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1.1 ! misho 1: /* $NetBSD: ip_icmp.h,v 1.11 1996/08/03 15:48:18 neil Exp $ */ ! 2: ! 3: /* ! 4: * Copyright (c) 1982, 1986, 1993 ! 5: * The Regents of the University of California. All rights reserved. ! 6: * ! 7: * Redistribution and use in source and binary forms, with or without ! 8: * modification, are permitted provided that the following conditions ! 9: * are met: ! 10: * 1. Redistributions of source code must retain the above copyright ! 11: * notice, this list of conditions and the following disclaimer. ! 12: * 2. Redistributions in binary form must reproduce the above copyright ! 13: * notice, this list of conditions and the following disclaimer in the ! 14: * documentation and/or other materials provided with the distribution. ! 15: * 3. All advertising materials mentioning features or use of this software ! 16: * must display the following acknowledgement: ! 17: * This product includes software developed by the University of ! 18: * California, Berkeley and its contributors. ! 19: * 4. Neither the name of the University nor the names of its contributors ! 20: * may be used to endorse or promote products derived from this software ! 21: * without specific prior written permission. ! 22: * ! 23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ! 24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE ! 25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ! 26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE ! 27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL ! 28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS ! 29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ! 30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT ! 31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY ! 32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF ! 33: * SUCH DAMAGE. ! 34: * ! 35: * @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93 ! 36: */ ! 37: ! 38: ! 39: /* ! 40: * Interface Control Message Protocol Definitions. ! 41: * Per RFC 792, September 1981. ! 42: */ ! 43: ! 44: /* ! 45: * Internal of an ICMP Router Advertisement ! 46: */ ! 47: struct icmp_ra_addr { ! 48: u_int32_t ira_addr; ! 49: u_int32_t ira_preference; ! 50: }; ! 51: ! 52: /* ! 53: * Structure of an icmp header. ! 54: */ ! 55: struct icmp { ! 56: u_int8_t icmp_type; /* type of message, see below */ ! 57: u_int8_t icmp_code; /* type sub code */ ! 58: u_int16_t icmp_cksum; /* ones complement cksum of struct */ ! 59: union { ! 60: u_int8_t ih_pptr; /* ICMP_PARAMPROB */ ! 61: struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ ! 62: struct ih_idseq { ! 63: int16_t icd_id; ! 64: int16_t icd_seq; ! 65: } ih_idseq; ! 66: int32_t ih_void; ! 67: ! 68: /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */ ! 69: struct ih_pmtu { ! 70: int16_t ipm_void; ! 71: int16_t ipm_nextmtu; ! 72: } ih_pmtu; ! 73: struct ih_rtradv { ! 74: u_int8_t irt_num_addrs; ! 75: u_int8_t irt_wpa; ! 76: u_int16_t irt_lifetime; ! 77: } ih_rtradv; ! 78: } icmp_hun; ! 79: #define icmp_pptr icmp_hun.ih_pptr ! 80: #define icmp_gwaddr icmp_hun.ih_gwaddr ! 81: #define icmp_id icmp_hun.ih_idseq.icd_id ! 82: #define icmp_seq icmp_hun.ih_idseq.icd_seq ! 83: #define icmp_void icmp_hun.ih_void ! 84: #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void ! 85: #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu ! 86: #define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs ! 87: #define icmp_wpa icmp_hun.ih_rtradv.irt_wpa ! 88: #define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime ! 89: union { ! 90: struct id_ts { ! 91: u_int32_t its_otime; ! 92: u_int32_t its_rtime; ! 93: u_int32_t 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: struct icmp_ra_addr id_radv; ! 100: u_int32_t id_mask; ! 101: int8_t id_data[1]; ! 102: } icmp_dun; ! 103: #define icmp_otime icmp_dun.id_ts.its_otime ! 104: #define icmp_rtime icmp_dun.id_ts.its_rtime ! 105: #define icmp_ttime icmp_dun.id_ts.its_ttime ! 106: #define icmp_ip icmp_dun.id_ip.idi_ip ! 107: #define icmp_radv icmp_dun.id_mask ! 108: #define icmp_mask icmp_dun.id_mask ! 109: #define icmp_data icmp_dun.id_data ! 110: }; ! 111: ! 112: /* ! 113: * Lower bounds on packet lengths for various types. ! 114: * For the error advice packets must first insure that the ! 115: * packet is large enought to contain the returned ip header. ! 116: * Only then can we do the check to see if 64 bits of packet ! 117: * data have been returned, since we need to check the returned ! 118: * ip header length. ! 119: */ ! 120: #define ICMP_MINLEN 8 /* abs minimum */ ! 121: #define ICMP_TSLEN (8 + 3 * sizeof (u_int32_t)) /* timestamp */ ! 122: #define ICMP_MASKLEN 12 /* address mask */ ! 123: #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ ! 124: #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) ! 125: /* N.B.: must separately check that ip_hl >= 5 */ ! 126: ! 127: /* ! 128: * Definition of type and code field values. ! 129: */ ! 130: #define ICMP_ECHOREPLY 0 /* echo reply */ ! 131: #define ICMP_UNREACH 3 /* dest unreachable, codes: */ ! 132: #define ICMP_UNREACH_NET 0 /* bad net */ ! 133: #define ICMP_UNREACH_HOST 1 /* bad host */ ! 134: #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ ! 135: #define ICMP_UNREACH_PORT 3 /* bad port */ ! 136: #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ ! 137: #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ ! 138: #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */ ! 139: #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */ ! 140: #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */ ! 141: #define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */ ! 142: #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */ ! 143: #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */ ! 144: #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */ ! 145: #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ ! 146: #define ICMP_REDIRECT 5 /* shorter route, codes: */ ! 147: #define ICMP_REDIRECT_NET 0 /* for network */ ! 148: #define ICMP_REDIRECT_HOST 1 /* for host */ ! 149: #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ ! 150: #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ ! 151: #define ICMP_ECHO 8 /* echo service */ ! 152: #define ICMP_ROUTERADVERT 9 /* router advertisement */ ! 153: #define ICMP_ROUTERSOLICIT 10 /* router solicitation */ ! 154: #define ICMP_TIMXCEED 11 /* time exceeded, code: */ ! 155: #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ ! 156: #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ ! 157: #define ICMP_PARAMPROB 12 /* ip header bad */ ! 158: #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */ ! 159: #define ICMP_TSTAMP 13 /* timestamp request */ ! 160: #define ICMP_TSTAMPREPLY 14 /* timestamp reply */ ! 161: #define ICMP_IREQ 15 /* information request */ ! 162: #define ICMP_IREQREPLY 16 /* information reply */ ! 163: #define ICMP_MASKREQ 17 /* address mask request */ ! 164: #define ICMP_MASKREPLY 18 /* address mask reply */ ! 165: ! 166: #define ICMP_MAXTYPE 18 ! 167: ! 168: #define ICMP_INFOTYPE(type) \ ! 169: ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ ! 170: (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \ ! 171: (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ ! 172: (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ ! 173: (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) ! 174: ! 175: #ifdef _KERNEL ! 176: void icmp_error __P((struct mbuf *, int, int, n_long, struct ifnet *)); ! 177: void icmp_input __P((struct mbuf *, ...)); ! 178: void icmp_reflect __P((struct mbuf *)); ! 179: void icmp_send __P((struct mbuf *, struct mbuf *)); ! 180: int icmp_sysctl __P((int *, u_int, void *, size_t *, void *, size_t)); ! 181: #endif ! 182: