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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. 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 {
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 {
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;
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
struct icmp_ra_addr id_radv
Definition: ip_icmp.h:97
u_int16_t irt_lifetime
Definition: ip_icmp.h:74
union icmp::@408 icmp_hun
struct icmp::@408::ih_rtradv ih_rtradv
u_char icmp_type
Definition: ip_icmp.h:53
u_char icmp_code
Definition: ip_icmp.h:54
n_short ipm_void
Definition: ip_icmp.h:67
union icmp::@409 icmp_dun
struct icmp::@409::id_ip id_ip
Definition: ip_icmp.h:52
n_time its_rtime
Definition: ip_icmp.h:90
struct icmp::@409::id_ts id_ts
char id_data[1]
Definition: ip_icmp.h:99
u_int32_t id_mask
Definition: ip_icmp.h:98
n_time its_otime
Definition: ip_icmp.h:89
u_char ih_pptr
Definition: ip_icmp.h:57
Definition: dhcpd.h:61
Definition: tcpip.h:125
unsigned short u_short
Definition: types.h:81
unsigned short u_int16_t
Definition: rosdhcp.h:34
int ih_void
Definition: ip_icmp.h:63
unsigned int u_int32_t
Definition: rosdhcp.h:35
struct icmp::@408::ih_pmtu ih_pmtu
n_short icd_id
Definition: ip_icmp.h:60
u_char irt_wpa
Definition: ip_icmp.h:73
struct icmp::@408::ih_idseq ih_idseq
u_int32_t ira_preference
Definition: ip_icmp.h:46
n_short icd_seq
Definition: ip_icmp.h:61
struct ip idi_ip
Definition: ip_icmp.h:94
u_char irt_num_addrs
Definition: ip_icmp.h:72
n_short ipm_nextmtu
Definition: ip_icmp.h:68
u_int32_t ira_addr
Definition: ip_icmp.h:45
UCHAR u_char
Definition: types.h:80
#define __P(x)
Definition: various.h:10
struct in_addr ih_gwaddr
Definition: ip_icmp.h:58
n_time its_ttime
Definition: ip_icmp.h:91
u_short icmp_cksum
Definition: ip_icmp.h:55