Annotation of sys/netinet/ip_icmp.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: ip_icmp.h,v 1.21 2005/07/31 03:30:55 pascoe Exp $ */
2: /* $NetBSD: ip_icmp.h,v 1.10 1996/02/13 23:42:28 christos Exp $ */
3:
4: /*
5: * Copyright (c) 1982, 1986, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the University nor the names of its contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: *
32: * @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93
33: */
34:
35: #ifndef _NETINET_IP_ICMP_H_
36: #define _NETINET_IP_ICMP_H_
37:
38: /*
39: * Interface Control Message Protocol Definitions.
40: * Per RFC 792, September 1981.
41: * RFC 950, August 1985. (Address Mask Request / Reply)
42: * RFC 1256, September 1991. (Router Advertisement and Solicitation)
43: * RFC 1108, November 1991. (Param Problem, Missing Req. Option)
44: * RFC 1393, January 1993. (Traceroute)
45: * RFC 1475, June 1993. (Datagram Conversion Error)
46: * RFC 1812, June 1995. (adm prohib, host precedence, precedence cutoff)
47: * RFC 2002, October 1996. (Mobility changes to Router Advertisement)
48: */
49:
50: /*
51: * ICMP Router Advertisement data
52: */
53: struct icmp_ra_addr {
54: n_long ira_addr;
55: n_long ira_preference;
56: };
57:
58: /*
59: * Structure of an icmp header.
60: */
61: struct icmp {
62: u_int8_t icmp_type; /* type of message, see below */
63: u_int8_t icmp_code; /* type sub code */
64: u_int16_t icmp_cksum; /* ones complement cksum of struct */
65: union {
66: u_int8_t ih_pptr; /* ICMP_PARAMPROB */
67: struct in_addr ih_gwaddr; /* ICMP_REDIRECT */
68: struct ih_idseq {
69: n_short icd_id;
70: n_short icd_seq;
71: } ih_idseq;
72: int32_t ih_void;
73:
74: /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
75: struct ih_pmtu {
76: n_short ipm_void;
77: n_short ipm_nextmtu;
78: } ih_pmtu;
79:
80: struct ih_rtradv {
81: u_int8_t irt_num_addrs;
82: u_int8_t irt_wpa;
83: n_short irt_lifetime;
84: } ih_rtradv;
85: } icmp_hun;
86: #define icmp_pptr icmp_hun.ih_pptr
87: #define icmp_gwaddr icmp_hun.ih_gwaddr
88: #define icmp_id icmp_hun.ih_idseq.icd_id
89: #define icmp_seq icmp_hun.ih_idseq.icd_seq
90: #define icmp_void icmp_hun.ih_void
91: #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void
92: #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu
93: #define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs
94: #define icmp_wpa icmp_hun.ih_rtradv.irt_wpa
95: #define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime
96: union {
97: struct id_ts {
98: n_time its_otime;
99: n_time its_rtime;
100: n_time its_ttime;
101: } id_ts;
102: struct id_ip {
103: struct ip idi_ip;
104: /* options and then 64 bits of data */
105: } id_ip;
106: u_int32_t id_mask;
107: int8_t id_data[1];
108: } icmp_dun;
109: #define icmp_otime icmp_dun.id_ts.its_otime
110: #define icmp_rtime icmp_dun.id_ts.its_rtime
111: #define icmp_ttime icmp_dun.id_ts.its_ttime
112: #define icmp_ip icmp_dun.id_ip.idi_ip
113: #define icmp_mask icmp_dun.id_mask
114: #define icmp_data icmp_dun.id_data
115: };
116:
117: /*
118: * For IPv6 transition related ICMP errors.
119: */
120: #define ICMP_V6ADVLENMIN (8 + sizeof(struct ip) + 40)
121: #define ICMP_V6ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 40)
122:
123: /*
124: * Lower bounds on packet lengths for various types.
125: * For the error advice packets must first insure that the
126: * packet is large enough to contain the returned ip header.
127: * Only then can we do the check to see if 64 bits of packet
128: * data have been returned, since we need to check the returned
129: * ip header length.
130: */
131: #define ICMP_MINLEN 8 /* abs minimum */
132: #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */
133: #define ICMP_MASKLEN 12 /* address mask */
134: #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */
135: #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
136: /* N.B.: must separately check that ip_hl >= 5 */
137:
138: /*
139: * Definition of type and code field values.
140: * http://www.iana.org/assignments/icmp-parameters
141: */
142: #define ICMP_ECHOREPLY 0 /* echo reply */
143: #define ICMP_UNREACH 3 /* dest unreachable, codes: */
144: #define ICMP_UNREACH_NET 0 /* bad net */
145: #define ICMP_UNREACH_HOST 1 /* bad host */
146: #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */
147: #define ICMP_UNREACH_PORT 3 /* bad port */
148: #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */
149: #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */
150: #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */
151: #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */
152: #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */
153: #define ICMP_UNREACH_NET_PROHIB 9 /* for crypto devs */
154: #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */
155: #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */
156: #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */
157: #define ICMP_UNREACH_FILTER_PROHIB 13 /* prohibited access */
158: #define ICMP_UNREACH_HOST_PRECEDENCE 14 /* precedence violat'n*/
159: #define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* precedence cutoff */
160: #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */
161: #define ICMP_REDIRECT 5 /* shorter route, codes: */
162: #define ICMP_REDIRECT_NET 0 /* for network */
163: #define ICMP_REDIRECT_HOST 1 /* for host */
164: #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */
165: #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */
166: #define ICMP_ALTHOSTADDR 6 /* alternate host address */
167: #define ICMP_ECHO 8 /* echo service */
168: #define ICMP_ROUTERADVERT 9 /* router advertisement */
169: #define ICMP_ROUTERADVERT_NORMAL 0 /* normal advertisement */
170: #define ICMP_ROUTERADVERT_NOROUTE_COMMON 16 /* selective routing */
171: #define ICMP_ROUTERSOLICIT 10 /* router solicitation */
172: #define ICMP_TIMXCEED 11 /* time exceeded, code: */
173: #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */
174: #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */
175: #define ICMP_PARAMPROB 12 /* ip header bad */
176: #define ICMP_PARAMPROB_ERRATPTR 0 /* req. opt. absent */
177: #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */
178: #define ICMP_PARAMPROB_LENGTH 2 /* bad length */
179: #define ICMP_TSTAMP 13 /* timestamp request */
180: #define ICMP_TSTAMPREPLY 14 /* timestamp reply */
181: #define ICMP_IREQ 15 /* information request */
182: #define ICMP_IREQREPLY 16 /* information reply */
183: #define ICMP_MASKREQ 17 /* address mask request */
184: #define ICMP_MASKREPLY 18 /* address mask reply */
185: #define ICMP_TRACEROUTE 30 /* traceroute */
186: #define ICMP_DATACONVERR 31 /* data conversion error */
187: #define ICMP_MOBILE_REDIRECT 32 /* mobile host redirect */
188: #define ICMP_IPV6_WHEREAREYOU 33 /* IPv6 where-are-you */
189: #define ICMP_IPV6_IAMHERE 34 /* IPv6 i-am-here */
190: #define ICMP_MOBILE_REGREQUEST 35 /* mobile registration req */
191: #define ICMP_MOBILE_REGREPLY 36 /* mobile registration reply */
192: #define ICMP_SKIP 39 /* SKIP */
193: #define ICMP_PHOTURIS 40 /* Photuris */
194: #define ICMP_PHOTURIS_UNKNOWN_INDEX 1 /* unknown sec index */
195: #define ICMP_PHOTURIS_AUTH_FAILED 2 /* auth failed */
196: #define ICMP_PHOTURIS_DECRYPT_FAILED 3 /* decrypt failed */
197:
198: #define ICMP_MAXTYPE 40
199:
200: #define ICMP_INFOTYPE(type) \
201: ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
202: (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \
203: (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
204: (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
205: (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
206:
207: #ifdef _KERNEL
208: struct mbuf *
209: icmp_do_error(struct mbuf *, int, int, n_long, int);
210: void icmp_error(struct mbuf *, int, int, n_long, int);
211: void icmp_input(struct mbuf *, ...);
212: void icmp_init(void);
213: void icmp_reflect(struct mbuf *);
214: void icmp_send(struct mbuf *, struct mbuf *);
215: int icmp_sysctl(int *, u_int, void *, size_t *, void *, size_t);
216: struct rtentry *
217: icmp_mtudisc_clone(struct sockaddr *);
218: void icmp_mtudisc(struct icmp *);
219: #endif /* _KERNEL */
220: #endif /* _NETINET_IP_ICMP_H_ */
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