1/* Copyright (C) 1991, 92, 93, 95, 96, 97, 99 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, write to the Free 16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 17 02111-1307 USA. */ 18 19#ifndef __NETINET_IP_ICMP_H 20#define __NETINET_IP_ICMP_H 1 21 22#include <sys/cdefs.h> 23#include <sys/types.h> 24 25__BEGIN_DECLS 26 27struct icmphdr 28{ 29 u_int8_t type; /* message type */ 30 u_int8_t code; /* type sub-code */ 31 u_int16_t checksum; 32 union 33 { 34 struct 35 { 36 u_int16_t id; 37 u_int16_t sequence; 38 } echo; /* echo datagram */ 39 u_int32_t gateway; /* gateway address */ 40 struct 41 { 42 u_int16_t __unused; 43 u_int16_t mtu; 44 } frag; /* path mtu discovery */ 45 } un; 46}; 47 48#define ICMP_ECHOREPLY 0 /* Echo Reply */ 49#define ICMP_DEST_UNREACH 3 /* Destination Unreachable */ 50#define ICMP_SOURCE_QUENCH 4 /* Source Quench */ 51#define ICMP_REDIRECT 5 /* Redirect (change route) */ 52#define ICMP_ECHO 8 /* Echo Request */ 53#define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */ 54#define ICMP_PARAMETERPROB 12 /* Parameter Problem */ 55#define ICMP_TIMESTAMP 13 /* Timestamp Request */ 56#define ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */ 57#define ICMP_INFO_REQUEST 15 /* Information Request */ 58#define ICMP_INFO_REPLY 16 /* Information Reply */ 59#define ICMP_ADDRESS 17 /* Address Mask Request */ 60#define ICMP_ADDRESSREPLY 18 /* Address Mask Reply */ 61#define NR_ICMP_TYPES 18 62 63 64/* Codes for UNREACH. */ 65#define ICMP_NET_UNREACH 0 /* Network Unreachable */ 66#define ICMP_HOST_UNREACH 1 /* Host Unreachable */ 67#define ICMP_PROT_UNREACH 2 /* Protocol Unreachable */ 68#define ICMP_PORT_UNREACH 3 /* Port Unreachable */ 69#define ICMP_FRAG_NEEDED 4 /* Fragmentation Needed/DF set */ 70#define ICMP_SR_FAILED 5 /* Source Route failed */ 71#define ICMP_NET_UNKNOWN 6 72#define ICMP_HOST_UNKNOWN 7 73#define ICMP_HOST_ISOLATED 8 74#define ICMP_NET_ANO 9 75#define ICMP_HOST_ANO 10 76#define ICMP_NET_UNR_TOS 11 77#define ICMP_HOST_UNR_TOS 12 78#define ICMP_PKT_FILTERED 13 /* Packet filtered */ 79#define ICMP_PREC_VIOLATION 14 /* Precedence violation */ 80#define ICMP_PREC_CUTOFF 15 /* Precedence cut off */ 81#define NR_ICMP_UNREACH 15 /* instead of hardcoding immediate value */ 82 83/* Codes for REDIRECT. */ 84#define ICMP_REDIR_NET 0 /* Redirect Net */ 85#define ICMP_REDIR_HOST 1 /* Redirect Host */ 86#define ICMP_REDIR_NETTOS 2 /* Redirect Net for TOS */ 87#define ICMP_REDIR_HOSTTOS 3 /* Redirect Host for TOS */ 88 89/* Codes for TIME_EXCEEDED. */ 90#define ICMP_EXC_TTL 0 /* TTL count exceeded */ 91#define ICMP_EXC_FRAGTIME 1 /* Fragment Reass time exceeded */ 92 93 94#ifdef __USE_BSD 95/* 96 * Copyright (c) 1982, 1986, 1993 97 * The Regents of the University of California. All rights reserved. 98 * 99 * Redistribution and use in source and binary forms, with or without 100 * modification, are permitted provided that the following conditions 101 * are met: 102 * 1. Redistributions of source code must retain the above copyright 103 * notice, this list of conditions and the following disclaimer. 104 * 2. Redistributions in binary form must reproduce the above copyright 105 * notice, this list of conditions and the following disclaimer in the 106 * documentation and/or other materials provided with the distribution. 107 * 4. Neither the name of the University nor the names of its contributors 108 * may be used to endorse or promote products derived from this software 109 * without specific prior written permission. 110 * 111 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 112 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 113 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 114 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 115 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 116 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 117 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 118 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 119 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 120 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 121 * SUCH DAMAGE. 122 * 123 * @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93 124 */ 125 126#include <netinet/in.h> 127#include <netinet/ip.h> 128 129/* 130 * Internal of an ICMP Router Advertisement 131 */ 132struct icmp_ra_addr 133{ 134 u_int32_t ira_addr; 135 u_int32_t ira_preference; 136}; 137 138struct icmp 139{ 140 u_int8_t icmp_type; /* type of message, see below */ 141 u_int8_t icmp_code; /* type sub code */ 142 u_int16_t icmp_cksum; /* ones complement checksum of struct */ 143 union 144 { 145 u_char ih_pptr; /* ICMP_PARAMPROB */ 146 struct in_addr ih_gwaddr; /* gateway address */ 147 struct ih_idseq /* echo datagram */ 148 { 149 u_int16_t icd_id; 150 u_int16_t icd_seq; 151 } ih_idseq; 152 u_int32_t ih_void; 153 154 /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */ 155 struct ih_pmtu 156 { 157 u_int16_t ipm_void; 158 u_int16_t ipm_nextmtu; 159 } ih_pmtu; 160 161 struct ih_rtradv 162 { 163 u_int8_t irt_num_addrs; 164 u_int8_t irt_wpa; 165 u_int16_t irt_lifetime; 166 } ih_rtradv; 167 } icmp_hun; 168#define icmp_pptr icmp_hun.ih_pptr 169#define icmp_gwaddr icmp_hun.ih_gwaddr 170#define icmp_id icmp_hun.ih_idseq.icd_id 171#define icmp_seq icmp_hun.ih_idseq.icd_seq 172#define icmp_void icmp_hun.ih_void 173#define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void 174#define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu 175#define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs 176#define icmp_wpa icmp_hun.ih_rtradv.irt_wpa 177#define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime 178 union 179 { 180 struct 181 { 182 u_int32_t its_otime; 183 u_int32_t its_rtime; 184 u_int32_t its_ttime; 185 } id_ts; 186 struct 187 { 188 struct ip idi_ip; 189 /* options and then 64 bits of data */ 190 } id_ip; 191 struct icmp_ra_addr id_radv; 192 u_int32_t id_mask; 193 u_int8_t id_data[1]; 194 } icmp_dun; 195#define icmp_otime icmp_dun.id_ts.its_otime 196#define icmp_rtime icmp_dun.id_ts.its_rtime 197#define icmp_ttime icmp_dun.id_ts.its_ttime 198#define icmp_ip icmp_dun.id_ip.idi_ip 199#define icmp_radv icmp_dun.id_radv 200#define icmp_mask icmp_dun.id_mask 201#define icmp_data icmp_dun.id_data 202}; 203 204/* 205 * Lower bounds on packet lengths for various types. 206 * For the error advice packets must first insure that the 207 * packet is large enough to contain the returned ip header. 208 * Only then can we do the check to see if 64 bits of packet 209 * data have been returned, since we need to check the returned 210 * ip header length. 211 */ 212#define ICMP_MINLEN 8 /* abs minimum */ 213#define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */ 214#define ICMP_MASKLEN 12 /* address mask */ 215#define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ 216#ifndef _IP_VHL 217#define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) 218 /* N.B.: must separately check that ip_hl >= 5 */ 219#else 220#define ICMP_ADVLEN(p) (8 + (IP_VHL_HL((p)->icmp_ip.ip_vhl) << 2) + 8) 221 /* N.B.: must separately check that header length >= 5 */ 222#endif 223 224/* Definition of type and code fields. */ 225/* defined above: ICMP_ECHOREPLY, ICMP_REDIRECT, ICMP_ECHO */ 226#define ICMP_UNREACH 3 /* dest unreachable, codes: */ 227#define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ 228#define ICMP_ROUTERADVERT 9 /* router advertisement */ 229#define ICMP_ROUTERSOLICIT 10 /* router solicitation */ 230#define ICMP_TIMXCEED 11 /* time exceeded, code: */ 231#define ICMP_PARAMPROB 12 /* ip header bad */ 232#define ICMP_TSTAMP 13 /* timestamp request */ 233#define ICMP_TSTAMPREPLY 14 /* timestamp reply */ 234#define ICMP_IREQ 15 /* information request */ 235#define ICMP_IREQREPLY 16 /* information reply */ 236#define ICMP_MASKREQ 17 /* address mask request */ 237#define ICMP_MASKREPLY 18 /* address mask reply */ 238 239#define ICMP_MAXTYPE 18 240 241/* UNREACH codes */ 242#define ICMP_UNREACH_NET 0 /* bad net */ 243#define ICMP_UNREACH_HOST 1 /* bad host */ 244#define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ 245#define ICMP_UNREACH_PORT 3 /* bad port */ 246#define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ 247#define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ 248#define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */ 249#define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */ 250#define ICMP_UNREACH_ISOLATED 8 /* src host isolated */ 251#define ICMP_UNREACH_NET_PROHIB 9 /* net denied */ 252#define ICMP_UNREACH_HOST_PROHIB 10 /* host denied */ 253#define ICMP_UNREACH_TOSNET 11 /* bad tos for net */ 254#define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */ 255#define ICMP_UNREACH_FILTER_PROHIB 13 /* admin prohib */ 256#define ICMP_UNREACH_HOST_PRECEDENCE 14 /* host prec vio. */ 257#define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* prec cutoff */ 258 259/* REDIRECT codes */ 260#define ICMP_REDIRECT_NET 0 /* for network */ 261#define ICMP_REDIRECT_HOST 1 /* for host */ 262#define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ 263#define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ 264 265/* TIMEXCEED codes */ 266#define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ 267#define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ 268 269/* PARAMPROB code */ 270#define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */ 271 272#define ICMP_INFOTYPE(type) \ 273 ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ 274 (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \ 275 (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ 276 (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ 277 (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) 278 279#endif /* __USE_BSD */ 280 281__END_DECLS 282 283#endif /* netinet/ip_icmp.h */ 284