IA_PRF_RTEXISTOK is no longer needed, in_{add,scrub}prefix() does more
[dragonfly.git] / sys / netinet / ip_icmp.h
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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 $
1bd40720 35 * $DragonFly: src/sys/netinet/ip_icmp.h,v 1.8 2006/05/20 02:42:12 dillon Exp $
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36 */
37
38#ifndef _NETINET_IP_ICMP_H_
39#define _NETINET_IP_ICMP_H_
40
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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
53
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54/*
55 * Interface Control Message Protocol Definitions.
56 * Per RFC 792, September 1981.
57 */
58
59/*
60 * Internal of an ICMP Router Advertisement
61 */
62struct icmp_ra_addr {
63 u_int32_t ira_addr;
64 u_int32_t ira_preference;
65};
66
67/*
68 * Structure of an icmp header.
69 */
70struct 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;
82
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;
88
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
126};
127
128/*
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.
135 */
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
147
148/*
149 * Definition of type and code field values.
150 */
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 */
1caa4afc 175#define ICMP_ALTHOSTADDR 6 /* alternate host address */
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176#define ICMP_ECHO 8 /* echo service */
177#define ICMP_ROUTERADVERT 9 /* router advertisement */
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178#define ICMP_ROUTERADVERT_NORMAL 0 /* normal advertisement */
179#define ICMP_ROUTERADVERT_NOROUTE_COMMON 16 /* selective routing */
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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 */
1caa4afc 187#define ICMP_PARAMPROB_LENGTH 2 /* bad length */
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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 */
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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 */
984263bc 206
1caa4afc 207#define ICMP_MAXTYPE 40
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208
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)
215
216#ifdef _KERNEL
981773b8 217void icmp_error (struct mbuf *, int, int, n_long, int);
a00138cb 218void icmp_input (struct mbuf *, ...);
7d448528 219int ip_next_mtu (int, int);
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220#endif
221
222#endif