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1 /*
2 * Copyright (c) 1982, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
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.
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.
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 1.8 2006/05/20 02:42:12 dillon Exp $
38 #ifndef _NETINET_IP_ICMP_H_
39 #define _NETINET_IP_ICMP_H_
41 #ifndef _SYS_TYPES_H_
42 #include <sys/types.h>
43 #endif
44 #ifndef _NETINET_IN_SYSTM_H_
45 #include <netinet/in_systm.h>
46 #endif
47 #ifndef _NETINET_IN_H_
48 #include <netinet/in.h>
49 #endif
50 #ifndef _NETINET_IP_H_
51 #include <netinet/ip.h>
52 #endif
55 * Interface Control Message Protocol Definitions.
56 * Per RFC 792, September 1981.
60 * Internal of an ICMP Router Advertisement
62 struct icmp_ra_addr {
63 u_int32_t ira_addr;
64 u_int32_t ira_preference;
68 * Structure of an icmp header.
70 struct icmp {
71 u_char icmp_type; /* type of message, see below */
72 u_char icmp_code; /* type sub code */
73 u_short icmp_cksum; /* ones complement cksum of struct */
74 union {
75 u_char ih_pptr; /* ICMP_PARAMPROB */
76 struct in_addr ih_gwaddr; /* ICMP_REDIRECT */
77 struct ih_idseq {
78 n_short icd_id;
79 n_short icd_seq;
80 } ih_idseq;
81 int ih_void;
83 /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
84 struct ih_pmtu {
85 n_short ipm_void;
86 n_short ipm_nextmtu;
87 } ih_pmtu;
89 struct ih_rtradv {
90 u_char irt_num_addrs;
91 u_char irt_wpa;
92 u_int16_t irt_lifetime;
93 } ih_rtradv;
94 } icmp_hun;
95 #define icmp_pptr icmp_hun.ih_pptr
96 #define icmp_gwaddr icmp_hun.ih_gwaddr
97 #define icmp_id icmp_hun.ih_idseq.icd_id
98 #define icmp_seq icmp_hun.ih_idseq.icd_seq
99 #define icmp_void icmp_hun.ih_void
100 #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void
101 #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu
102 #define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs
103 #define icmp_wpa icmp_hun.ih_rtradv.irt_wpa
104 #define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime
105 union {
106 struct id_ts {
107 n_time its_otime;
108 n_time its_rtime;
109 n_time its_ttime;
110 } id_ts;
111 struct id_ip {
112 struct ip idi_ip;
113 /* options and then 64 bits of data */
114 } id_ip;
115 struct icmp_ra_addr id_radv;
116 u_int32_t id_mask;
117 char id_data[1];
118 } icmp_dun;
119 #define icmp_otime icmp_dun.id_ts.its_otime
120 #define icmp_rtime icmp_dun.id_ts.its_rtime
121 #define icmp_ttime icmp_dun.id_ts.its_ttime
122 #define icmp_ip icmp_dun.id_ip.idi_ip
123 #define icmp_radv icmp_dun.id_radv
124 #define icmp_mask icmp_dun.id_mask
125 #define icmp_data icmp_dun.id_data
129 * Lower bounds on packet lengths for various types.
130 * For the error advice packets must first insure that the
131 * packet is large enough to contain the returned ip header.
132 * Only then can we do the check to see if 64 bits of packet
133 * data have been returned, since we need to check the returned
134 * ip header length.
136 #define ICMP_MINLEN 8 /* abs minimum */
137 #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */
138 #define ICMP_MASKLEN 12 /* address mask */
139 #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */
140 #ifndef _IP_VHL
141 #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
142 /* N.B.: must separately check that ip_hl >= 5 */
143 #else
144 #define ICMP_ADVLEN(p) (8 + (IP_VHL_HL((p)->icmp_ip.ip_vhl) << 2) + 8)
145 /* N.B.: must separately check that header length >= 5 */
146 #endif
149 * Definition of type and code field values.
151 #define ICMP_ECHOREPLY 0 /* echo reply */
152 #define ICMP_UNREACH 3 /* dest unreachable, codes: */
153 #define ICMP_UNREACH_NET 0 /* bad net */
154 #define ICMP_UNREACH_HOST 1 /* bad host */
155 #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */
156 #define ICMP_UNREACH_PORT 3 /* bad port */
157 #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */
158 #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */
159 #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */
160 #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */
161 #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */
162 #define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */
163 #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */
164 #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */
165 #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */
166 #define ICMP_UNREACH_FILTER_PROHIB 13 /* admin prohib */
167 #define ICMP_UNREACH_HOST_PRECEDENCE 14 /* host prec vio. */
168 #define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* prec cutoff */
169 #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */
170 #define ICMP_REDIRECT 5 /* shorter route, codes: */
171 #define ICMP_REDIRECT_NET 0 /* for network */
172 #define ICMP_REDIRECT_HOST 1 /* for host */
173 #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */
174 #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */
175 #define ICMP_ALTHOSTADDR 6 /* alternate host address */
176 #define ICMP_ECHO 8 /* echo service */
177 #define ICMP_ROUTERADVERT 9 /* router advertisement */
178 #define ICMP_ROUTERADVERT_NORMAL 0 /* normal advertisement */
179 #define ICMP_ROUTERADVERT_NOROUTE_COMMON 16 /* selective routing */
180 #define ICMP_ROUTERSOLICIT 10 /* router solicitation */
181 #define ICMP_TIMXCEED 11 /* time exceeded, code: */
182 #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */
183 #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */
184 #define ICMP_PARAMPROB 12 /* ip header bad */
185 #define ICMP_PARAMPROB_ERRATPTR 0 /* error at param ptr */
186 #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */
187 #define ICMP_PARAMPROB_LENGTH 2 /* bad length */
188 #define ICMP_TSTAMP 13 /* timestamp request */
189 #define ICMP_TSTAMPREPLY 14 /* timestamp reply */
190 #define ICMP_IREQ 15 /* information request */
191 #define ICMP_IREQREPLY 16 /* information reply */
192 #define ICMP_MASKREQ 17 /* address mask request */
193 #define ICMP_MASKREPLY 18 /* address mask reply */
194 #define ICMP_TRACEROUTE 30 /* traceroute */
195 #define ICMP_DATACONVERR 31 /* data conversion error */
196 #define ICMP_MOBILE_REDIRECT 32 /* mobile host redirect */
197 #define ICMP_IPV6_WHEREAREYOU 33 /* IPv6 where-are-you */
198 #define ICMP_IPV6_IAMHERE 34 /* IPv6 i-am-here */
199 #define ICMP_MOBILE_REGREQUEST 35 /* mobile registration req */
200 #define ICMP_MOBILE_REGREPLY 36 /* mobile registreation reply */
201 #define ICMP_SKIP 39 /* SKIP */
202 #define ICMP_PHOTURIS 40 /* Photuris */
203 #define ICMP_PHOTURIS_UNKNOWN_INDEX 1 /* unknown sec index */
204 #define ICMP_PHOTURIS_AUTH_FAILED 2 /* auth failed */
205 #define ICMP_PHOTURIS_DECRYPT_FAILED 3 /* decrypt failed */
207 #define ICMP_MAXTYPE 40
209 #define ICMP_INFOTYPE(type) \
210 ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
211 (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \
212 (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
213 (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
214 (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
216 #ifdef _KERNEL
217 void icmp_error (struct mbuf *, int, int, n_long, int);
218 void icmp_input (struct mbuf *, ...);
219 int ip_next_mtu (int, int);
220 #endif
222 #endif