Watt-32 tcp/ip  2.2 dev-rel.10
ip_icmp.h
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1 
5 /*
6  * Copyright (c) 1982, 1986, 1993
7  * The Regents of the University of California. All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  * notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  * notice, this list of conditions and the following disclaimer in the
16  * documentation and/or other materials provided with the distribution.
17  * 3. All advertising materials mentioning features or use of this software
18  * must display the following acknowledgement:
19  * This product includes software developed by the University of
20  * California, Berkeley and its contributors.
21  * 4. Neither the name of the University nor the names of its contributors
22  * may be used to endorse or promote products derived from this software
23  * without specific prior written permission.
24  *
25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28  * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35  * SUCH DAMAGE.
36  *
37  * @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93
38  * $Id: ip_icmp.h,v 1.9 1996/08/20 23:11:30 fenner Exp $
39  */
40 
41 #ifndef __NETINET_IP_ICMP_H
42 #define __NETINET_IP_ICMP_H
43 
44 #include <sys/pack_on.h>
45 
46 /*
47  * Interface Control Message Protocol Definitions.
48  * Per RFC 792, September 1981.
49  */
50 
51 /*
52  * Internal of an ICMP Router Advertisement
53  */
54 struct icmp_ra_addr {
55  u_int32_t ira_addr;
56  u_int32_t ira_preference;
57 };
58 
59 /*
60  * Structure of an icmp header.
61  */
62 struct icmp {
63  u_char icmp_type; /* type of message, see below */
64  u_char icmp_code; /* type sub code */
65  u_short icmp_cksum; /* ones complement cksum of struct */
66  union {
67  u_char ih_pptr; /* ICMP_PARAMPROB */
68  struct in_addr ih_gwaddr; /* ICMP_REDIRECT */
69  struct ih_idseq {
70  n_short icd_id;
71  n_short icd_seq;
72  } ih_idseq;
73  u_int32_t ih_void; /* was 'int' */
74 
75  /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
76  struct ih_pmtu {
77  n_short ipm_void;
78  n_short ipm_nextmtu;
79  } ih_pmtu;
80 
81  struct ih_rtradv {
82  u_char irt_num_addrs;
83  u_char irt_wpa;
84  u_int16_t irt_lifetime;
85  } ih_rtradv;
86  } icmp_hun;
87 #define icmp_pptr icmp_hun.ih_pptr
88 #define icmp_gwaddr icmp_hun.ih_gwaddr
89 #define icmp_id icmp_hun.ih_idseq.icd_id
90 #define icmp_seq icmp_hun.ih_idseq.icd_seq
91 #define icmp_void icmp_hun.ih_void
92 #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void
93 #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu
94 #define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs
95 #define icmp_wpa icmp_hun.ih_rtradv.irt_wpa
96 #define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime
97  union {
98  struct id_ts {
99  n_time its_otime;
100  n_time its_rtime;
101  n_time its_ttime;
102  } id_ts;
103  struct id_ip {
104  struct ip idi_ip;
105  /* options and then 64 bits of data */
106  } id_ip;
107  struct icmp_ra_addr id_radv;
108  u_long id_mask;
109  char id_data[1];
110  } icmp_dun;
111 #define icmp_otime icmp_dun.id_ts.its_otime
112 #define icmp_rtime icmp_dun.id_ts.its_rtime
113 #define icmp_ttime icmp_dun.id_ts.its_ttime
114 #define icmp_ip icmp_dun.id_ip.idi_ip
115 #define icmp_radv icmp_dun.id_radv
116 #define icmp_mask icmp_dun.id_mask
117 #define icmp_data icmp_dun.id_data
118 };
119 
120 #include <sys/pack_off.h>
121 
122 /*
123  * Lower bounds on packet lengths for various types.
124  * For the error advice packets must first insure that the
125  * packet is large enough to contain the returned ip header.
126  * Only then can we do the check to see if 64 bits of packet
127  * data have been returned, since we need to check the returned
128  * ip header length.
129  */
130 #define ICMP_MINLEN 8 /* abs minimum */
131 #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */
132 #define ICMP_MASKLEN 12 /* address mask */
133 #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */
134 #ifndef _IP_VHL
135 #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
136  /* N.B.: must separately check that ip_hl >= 5 */
137 #else
138 #define ICMP_ADVLEN(p) (8 + (IP_VHL_HL((p)->icmp_ip.ip_vhl) << 2) + 8)
139  /* N.B.: must separately check that header length >= 5 */
140 #endif
141 
142 /*
143  * Definition of type and code field values.
144  */
145 #define ICMP_ECHOREPLY 0 /* echo reply */
146 #define ICMP_UNREACH 3 /* dest unreachable, codes: */
147 #define ICMP_UNREACH_NET 0 /* bad net */
148 #define ICMP_UNREACH_HOST 1 /* bad host */
149 #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */
150 #define ICMP_UNREACH_PORT 3 /* bad port */
151 #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */
152 #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */
153 #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */
154 #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */
155 #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */
156 #define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */
157 #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */
158 #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */
159 #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */
160 #define ICMP_UNREACH_FILTER_PROHIB 13 /* admin prohib */
161 #define ICMP_UNREACH_HOST_PRECEDENCE 14 /* host prec vio. */
162 #define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* prec cutoff */
163 #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */
164 #define ICMP_REDIRECT 5 /* shorter route, codes: */
165 #define ICMP_REDIRECT_NET 0 /* for network */
166 #define ICMP_REDIRECT_HOST 1 /* for host */
167 #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */
168 #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */
169 #define ICMP_ECHO 8 /* echo service */
170 #define ICMP_ROUTERADVERT 9 /* router advertisement */
171 #define ICMP_ROUTERSOLICIT 10 /* router solicitation */
172 #define ICMP_TIMXCEED 11 /* time exceeded, code: */
173 #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */
174 #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */
175 #define ICMP_PARAMPROB 12 /* ip header bad */
176 #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */
177 #define ICMP_TSTAMP 13 /* timestamp request */
178 #define ICMP_TSTAMPREPLY 14 /* timestamp reply */
179 #define ICMP_IREQ 15 /* information request */
180 #define ICMP_IREQREPLY 16 /* information reply */
181 #define ICMP_MASKREQ 17 /* address mask request */
182 #define ICMP_MASKREPLY 18 /* address mask reply */
183 
184 #ifndef ICMP_MAXTYPE
185 #define ICMP_MAXTYPE 18
186 #endif
187 
188 #define ICMP_INFOTYPE(type) \
189  ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
190  (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \
191  (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
192  (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
193  (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
194 
195 #endif
Definition: ip_icmp.h:62
Definition: ip.h:67
Definition: in.h:146