1 /* $OpenBSD: ip_icmp.h,v 1.21 2005/07/31 03:30:55 pascoe Exp $ */ 2 /* $NetBSD: ip_icmp.h,v 1.10 1996/02/13 23:42:28 christos Exp $ */ 3 4 /* 5 * Copyright (c) 1982, 1986, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93 33 */ 34 35 #ifndef _NETINET_IP_ICMP_H_ 36 #define _NETINET_IP_ICMP_H_ 37 38 #include <netinet/ip.h> 39 #include <sys/cdefs.h> 40 41 __BEGIN_DECLS 42 43 /* 44 * Interface Control Message Protocol Definitions. 45 * Per RFC 792, September 1981. 46 * RFC 950, August 1985. (Address Mask Request / Reply) 47 * RFC 1256, September 1991. (Router Advertisement and Solicitation) 48 * RFC 1108, November 1991. (Param Problem, Missing Req. Option) 49 * RFC 1393, January 1993. (Traceroute) 50 * RFC 1475, June 1993. (Datagram Conversion Error) 51 * RFC 1812, June 1995. (adm prohib, host precedence, precedence cutoff) 52 * RFC 2002, October 1996. (Mobility changes to Router Advertisement) 53 */ 54 55 /* 56 * ICMP Router Advertisement data 57 */ 58 struct icmp_ra_addr { 59 uint32_t ira_addr; 60 uint32_t ira_preference; 61 }; 62 63 /* 64 * Structure of an icmp header. 65 */ 66 struct icmp { 67 uint8_t icmp_type; /* type of message, see below */ 68 uint8_t icmp_code; /* type sub code */ 69 uint16_t icmp_cksum; /* ones complement cksum of struct */ 70 union { 71 uint8_t ih_pptr; /* ICMP_PARAMPROB */ 72 struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ 73 struct ih_idseq { 74 uint16_t icd_id; 75 uint16_t icd_seq; 76 } ih_idseq; 77 int32_t ih_void; 78 79 /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */ 80 struct ih_pmtu { 81 uint16_t ipm_void; 82 uint16_t ipm_nextmtu; 83 } ih_pmtu; 84 85 struct ih_rtradv { 86 uint8_t irt_num_addrs; 87 uint8_t irt_wpa; 88 uint16_t irt_lifetime; 89 } ih_rtradv; 90 } icmp_hun; 91 #define icmp_pptr icmp_hun.ih_pptr 92 #define icmp_gwaddr icmp_hun.ih_gwaddr 93 #define icmp_id icmp_hun.ih_idseq.icd_id 94 #define icmp_seq icmp_hun.ih_idseq.icd_seq 95 #define icmp_void icmp_hun.ih_void 96 #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void 97 #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu 98 #define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs 99 #define icmp_wpa icmp_hun.ih_rtradv.irt_wpa 100 #define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime 101 union { 102 struct id_ts { 103 uint32_t its_otime; 104 uint32_t its_rtime; 105 uint32_t its_ttime; 106 } id_ts; 107 struct id_ip { 108 struct ip idi_ip; 109 /* options and then 64 bits of data */ 110 } id_ip; 111 uint32_t id_mask; 112 int8_t id_data[1]; 113 } icmp_dun; 114 #define icmp_otime icmp_dun.id_ts.its_otime 115 #define icmp_rtime icmp_dun.id_ts.its_rtime 116 #define icmp_ttime icmp_dun.id_ts.its_ttime 117 #define icmp_ip icmp_dun.id_ip.idi_ip 118 #define icmp_mask icmp_dun.id_mask 119 #define icmp_data icmp_dun.id_data 120 }; 121 122 /* 123 * For IPv6 transition related ICMP errors. 124 */ 125 #define ICMP_V6ADVLENMIN (8 + sizeof(struct ip) + 40) 126 #define ICMP_V6ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 40) 127 128 /* 129 * Lower bounds on packet lengths for various types. 130 * For the error advice packets must first insure that the 131 * packet is large enough to contain the returned ip header. 132 * Only then can we do the check to see if 64 bits of packet 133 * data have been returned, since we need to check the returned 134 * ip header length. 135 */ 136 #define ICMP_MINLEN 8 /* abs minimum */ 137 #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */ 138 #define ICMP_MASKLEN 12 /* address mask */ 139 #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ 140 #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) 141 /* N.B.: must separately check that ip_hl >= 5 */ 142 143 /* 144 * Definition of type and code field values. 145 * http://www.iana.org/assignments/icmp-parameters 146 */ 147 #define ICMP_ECHOREPLY 0 /* echo reply */ 148 #define ICMP_UNREACH 3 /* dest unreachable, codes: */ 149 #define ICMP_UNREACH_NET 0 /* bad net */ 150 #define ICMP_UNREACH_HOST 1 /* bad host */ 151 #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ 152 #define ICMP_UNREACH_PORT 3 /* bad port */ 153 #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ 154 #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ 155 #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */ 156 #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */ 157 #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */ 158 #define ICMP_UNREACH_NET_PROHIB 9 /* for crypto devs */ 159 #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */ 160 #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */ 161 #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */ 162 #define ICMP_UNREACH_FILTER_PROHIB 13 /* prohibited access */ 163 #define ICMP_UNREACH_HOST_PRECEDENCE 14 /* precedence violat'n*/ 164 #define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* precedence cutoff */ 165 #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ 166 #define ICMP_REDIRECT 5 /* shorter route, codes: */ 167 #define ICMP_REDIRECT_NET 0 /* for network */ 168 #define ICMP_REDIRECT_HOST 1 /* for host */ 169 #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ 170 #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ 171 #define ICMP_ALTHOSTADDR 6 /* alternate host address */ 172 #define ICMP_ECHO 8 /* echo service */ 173 #define ICMP_ROUTERADVERT 9 /* router advertisement */ 174 #define ICMP_ROUTERADVERT_NORMAL 0 /* normal advertisement */ 175 #define ICMP_ROUTERADVERT_NOROUTE_COMMON 16 /* selective routing */ 176 #define ICMP_ROUTERSOLICIT 10 /* router solicitation */ 177 #define ICMP_TIMXCEED 11 /* time exceeded, code: */ 178 #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ 179 #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ 180 #define ICMP_PARAMPROB 12 /* ip header bad */ 181 #define ICMP_PARAMPROB_ERRATPTR 0 /* req. opt. absent */ 182 #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */ 183 #define ICMP_PARAMPROB_LENGTH 2 /* bad length */ 184 #define ICMP_TSTAMP 13 /* timestamp request */ 185 #define ICMP_TSTAMPREPLY 14 /* timestamp reply */ 186 #define ICMP_IREQ 15 /* information request */ 187 #define ICMP_IREQREPLY 16 /* information reply */ 188 #define ICMP_MASKREQ 17 /* address mask request */ 189 #define ICMP_MASKREPLY 18 /* address mask reply */ 190 #define ICMP_TRACEROUTE 30 /* traceroute */ 191 #define ICMP_DATACONVERR 31 /* data conversion error */ 192 #define ICMP_MOBILE_REDIRECT 32 /* mobile host redirect */ 193 #define ICMP_IPV6_WHEREAREYOU 33 /* IPv6 where-are-you */ 194 #define ICMP_IPV6_IAMHERE 34 /* IPv6 i-am-here */ 195 #define ICMP_MOBILE_REGREQUEST 35 /* mobile registration req */ 196 #define ICMP_MOBILE_REGREPLY 36 /* mobile registration reply */ 197 #define ICMP_SKIP 39 /* SKIP */ 198 #define ICMP_PHOTURIS 40 /* Photuris */ 199 #define ICMP_PHOTURIS_UNKNOWN_INDEX 1 /* unknown sec index */ 200 #define ICMP_PHOTURIS_AUTH_FAILED 2 /* auth failed */ 201 #define ICMP_PHOTURIS_DECRYPT_FAILED 3 /* decrypt failed */ 202 203 #define ICMP_MAXTYPE 40 204 205 #define ICMP_INFOTYPE(type) \ 206 ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ 207 (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \ 208 (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ 209 (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ 210 (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) 211 212 __END_DECLS 213 214 #endif /* _NETINET_IP_ICMP_H_ */ 215