1#ifndef __NETINET_IP_ICMP_H 2#define __NETINET_IP_ICMP_H 1 3 4 5#include <asm/types.h> 6#include <linux/icmp.h> 7 8#ifdef __USE_BSD 9/* 10 * Copyright (c) 1982, 1986, 1993 11 * The Regents of the University of California. All rights reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93 42 */ 43 44#include <netinet/in.h> 45#include <netinet/ip.h> 46 47/* 48 * Internal of an ICMP Router Advertisement 49 */ 50struct icmp_ra_addr 51{ 52 u_int32_t ira_addr; 53 u_int32_t ira_preference; 54}; 55 56struct icmp 57{ 58 u_int8_t icmp_type; /* type of message, see below */ 59 u_int8_t icmp_code; /* type sub code */ 60 u_int16_t icmp_cksum; /* ones complement checksum of struct */ 61 union 62 { 63 u_char ih_pptr; /* ICMP_PARAMPROB */ 64 struct in_addr ih_gwaddr; /* gateway address */ 65 struct ih_idseq /* echo datagram */ 66 { 67 u_int16_t icd_id; 68 u_int16_t icd_seq; 69 } ih_idseq; 70 u_int32_t ih_void; 71 72 /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */ 73 struct ih_pmtu 74 { 75 u_int16_t ipm_void; 76 u_int16_t ipm_nextmtu; 77 } ih_pmtu; 78 79 struct ih_rtradv 80 { 81 u_int8_t irt_num_addrs; 82 u_int8_t irt_wpa; 83 u_int16_t irt_lifetime; 84 } ih_rtradv; 85 } icmp_hun; 86#define icmp_pptr icmp_hun.ih_pptr 87#define icmp_gwaddr icmp_hun.ih_gwaddr 88#define icmp_id icmp_hun.ih_idseq.icd_id 89#define icmp_seq icmp_hun.ih_idseq.icd_seq 90#define icmp_void icmp_hun.ih_void 91#define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void 92#define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu 93#define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs 94#define icmp_wpa icmp_hun.ih_rtradv.irt_wpa 95#define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime 96 union 97 { 98 struct 99 { 100 u_int32_t its_otime; 101 u_int32_t its_rtime; 102 u_int32_t its_ttime; 103 } id_ts; 104 struct 105 { 106 struct ip idi_ip; 107 /* options and then 64 bits of data */ 108 } id_ip; 109 struct icmp_ra_addr id_radv; 110 u_int32_t id_mask; 111 u_int8_t id_data[1]; 112 } icmp_dun; 113#define icmp_otime icmp_dun.id_ts.its_otime 114#define icmp_rtime icmp_dun.id_ts.its_rtime 115#define icmp_ttime icmp_dun.id_ts.its_ttime 116#define icmp_ip icmp_dun.id_ip.idi_ip 117#define icmp_radv icmp_dun.id_radv 118#define icmp_mask icmp_dun.id_mask 119#define icmp_data icmp_dun.id_data 120}; 121 122/* 123 * Lower bounds on packet lengths for various types. 124 * For the error advice packets must first insure that the 125 * packet is large enough to contain the returned ip header. 126 * Only then can we do the check to see if 64 bits of packet 127 * data have been returned, since we need to check the returned 128 * ip header length. 129 */ 130#define ICMP_MINLEN 8 /* abs minimum */ 131#define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */ 132#define ICMP_MASKLEN 12 /* address mask */ 133#define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ 134#ifndef _IP_VHL 135#define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) 136 /* N.B.: must separately check that ip_hl >= 5 */ 137#else 138#define ICMP_ADVLEN(p) (8 + (IP_VHL_HL((p)->icmp_ip.ip_vhl) << 2) + 8) 139 /* N.B.: must separately check that header length >= 5 */ 140#endif 141 142/* Definition of type and code fields. */ 143/* defined above: ICMP_ECHOREPLY, ICMP_REDIRECT, ICMP_ECHO */ 144#define ICMP_UNREACH 3 /* dest unreachable, codes: */ 145#define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ 146#define ICMP_ROUTERADVERT 9 /* router advertisement */ 147#define ICMP_ROUTERSOLICIT 10 /* router solicitation */ 148#define ICMP_TIMXCEED 11 /* time exceeded, code: */ 149#define ICMP_PARAMPROB 12 /* ip header bad */ 150#define ICMP_TSTAMP 13 /* timestamp request */ 151#define ICMP_TSTAMPREPLY 14 /* timestamp reply */ 152#define ICMP_IREQ 15 /* information request */ 153#define ICMP_IREQREPLY 16 /* information reply */ 154#define ICMP_MASKREQ 17 /* address mask request */ 155#define ICMP_MASKREPLY 18 /* address mask reply */ 156 157#define ICMP_MAXTYPE 18 158 159/* UNREACH codes */ 160#define ICMP_UNREACH_NET 0 /* bad net */ 161#define ICMP_UNREACH_HOST 1 /* bad host */ 162#define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ 163#define ICMP_UNREACH_PORT 3 /* bad port */ 164#define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ 165#define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ 166#define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */ 167#define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */ 168#define ICMP_UNREACH_ISOLATED 8 /* src host isolated */ 169#define ICMP_UNREACH_NET_PROHIB 9 /* net denied */ 170#define ICMP_UNREACH_HOST_PROHIB 10 /* host denied */ 171#define ICMP_UNREACH_TOSNET 11 /* bad tos for net */ 172#define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */ 173#define ICMP_UNREACH_FILTER_PROHIB 13 /* admin prohib */ 174#define ICMP_UNREACH_HOST_PRECEDENCE 14 /* host prec vio. */ 175#define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* prec cutoff */ 176 177/* REDIRECT codes */ 178#define ICMP_REDIRECT_NET 0 /* for network */ 179#define ICMP_REDIRECT_HOST 1 /* for host */ 180#define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ 181#define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ 182 183/* TIMEXCEED codes */ 184#define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ 185#define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ 186 187/* PARAMPROB code */ 188#define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */ 189 190#define ICMP_INFOTYPE(type) \ 191 ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ 192 (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \ 193 (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ 194 (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ 195 (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) 196 197#endif /* __USE_BSD */ 198 199#endif /* netinet/ip_icmp.h */ 200