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. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93
30 * $FreeBSD: src/sys/netinet/ip_icmp.h,v 1.13 1999/08/28 00:49:24 peter Exp $
31 */
32
33 #ifndef _NETINET_IP_ICMP_H_
34 #define _NETINET_IP_ICMP_H_
35
36 /*
37 * Interface Control Message Protocol Definitions.
38 * Per RFC 792, September 1981.
39 */
40
41 /*
42 * Internal of an ICMP Router Advertisement
43 */
44 struct icmp_ra_addr {
45 u_int32_t ira_addr;
46 u_int32_t ira_preference;
47 };
48
49 /*
50 * Structure of an icmp header.
51 */
52 struct icmp {
53 u_char icmp_type; /* type of message, see below */
54 u_char icmp_code; /* type sub code */
55 u_short icmp_cksum; /* ones complement cksum of struct */
56 union {
57 u_char ih_pptr; /* ICMP_PARAMPROB */
58 struct in_addr ih_gwaddr; /* ICMP_REDIRECT */
59 struct ih_idseq {
60 n_short icd_id;
61 n_short icd_seq;
62 } ih_idseq;
63 int ih_void;
64
65 /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
66 struct ih_pmtu {
67 n_short ipm_void;
68 n_short ipm_nextmtu;
69 } ih_pmtu;
70
71 struct ih_rtradv {
72 u_char irt_num_addrs;
73 u_char irt_wpa;
74 u_int16_t irt_lifetime;
75 } ih_rtradv;
76 } icmp_hun;
77 #define icmp_pptr icmp_hun.ih_pptr
78 #define icmp_gwaddr icmp_hun.ih_gwaddr
79 #define icmp_id icmp_hun.ih_idseq.icd_id
80 #define icmp_seq icmp_hun.ih_idseq.icd_seq
81 #define icmp_void icmp_hun.ih_void
82 #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void
83 #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu
84 #define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs
85 #define icmp_wpa icmp_hun.ih_rtradv.irt_wpa
86 #define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime
87 union {
88 struct id_ts {
89 n_time its_otime;
90 n_time its_rtime;
91 n_time its_ttime;
92 } id_ts;
93 struct id_ip {
94 struct ip idi_ip;
95 /* options and then 64 bits of data */
96 } id_ip;
97 struct icmp_ra_addr id_radv;
98 u_int32_t id_mask;
99 char id_data[1];
100 } icmp_dun;
101 #define icmp_otime icmp_dun.id_ts.its_otime
102 #define icmp_rtime icmp_dun.id_ts.its_rtime
103 #define icmp_ttime icmp_dun.id_ts.its_ttime
104 #define icmp_ip icmp_dun.id_ip.idi_ip
105 #define icmp_radv icmp_dun.id_radv
106 #define icmp_mask icmp_dun.id_mask
107 #define icmp_data icmp_dun.id_data
108 };
109
110 /*
111 * Lower bounds on packet lengths for various types.
112 * For the error advice packets must first insure that the
113 * packet is large enough to contain the returned ip header.
114 * Only then can we do the check to see if 64 bits of packet
115 * data have been returned, since we need to check the returned
116 * ip header length.
117 */
118 #define ICMP_MINLEN 8 /* abs minimum */
119 #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */
120 #define ICMP_MASKLEN 12 /* address mask */
121 #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */
122 #ifndef _IP_VHL
123 #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
124 /* N.B.: must separately check that ip_hl >= 5 */
125 #else
126 #define ICMP_ADVLEN(p) (8 + (IP_VHL_HL((p)->icmp_ip.ip_vhl) << 2) + 8)
127 /* N.B.: must separately check that header length >= 5 */
128 #endif
129
130 /*
131 * Definition of type and code field values.
132 */
133 #define ICMP_ECHOREPLY 0 /* echo reply */
134 #define ICMP_UNREACH 3 /* dest unreachable, codes: */
135 #define ICMP_UNREACH_NET 0 /* bad net */
136 #define ICMP_UNREACH_HOST 1 /* bad host */
137 #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */
138 #define ICMP_UNREACH_PORT 3 /* bad port */
139 #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */
140 #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */
141 #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */
142 #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */
143 #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */
144 #define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */
145 #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */
146 #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */
147 #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */
148 #define ICMP_UNREACH_FILTER_PROHIB 13 /* admin prohib */
149 #define ICMP_UNREACH_HOST_PRECEDENCE 14 /* host prec vio. */
150 #define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* prec cutoff */
151 #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */
152 #define ICMP_REDIRECT 5 /* shorter route, codes: */
153 #define ICMP_REDIRECT_NET 0 /* for network */
154 #define ICMP_REDIRECT_HOST 1 /* for host */
155 #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */
156 #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */
157 #define ICMP_ECHO 8 /* echo service */
158 #define ICMP_ROUTERADVERT 9 /* router advertisement */
159 #define ICMP_ROUTERSOLICIT 10 /* router solicitation */
160 #define ICMP_TIMXCEED 11 /* time exceeded, code: */
161 #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */
162 #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */
163 #define ICMP_PARAMPROB 12 /* ip header bad */
164 #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */
165 #define ICMP_TSTAMP 13 /* timestamp request */
166 #define ICMP_TSTAMPREPLY 14 /* timestamp reply */
167 #define ICMP_IREQ 15 /* information request */
168 #define ICMP_IREQREPLY 16 /* information reply */
169 #define ICMP_MASKREQ 17 /* address mask request */
170 #define ICMP_MASKREPLY 18 /* address mask reply */
171
172 #define ICMP_MAXTYPE 18
173
174 #define ICMP_INFOTYPE(type) \
175 ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
176 (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \
177 (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
178 (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
179 (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
180
181 #ifdef KERNEL
182 void icmp_error __P((struct mbuf *, int, int, n_long, struct ifnet *));
183 void icmp_input __P((struct mbuf *, int));
184 #endif
185
186 #endif
187
This page was automatically generated by the
LXR engine.
Visit the LXR main site for more
information.