ip_icmp.h revision 55009
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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93 34 * $FreeBSD: head/sys/netinet/ip_icmp.h 55009 1999-12-22 19:13:38Z shin $ 35 */ 36 37#ifndef _NETINET_IP_ICMP_H_ 38#define _NETINET_IP_ICMP_H_ 39 40/* 41 * Interface Control Message Protocol Definitions. 42 * Per RFC 792, September 1981. 43 */ 44 45/* 46 * Internal of an ICMP Router Advertisement 47 */ 48struct icmp_ra_addr { 49 u_int32_t ira_addr; 50 u_int32_t ira_preference; 51}; 52 53/* 54 * Structure of an icmp header. 55 */ 56struct icmp { 57 u_char icmp_type; /* type of message, see below */ 58 u_char icmp_code; /* type sub code */ 59 u_short icmp_cksum; /* ones complement cksum of struct */ 60 union { 61 u_char ih_pptr; /* ICMP_PARAMPROB */ 62 struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ 63 struct ih_idseq { 64 n_short icd_id; 65 n_short icd_seq; 66 } ih_idseq; 67 int ih_void; 68 69 /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */ 70 struct ih_pmtu { 71 n_short ipm_void; 72 n_short ipm_nextmtu; 73 } ih_pmtu; 74 75 struct ih_rtradv { 76 u_char irt_num_addrs; 77 u_char irt_wpa; 78 u_int16_t irt_lifetime; 79 } ih_rtradv; 80 } icmp_hun; 81#define icmp_pptr icmp_hun.ih_pptr 82#define icmp_gwaddr icmp_hun.ih_gwaddr 83#define icmp_id icmp_hun.ih_idseq.icd_id 84#define icmp_seq icmp_hun.ih_idseq.icd_seq 85#define icmp_void icmp_hun.ih_void 86#define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void 87#define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu 88#define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs 89#define icmp_wpa icmp_hun.ih_rtradv.irt_wpa 90#define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime 91 union { 92 struct id_ts { 93 n_time its_otime; 94 n_time its_rtime; 95 n_time its_ttime; 96 } id_ts; 97 struct id_ip { 98 struct ip idi_ip; 99 /* options and then 64 bits of data */ 100 } id_ip; 101 struct icmp_ra_addr id_radv; 102 u_int32_t id_mask; 103 char id_data[1]; 104 } icmp_dun; 105#define icmp_otime icmp_dun.id_ts.its_otime 106#define icmp_rtime icmp_dun.id_ts.its_rtime 107#define icmp_ttime icmp_dun.id_ts.its_ttime 108#define icmp_ip icmp_dun.id_ip.idi_ip 109#define icmp_radv icmp_dun.id_radv 110#define icmp_mask icmp_dun.id_mask 111#define icmp_data icmp_dun.id_data 112}; 113 114/* 115 * Lower bounds on packet lengths for various types. 116 * For the error advice packets must first insure that the 117 * packet is large enough to contain the returned ip header. 118 * Only then can we do the check to see if 64 bits of packet 119 * data have been returned, since we need to check the returned 120 * ip header length. 121 */ 122#define ICMP_MINLEN 8 /* abs minimum */ 123#define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */ 124#define ICMP_MASKLEN 12 /* address mask */ 125#define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ 126#ifndef _IP_VHL 127#define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) 128 /* N.B.: must separately check that ip_hl >= 5 */ 129#else 130#define ICMP_ADVLEN(p) (8 + (IP_VHL_HL((p)->icmp_ip.ip_vhl) << 2) + 8) 131 /* N.B.: must separately check that header length >= 5 */ 132#endif 133 134/* 135 * Definition of type and code field values. 136 */ 137#define ICMP_ECHOREPLY 0 /* echo reply */ 138#define ICMP_UNREACH 3 /* dest unreachable, codes: */ 139#define ICMP_UNREACH_NET 0 /* bad net */ 140#define ICMP_UNREACH_HOST 1 /* bad host */ 141#define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ 142#define ICMP_UNREACH_PORT 3 /* bad port */ 143#define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ 144#define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ 145#define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */ 146#define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */ 147#define ICMP_UNREACH_ISOLATED 8 /* src host isolated */ 148#define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */ 149#define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */ 150#define ICMP_UNREACH_TOSNET 11 /* bad tos for net */ 151#define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */ 152#define ICMP_UNREACH_FILTER_PROHIB 13 /* admin prohib */ 153#define ICMP_UNREACH_HOST_PRECEDENCE 14 /* host prec vio. */ 154#define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* prec cutoff */ 155#define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ 156#define ICMP_REDIRECT 5 /* shorter route, codes: */ 157#define ICMP_REDIRECT_NET 0 /* for network */ 158#define ICMP_REDIRECT_HOST 1 /* for host */ 159#define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ 160#define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ 161#define ICMP_ECHO 8 /* echo service */ 162#define ICMP_ROUTERADVERT 9 /* router advertisement */ 163#define ICMP_ROUTERSOLICIT 10 /* router solicitation */ 164#define ICMP_TIMXCEED 11 /* time exceeded, code: */ 165#define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ 166#define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ 167#define ICMP_PARAMPROB 12 /* ip header bad */ 168#define ICMP_PARAMPROB_ERRATPTR 0 /* error at param ptr */ 169#define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */ 170#define ICMP_PARAMPROB_LENGTH 2 /* bad length */ 171#define ICMP_TSTAMP 13 /* timestamp request */ 172#define ICMP_TSTAMPREPLY 14 /* timestamp reply */ 173#define ICMP_IREQ 15 /* information request */ 174#define ICMP_IREQREPLY 16 /* information reply */ 175#define ICMP_MASKREQ 17 /* address mask request */ 176#define ICMP_MASKREPLY 18 /* address mask reply */ 177 178#define ICMP_MAXTYPE 18 179 180#define ICMP_INFOTYPE(type) \ 181 ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ 182 (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \ 183 (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ 184 (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ 185 (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) 186 187#ifdef KERNEL 188void icmp_error __P((struct mbuf *, int, int, n_long, struct ifnet *)); 189void icmp_input __P((struct mbuf *, int, int)); 190#endif 191 192#endif 193