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