1 /* 2 * INET An implementation of the TCP/IP protocol suite for the LINUX 3 * operating system. INET is implemented using the BSD Socket 4 * interface as the means of communication with the user level. 5 * 6 * Definitions for the ICMP protocol. 7 * 8 * Version: @(#)icmp.h 1.0.3 04/28/93 9 * 10 * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 11 * 12 * This program is free software; you can redistribute it and/or 13 * modify it under the terms of the GNU General Public License 14 * as published by the Free Software Foundation; either version 15 * 2 of the License, or (at your option) any later version. 16 */ 17 #ifndef _LINUX_ICMP_H 18 #define _LINUX_ICMP_H 19 20 #define ICMP_ECHOREPLY 0 /* Echo Reply */ 21 #define ICMP_DEST_UNREACH 3 /* Destination Unreachable */ 22 #define ICMP_SOURCE_QUENCH 4 /* Source Quench */ 23 #define ICMP_REDIRECT 5 /* Redirect (change route) */ 24 #define ICMP_ECHO 8 /* Echo Request */ 25 #define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */ 26 #define ICMP_PARAMETERPROB 12 /* Parameter Problem */ 27 #define ICMP_TIMESTAMP 13 /* Timestamp Request */ 28 #define ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */ 29 #define ICMP_INFO_REQUEST 15 /* Information Request */ 30 #define ICMP_INFO_REPLY 16 /* Information Reply */ 31 #define ICMP_ADDRESS 17 /* Address Mask Request */ 32 #define ICMP_ADDRESSREPLY 18 /* Address Mask Reply */ 33 #define NR_ICMP_TYPES 18 34 35 36 /* Codes for UNREACH. */ 37 #define ICMP_NET_UNREACH 0 /* Network Unreachable */ 38 #define ICMP_HOST_UNREACH 1 /* Host Unreachable */ 39 #define ICMP_PROT_UNREACH 2 /* Protocol Unreachable */ 40 #define ICMP_PORT_UNREACH 3 /* Port Unreachable */ 41 #define ICMP_FRAG_NEEDED 4 /* Fragmentation Needed/DF set */ 42 #define ICMP_SR_FAILED 5 /* Source Route failed */ 43 #define ICMP_NET_UNKNOWN 6 44 #define ICMP_HOST_UNKNOWN 7 45 #define ICMP_HOST_ISOLATED 8 46 #define ICMP_NET_ANO 9 47 #define ICMP_HOST_ANO 10 48 #define ICMP_NET_UNR_TOS 11 49 #define ICMP_HOST_UNR_TOS 12 50 #define ICMP_PKT_FILTERED 13 /* Packet filtered */ 51 #define ICMP_PREC_VIOLATION 14 /* Precedence violation */ 52 #define ICMP_PREC_CUTOFF 15 /* Precedence cut off */ 53 #define NR_ICMP_UNREACH 15 /* instead of hardcoding immediate value */ 54 55 /* Codes for REDIRECT. */ 56 #define ICMP_REDIR_NET 0 /* Redirect Net */ 57 #define ICMP_REDIR_HOST 1 /* Redirect Host */ 58 #define ICMP_REDIR_NETTOS 2 /* Redirect Net for TOS */ 59 #define ICMP_REDIR_HOSTTOS 3 /* Redirect Host for TOS */ 60 61 /* Codes for TIME_EXCEEDED. */ 62 #define ICMP_EXC_TTL 0 /* TTL count exceeded */ 63 #define ICMP_EXC_FRAGTIME 1 /* Fragment Reass time exceeded */ 64 65 66 struct icmphdr { 67 __u8 type; 68 __u8 code; 69 __u16 checksum; 70 union { 71 struct { 72 __u16 id; 73 __u16 sequence; 74 } echo; 75 __u32 gateway; 76 struct { 77 __u16 __unused; 78 __u16 mtu; 79 } frag; 80 } un; 81 }; 82 83 /* 84 * constants for (set|get)sockopt 85 */ 86 87 #define ICMP_FILTER 1 88 89 struct icmp_filter { 90 __u32 data; 91 }; 92 93 94 #endif /* _LINUX_ICMP_H */ 95