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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /*
23: * Copyright (c) 1982, 1986, 1993
24: * The Regents of the University of California. All rights reserved.
25: *
26: * Redistribution and use in source and binary forms, with or without
27: * modification, are permitted provided that the following conditions
28: * are met:
29: * 1. Redistributions of source code must retain the above copyright
30: * notice, this list of conditions and the following disclaimer.
31: * 2. Redistributions in binary form must reproduce the above copyright
32: * notice, this list of conditions and the following disclaimer in the
33: * documentation and/or other materials provided with the distribution.
34: * 3. All advertising materials mentioning features or use of this software
35: * must display the following acknowledgement:
36: * This product includes software developed by the University of
37: * California, Berkeley and its contributors.
38: * 4. Neither the name of the University nor the names of its contributors
39: * may be used to endorse or promote products derived from this software
40: * without specific prior written permission.
41: *
42: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
43: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
44: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
45: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
46: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
47: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
48: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
49: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
50: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
51: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52: * SUCH DAMAGE.
53: *
54: * @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93
55: */
56:
57: #ifndef _NETINET_IP_ICMP_H_
58: #define _NETINET_IP_ICMP_H_
59:
60: /*
61: * Interface Control Message Protocol Definitions.
62: * Per RFC 792, September 1981.
63: */
64:
65: /*
66: * Internal of an ICMP Router Advertisement
67: */
68: struct icmp_ra_addr {
69: u_int32_t ira_addr;
70: u_int32_t ira_preference;
71: };
72:
73: /*
74: * Structure of an icmp header.
75: */
76: struct icmp {
77: u_char icmp_type; /* type of message, see below */
78: u_char icmp_code; /* type sub code */
79: u_short icmp_cksum; /* ones complement cksum of struct */
80: union {
81: u_char ih_pptr; /* ICMP_PARAMPROB */
82: struct in_addr ih_gwaddr; /* ICMP_REDIRECT */
83: struct ih_idseq {
84: n_short icd_id;
85: n_short icd_seq;
86: } ih_idseq;
87: int ih_void;
88:
89: /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
90: struct ih_pmtu {
91: n_short ipm_void;
92: n_short ipm_nextmtu;
93: } ih_pmtu;
94:
95: struct ih_rtradv {
96: u_char irt_num_addrs;
97: u_char irt_wpa;
98: u_int16_t irt_lifetime;
99: } ih_rtradv;
100: } icmp_hun;
101: #define icmp_pptr icmp_hun.ih_pptr
102: #define icmp_gwaddr icmp_hun.ih_gwaddr
103: #define icmp_id icmp_hun.ih_idseq.icd_id
104: #define icmp_seq icmp_hun.ih_idseq.icd_seq
105: #define icmp_void icmp_hun.ih_void
106: #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void
107: #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu
108: #define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs
109: #define icmp_wpa icmp_hun.ih_rtradv.irt_wpa
110: #define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime
111: union {
112: struct id_ts {
113: n_time its_otime;
114: n_time its_rtime;
115: n_time its_ttime;
116: } id_ts;
117: struct id_ip {
118: struct ip idi_ip;
119: /* options and then 64 bits of data */
120: } id_ip;
121: struct icmp_ra_addr id_radv;
122: u_int32_t id_mask;
123: char id_data[1];
124: } icmp_dun;
125: #define icmp_otime icmp_dun.id_ts.its_otime
126: #define icmp_rtime icmp_dun.id_ts.its_rtime
127: #define icmp_ttime icmp_dun.id_ts.its_ttime
128: #define icmp_ip icmp_dun.id_ip.idi_ip
129: #define icmp_radv icmp_dun.id_radv
130: #define icmp_mask icmp_dun.id_mask
131: #define icmp_data icmp_dun.id_data
132: };
133:
134: /*
135: * Lower bounds on packet lengths for various types.
136: * For the error advice packets must first insure that the
137: * packet is large enough to contain the returned ip header.
138: * Only then can we do the check to see if 64 bits of packet
139: * data have been returned, since we need to check the returned
140: * ip header length.
141: */
142: #define ICMP_MINLEN 8 /* abs minimum */
143: #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */
144: #define ICMP_MASKLEN 12 /* address mask */
145: #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */
146: #ifndef _IP_VHL
147: #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
148: /* N.B.: must separately check that ip_hl >= 5 */
149: #else
150: #define ICMP_ADVLEN(p) (8 + (IP_VHL_HL((p)->icmp_ip.ip_vhl) << 2) + 8)
151: /* N.B.: must separately check that header length >= 5 */
152: #endif
153:
154: /*
155: * Definition of type and code field values.
156: */
157: #define ICMP_ECHOREPLY 0 /* echo reply */
158: #define ICMP_UNREACH 3 /* dest unreachable, codes: */
159: #define ICMP_UNREACH_NET 0 /* bad net */
160: #define ICMP_UNREACH_HOST 1 /* bad host */
161: #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */
162: #define ICMP_UNREACH_PORT 3 /* bad port */
163: #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */
164: #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */
165: #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */
166: #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */
167: #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */
168: #define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */
169: #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */
170: #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */
171: #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */
172: #define ICMP_UNREACH_FILTER_PROHIB 13 /* admin prohib */
173: #define ICMP_UNREACH_HOST_PRECEDENCE 14 /* host prec vio. */
174: #define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* prec cutoff */
175: #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */
176: #define ICMP_REDIRECT 5 /* shorter route, codes: */
177: #define ICMP_REDIRECT_NET 0 /* for network */
178: #define ICMP_REDIRECT_HOST 1 /* for host */
179: #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */
180: #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */
181: #define ICMP_ECHO 8 /* echo service */
182: #define ICMP_ROUTERADVERT 9 /* router advertisement */
183: #define ICMP_ROUTERSOLICIT 10 /* router solicitation */
184: #define ICMP_TIMXCEED 11 /* time exceeded, code: */
185: #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */
186: #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */
187: #define ICMP_PARAMPROB 12 /* ip header bad */
188: #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */
189: #define ICMP_TSTAMP 13 /* timestamp request */
190: #define ICMP_TSTAMPREPLY 14 /* timestamp reply */
191: #define ICMP_IREQ 15 /* information request */
192: #define ICMP_IREQREPLY 16 /* information reply */
193: #define ICMP_MASKREQ 17 /* address mask request */
194: #define ICMP_MASKREPLY 18 /* address mask reply */
195:
196: #define ICMP_MAXTYPE 18
197:
198: #define ICMP_INFOTYPE(type) \
199: ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
200: (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \
201: (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
202: (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
203: (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
204:
205: #ifdef KERNEL
206: void icmp_error __P((struct mbuf *, int, int, n_long, struct ifnet *));
207: void icmp_input __P((struct mbuf *, int));
208: #endif
209:
210: #endif
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