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1 | f0cbd3ec | bellard | /*
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2 | f0cbd3ec | bellard | * Copyright (c) 1982, 1986, 1993
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3 | f0cbd3ec | bellard | * The Regents of the University of California. All rights reserved.
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4 | f0cbd3ec | bellard | *
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5 | f0cbd3ec | bellard | * Redistribution and use in source and binary forms, with or without
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6 | f0cbd3ec | bellard | * modification, are permitted provided that the following conditions
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7 | f0cbd3ec | bellard | * are met:
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8 | f0cbd3ec | bellard | * 1. Redistributions of source code must retain the above copyright
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9 | f0cbd3ec | bellard | * notice, this list of conditions and the following disclaimer.
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10 | f0cbd3ec | bellard | * 2. Redistributions in binary form must reproduce the above copyright
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11 | f0cbd3ec | bellard | * notice, this list of conditions and the following disclaimer in the
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12 | f0cbd3ec | bellard | * documentation and/or other materials provided with the distribution.
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13 | f0cbd3ec | bellard | * 3. All advertising materials mentioning features or use of this software
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14 | f0cbd3ec | bellard | * must display the following acknowledgement:
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15 | f0cbd3ec | bellard | * This product includes software developed by the University of
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16 | f0cbd3ec | bellard | * California, Berkeley and its contributors.
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17 | f0cbd3ec | bellard | * 4. Neither the name of the University nor the names of its contributors
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18 | f0cbd3ec | bellard | * may be used to endorse or promote products derived from this software
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19 | f0cbd3ec | bellard | * without specific prior written permission.
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20 | f0cbd3ec | bellard | *
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21 | f0cbd3ec | bellard | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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22 | f0cbd3ec | bellard | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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23 | f0cbd3ec | bellard | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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24 | f0cbd3ec | bellard | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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25 | f0cbd3ec | bellard | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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26 | f0cbd3ec | bellard | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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27 | f0cbd3ec | bellard | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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28 | f0cbd3ec | bellard | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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29 | f0cbd3ec | bellard | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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30 | f0cbd3ec | bellard | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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31 | f0cbd3ec | bellard | * SUCH DAMAGE.
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32 | f0cbd3ec | bellard | *
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33 | f0cbd3ec | bellard | * @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93
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34 | f0cbd3ec | bellard | * ip_icmp.h,v 1.4 1995/05/30 08:09:43 rgrimes Exp
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35 | f0cbd3ec | bellard | */
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36 | f0cbd3ec | bellard | |
37 | f0cbd3ec | bellard | #ifndef _NETINET_IP_ICMP_H_
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38 | f0cbd3ec | bellard | #define _NETINET_IP_ICMP_H_
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39 | f0cbd3ec | bellard | |
40 | f0cbd3ec | bellard | /*
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41 | f0cbd3ec | bellard | * Interface Control Message Protocol Definitions.
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42 | f0cbd3ec | bellard | * Per RFC 792, September 1981.
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43 | f0cbd3ec | bellard | */
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44 | f0cbd3ec | bellard | |
45 | f0cbd3ec | bellard | typedef u_int32_t n_time;
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46 | f0cbd3ec | bellard | |
47 | f0cbd3ec | bellard | /*
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48 | f0cbd3ec | bellard | * Structure of an icmp header.
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49 | f0cbd3ec | bellard | */
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50 | f0cbd3ec | bellard | struct icmp {
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51 | f0cbd3ec | bellard | u_char icmp_type; /* type of message, see below */
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52 | f0cbd3ec | bellard | u_char icmp_code; /* type sub code */
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53 | f0cbd3ec | bellard | u_short icmp_cksum; /* ones complement cksum of struct */
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54 | f0cbd3ec | bellard | union {
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55 | f0cbd3ec | bellard | u_char ih_pptr; /* ICMP_PARAMPROB */
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56 | f0cbd3ec | bellard | struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ |
57 | f0cbd3ec | bellard | struct ih_idseq {
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58 | f0cbd3ec | bellard | u_short icd_id; |
59 | f0cbd3ec | bellard | u_short icd_seq; |
60 | f0cbd3ec | bellard | } ih_idseq; |
61 | f0cbd3ec | bellard | int ih_void;
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62 | f0cbd3ec | bellard | |
63 | f0cbd3ec | bellard | /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
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64 | f0cbd3ec | bellard | struct ih_pmtu {
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65 | f0cbd3ec | bellard | u_short ipm_void; |
66 | f0cbd3ec | bellard | u_short ipm_nextmtu; |
67 | f0cbd3ec | bellard | } ih_pmtu; |
68 | f0cbd3ec | bellard | } icmp_hun; |
69 | f0cbd3ec | bellard | #define icmp_pptr icmp_hun.ih_pptr
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70 | f0cbd3ec | bellard | #define icmp_gwaddr icmp_hun.ih_gwaddr
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71 | f0cbd3ec | bellard | #define icmp_id icmp_hun.ih_idseq.icd_id
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72 | f0cbd3ec | bellard | #define icmp_seq icmp_hun.ih_idseq.icd_seq
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73 | f0cbd3ec | bellard | #define icmp_void icmp_hun.ih_void
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74 | f0cbd3ec | bellard | #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void
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75 | f0cbd3ec | bellard | #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu
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76 | f0cbd3ec | bellard | union {
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77 | f0cbd3ec | bellard | struct id_ts {
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78 | f0cbd3ec | bellard | n_time its_otime; |
79 | f0cbd3ec | bellard | n_time its_rtime; |
80 | f0cbd3ec | bellard | n_time its_ttime; |
81 | f0cbd3ec | bellard | } id_ts; |
82 | f0cbd3ec | bellard | struct id_ip {
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83 | f0cbd3ec | bellard | struct ip idi_ip;
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84 | f0cbd3ec | bellard | /* options and then 64 bits of data */
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85 | f0cbd3ec | bellard | } id_ip; |
86 | 101c5935 | bellard | uint32_t id_mask; |
87 | 101c5935 | bellard | char id_data[1]; |
88 | f0cbd3ec | bellard | } icmp_dun; |
89 | f0cbd3ec | bellard | #define icmp_otime icmp_dun.id_ts.its_otime
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90 | f0cbd3ec | bellard | #define icmp_rtime icmp_dun.id_ts.its_rtime
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91 | f0cbd3ec | bellard | #define icmp_ttime icmp_dun.id_ts.its_ttime
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92 | f0cbd3ec | bellard | #define icmp_ip icmp_dun.id_ip.idi_ip
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93 | f0cbd3ec | bellard | #define icmp_mask icmp_dun.id_mask
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94 | f0cbd3ec | bellard | #define icmp_data icmp_dun.id_data
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95 | f0cbd3ec | bellard | }; |
96 | f0cbd3ec | bellard | |
97 | f0cbd3ec | bellard | /*
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98 | f0cbd3ec | bellard | * Lower bounds on packet lengths for various types.
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99 | f0cbd3ec | bellard | * For the error advice packets must first insure that the
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100 | f0cbd3ec | bellard | * packet is large enought to contain the returned ip header.
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101 | f0cbd3ec | bellard | * Only then can we do the check to see if 64 bits of packet
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102 | f0cbd3ec | bellard | * data have been returned, since we need to check the returned
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103 | f0cbd3ec | bellard | * ip header length.
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104 | f0cbd3ec | bellard | */
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105 | f0cbd3ec | bellard | #define ICMP_MINLEN 8 /* abs minimum */ |
106 | f0cbd3ec | bellard | #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */ |
107 | f0cbd3ec | bellard | #define ICMP_MASKLEN 12 /* address mask */ |
108 | f0cbd3ec | bellard | #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ |
109 | f0cbd3ec | bellard | #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) |
110 | f0cbd3ec | bellard | /* N.B.: must separately check that ip_hl >= 5 */
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111 | f0cbd3ec | bellard | |
112 | f0cbd3ec | bellard | /*
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113 | f0cbd3ec | bellard | * Definition of type and code field values.
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114 | f0cbd3ec | bellard | */
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115 | f0cbd3ec | bellard | #define ICMP_ECHOREPLY 0 /* echo reply */ |
116 | f0cbd3ec | bellard | #define ICMP_UNREACH 3 /* dest unreachable, codes: */ |
117 | f0cbd3ec | bellard | #define ICMP_UNREACH_NET 0 /* bad net */ |
118 | f0cbd3ec | bellard | #define ICMP_UNREACH_HOST 1 /* bad host */ |
119 | f0cbd3ec | bellard | #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ |
120 | f0cbd3ec | bellard | #define ICMP_UNREACH_PORT 3 /* bad port */ |
121 | f0cbd3ec | bellard | #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ |
122 | f0cbd3ec | bellard | #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ |
123 | f0cbd3ec | bellard | #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */ |
124 | f0cbd3ec | bellard | #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */ |
125 | f0cbd3ec | bellard | #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */ |
126 | f0cbd3ec | bellard | #define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */ |
127 | f0cbd3ec | bellard | #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */ |
128 | f0cbd3ec | bellard | #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */ |
129 | f0cbd3ec | bellard | #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */ |
130 | f0cbd3ec | bellard | #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ |
131 | f0cbd3ec | bellard | #define ICMP_REDIRECT 5 /* shorter route, codes: */ |
132 | f0cbd3ec | bellard | #define ICMP_REDIRECT_NET 0 /* for network */ |
133 | f0cbd3ec | bellard | #define ICMP_REDIRECT_HOST 1 /* for host */ |
134 | f0cbd3ec | bellard | #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ |
135 | f0cbd3ec | bellard | #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ |
136 | f0cbd3ec | bellard | #define ICMP_ECHO 8 /* echo service */ |
137 | f0cbd3ec | bellard | #define ICMP_ROUTERADVERT 9 /* router advertisement */ |
138 | f0cbd3ec | bellard | #define ICMP_ROUTERSOLICIT 10 /* router solicitation */ |
139 | f0cbd3ec | bellard | #define ICMP_TIMXCEED 11 /* time exceeded, code: */ |
140 | f0cbd3ec | bellard | #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ |
141 | f0cbd3ec | bellard | #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ |
142 | f0cbd3ec | bellard | #define ICMP_PARAMPROB 12 /* ip header bad */ |
143 | f0cbd3ec | bellard | #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */ |
144 | f0cbd3ec | bellard | #define ICMP_TSTAMP 13 /* timestamp request */ |
145 | f0cbd3ec | bellard | #define ICMP_TSTAMPREPLY 14 /* timestamp reply */ |
146 | f0cbd3ec | bellard | #define ICMP_IREQ 15 /* information request */ |
147 | f0cbd3ec | bellard | #define ICMP_IREQREPLY 16 /* information reply */ |
148 | f0cbd3ec | bellard | #define ICMP_MASKREQ 17 /* address mask request */ |
149 | f0cbd3ec | bellard | #define ICMP_MASKREPLY 18 /* address mask reply */ |
150 | f0cbd3ec | bellard | |
151 | f0cbd3ec | bellard | #define ICMP_MAXTYPE 18 |
152 | f0cbd3ec | bellard | |
153 | f0cbd3ec | bellard | #define ICMP_INFOTYPE(type) \
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154 | f0cbd3ec | bellard | ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ |
155 | f0cbd3ec | bellard | (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \ |
156 | f0cbd3ec | bellard | (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ |
157 | f0cbd3ec | bellard | (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ |
158 | f0cbd3ec | bellard | (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) |
159 | f0cbd3ec | bellard | |
160 | f0cbd3ec | bellard | void icmp_input _P((struct mbuf *, int)); |
161 | f0cbd3ec | bellard | void icmp_error _P((struct mbuf *, u_char, u_char, int, char *)); |
162 | f0cbd3ec | bellard | void icmp_reflect _P((struct mbuf *)); |
163 | f0cbd3ec | bellard | |
164 | f0cbd3ec | bellard | #endif |