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 27 struct 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 */ 132 struct icmp_ra_addr 133 { 134 u_int32_t ira_addr; 135 u_int32_t ira_preference; 136 }; 137 138 struct 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