xref: /minix3/external/bsd/dhcp/dist/includes/netinet/ip_icmp.h (revision 83ee113ee0d94f3844d44065af2311604e9a30ad)
1*83ee113eSDavid van Moolenbroek /*	$NetBSD: ip_icmp.h,v 1.1.1.2 2014/07/12 11:57:57 spz Exp $	*/
2*83ee113eSDavid van Moolenbroek /*	NetBSD: ip_icmp.h,v 1.11 1996/08/03 15:48:18 neil Exp 	*/
3*83ee113eSDavid van Moolenbroek 
4*83ee113eSDavid van Moolenbroek /*
5*83ee113eSDavid van Moolenbroek  * Copyright (c) 1982, 1986, 1993
6*83ee113eSDavid van Moolenbroek  *	The Regents of the University of California.  All rights reserved.
7*83ee113eSDavid van Moolenbroek  *
8*83ee113eSDavid van Moolenbroek  * Redistribution and use in source and binary forms, with or without
9*83ee113eSDavid van Moolenbroek  * modification, are permitted provided that the following conditions
10*83ee113eSDavid van Moolenbroek  * are met:
11*83ee113eSDavid van Moolenbroek  * 1. Redistributions of source code must retain the above copyright
12*83ee113eSDavid van Moolenbroek  *    notice, this list of conditions and the following disclaimer.
13*83ee113eSDavid van Moolenbroek  * 2. Redistributions in binary form must reproduce the above copyright
14*83ee113eSDavid van Moolenbroek  *    notice, this list of conditions and the following disclaimer in the
15*83ee113eSDavid van Moolenbroek  *    documentation and/or other materials provided with the distribution.
16*83ee113eSDavid van Moolenbroek  * 3. Neither the name of the University nor the names of its contributors
17*83ee113eSDavid van Moolenbroek  *    may be used to endorse or promote products derived from this software
18*83ee113eSDavid van Moolenbroek  *    without specific prior written permission.
19*83ee113eSDavid van Moolenbroek  *
20*83ee113eSDavid van Moolenbroek  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21*83ee113eSDavid van Moolenbroek  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22*83ee113eSDavid van Moolenbroek  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23*83ee113eSDavid van Moolenbroek  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24*83ee113eSDavid van Moolenbroek  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25*83ee113eSDavid van Moolenbroek  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26*83ee113eSDavid van Moolenbroek  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27*83ee113eSDavid van Moolenbroek  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28*83ee113eSDavid van Moolenbroek  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29*83ee113eSDavid van Moolenbroek  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30*83ee113eSDavid van Moolenbroek  * SUCH DAMAGE.
31*83ee113eSDavid van Moolenbroek  *
32*83ee113eSDavid van Moolenbroek  *	@(#)ip_icmp.h	8.1 (Berkeley) 6/10/93
33*83ee113eSDavid van Moolenbroek  */
34*83ee113eSDavid van Moolenbroek 
35*83ee113eSDavid van Moolenbroek 
36*83ee113eSDavid van Moolenbroek /*
37*83ee113eSDavid van Moolenbroek  * Interface Control Message Protocol Definitions.
38*83ee113eSDavid van Moolenbroek  * Per RFC 792, September 1981.
39*83ee113eSDavid van Moolenbroek  */
40*83ee113eSDavid van Moolenbroek 
41*83ee113eSDavid van Moolenbroek /*
42*83ee113eSDavid van Moolenbroek  * Internal of an ICMP Router Advertisement
43*83ee113eSDavid van Moolenbroek  */
44*83ee113eSDavid van Moolenbroek struct icmp_ra_addr {
45*83ee113eSDavid van Moolenbroek 	u_int32_t ira_addr;
46*83ee113eSDavid van Moolenbroek 	u_int32_t ira_preference;
47*83ee113eSDavid van Moolenbroek };
48*83ee113eSDavid van Moolenbroek 
49*83ee113eSDavid van Moolenbroek /*
50*83ee113eSDavid van Moolenbroek  * Structure of an icmp header.
51*83ee113eSDavid van Moolenbroek  */
52*83ee113eSDavid van Moolenbroek struct icmp {
53*83ee113eSDavid van Moolenbroek 	u_int8_t  icmp_type;		/* type of message, see below */
54*83ee113eSDavid van Moolenbroek 	u_int8_t  icmp_code;		/* type sub code */
55*83ee113eSDavid van Moolenbroek 	u_int16_t icmp_cksum;		/* ones complement cksum of struct */
56*83ee113eSDavid van Moolenbroek 	union {
57*83ee113eSDavid van Moolenbroek 		u_int8_t  ih_pptr;		/* ICMP_PARAMPROB */
58*83ee113eSDavid van Moolenbroek 		struct in_addr ih_gwaddr;	/* ICMP_REDIRECT */
59*83ee113eSDavid van Moolenbroek 		struct ih_idseq {
60*83ee113eSDavid van Moolenbroek 			  int16_t icd_id;
61*83ee113eSDavid van Moolenbroek 			  int16_t icd_seq;
62*83ee113eSDavid van Moolenbroek 		} ih_idseq;
63*83ee113eSDavid van Moolenbroek 		int32_t   ih_void;
64*83ee113eSDavid van Moolenbroek 
65*83ee113eSDavid van Moolenbroek 		/* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
66*83ee113eSDavid van Moolenbroek 		struct ih_pmtu {
67*83ee113eSDavid van Moolenbroek 			  int16_t ipm_void;
68*83ee113eSDavid van Moolenbroek 			  int16_t ipm_nextmtu;
69*83ee113eSDavid van Moolenbroek 		} ih_pmtu;
70*83ee113eSDavid van Moolenbroek 		struct ih_rtradv {
71*83ee113eSDavid van Moolenbroek 			u_int8_t irt_num_addrs;
72*83ee113eSDavid van Moolenbroek 			u_int8_t irt_wpa;
73*83ee113eSDavid van Moolenbroek 			u_int16_t irt_lifetime;
74*83ee113eSDavid van Moolenbroek 		} ih_rtradv;
75*83ee113eSDavid van Moolenbroek 	} icmp_hun;
76*83ee113eSDavid van Moolenbroek #define	icmp_pptr	  icmp_hun.ih_pptr
77*83ee113eSDavid van Moolenbroek #define	icmp_gwaddr	  icmp_hun.ih_gwaddr
78*83ee113eSDavid van Moolenbroek #define	icmp_id		  icmp_hun.ih_idseq.icd_id
79*83ee113eSDavid van Moolenbroek #define	icmp_seq	  icmp_hun.ih_idseq.icd_seq
80*83ee113eSDavid van Moolenbroek #define	icmp_void	  icmp_hun.ih_void
81*83ee113eSDavid van Moolenbroek #define	icmp_pmvoid	  icmp_hun.ih_pmtu.ipm_void
82*83ee113eSDavid van Moolenbroek #define	icmp_nextmtu	  icmp_hun.ih_pmtu.ipm_nextmtu
83*83ee113eSDavid van Moolenbroek #define icmp_num_addrs    icmp_hun.ih_rtradv.irt_num_addrs
84*83ee113eSDavid van Moolenbroek #define icmp_wpa	  icmp_hun.ih_rtradv.irt_wpa
85*83ee113eSDavid van Moolenbroek #define icmp_lifetime	  icmp_hun.ih_rtradv.irt_lifetime
86*83ee113eSDavid van Moolenbroek 	union {
87*83ee113eSDavid van Moolenbroek 		struct id_ts {
88*83ee113eSDavid van Moolenbroek 			  u_int32_t its_otime;
89*83ee113eSDavid van Moolenbroek 			  u_int32_t its_rtime;
90*83ee113eSDavid van Moolenbroek 			  u_int32_t its_ttime;
91*83ee113eSDavid van Moolenbroek 		} id_ts;
92*83ee113eSDavid van Moolenbroek 		struct id_ip  {
93*83ee113eSDavid van Moolenbroek 			  struct ip idi_ip;
94*83ee113eSDavid van Moolenbroek 			  /* options and then 64 bits of data */
95*83ee113eSDavid van Moolenbroek 		} id_ip;
96*83ee113eSDavid van Moolenbroek 		struct icmp_ra_addr id_radv;
97*83ee113eSDavid van Moolenbroek 		u_int32_t id_mask;
98*83ee113eSDavid van Moolenbroek 		int8_t	  id_data[1];
99*83ee113eSDavid van Moolenbroek 	} icmp_dun;
100*83ee113eSDavid van Moolenbroek #define	icmp_otime	  icmp_dun.id_ts.its_otime
101*83ee113eSDavid van Moolenbroek #define	icmp_rtime	  icmp_dun.id_ts.its_rtime
102*83ee113eSDavid van Moolenbroek #define	icmp_ttime	  icmp_dun.id_ts.its_ttime
103*83ee113eSDavid van Moolenbroek #define	icmp_ip		  icmp_dun.id_ip.idi_ip
104*83ee113eSDavid van Moolenbroek #define icmp_radv	  icmp_dun.id_mask
105*83ee113eSDavid van Moolenbroek #define	icmp_mask	  icmp_dun.id_mask
106*83ee113eSDavid van Moolenbroek #define	icmp_data	  icmp_dun.id_data
107*83ee113eSDavid van Moolenbroek };
108*83ee113eSDavid van Moolenbroek 
109*83ee113eSDavid van Moolenbroek /*
110*83ee113eSDavid van Moolenbroek  * Lower bounds on packet lengths for various types.
111*83ee113eSDavid van Moolenbroek  * For the error advice packets must first insure that the
112*83ee113eSDavid van Moolenbroek  * packet is large enought to contain the returned ip header.
113*83ee113eSDavid van Moolenbroek  * Only then can we do the check to see if 64 bits of packet
114*83ee113eSDavid van Moolenbroek  * data have been returned, since we need to check the returned
115*83ee113eSDavid van Moolenbroek  * ip header length.
116*83ee113eSDavid van Moolenbroek  */
117*83ee113eSDavid van Moolenbroek #define	ICMP_MINLEN	8				/* abs minimum */
118*83ee113eSDavid van Moolenbroek #define	ICMP_TSLEN	(8 + 3 * sizeof (u_int32_t))	/* timestamp */
119*83ee113eSDavid van Moolenbroek #define	ICMP_MASKLEN	12				/* address mask */
120*83ee113eSDavid van Moolenbroek #define	ICMP_ADVLENMIN	(8 + sizeof (struct ip) + 8)	/* min */
121*83ee113eSDavid van Moolenbroek #define	ICMP_ADVLEN(p)	(8 + ((p)->icmp_ip.ip_hl << 2) + 8)
122*83ee113eSDavid van Moolenbroek 	/* N.B.: must separately check that ip_hl >= 5 */
123*83ee113eSDavid van Moolenbroek 
124*83ee113eSDavid van Moolenbroek /*
125*83ee113eSDavid van Moolenbroek  * Definition of type and code field values.
126*83ee113eSDavid van Moolenbroek  */
127*83ee113eSDavid van Moolenbroek #define	ICMP_ECHOREPLY		0		/* echo reply */
128*83ee113eSDavid van Moolenbroek #define	ICMP_UNREACH		3		/* dest unreachable, codes: */
129*83ee113eSDavid van Moolenbroek #define		ICMP_UNREACH_NET	0		/* bad net */
130*83ee113eSDavid van Moolenbroek #define		ICMP_UNREACH_HOST	1		/* bad host */
131*83ee113eSDavid van Moolenbroek #define		ICMP_UNREACH_PROTOCOL	2		/* bad protocol */
132*83ee113eSDavid van Moolenbroek #define		ICMP_UNREACH_PORT	3		/* bad port */
133*83ee113eSDavid van Moolenbroek #define		ICMP_UNREACH_NEEDFRAG	4		/* IP_DF caused drop */
134*83ee113eSDavid van Moolenbroek #define		ICMP_UNREACH_SRCFAIL	5		/* src route failed */
135*83ee113eSDavid van Moolenbroek #define		ICMP_UNREACH_NET_UNKNOWN 6		/* unknown net */
136*83ee113eSDavid van Moolenbroek #define		ICMP_UNREACH_HOST_UNKNOWN 7		/* unknown host */
137*83ee113eSDavid van Moolenbroek #define		ICMP_UNREACH_ISOLATED	8		/* src host isolated */
138*83ee113eSDavid van Moolenbroek #define		ICMP_UNREACH_NET_PROHIB	9		/* prohibited access */
139*83ee113eSDavid van Moolenbroek #define		ICMP_UNREACH_HOST_PROHIB 10		/* ditto */
140*83ee113eSDavid van Moolenbroek #define		ICMP_UNREACH_TOSNET	11		/* bad tos for net */
141*83ee113eSDavid van Moolenbroek #define		ICMP_UNREACH_TOSHOST	12		/* bad tos for host */
142*83ee113eSDavid van Moolenbroek #define	ICMP_SOURCEQUENCH	4		/* packet lost, slow down */
143*83ee113eSDavid van Moolenbroek #define	ICMP_REDIRECT		5		/* shorter route, codes: */
144*83ee113eSDavid van Moolenbroek #define		ICMP_REDIRECT_NET	0		/* for network */
145*83ee113eSDavid van Moolenbroek #define		ICMP_REDIRECT_HOST	1		/* for host */
146*83ee113eSDavid van Moolenbroek #define		ICMP_REDIRECT_TOSNET	2		/* for tos and net */
147*83ee113eSDavid van Moolenbroek #define		ICMP_REDIRECT_TOSHOST	3		/* for tos and host */
148*83ee113eSDavid van Moolenbroek #define	ICMP_ECHO		8		/* echo service */
149*83ee113eSDavid van Moolenbroek #define	ICMP_ROUTERADVERT	9		/* router advertisement */
150*83ee113eSDavid van Moolenbroek #define	ICMP_ROUTERSOLICIT	10		/* router solicitation */
151*83ee113eSDavid van Moolenbroek #define	ICMP_TIMXCEED		11		/* time exceeded, code: */
152*83ee113eSDavid van Moolenbroek #define		ICMP_TIMXCEED_INTRANS	0		/* ttl==0 in transit */
153*83ee113eSDavid van Moolenbroek #define		ICMP_TIMXCEED_REASS	1		/* ttl==0 in reass */
154*83ee113eSDavid van Moolenbroek #define	ICMP_PARAMPROB		12		/* ip header bad */
155*83ee113eSDavid van Moolenbroek #define		ICMP_PARAMPROB_OPTABSENT 1		/* req. opt. absent */
156*83ee113eSDavid van Moolenbroek #define	ICMP_TSTAMP		13		/* timestamp request */
157*83ee113eSDavid van Moolenbroek #define	ICMP_TSTAMPREPLY	14		/* timestamp reply */
158*83ee113eSDavid van Moolenbroek #define	ICMP_IREQ		15		/* information request */
159*83ee113eSDavid van Moolenbroek #define	ICMP_IREQREPLY		16		/* information reply */
160*83ee113eSDavid van Moolenbroek #define	ICMP_MASKREQ		17		/* address mask request */
161*83ee113eSDavid van Moolenbroek #define	ICMP_MASKREPLY		18		/* address mask reply */
162*83ee113eSDavid van Moolenbroek 
163*83ee113eSDavid van Moolenbroek #define	ICMP_MAXTYPE		18
164*83ee113eSDavid van Moolenbroek 
165*83ee113eSDavid van Moolenbroek #define	ICMP_INFOTYPE(type) \
166*83ee113eSDavid van Moolenbroek 	((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
167*83ee113eSDavid van Moolenbroek 	(type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \
168*83ee113eSDavid van Moolenbroek 	(type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
169*83ee113eSDavid van Moolenbroek 	(type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
170*83ee113eSDavid van Moolenbroek 	(type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
171*83ee113eSDavid van Moolenbroek 
172*83ee113eSDavid van Moolenbroek #ifdef _KERNEL
173*83ee113eSDavid van Moolenbroek void	icmp_error __P((struct mbuf *, int, int, n_long, struct ifnet *));
174*83ee113eSDavid van Moolenbroek void	icmp_input __P((struct mbuf *, ...));
175*83ee113eSDavid van Moolenbroek void	icmp_reflect __P((struct mbuf *));
176*83ee113eSDavid van Moolenbroek void	icmp_send __P((struct mbuf *, struct mbuf *));
177*83ee113eSDavid van Moolenbroek int	icmp_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
178*83ee113eSDavid van Moolenbroek #endif
179*83ee113eSDavid van Moolenbroek 
180