1/* 2 * Copyright (c) 1982, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#ifndef NETINET_IP_ICMP_H 31#define NETINET_IP_ICMP_H 32 33#include <endian.h> 34#include <netinet/in.h> 35#include <netinet/ip.h> 36#include <stdint.h> 37 38struct icmp { 39 uint8_t icmp_type; 40 uint8_t icmp_code; 41 uint16_t icmp_cksum; 42 union { 43 uint8_t ih_pptr; 44 struct in_addr ih_gwaddr; 45 struct ih_idseq { 46 uint16_t icd_id; 47 uint16_t icd_seq; 48 } ih_idseq; 49 int32_t ih_void; 50 51 /* ICMP_UNREACH_NEEDFRAG (RFC 1191) */ 52 struct ih_pmtu { 53 uint16_t ipm_void; 54 uint16_t ipm_nextmtu; 55 } ih_pmtu; 56 } icmp_hun; 57 union { 58 struct id_ts { 59 uint32_t its_otime; 60 uint32_t its_rtime; 61 uint32_t its_ttime; 62 } id_ts; 63 struct id_ip { 64 struct ip idi_ip; 65 } id_ip; 66 uint32_t id_mask; 67 char id_data[1]; 68 } icmp_dun; 69}; 70 71#define icmp_pptr icmp_hun.ih_pptr 72#define icmp_gwaddr icmp_hun.ih_gwaddr 73#define icmp_id icmp_hun.ih_idseq.icd_id 74#define icmp_seq icmp_hun.ih_idseq.icd_seq 75#define icmp_void icmp_hun.ih_void 76#define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void 77#define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu 78 79#define icmp_otime icmp_dun.id_ts.its_otime 80#define icmp_rtime icmp_dun.id_ts.its_rtime 81#define icmp_ttime icmp_dun.id_ts.its_ttime 82#define icmp_ip icmp_dun.id_ip.idi_ip 83#define icmp_mask icmp_dun.id_mask 84#define icmp_data icmp_dun.id_data 85 86#define ICMP_MINLEN 8 /* absolute minimum length */ 87#define ICMP_TSLEN (8 + 3 * sizeof (uint32_t)) /* timestamp */ 88#define ICMP_MASKLEN 12 /* address mask */ 89#define ICMP_ADVLENMIN (8 + sizeof(struct ip) + 8) 90#define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) 91 92/* Definition of type and code field values. 93 * http://www.iana.org/assignments/icmp-parameters 94 */ 95#define ICMP_ECHOREPLY 0 /* echo reply */ 96#define ICMP_UNREACH 3 /* dest unreachable, codes: */ 97#define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ 98#define ICMP_REDIRECT 5 /* shorter route, codes: */ 99#define ICMP_ALTHOSTADDR 6 /* alternate host address */ 100#define ICMP_ECHO 8 /* echo service */ 101#define ICMP_ROUTERADVERT 9 /* router advertisement */ 102#define ICMP_ROUTERSOLICIT 10 /* router solicitation */ 103#define ICMP_TIMXCEED 11 /* time exceeded, code: */ 104#define ICMP_PARAMPROB 12 /* ip header bad */ 105#define ICMP_TSTAMP 13 /* timestamp request */ 106#define ICMP_TSTAMPREPLY 14 /* timestamp reply */ 107#define ICMP_IREQ 15 /* information request */ 108#define ICMP_IREQREPLY 16 /* information reply */ 109#define ICMP_MASKREQ 17 /* address mask request */ 110#define ICMP_MASKREPLY 18 /* address mask reply */ 111#define ICMP_TRACEROUTE 30 /* traceroute */ 112#define ICMP_DATACONVERR 31 /* data conversion error */ 113#define ICMP_MOBILE_REDIRECT 32 /* mobile host redirect */ 114#define ICMP_IPV6_WHEREAREYOU 33 /* IPv6 where-are-you */ 115#define ICMP_IPV6_IAMHERE 34 /* IPv6 i-am-here */ 116#define ICMP_MOBILE_REGREQUEST 35 /* mobile registration req */ 117#define ICMP_MOBILE_REGREPLY 36 /* mobile registration reply */ 118#define ICMP_SKIP 39 /* SKIP */ 119#define ICMP_PHOTURIS 40 /* Photuris */ 120 121#define ICMP_MAXTYPE 40 122 123#define ICMP_UNREACH_NET 0 /* bad net */ 124#define ICMP_UNREACH_HOST 1 /* bad host */ 125#define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ 126#define ICMP_UNREACH_PORT 3 /* bad port */ 127#define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ 128#define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ 129#define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */ 130#define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */ 131#define ICMP_UNREACH_ISOLATED 8 /* src host isolated */ 132#define ICMP_UNREACH_NET_PROHIB 9 /* for crypto devs */ 133#define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */ 134#define ICMP_UNREACH_TOSNET 11 /* bad tos for net */ 135#define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */ 136#define ICMP_UNREACH_FILTER_PROHIB 13 /* prohibited access */ 137#define ICMP_UNREACH_HOST_PRECEDENCE 14 /* precedence violat'n*/ 138#define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* precedence cutoff */ 139 140#define ICMP_REDIRECT_NET 0 /* for network */ 141#define ICMP_REDIRECT_HOST 1 /* for host */ 142#define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ 143#define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ 144 145#define ICMP_ROUTERADVERT_NORMAL 0 /* normal advertisement */ 146#define ICMP_ROUTERADVERT_NOROUTE_COMMON 16 /* selective routing */ 147 148#define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ 149#define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ 150 151#define ICMP_PARAMPROB_ERRATPTR 0 /* req. opt. absent */ 152#define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */ 153#define ICMP_PARAMPROB_LENGTH 2 /* bad length */ 154 155#define ICMP_PHOTURIS_UNKNOWN_INDEX 1 /* unknown sec index */ 156#define ICMP_PHOTURIS_AUTH_FAILED 2 /* auth failed */ 157#define ICMP_PHOTURIS_DECRYPT_FAILED 3 /* decrypt failed */ 158 159 160#define ICMP_INFOTYPE(type) \ 161 ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ 162 (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \ 163 (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ 164 (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ 165 (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) 166 167#endif /* NETINET_IP_ICMP_H */ 168