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 <sys/cdefs.h> 39 40 #include <linux/icmp.h> 41 #include <netinet/ip.h> 42 43 __BEGIN_DECLS 44 45 /* 46 * Interface Control Message Protocol Definitions. 47 * Per RFC 792, September 1981. 48 * RFC 950, August 1985. (Address Mask Request / Reply) 49 * RFC 1256, September 1991. (Router Advertisement and Solicitation) 50 * RFC 1108, November 1991. (Param Problem, Missing Req. Option) 51 * RFC 1393, January 1993. (Traceroute) 52 * RFC 1475, June 1993. (Datagram Conversion Error) 53 * RFC 1812, June 1995. (adm prohib, host precedence, precedence cutoff) 54 * RFC 2002, October 1996. (Mobility changes to Router Advertisement) 55 */ 56 57 /* 58 * ICMP Router Advertisement data 59 */ 60 struct icmp_ra_addr { 61 uint32_t ira_addr; 62 uint32_t ira_preference; 63 }; 64 65 /* 66 * Structure of an icmp header. 67 */ 68 struct icmp { 69 uint8_t icmp_type; /* type of message, see below */ 70 uint8_t icmp_code; /* type sub code */ 71 uint16_t icmp_cksum; /* ones complement cksum of struct */ 72 union { 73 uint8_t ih_pptr; /* ICMP_PARAMPROB */ 74 struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ 75 struct ih_idseq { 76 uint16_t icd_id; 77 uint16_t icd_seq; 78 } ih_idseq; 79 int32_t ih_void; 80 81 /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */ 82 struct ih_pmtu { 83 uint16_t ipm_void; 84 uint16_t ipm_nextmtu; 85 } ih_pmtu; 86 87 struct ih_rtradv { 88 uint8_t irt_num_addrs; 89 uint8_t irt_wpa; 90 uint16_t irt_lifetime; 91 } ih_rtradv; 92 } icmp_hun; 93 #define icmp_pptr icmp_hun.ih_pptr 94 #define icmp_gwaddr icmp_hun.ih_gwaddr 95 #define icmp_id icmp_hun.ih_idseq.icd_id 96 #define icmp_seq icmp_hun.ih_idseq.icd_seq 97 #define icmp_void icmp_hun.ih_void 98 #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void 99 #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu 100 #define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs 101 #define icmp_wpa icmp_hun.ih_rtradv.irt_wpa 102 #define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime 103 union { 104 struct id_ts { 105 uint32_t its_otime; 106 uint32_t its_rtime; 107 uint32_t its_ttime; 108 } id_ts; 109 struct id_ip { 110 struct ip idi_ip; 111 /* options and then 64 bits of data */ 112 } id_ip; 113 uint32_t id_mask; 114 int8_t id_data[1]; 115 } icmp_dun; 116 #define icmp_otime icmp_dun.id_ts.its_otime 117 #define icmp_rtime icmp_dun.id_ts.its_rtime 118 #define icmp_ttime icmp_dun.id_ts.its_ttime 119 #define icmp_ip icmp_dun.id_ip.idi_ip 120 #define icmp_mask icmp_dun.id_mask 121 #define icmp_data icmp_dun.id_data 122 }; 123 124 /* 125 * For IPv6 transition related ICMP errors. 126 */ 127 #define ICMP_V6ADVLENMIN (8 + sizeof(struct ip) + 40) 128 #define ICMP_V6ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 40) 129 130 /* 131 * Lower bounds on packet lengths for various types. 132 * For the error advice packets must first insure that the 133 * packet is large enough to contain the returned ip header. 134 * Only then can we do the check to see if 64 bits of packet 135 * data have been returned, since we need to check the returned 136 * ip header length. 137 */ 138 #define ICMP_MINLEN 8 /* abs minimum */ 139 #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */ 140 #define ICMP_MASKLEN 12 /* address mask */ 141 #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ 142 #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) 143 /* N.B.: must separately check that ip_hl >= 5 */ 144 145 /* 146 * Definition of type and code field values. 147 * http://www.iana.org/assignments/icmp-parameters 148 */ 149 #define ICMP_ECHOREPLY 0 /* echo reply */ 150 #define ICMP_UNREACH 3 /* dest unreachable, codes: */ 151 #define ICMP_UNREACH_NET 0 /* bad net */ 152 #define ICMP_UNREACH_HOST 1 /* bad host */ 153 #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ 154 #define ICMP_UNREACH_PORT 3 /* bad port */ 155 #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ 156 #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ 157 #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */ 158 #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */ 159 #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */ 160 #define ICMP_UNREACH_NET_PROHIB 9 /* for crypto devs */ 161 #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */ 162 #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */ 163 #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */ 164 #define ICMP_UNREACH_FILTER_PROHIB 13 /* prohibited access */ 165 #define ICMP_UNREACH_HOST_PRECEDENCE 14 /* precedence violat'n*/ 166 #define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* precedence cutoff */ 167 #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ 168 #define ICMP_REDIRECT 5 /* shorter route, codes: */ 169 #define ICMP_REDIRECT_NET 0 /* for network */ 170 #define ICMP_REDIRECT_HOST 1 /* for host */ 171 #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ 172 #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ 173 #define ICMP_ALTHOSTADDR 6 /* alternate host address */ 174 #define ICMP_ECHO 8 /* echo service */ 175 #define ICMP_ROUTERADVERT 9 /* router advertisement */ 176 #define ICMP_ROUTERADVERT_NORMAL 0 /* normal advertisement */ 177 #define ICMP_ROUTERADVERT_NOROUTE_COMMON 16 /* selective routing */ 178 #define ICMP_ROUTERSOLICIT 10 /* router solicitation */ 179 #define ICMP_TIMXCEED 11 /* time exceeded, code: */ 180 #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ 181 #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ 182 #define ICMP_PARAMPROB 12 /* ip header bad */ 183 #define ICMP_PARAMPROB_ERRATPTR 0 /* req. opt. absent */ 184 #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */ 185 #define ICMP_PARAMPROB_LENGTH 2 /* bad length */ 186 #define ICMP_TSTAMP 13 /* timestamp request */ 187 #define ICMP_TSTAMPREPLY 14 /* timestamp reply */ 188 #define ICMP_IREQ 15 /* information request */ 189 #define ICMP_IREQREPLY 16 /* information reply */ 190 #define ICMP_MASKREQ 17 /* address mask request */ 191 #define ICMP_MASKREPLY 18 /* address mask reply */ 192 #define ICMP_TRACEROUTE 30 /* traceroute */ 193 #define ICMP_DATACONVERR 31 /* data conversion error */ 194 #define ICMP_MOBILE_REDIRECT 32 /* mobile host redirect */ 195 #define ICMP_IPV6_WHEREAREYOU 33 /* IPv6 where-are-you */ 196 #define ICMP_IPV6_IAMHERE 34 /* IPv6 i-am-here */ 197 #define ICMP_MOBILE_REGREQUEST 35 /* mobile registration req */ 198 #define ICMP_MOBILE_REGREPLY 36 /* mobile registration reply */ 199 #define ICMP_SKIP 39 /* SKIP */ 200 #define ICMP_PHOTURIS 40 /* Photuris */ 201 #define ICMP_PHOTURIS_UNKNOWN_INDEX 1 /* unknown sec index */ 202 #define ICMP_PHOTURIS_AUTH_FAILED 2 /* auth failed */ 203 #define ICMP_PHOTURIS_DECRYPT_FAILED 3 /* decrypt failed */ 204 205 #define ICMP_MAXTYPE 40 206 207 #define ICMP_INFOTYPE(type) \ 208 ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ 209 (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \ 210 (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ 211 (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ 212 (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) 213 214 __END_DECLS 215 216 #endif /* _NETINET_IP_ICMP_H_ */ 217