ISC DHCP 4.4.3-P1
A reference DHCPv4 and DHCPv6 implementation
 
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ip_icmp.h
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1/* $NetBSD: ip_icmp.h,v 1.11 1996/08/03 15:48:18 neil Exp $ */
2
3/*
4 * Copyright (c) 1982, 1986, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93
32 */
33
34
35/*
36 * Interface Control Message Protocol Definitions.
37 * Per RFC 792, September 1981.
38 */
39
40/*
41 * Internal of an ICMP Router Advertisement
42 */
44 u_int32_t ira_addr;
45 u_int32_t ira_preference;
46};
47
48/*
49 * Structure of an icmp header.
50 */
51struct icmp {
52 u_int8_t icmp_type; /* type of message, see below */
53 u_int8_t icmp_code; /* type sub code */
54 u_int16_t icmp_cksum; /* ones complement cksum of struct */
55 union {
56 u_int8_t ih_pptr; /* ICMP_PARAMPROB */
57 struct in_addr ih_gwaddr; /* ICMP_REDIRECT */
58 struct ih_idseq {
59 int16_t icd_id;
60 int16_t icd_seq;
62 int32_t ih_void;
63
64 /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
65 struct ih_pmtu {
66 int16_t ipm_void;
67 int16_t ipm_nextmtu;
69 struct ih_rtradv {
70 u_int8_t irt_num_addrs;
71 u_int8_t irt_wpa;
72 u_int16_t irt_lifetime;
75#define icmp_pptr icmp_hun.ih_pptr
76#define icmp_gwaddr icmp_hun.ih_gwaddr
77#define icmp_id icmp_hun.ih_idseq.icd_id
78#define icmp_seq icmp_hun.ih_idseq.icd_seq
79#define icmp_void icmp_hun.ih_void
80#define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void
81#define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu
82#define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs
83#define icmp_wpa icmp_hun.ih_rtradv.irt_wpa
84#define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime
85 union {
86 struct id_ts {
87 u_int32_t its_otime;
88 u_int32_t its_rtime;
89 u_int32_t its_ttime;
91 struct id_ip {
92 struct ip idi_ip;
93 /* options and then 64 bits of data */
96 u_int32_t id_mask;
97 int8_t id_data[1];
99#define icmp_otime icmp_dun.id_ts.its_otime
100#define icmp_rtime icmp_dun.id_ts.its_rtime
101#define icmp_ttime icmp_dun.id_ts.its_ttime
102#define icmp_ip icmp_dun.id_ip.idi_ip
103#define icmp_radv icmp_dun.id_mask
104#define icmp_mask icmp_dun.id_mask
105#define icmp_data icmp_dun.id_data
106};
107
108/*
109 * Lower bounds on packet lengths for various types.
110 * For the error advice packets must first insure that the
111 * packet is large enought to contain the returned ip header.
112 * Only then can we do the check to see if 64 bits of packet
113 * data have been returned, since we need to check the returned
114 * ip header length.
115 */
116#define ICMP_MINLEN 8 /* abs minimum */
117#define ICMP_TSLEN (8 + 3 * sizeof (u_int32_t)) /* timestamp */
118#define ICMP_MASKLEN 12 /* address mask */
119#define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */
120#define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
121 /* N.B.: must separately check that ip_hl >= 5 */
122
123/*
124 * Definition of type and code field values.
125 */
126#define ICMP_ECHOREPLY 0 /* echo reply */
127#define ICMP_UNREACH 3 /* dest unreachable, codes: */
128#define ICMP_UNREACH_NET 0 /* bad net */
129#define ICMP_UNREACH_HOST 1 /* bad host */
130#define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */
131#define ICMP_UNREACH_PORT 3 /* bad port */
132#define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */
133#define ICMP_UNREACH_SRCFAIL 5 /* src route failed */
134#define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */
135#define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */
136#define ICMP_UNREACH_ISOLATED 8 /* src host isolated */
137#define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */
138#define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */
139#define ICMP_UNREACH_TOSNET 11 /* bad tos for net */
140#define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */
141#define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */
142#define ICMP_REDIRECT 5 /* shorter route, codes: */
143#define ICMP_REDIRECT_NET 0 /* for network */
144#define ICMP_REDIRECT_HOST 1 /* for host */
145#define ICMP_REDIRECT_TOSNET 2 /* for tos and net */
146#define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */
147#define ICMP_ECHO 8 /* echo service */
148#define ICMP_ROUTERADVERT 9 /* router advertisement */
149#define ICMP_ROUTERSOLICIT 10 /* router solicitation */
150#define ICMP_TIMXCEED 11 /* time exceeded, code: */
151#define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */
152#define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */
153#define ICMP_PARAMPROB 12 /* ip header bad */
154#define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */
155#define ICMP_TSTAMP 13 /* timestamp request */
156#define ICMP_TSTAMPREPLY 14 /* timestamp reply */
157#define ICMP_IREQ 15 /* information request */
158#define ICMP_IREQREPLY 16 /* information reply */
159#define ICMP_MASKREQ 17 /* address mask request */
160#define ICMP_MASKREPLY 18 /* address mask reply */
161
162#define ICMP_MAXTYPE 18
163
164#define ICMP_INFOTYPE(type) \
165 ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
166 (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \
167 (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
168 (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
169 (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
170
171#ifdef _KERNEL
172void icmp_error __P((struct mbuf *, int, int, n_long, struct ifnet *));
173void icmp_input __P((struct mbuf *, ...));
174void icmp_reflect __P((struct mbuf *));
175void icmp_send __P((struct mbuf *, struct mbuf *));
176int icmp_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
177#endif
178
u_int32_t ira_addr
Definition ip_icmp.h:44
u_int32_t ira_preference
Definition ip_icmp.h:45
Definition ip_icmp.h:51
union icmp::@055327302121250062367031104102131235246351226340 icmp_hun
struct icmp::@270231021253362017333165244027160240034037157104::id_ip id_ip
int8_t id_data[1]
Definition ip_icmp.h:97
u_int32_t its_otime
Definition ip_icmp.h:87
u_int32_t its_ttime
Definition ip_icmp.h:89
int32_t ih_void
Definition ip_icmp.h:62
u_int8_t irt_wpa
Definition ip_icmp.h:71
int16_t icd_id
Definition ip_icmp.h:59
int16_t ipm_nextmtu
Definition ip_icmp.h:67
union icmp::@270231021253362017333165244027160240034037157104 icmp_dun
u_int16_t irt_lifetime
Definition ip_icmp.h:72
struct icmp_ra_addr id_radv
Definition ip_icmp.h:95
struct in_addr ih_gwaddr
Definition ip_icmp.h:57
struct icmp::@055327302121250062367031104102131235246351226340::ih_rtradv ih_rtradv
struct icmp::@055327302121250062367031104102131235246351226340::ih_idseq ih_idseq
u_int8_t ih_pptr
Definition ip_icmp.h:56
struct icmp::@055327302121250062367031104102131235246351226340::ih_pmtu ih_pmtu
u_int32_t id_mask
Definition ip_icmp.h:96
int16_t icd_seq
Definition ip_icmp.h:60
struct icmp::@270231021253362017333165244027160240034037157104::id_ts id_ts
u_int16_t icmp_cksum
Definition ip_icmp.h:54
u_int8_t icmp_code
Definition ip_icmp.h:53
u_int8_t icmp_type
Definition ip_icmp.h:52
u_int8_t irt_num_addrs
Definition ip_icmp.h:70
int16_t ipm_void
Definition ip_icmp.h:66
struct ip idi_ip
Definition ip_icmp.h:92
u_int32_t its_rtime
Definition ip_icmp.h:88
Definition ip.h:47