1*83ee113eSDavid van Moolenbroek /* $NetBSD: ip_icmp.h,v 1.1.1.2 2014/07/12 11:57:57 spz Exp $ */ 2*83ee113eSDavid van Moolenbroek /* NetBSD: ip_icmp.h,v 1.11 1996/08/03 15:48:18 neil Exp */ 3*83ee113eSDavid van Moolenbroek 4*83ee113eSDavid van Moolenbroek /* 5*83ee113eSDavid van Moolenbroek * Copyright (c) 1982, 1986, 1993 6*83ee113eSDavid van Moolenbroek * The Regents of the University of California. All rights reserved. 7*83ee113eSDavid van Moolenbroek * 8*83ee113eSDavid van Moolenbroek * Redistribution and use in source and binary forms, with or without 9*83ee113eSDavid van Moolenbroek * modification, are permitted provided that the following conditions 10*83ee113eSDavid van Moolenbroek * are met: 11*83ee113eSDavid van Moolenbroek * 1. Redistributions of source code must retain the above copyright 12*83ee113eSDavid van Moolenbroek * notice, this list of conditions and the following disclaimer. 13*83ee113eSDavid van Moolenbroek * 2. Redistributions in binary form must reproduce the above copyright 14*83ee113eSDavid van Moolenbroek * notice, this list of conditions and the following disclaimer in the 15*83ee113eSDavid van Moolenbroek * documentation and/or other materials provided with the distribution. 16*83ee113eSDavid van Moolenbroek * 3. Neither the name of the University nor the names of its contributors 17*83ee113eSDavid van Moolenbroek * may be used to endorse or promote products derived from this software 18*83ee113eSDavid van Moolenbroek * without specific prior written permission. 19*83ee113eSDavid van Moolenbroek * 20*83ee113eSDavid van Moolenbroek * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21*83ee113eSDavid van Moolenbroek * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22*83ee113eSDavid van Moolenbroek * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23*83ee113eSDavid van Moolenbroek * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24*83ee113eSDavid van Moolenbroek * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25*83ee113eSDavid van Moolenbroek * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26*83ee113eSDavid van Moolenbroek * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27*83ee113eSDavid van Moolenbroek * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28*83ee113eSDavid van Moolenbroek * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29*83ee113eSDavid van Moolenbroek * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30*83ee113eSDavid van Moolenbroek * SUCH DAMAGE. 31*83ee113eSDavid van Moolenbroek * 32*83ee113eSDavid van Moolenbroek * @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93 33*83ee113eSDavid van Moolenbroek */ 34*83ee113eSDavid van Moolenbroek 35*83ee113eSDavid van Moolenbroek 36*83ee113eSDavid van Moolenbroek /* 37*83ee113eSDavid van Moolenbroek * Interface Control Message Protocol Definitions. 38*83ee113eSDavid van Moolenbroek * Per RFC 792, September 1981. 39*83ee113eSDavid van Moolenbroek */ 40*83ee113eSDavid van Moolenbroek 41*83ee113eSDavid van Moolenbroek /* 42*83ee113eSDavid van Moolenbroek * Internal of an ICMP Router Advertisement 43*83ee113eSDavid van Moolenbroek */ 44*83ee113eSDavid van Moolenbroek struct icmp_ra_addr { 45*83ee113eSDavid van Moolenbroek u_int32_t ira_addr; 46*83ee113eSDavid van Moolenbroek u_int32_t ira_preference; 47*83ee113eSDavid van Moolenbroek }; 48*83ee113eSDavid van Moolenbroek 49*83ee113eSDavid van Moolenbroek /* 50*83ee113eSDavid van Moolenbroek * Structure of an icmp header. 51*83ee113eSDavid van Moolenbroek */ 52*83ee113eSDavid van Moolenbroek struct icmp { 53*83ee113eSDavid van Moolenbroek u_int8_t icmp_type; /* type of message, see below */ 54*83ee113eSDavid van Moolenbroek u_int8_t icmp_code; /* type sub code */ 55*83ee113eSDavid van Moolenbroek u_int16_t icmp_cksum; /* ones complement cksum of struct */ 56*83ee113eSDavid van Moolenbroek union { 57*83ee113eSDavid van Moolenbroek u_int8_t ih_pptr; /* ICMP_PARAMPROB */ 58*83ee113eSDavid van Moolenbroek struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ 59*83ee113eSDavid van Moolenbroek struct ih_idseq { 60*83ee113eSDavid van Moolenbroek int16_t icd_id; 61*83ee113eSDavid van Moolenbroek int16_t icd_seq; 62*83ee113eSDavid van Moolenbroek } ih_idseq; 63*83ee113eSDavid van Moolenbroek int32_t ih_void; 64*83ee113eSDavid van Moolenbroek 65*83ee113eSDavid van Moolenbroek /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */ 66*83ee113eSDavid van Moolenbroek struct ih_pmtu { 67*83ee113eSDavid van Moolenbroek int16_t ipm_void; 68*83ee113eSDavid van Moolenbroek int16_t ipm_nextmtu; 69*83ee113eSDavid van Moolenbroek } ih_pmtu; 70*83ee113eSDavid van Moolenbroek struct ih_rtradv { 71*83ee113eSDavid van Moolenbroek u_int8_t irt_num_addrs; 72*83ee113eSDavid van Moolenbroek u_int8_t irt_wpa; 73*83ee113eSDavid van Moolenbroek u_int16_t irt_lifetime; 74*83ee113eSDavid van Moolenbroek } ih_rtradv; 75*83ee113eSDavid van Moolenbroek } icmp_hun; 76*83ee113eSDavid van Moolenbroek #define icmp_pptr icmp_hun.ih_pptr 77*83ee113eSDavid van Moolenbroek #define icmp_gwaddr icmp_hun.ih_gwaddr 78*83ee113eSDavid van Moolenbroek #define icmp_id icmp_hun.ih_idseq.icd_id 79*83ee113eSDavid van Moolenbroek #define icmp_seq icmp_hun.ih_idseq.icd_seq 80*83ee113eSDavid van Moolenbroek #define icmp_void icmp_hun.ih_void 81*83ee113eSDavid van Moolenbroek #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void 82*83ee113eSDavid van Moolenbroek #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu 83*83ee113eSDavid van Moolenbroek #define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs 84*83ee113eSDavid van Moolenbroek #define icmp_wpa icmp_hun.ih_rtradv.irt_wpa 85*83ee113eSDavid van Moolenbroek #define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime 86*83ee113eSDavid van Moolenbroek union { 87*83ee113eSDavid van Moolenbroek struct id_ts { 88*83ee113eSDavid van Moolenbroek u_int32_t its_otime; 89*83ee113eSDavid van Moolenbroek u_int32_t its_rtime; 90*83ee113eSDavid van Moolenbroek u_int32_t its_ttime; 91*83ee113eSDavid van Moolenbroek } id_ts; 92*83ee113eSDavid van Moolenbroek struct id_ip { 93*83ee113eSDavid van Moolenbroek struct ip idi_ip; 94*83ee113eSDavid van Moolenbroek /* options and then 64 bits of data */ 95*83ee113eSDavid van Moolenbroek } id_ip; 96*83ee113eSDavid van Moolenbroek struct icmp_ra_addr id_radv; 97*83ee113eSDavid van Moolenbroek u_int32_t id_mask; 98*83ee113eSDavid van Moolenbroek int8_t id_data[1]; 99*83ee113eSDavid van Moolenbroek } icmp_dun; 100*83ee113eSDavid van Moolenbroek #define icmp_otime icmp_dun.id_ts.its_otime 101*83ee113eSDavid van Moolenbroek #define icmp_rtime icmp_dun.id_ts.its_rtime 102*83ee113eSDavid van Moolenbroek #define icmp_ttime icmp_dun.id_ts.its_ttime 103*83ee113eSDavid van Moolenbroek #define icmp_ip icmp_dun.id_ip.idi_ip 104*83ee113eSDavid van Moolenbroek #define icmp_radv icmp_dun.id_mask 105*83ee113eSDavid van Moolenbroek #define icmp_mask icmp_dun.id_mask 106*83ee113eSDavid van Moolenbroek #define icmp_data icmp_dun.id_data 107*83ee113eSDavid van Moolenbroek }; 108*83ee113eSDavid van Moolenbroek 109*83ee113eSDavid van Moolenbroek /* 110*83ee113eSDavid van Moolenbroek * Lower bounds on packet lengths for various types. 111*83ee113eSDavid van Moolenbroek * For the error advice packets must first insure that the 112*83ee113eSDavid van Moolenbroek * packet is large enought to contain the returned ip header. 113*83ee113eSDavid van Moolenbroek * Only then can we do the check to see if 64 bits of packet 114*83ee113eSDavid van Moolenbroek * data have been returned, since we need to check the returned 115*83ee113eSDavid van Moolenbroek * ip header length. 116*83ee113eSDavid van Moolenbroek */ 117*83ee113eSDavid van Moolenbroek #define ICMP_MINLEN 8 /* abs minimum */ 118*83ee113eSDavid van Moolenbroek #define ICMP_TSLEN (8 + 3 * sizeof (u_int32_t)) /* timestamp */ 119*83ee113eSDavid van Moolenbroek #define ICMP_MASKLEN 12 /* address mask */ 120*83ee113eSDavid van Moolenbroek #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ 121*83ee113eSDavid van Moolenbroek #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) 122*83ee113eSDavid van Moolenbroek /* N.B.: must separately check that ip_hl >= 5 */ 123*83ee113eSDavid van Moolenbroek 124*83ee113eSDavid van Moolenbroek /* 125*83ee113eSDavid van Moolenbroek * Definition of type and code field values. 126*83ee113eSDavid van Moolenbroek */ 127*83ee113eSDavid van Moolenbroek #define ICMP_ECHOREPLY 0 /* echo reply */ 128*83ee113eSDavid van Moolenbroek #define ICMP_UNREACH 3 /* dest unreachable, codes: */ 129*83ee113eSDavid van Moolenbroek #define ICMP_UNREACH_NET 0 /* bad net */ 130*83ee113eSDavid van Moolenbroek #define ICMP_UNREACH_HOST 1 /* bad host */ 131*83ee113eSDavid van Moolenbroek #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ 132*83ee113eSDavid van Moolenbroek #define ICMP_UNREACH_PORT 3 /* bad port */ 133*83ee113eSDavid van Moolenbroek #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ 134*83ee113eSDavid van Moolenbroek #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ 135*83ee113eSDavid van Moolenbroek #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */ 136*83ee113eSDavid van Moolenbroek #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */ 137*83ee113eSDavid van Moolenbroek #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */ 138*83ee113eSDavid van Moolenbroek #define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */ 139*83ee113eSDavid van Moolenbroek #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */ 140*83ee113eSDavid van Moolenbroek #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */ 141*83ee113eSDavid van Moolenbroek #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */ 142*83ee113eSDavid van Moolenbroek #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ 143*83ee113eSDavid van Moolenbroek #define ICMP_REDIRECT 5 /* shorter route, codes: */ 144*83ee113eSDavid van Moolenbroek #define ICMP_REDIRECT_NET 0 /* for network */ 145*83ee113eSDavid van Moolenbroek #define ICMP_REDIRECT_HOST 1 /* for host */ 146*83ee113eSDavid van Moolenbroek #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ 147*83ee113eSDavid van Moolenbroek #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ 148*83ee113eSDavid van Moolenbroek #define ICMP_ECHO 8 /* echo service */ 149*83ee113eSDavid van Moolenbroek #define ICMP_ROUTERADVERT 9 /* router advertisement */ 150*83ee113eSDavid van Moolenbroek #define ICMP_ROUTERSOLICIT 10 /* router solicitation */ 151*83ee113eSDavid van Moolenbroek #define ICMP_TIMXCEED 11 /* time exceeded, code: */ 152*83ee113eSDavid van Moolenbroek #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ 153*83ee113eSDavid van Moolenbroek #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ 154*83ee113eSDavid van Moolenbroek #define ICMP_PARAMPROB 12 /* ip header bad */ 155*83ee113eSDavid van Moolenbroek #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */ 156*83ee113eSDavid van Moolenbroek #define ICMP_TSTAMP 13 /* timestamp request */ 157*83ee113eSDavid van Moolenbroek #define ICMP_TSTAMPREPLY 14 /* timestamp reply */ 158*83ee113eSDavid van Moolenbroek #define ICMP_IREQ 15 /* information request */ 159*83ee113eSDavid van Moolenbroek #define ICMP_IREQREPLY 16 /* information reply */ 160*83ee113eSDavid van Moolenbroek #define ICMP_MASKREQ 17 /* address mask request */ 161*83ee113eSDavid van Moolenbroek #define ICMP_MASKREPLY 18 /* address mask reply */ 162*83ee113eSDavid van Moolenbroek 163*83ee113eSDavid van Moolenbroek #define ICMP_MAXTYPE 18 164*83ee113eSDavid van Moolenbroek 165*83ee113eSDavid van Moolenbroek #define ICMP_INFOTYPE(type) \ 166*83ee113eSDavid van Moolenbroek ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ 167*83ee113eSDavid van Moolenbroek (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \ 168*83ee113eSDavid van Moolenbroek (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ 169*83ee113eSDavid van Moolenbroek (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ 170*83ee113eSDavid van Moolenbroek (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) 171*83ee113eSDavid van Moolenbroek 172*83ee113eSDavid van Moolenbroek #ifdef _KERNEL 173*83ee113eSDavid van Moolenbroek void icmp_error __P((struct mbuf *, int, int, n_long, struct ifnet *)); 174*83ee113eSDavid van Moolenbroek void icmp_input __P((struct mbuf *, ...)); 175*83ee113eSDavid van Moolenbroek void icmp_reflect __P((struct mbuf *)); 176*83ee113eSDavid van Moolenbroek void icmp_send __P((struct mbuf *, struct mbuf *)); 177*83ee113eSDavid van Moolenbroek int icmp_sysctl __P((int *, u_int, void *, size_t *, void *, size_t)); 178*83ee113eSDavid van Moolenbroek #endif 179*83ee113eSDavid van Moolenbroek 180