1 /* 2 * Copyright 1997-2002 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 /* 7 * Copyright (c) 1982, 1986, 1993 8 * The Regents of the University of California. All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 /* 40 * Interface Control Message Protocol Definitions. 41 * Per RFC 792, September 1981. 42 */ 43 44 #ifndef _NETINET_IP_ICMP_H 45 #define _NETINET_IP_ICMP_H 46 47 #pragma ident "%Z%%M% %I% %E% SMI" 48 /* ip_icmp.h 1.9 88/08/19 SMI; from UCB 7.3 12/7/87 */ 49 50 #ifdef __cplusplus 51 extern "C" { 52 #endif 53 54 /* 55 * Structure of an icmp header. 56 */ 57 struct icmp { 58 uchar_t icmp_type; /* type of message, see below */ 59 uchar_t icmp_code; /* type sub code */ 60 uint16_t icmp_cksum; /* ones complement cksum of struct */ 61 union { 62 uchar_t ih_pptr; /* ICMP_PARAMPROB */ 63 struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ 64 struct ih_idseq { 65 uint16_t icd_id; 66 uint16_t icd_seq; 67 } ih_idseq; 68 int ih_void; 69 70 /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */ 71 struct ih_pmtu { 72 uint16_t ipm_void; 73 uint16_t ipm_nextmtu; 74 } ih_pmtu; 75 76 struct ih_rtradv { 77 uchar_t irt_num_addrs; 78 uchar_t irt_wpa; 79 uint16_t irt_lifetime; 80 } ih_rtradv; 81 } icmp_hun; 82 #define icmp_pptr icmp_hun.ih_pptr 83 #define icmp_gwaddr icmp_hun.ih_gwaddr 84 #define icmp_id icmp_hun.ih_idseq.icd_id 85 #define icmp_seq icmp_hun.ih_idseq.icd_seq 86 #define icmp_void icmp_hun.ih_void 87 #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void 88 #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu 89 union { 90 struct id_ts { 91 n_time its_otime; 92 n_time its_rtime; 93 n_time its_ttime; 94 } id_ts; 95 struct id_ip { 96 struct ip idi_ip; 97 /* options and then 64 bits of data */ 98 } id_ip; 99 uint32_t id_mask; 100 char id_data[1]; 101 } icmp_dun; 102 #define icmp_otime icmp_dun.id_ts.its_otime 103 #define icmp_rtime icmp_dun.id_ts.its_rtime 104 #define icmp_ttime icmp_dun.id_ts.its_ttime 105 #define icmp_ip icmp_dun.id_ip.idi_ip 106 #define icmp_mask icmp_dun.id_mask 107 #define icmp_data icmp_dun.id_data 108 }; 109 110 /* 111 * Lower bounds on packet lengths for various types. 112 * For the error advice packets must first insure that the 113 * packet is large enough to contain the returned ip header. 114 * Only then can we do the check to see if 64 bits of packet 115 * data have been returned, since we need to check the returned 116 * ip header length. 117 */ 118 #define ICMP_MINLEN 8 /* abs minimum */ 119 #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */ 120 #define ICMP_MASKLEN 12 /* address mask */ 121 #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ 122 #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) 123 /* N.B.: must separately check that ip_hl >= 5 */ 124 125 /* 126 * Definition of type and code field values. 127 */ 128 #define ICMP_ECHOREPLY 0 /* echo reply */ 129 #define ICMP_UNREACH 3 /* dest unreachable, codes: */ 130 #define ICMP_UNREACH_NET 0 /* bad net */ 131 #define ICMP_UNREACH_HOST 1 /* bad host */ 132 #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ 133 #define ICMP_UNREACH_PORT 3 /* bad port */ 134 #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ 135 #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ 136 #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */ 137 #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */ 138 #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */ 139 #define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */ 140 #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */ 141 #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */ 142 #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */ 143 #define ICMP_UNREACH_FILTER_PROHIB 13 /* prohibited access */ 144 #define ICMP_UNREACH_HOST_PRECEDENCE 14 /* pred violationn */ 145 #define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* precedence cutoff */ 146 #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ 147 #define ICMP_REDIRECT 5 /* shorter route, codes: */ 148 #define ICMP_REDIRECT_NET 0 /* for network */ 149 #define ICMP_REDIRECT_HOST 1 /* for host */ 150 #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ 151 #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ 152 #define ICMP_ECHO 8 /* echo service */ 153 #define ICMP_ROUTERADVERT 9 /* router advertisement */ 154 #define ICMP_ROUTERADVERT_COMMON 0 /* common traffic */ 155 #define ICMP_ROUTERADVERT_NOCOMMON 16 /* no common traffic */ 156 #define ICMP_ROUTERSOLICIT 10 /* router solicitation */ 157 #define ICMP_TIMXCEED 11 /* time exceeded, code: */ 158 #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ 159 #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ 160 #define ICMP_PARAMPROB 12 /* ip header bad */ 161 #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */ 162 #define ICMP_PARAMPROB_BADLENGTH 2 /* Bad Length */ 163 #define ICMP_TSTAMP 13 /* timestamp request */ 164 #define ICMP_TSTAMPREPLY 14 /* timestamp reply */ 165 #define ICMP_IREQ 15 /* information request */ 166 #define ICMP_IREQREPLY 16 /* information reply */ 167 #define ICMP_MASKREQ 17 /* address mask request */ 168 #define ICMP_MASKREPLY 18 /* address mask reply */ 169 170 #define ICMP_MAXTYPE 18 171 172 #define ICMP_INFOTYPE(type) \ 173 ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ 174 (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \ 175 (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ 176 (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ 177 (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) 178 179 #ifdef __cplusplus 180 } 181 #endif 182 183 #endif /* _NETINET_IP_ICMP_H */ 184