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: src/sys/netinet/ip_icmp.h,v 1.16 1999/12/29 04:41:01 peter Exp $ 35 * $DragonFly: src/sys/netinet/ip_icmp.h,v 1.7 2005/10/28 15:56:47 liamfoy Exp $ 36 */ 37 38 #ifndef _NETINET_IP_ICMP_H_ 39 #define _NETINET_IP_ICMP_H_ 40 41 /* 42 * Interface Control Message Protocol Definitions. 43 * Per RFC 792, September 1981. 44 */ 45 46 /* 47 * Internal of an ICMP Router Advertisement 48 */ 49 struct icmp_ra_addr { 50 u_int32_t ira_addr; 51 u_int32_t ira_preference; 52 }; 53 54 /* 55 * Structure of an icmp header. 56 */ 57 struct icmp { 58 u_char icmp_type; /* type of message, see below */ 59 u_char icmp_code; /* type sub code */ 60 u_short icmp_cksum; /* ones complement cksum of struct */ 61 union { 62 u_char ih_pptr; /* ICMP_PARAMPROB */ 63 struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ 64 struct ih_idseq { 65 n_short icd_id; 66 n_short icd_seq; 67 } ih_idseq; 68 int ih_void; 69 70 /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */ 71 struct ih_pmtu { 72 n_short ipm_void; 73 n_short ipm_nextmtu; 74 } ih_pmtu; 75 76 struct ih_rtradv { 77 u_char irt_num_addrs; 78 u_char irt_wpa; 79 u_int16_t irt_lifetime; 80 } ih_rtradv; 81 } icmp_hun; 82 #define icmp_pptr icmp_hun.ih_pptr 83 #define icmp_gwaddr icmp_hun.ih_gwaddr 84 #define icmp_id icmp_hun.ih_idseq.icd_id 85 #define icmp_seq icmp_hun.ih_idseq.icd_seq 86 #define icmp_void icmp_hun.ih_void 87 #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void 88 #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu 89 #define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs 90 #define icmp_wpa icmp_hun.ih_rtradv.irt_wpa 91 #define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime 92 union { 93 struct id_ts { 94 n_time its_otime; 95 n_time its_rtime; 96 n_time its_ttime; 97 } id_ts; 98 struct id_ip { 99 struct ip idi_ip; 100 /* options and then 64 bits of data */ 101 } id_ip; 102 struct icmp_ra_addr id_radv; 103 u_int32_t id_mask; 104 char id_data[1]; 105 } icmp_dun; 106 #define icmp_otime icmp_dun.id_ts.its_otime 107 #define icmp_rtime icmp_dun.id_ts.its_rtime 108 #define icmp_ttime icmp_dun.id_ts.its_ttime 109 #define icmp_ip icmp_dun.id_ip.idi_ip 110 #define icmp_radv icmp_dun.id_radv 111 #define icmp_mask icmp_dun.id_mask 112 #define icmp_data icmp_dun.id_data 113 }; 114 115 /* 116 * Lower bounds on packet lengths for various types. 117 * For the error advice packets must first insure that the 118 * packet is large enough to contain the returned ip header. 119 * Only then can we do the check to see if 64 bits of packet 120 * data have been returned, since we need to check the returned 121 * ip header length. 122 */ 123 #define ICMP_MINLEN 8 /* abs minimum */ 124 #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */ 125 #define ICMP_MASKLEN 12 /* address mask */ 126 #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ 127 #ifndef _IP_VHL 128 #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) 129 /* N.B.: must separately check that ip_hl >= 5 */ 130 #else 131 #define ICMP_ADVLEN(p) (8 + (IP_VHL_HL((p)->icmp_ip.ip_vhl) << 2) + 8) 132 /* N.B.: must separately check that header length >= 5 */ 133 #endif 134 135 /* 136 * Definition of type and code field values. 137 */ 138 #define ICMP_ECHOREPLY 0 /* echo reply */ 139 #define ICMP_UNREACH 3 /* dest unreachable, codes: */ 140 #define ICMP_UNREACH_NET 0 /* bad net */ 141 #define ICMP_UNREACH_HOST 1 /* bad host */ 142 #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ 143 #define ICMP_UNREACH_PORT 3 /* bad port */ 144 #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ 145 #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ 146 #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */ 147 #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */ 148 #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */ 149 #define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */ 150 #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */ 151 #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */ 152 #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */ 153 #define ICMP_UNREACH_FILTER_PROHIB 13 /* admin prohib */ 154 #define ICMP_UNREACH_HOST_PRECEDENCE 14 /* host prec vio. */ 155 #define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* prec cutoff */ 156 #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ 157 #define ICMP_REDIRECT 5 /* shorter route, codes: */ 158 #define ICMP_REDIRECT_NET 0 /* for network */ 159 #define ICMP_REDIRECT_HOST 1 /* for host */ 160 #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ 161 #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ 162 #define ICMP_ALTHOSTADDR 6 /* alternate host address */ 163 #define ICMP_ECHO 8 /* echo service */ 164 #define ICMP_ROUTERADVERT 9 /* router advertisement */ 165 #define ICMP_ROUTERADVERT_NORMAL 0 /* normal advertisement */ 166 #define ICMP_ROUTERADVERT_NOROUTE_COMMON 16 /* selective routing */ 167 #define ICMP_ROUTERSOLICIT 10 /* router solicitation */ 168 #define ICMP_TIMXCEED 11 /* time exceeded, code: */ 169 #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ 170 #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ 171 #define ICMP_PARAMPROB 12 /* ip header bad */ 172 #define ICMP_PARAMPROB_ERRATPTR 0 /* error at param ptr */ 173 #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */ 174 #define ICMP_PARAMPROB_LENGTH 2 /* bad length */ 175 #define ICMP_TSTAMP 13 /* timestamp request */ 176 #define ICMP_TSTAMPREPLY 14 /* timestamp reply */ 177 #define ICMP_IREQ 15 /* information request */ 178 #define ICMP_IREQREPLY 16 /* information reply */ 179 #define ICMP_MASKREQ 17 /* address mask request */ 180 #define ICMP_MASKREPLY 18 /* address mask reply */ 181 #define ICMP_TRACEROUTE 30 /* traceroute */ 182 #define ICMP_DATACONVERR 31 /* data conversion error */ 183 #define ICMP_MOBILE_REDIRECT 32 /* mobile host redirect */ 184 #define ICMP_IPV6_WHEREAREYOU 33 /* IPv6 where-are-you */ 185 #define ICMP_IPV6_IAMHERE 34 /* IPv6 i-am-here */ 186 #define ICMP_MOBILE_REGREQUEST 35 /* mobile registration req */ 187 #define ICMP_MOBILE_REGREPLY 36 /* mobile registreation reply */ 188 #define ICMP_SKIP 39 /* SKIP */ 189 #define ICMP_PHOTURIS 40 /* Photuris */ 190 #define ICMP_PHOTURIS_UNKNOWN_INDEX 1 /* unknown sec index */ 191 #define ICMP_PHOTURIS_AUTH_FAILED 2 /* auth failed */ 192 #define ICMP_PHOTURIS_DECRYPT_FAILED 3 /* decrypt failed */ 193 194 #define ICMP_MAXTYPE 40 195 196 #define ICMP_INFOTYPE(type) \ 197 ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ 198 (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \ 199 (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ 200 (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ 201 (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) 202 203 #ifdef _KERNEL 204 void icmp_error (struct mbuf *, int, int, n_long, int); 205 void icmp_input (struct mbuf *, ...); 206 int ip_next_mtu (int, int); 207 #endif 208 209 #endif 210