1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
|
/* $OpenBSD: ip_icmp.h,v 1.24 2010/09/13 09:59:32 claudio Exp $ */
/* $NetBSD: ip_icmp.h,v 1.10 1996/02/13 23:42:28 christos Exp $ */
/*
* Copyright (c) 1982, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93
*/
#ifndef _NETINET_IP_ICMP_H_
#define _NETINET_IP_ICMP_H_
/*
* Interface Control Message Protocol Definitions.
* Per RFC 792, September 1981.
* RFC 950, August 1985. (Address Mask Request / Reply)
* RFC 1256, September 1991. (Router Advertisement and Solicitation)
* RFC 1108, November 1991. (Param Problem, Missing Req. Option)
* RFC 1393, January 1993. (Traceroute)
* RFC 1475, June 1993. (Datagram Conversion Error)
* RFC 1812, June 1995. (adm prohib, host precedence, precedence cutoff)
* RFC 2002, October 1996. (Mobility changes to Router Advertisement)
*/
/*
* ICMP Router Advertisement data
*/
struct icmp_ra_addr {
n_long ira_addr;
n_long ira_preference;
};
/*
* Structure of an icmp header.
*/
struct icmp {
u_int8_t icmp_type; /* type of message, see below */
u_int8_t icmp_code; /* type sub code */
u_int16_t icmp_cksum; /* ones complement cksum of struct */
union {
u_int8_t ih_pptr; /* ICMP_PARAMPROB */
struct ih_exthdr { /* RFC4884 extended header */
u_int8_t iex_pad;
u_int8_t iex_length;
} ih_exthdr;
struct in_addr ih_gwaddr; /* ICMP_REDIRECT */
struct ih_idseq {
n_short icd_id;
n_short icd_seq;
} ih_idseq;
int32_t ih_void;
/* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
struct ih_pmtu {
n_short ipm_void;
n_short ipm_nextmtu;
} ih_pmtu;
struct ih_rtradv {
u_int8_t irt_num_addrs;
u_int8_t irt_wpa;
n_short irt_lifetime;
} ih_rtradv;
} icmp_hun;
#define icmp_pptr icmp_hun.ih_pptr
#define icmp_length icmp_hun.ih_exthdr.iex_length
#define icmp_gwaddr icmp_hun.ih_gwaddr
#define icmp_id icmp_hun.ih_idseq.icd_id
#define icmp_seq icmp_hun.ih_idseq.icd_seq
#define icmp_void icmp_hun.ih_void
#define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void
#define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu
#define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs
#define icmp_wpa icmp_hun.ih_rtradv.irt_wpa
#define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime
union {
struct id_ts {
n_time its_otime;
n_time its_rtime;
n_time its_ttime;
} id_ts;
struct id_ip {
struct ip idi_ip;
/* options and then 64 bits of data */
} id_ip;
u_int32_t id_mask;
int8_t id_data[1];
} icmp_dun;
#define icmp_otime icmp_dun.id_ts.its_otime
#define icmp_rtime icmp_dun.id_ts.its_rtime
#define icmp_ttime icmp_dun.id_ts.its_ttime
#define icmp_ip icmp_dun.id_ip.idi_ip
#define icmp_mask icmp_dun.id_mask
#define icmp_data icmp_dun.id_data
};
struct icmp_ext_hdr {
u_int8_t ieh_version; /* only high nibble used */
u_int8_t ieh_res; /* reserved, must be zero */
u_int16_t ieh_cksum; /* ones complement cksum of ext hdr */
};
#define ICMP_EXT_HDR_VERSION 0x20
#define ICMP_EXT_HDR_VMASK 0xf0
#define ICMP_EXT_OFFSET 128
struct icmp_ext_obj_hdr {
u_int16_t ieo_length; /* length of obj incl this header */
u_int8_t ieo_cnum; /* class number */
u_int8_t ieo_ctype; /* sub class type */
};
#define ICMP_EXT_MPLS 1
#define ICMP_EXT_IFINFO 2
/*
* For IPv6 transition related ICMP errors.
*/
#define ICMP_V6ADVLENMIN (8 + sizeof(struct ip) + 40)
#define ICMP_V6ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 40)
/*
* Lower bounds on packet lengths for various types.
* For the error advice packets must first insure that the
* packet is large enough to contain the returned ip header.
* Only then can we do the check to see if 64 bits of packet
* data have been returned, since we need to check the returned
* ip header length.
*/
#define ICMP_MINLEN 8 /* abs minimum */
#define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */
#define ICMP_MASKLEN 12 /* address mask */
#define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */
#define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
/* N.B.: must separately check that ip_hl >= 5 */
/*
* Definition of type and code field values.
* http://www.iana.org/assignments/icmp-parameters
*/
#define ICMP_ECHOREPLY 0 /* echo reply */
#define ICMP_UNREACH 3 /* dest unreachable, codes: */
#define ICMP_UNREACH_NET 0 /* bad net */
#define ICMP_UNREACH_HOST 1 /* bad host */
#define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */
#define ICMP_UNREACH_PORT 3 /* bad port */
#define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */
#define ICMP_UNREACH_SRCFAIL 5 /* src route failed */
#define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */
#define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */
#define ICMP_UNREACH_ISOLATED 8 /* src host isolated */
#define ICMP_UNREACH_NET_PROHIB 9 /* for crypto devs */
#define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */
#define ICMP_UNREACH_TOSNET 11 /* bad tos for net */
#define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */
#define ICMP_UNREACH_FILTER_PROHIB 13 /* prohibited access */
#define ICMP_UNREACH_HOST_PRECEDENCE 14 /* precedence violat'n*/
#define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* precedence cutoff */
#define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */
#define ICMP_REDIRECT 5 /* shorter route, codes: */
#define ICMP_REDIRECT_NET 0 /* for network */
#define ICMP_REDIRECT_HOST 1 /* for host */
#define ICMP_REDIRECT_TOSNET 2 /* for tos and net */
#define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */
#define ICMP_ALTHOSTADDR 6 /* alternate host address */
#define ICMP_ECHO 8 /* echo service */
#define ICMP_ROUTERADVERT 9 /* router advertisement */
#define ICMP_ROUTERADVERT_NORMAL 0 /* normal advertisement */
#define ICMP_ROUTERADVERT_NOROUTE_COMMON 16 /* selective routing */
#define ICMP_ROUTERSOLICIT 10 /* router solicitation */
#define ICMP_TIMXCEED 11 /* time exceeded, code: */
#define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */
#define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */
#define ICMP_PARAMPROB 12 /* ip header bad */
#define ICMP_PARAMPROB_ERRATPTR 0 /* req. opt. absent */
#define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */
#define ICMP_PARAMPROB_LENGTH 2 /* bad length */
#define ICMP_TSTAMP 13 /* timestamp request */
#define ICMP_TSTAMPREPLY 14 /* timestamp reply */
#define ICMP_IREQ 15 /* information request */
#define ICMP_IREQREPLY 16 /* information reply */
#define ICMP_MASKREQ 17 /* address mask request */
#define ICMP_MASKREPLY 18 /* address mask reply */
#define ICMP_TRACEROUTE 30 /* traceroute */
#define ICMP_DATACONVERR 31 /* data conversion error */
#define ICMP_MOBILE_REDIRECT 32 /* mobile host redirect */
#define ICMP_IPV6_WHEREAREYOU 33 /* IPv6 where-are-you */
#define ICMP_IPV6_IAMHERE 34 /* IPv6 i-am-here */
#define ICMP_MOBILE_REGREQUEST 35 /* mobile registration req */
#define ICMP_MOBILE_REGREPLY 36 /* mobile registration reply */
#define ICMP_SKIP 39 /* SKIP */
#define ICMP_PHOTURIS 40 /* Photuris */
#define ICMP_PHOTURIS_UNKNOWN_INDEX 1 /* unknown sec index */
#define ICMP_PHOTURIS_AUTH_FAILED 2 /* auth failed */
#define ICMP_PHOTURIS_DECRYPT_FAILED 3 /* decrypt failed */
#define ICMP_MAXTYPE 40
#define ICMP_INFOTYPE(type) \
((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
(type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \
(type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
(type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
(type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
#ifdef _KERNEL
struct mbuf *
icmp_do_error(struct mbuf *, int, int, n_long, int);
void icmp_error(struct mbuf *, int, int, n_long, int);
void icmp_input(struct mbuf *, ...);
void icmp_init(void);
int icmp_reflect(struct mbuf *, struct mbuf **, struct in_ifaddr *);
void icmp_send(struct mbuf *, struct mbuf *);
int icmp_sysctl(int *, u_int, void *, size_t *, void *, size_t);
struct rtentry *
icmp_mtudisc_clone(struct sockaddr *, u_int);
void icmp_mtudisc(struct icmp *, u_int);
int icmp_do_exthdr(struct mbuf *, u_int16_t, u_int8_t, void *, size_t);
#endif /* _KERNEL */
#endif /* _NETINET_IP_ICMP_H_ */
|
