8 type; 72*4882a593Smuzhiyun __u8 code; 73*4882a593Smuzhiyun __sum16 checksum; 74*4882a593Smuzhiyun union { 75*4882a593Smuzhiyun struct { 76*4882a593Smuzhiyun __be16 id; 77*4882a593Smuzhiyun __be16 sequence; 78*4882a593Smuzhiyun } echo; 79*4882a593Smuzhiyun __be32 gateway; 80*4882a593Smuzhiyun struct { 81*4882a593Smuzhiyun __be16 __unused; 82*4882a593Smuzhiyun __be16 mtu; 83*4882a593Smuzhiyun } frag; 84*4882a593Smuzhiyun __u8 reserved[4]; 85*4882a593Smuzhiyun } un; 86*4882a593Smuzhiyun }; 87*4882a593Smuzhiyun 88*4882a593Smuzhiyun 89*4882a593Smuzhiyun /* 90*4882a593Smuzhiyun * constants for (set|get)sockopt 91*4882a593Smuzhiyun */ 92*4882a593Smuzhiyun 93*4882a593Smuzhiyun #define ICMP_FILTER 1 94*4882a593Smuzhiyun 95*4882a593Smuzhiyun struct icmp_filter { 96*4882a593Smuzhiyun __u32 data; 97*4882a593Smuzhiyun }; 98*4882a593Smuzhiyun 99*4882a593Smuzhiyun /* RFC 4884 extension struct: one per message */ 100*4882a593Smuzhiyun struct icmp_ext_hdr { 101*4882a593Smuzhiyun #if defined(__LITTLE_ENDIAN_BITFIELD) 102*4882a593Smuzhiyun __u8 reserved1:4, 103*4882a593Smuzhiyun version:4; 104*4882a593Smuzhiyun #elif defined(__BIG_ENDIAN_BITFIELD) 105*4882a593Smuzhiyun __u8 version:4, 106*4882a593Smuzhiyun reserved1:4; 107*4882a593Smuzhiyun #else 108*4882a593Smuzhiyun #error "Please fix <asm/byteorder.h>" 109*4882a593Smuzhiyun #endif 110*4882a593Smuzhiyun __u8 reserved2; 111*4882a593Smuzhiyun __sum16 checksum; 112*4882a593Smuzhiyun }; 113*4882a593Smuzhiyun 114*4882a593Smuzhiyun /* RFC 4884 extension object header: one for each object */ 115*4882a593Smuzhiyun struct icmp_extobj_hdr { 116*4882a593Smuzhiyun __be16 length; 117*4882a593Smuzhiyun __u8 class_num; 118*4882a593Smuzhiyun __u8 class_type; 119*4882a593Smuzhiyun }; 120*4882a593Smuzhiyun 121*4882a593Smuzhiyun #endif /* _UAPI_LINUX_ICMP_H */ 122