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15637ed4 RG |
1 | /* |
2 | * Copyright (c) 1982, 1986 Regents of the University of California. | |
3 | * 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 | * | |
38e82238 | 33 | * from: @(#)ip_icmp.h 7.5 (Berkeley) 6/28/90 |
2cb63509 | 34 | * $Id: ip_icmp.h,v 1.3 1993/11/07 17:47:57 wollman Exp $ |
15637ed4 RG |
35 | */ |
36 | ||
8ace4366 GW |
37 | #ifndef _NETINET_IP_ICMP_H_ |
38 | #define _NETINET_IP_ICMP_H_ 1 | |
39 | ||
15637ed4 RG |
40 | /* |
41 | * Interface Control Message Protocol Definitions. | |
42 | * Per RFC 792, September 1981. | |
43 | */ | |
44 | ||
45 | /* | |
46 | * Structure of an icmp header. | |
47 | */ | |
48 | struct icmp { | |
49 | u_char icmp_type; /* type of message, see below */ | |
50 | u_char icmp_code; /* type sub code */ | |
51 | u_short icmp_cksum; /* ones complement cksum of struct */ | |
52 | union { | |
53 | u_char ih_pptr; /* ICMP_PARAMPROB */ | |
54 | struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ | |
55 | struct ih_idseq { | |
56 | n_short icd_id; | |
57 | n_short icd_seq; | |
58 | } ih_idseq; | |
2cb63509 GW |
59 | struct ih_mtu { |
60 | n_short imt_unused; | |
61 | n_short imt_nhmtu; | |
62 | } ih_mtu; | |
15637ed4 RG |
63 | int ih_void; |
64 | } icmp_hun; | |
65 | #define icmp_pptr icmp_hun.ih_pptr | |
66 | #define icmp_gwaddr icmp_hun.ih_gwaddr | |
67 | #define icmp_id icmp_hun.ih_idseq.icd_id | |
68 | #define icmp_seq icmp_hun.ih_idseq.icd_seq | |
69 | #define icmp_void icmp_hun.ih_void | |
2cb63509 GW |
70 | #define icmp_mtu icmp_hun.ih_mtu.imt_nhmtu |
71 | #define icmp_mtuvoid icmp_hun.ih_mtu.imt_unused | |
15637ed4 RG |
72 | union { |
73 | struct id_ts { | |
74 | n_time its_otime; | |
75 | n_time its_rtime; | |
76 | n_time its_ttime; | |
77 | } id_ts; | |
78 | struct id_ip { | |
79 | struct ip idi_ip; | |
80 | /* options and then 64 bits of data */ | |
81 | } id_ip; | |
82 | u_long id_mask; | |
83 | char id_data[1]; | |
84 | } icmp_dun; | |
85 | #define icmp_otime icmp_dun.id_ts.its_otime | |
86 | #define icmp_rtime icmp_dun.id_ts.its_rtime | |
87 | #define icmp_ttime icmp_dun.id_ts.its_ttime | |
88 | #define icmp_ip icmp_dun.id_ip.idi_ip | |
89 | #define icmp_mask icmp_dun.id_mask | |
90 | #define icmp_data icmp_dun.id_data | |
91 | }; | |
92 | ||
93 | /* | |
94 | * Lower bounds on packet lengths for various types. | |
95 | * For the error advice packets must first insure that the | |
96 | * packet is large enought to contain the returned ip header. | |
97 | * Only then can we do the check to see if 64 bits of packet | |
98 | * data have been returned, since we need to check the returned | |
99 | * ip header length. | |
100 | */ | |
101 | #define ICMP_MINLEN 8 /* abs minimum */ | |
102 | #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */ | |
103 | #define ICMP_MASKLEN 12 /* address mask */ | |
104 | #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ | |
105 | #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) | |
106 | /* N.B.: must separately check that ip_hl >= 5 */ | |
107 | ||
108 | /* | |
109 | * Definition of type and code field values. | |
110 | */ | |
111 | #define ICMP_ECHOREPLY 0 /* echo reply */ | |
112 | #define ICMP_UNREACH 3 /* dest unreachable, codes: */ | |
113 | #define ICMP_UNREACH_NET 0 /* bad net */ | |
114 | #define ICMP_UNREACH_HOST 1 /* bad host */ | |
115 | #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ | |
116 | #define ICMP_UNREACH_PORT 3 /* bad port */ | |
117 | #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ | |
118 | #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ | |
2cb63509 GW |
119 | #define ICMP_UNREACH_NETUNKNOWN 6 /* dest net unknown */ |
120 | #define ICMP_UNREACH_HSTUNKNOWN 7 /* dst host unknown */ | |
121 | #define ICMP_UNREACH_ISOLATED 8 /* src host isolated*/ | |
122 | /* next two are for administratively prohibited */ | |
123 | #define ICMP_UNREACH_NETADMIN 9 /* dest net */ | |
124 | #define ICMP_UNREACH_HOSTADMIN 10 /* dest host */ | |
125 | /* next two are for TOS unreachables */ | |
126 | #define ICMP_UNREACH_TOSNET 11 /* dest net+tos */ | |
127 | #define ICMP_UNREACH_TOSHOST 12 /* dest host+tos */ | |
128 | #define ICMP_UNREACH_MAXCODE 12 | |
129 | ||
15637ed4 | 130 | #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ |
2cb63509 | 131 | |
15637ed4 RG |
132 | #define ICMP_REDIRECT 5 /* shorter route, codes: */ |
133 | #define ICMP_REDIRECT_NET 0 /* for network */ | |
134 | #define ICMP_REDIRECT_HOST 1 /* for host */ | |
135 | #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ | |
136 | #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ | |
2cb63509 GW |
137 | #define ICMP_REDIRECT_MAXCODE 3 |
138 | ||
15637ed4 | 139 | #define ICMP_ECHO 8 /* echo service */ |
2cb63509 | 140 | |
15637ed4 RG |
141 | #define ICMP_TIMXCEED 11 /* time exceeded, code: */ |
142 | #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ | |
143 | #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ | |
2cb63509 GW |
144 | #define ICMP_TIMXCEED_MAXCODE 1 |
145 | ||
15637ed4 | 146 | #define ICMP_PARAMPROB 12 /* ip header bad */ |
2cb63509 GW |
147 | #define ICMP_PARAMPROB_GENERAL 0 /* generic problems */ |
148 | #define ICMP_PARAMPROB_REQDOPT 1 /* option misssing */ | |
149 | #define ICMP_PARAMPROB_MAXCODE 1 | |
150 | ||
15637ed4 RG |
151 | #define ICMP_TSTAMP 13 /* timestamp request */ |
152 | #define ICMP_TSTAMPREPLY 14 /* timestamp reply */ | |
153 | #define ICMP_IREQ 15 /* information request */ | |
154 | #define ICMP_IREQREPLY 16 /* information reply */ | |
155 | #define ICMP_MASKREQ 17 /* address mask request */ | |
156 | #define ICMP_MASKREPLY 18 /* address mask reply */ | |
157 | ||
158 | #define ICMP_MAXTYPE 18 | |
159 | ||
160 | #define ICMP_INFOTYPE(type) \ | |
161 | ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ | |
162 | (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ | |
163 | (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ | |
164 | (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) | |
2cb63509 GW |
165 | |
166 | #ifdef KERNEL | |
167 | struct mbuf; | |
168 | extern void icmp_error(struct mbuf *, int, int, struct in_addr, int); | |
169 | extern void icmp_input(struct mbuf *, int); | |
170 | n_time iptime(void); | |
171 | #endif | |
172 | ||
8ace4366 | 173 | #endif /* _NETINET_IP_ICMP_H_ */ |