[thirdparty/glibc.git] / sysdeps / gnu / netinet / ip_icmp.h

/* Copyright (C) 1991-2017 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#ifndef __NETINET_IP_ICMP_H
#define __NETINET_IP_ICMP_H    1

#include <sys/types.h>
#include <stdint.h>

__BEGIN_DECLS

struct icmphdr
{
  uint8_t type;		/* message type */
  uint8_t code;		/* type sub-code */
  uint16_t checksum;
  union
  {
    struct
    {
      uint16_t	id;
      uint16_t	sequence;
    } echo;			/* echo datagram */
    uint32_t	gateway;	/* gateway address */
    struct
    {
      uint16_t	__glibc_reserved;
      uint16_t	mtu;
    } frag;			/* path mtu discovery */
  } un;
};

#define ICMP_ECHOREPLY		0	/* Echo Reply			*/
#define ICMP_DEST_UNREACH	3	/* Destination Unreachable	*/
#define ICMP_SOURCE_QUENCH	4	/* Source Quench		*/
#define ICMP_REDIRECT		5	/* Redirect (change route)	*/
#define ICMP_ECHO		8	/* Echo Request			*/
#define ICMP_TIME_EXCEEDED	11	/* Time Exceeded		*/
#define ICMP_PARAMETERPROB	12	/* Parameter Problem		*/
#define ICMP_TIMESTAMP		13	/* Timestamp Request		*/
#define ICMP_TIMESTAMPREPLY	14	/* Timestamp Reply		*/
#define ICMP_INFO_REQUEST	15	/* Information Request		*/
#define ICMP_INFO_REPLY		16	/* Information Reply		*/
#define ICMP_ADDRESS		17	/* Address Mask Request		*/
#define ICMP_ADDRESSREPLY	18	/* Address Mask Reply		*/
#define NR_ICMP_TYPES		18


/* Codes for UNREACH. */
#define ICMP_NET_UNREACH	0	/* Network Unreachable		*/
#define ICMP_HOST_UNREACH	1	/* Host Unreachable		*/
#define ICMP_PROT_UNREACH	2	/* Protocol Unreachable		*/
#define ICMP_PORT_UNREACH	3	/* Port Unreachable		*/
#define ICMP_FRAG_NEEDED	4	/* Fragmentation Needed/DF set	*/
#define ICMP_SR_FAILED		5	/* Source Route failed		*/
#define ICMP_NET_UNKNOWN	6
#define ICMP_HOST_UNKNOWN	7
#define ICMP_HOST_ISOLATED	8
#define ICMP_NET_ANO		9
#define ICMP_HOST_ANO		10
#define ICMP_NET_UNR_TOS	11
#define ICMP_HOST_UNR_TOS	12
#define ICMP_PKT_FILTERED	13	/* Packet filtered */
#define ICMP_PREC_VIOLATION	14	/* Precedence violation */
#define ICMP_PREC_CUTOFF	15	/* Precedence cut off */
#define NR_ICMP_UNREACH		15	/* instead of hardcoding immediate value */

/* Codes for REDIRECT. */
#define ICMP_REDIR_NET		0	/* Redirect Net			*/
#define ICMP_REDIR_HOST		1	/* Redirect Host		*/
#define ICMP_REDIR_NETTOS	2	/* Redirect Net for TOS		*/
#define ICMP_REDIR_HOSTTOS	3	/* Redirect Host for TOS	*/

/* Codes for TIME_EXCEEDED. */
#define ICMP_EXC_TTL		0	/* TTL count exceeded		*/
#define ICMP_EXC_FRAGTIME	1	/* Fragment Reass time exceeded	*/


#ifdef __USE_MISC
/*
 * 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.
 * 4. 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
 */

#include <netinet/in.h>
#include <netinet/ip.h>

/*
 * Internal of an ICMP Router Advertisement
 */
struct icmp_ra_addr
{
  uint32_t ira_addr;
  uint32_t ira_preference;
};

struct icmp
{
  uint8_t  icmp_type;	/* type of message, see below */
  uint8_t  icmp_code;	/* type sub code */
  uint16_t icmp_cksum;	/* ones complement checksum of struct */
  union
  {
    unsigned char ih_pptr;	/* ICMP_PARAMPROB */
    struct in_addr ih_gwaddr;	/* gateway address */
    struct ih_idseq		/* echo datagram */
    {
      uint16_t icd_id;
      uint16_t icd_seq;
    } ih_idseq;
    uint32_t ih_void;

    /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
    struct ih_pmtu
    {
      uint16_t ipm_void;
      uint16_t ipm_nextmtu;
    } ih_pmtu;

    struct ih_rtradv
    {
      uint8_t irt_num_addrs;
      uint8_t irt_wpa;
      uint16_t irt_lifetime;
    } ih_rtradv;
  } icmp_hun;
#define	icmp_pptr	icmp_hun.ih_pptr
#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
    {
      uint32_t its_otime;
      uint32_t its_rtime;
      uint32_t its_ttime;
    } id_ts;
    struct
    {
      struct ip idi_ip;
      /* options and then 64 bits of data */
    } id_ip;
    struct icmp_ra_addr id_radv;
    uint32_t   id_mask;
    uint8_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_radv	icmp_dun.id_radv
#define	icmp_mask	icmp_dun.id_mask
#define	icmp_data	icmp_dun.id_data
};

/*
 * 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 */
#ifndef _IP_VHL
#define	ICMP_ADVLEN(p)	(8 + ((p)->icmp_ip.ip_hl << 2) + 8)
	/* N.B.: must separately check that ip_hl >= 5 */
#else
#define	ICMP_ADVLEN(p)	(8 + (IP_VHL_HL((p)->icmp_ip.ip_vhl) << 2) + 8)
	/* N.B.: must separately check that header length >= 5 */
#endif

/* Definition of type and code fields. */
/* defined above: ICMP_ECHOREPLY, ICMP_REDIRECT, ICMP_ECHO */
#define	ICMP_UNREACH		3		/* dest unreachable, codes: */
#define	ICMP_SOURCEQUENCH	4		/* packet lost, slow down */
#define	ICMP_ROUTERADVERT	9		/* router advertisement */
#define	ICMP_ROUTERSOLICIT	10		/* router solicitation */
#define	ICMP_TIMXCEED		11		/* time exceeded, code: */
#define	ICMP_PARAMPROB		12		/* ip header bad */
#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_MAXTYPE		18

/* UNREACH 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	/* net denied */
#define	ICMP_UNREACH_HOST_PROHIB        10	/* host denied */
#define	ICMP_UNREACH_TOSNET	        11	/* bad tos for net */
#define	ICMP_UNREACH_TOSHOST	        12	/* bad tos for host */
#define	ICMP_UNREACH_FILTER_PROHIB      13	/* admin prohib */
#define	ICMP_UNREACH_HOST_PRECEDENCE    14	/* host prec vio. */
#define	ICMP_UNREACH_PRECEDENCE_CUTOFF  15	/* prec cutoff */

/* REDIRECT 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 */

/* TIMEXCEED codes */
#define	ICMP_TIMXCEED_INTRANS	0		/* ttl==0 in transit */
#define	ICMP_TIMXCEED_REASS	1		/* ttl==0 in reass */

/* PARAMPROB code */
#define	ICMP_PARAMPROB_OPTABSENT 1		/* req. opt. absent */

#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)

#endif /* __USE_MISC */

__END_DECLS

#endif /* netinet/ip_icmp.h */
Commit	Line	Data
bfff8b1b	1	/* Copyright (C) 1991-2017 Free Software Foundation, Inc.
1fb05e3d UD	2	This file is part of the GNU C Library.
	3
	4	The GNU C Library is free software; you can redistribute it and/or
41bdb6e2 AJ	5	modify it under the terms of the GNU Lesser General Public
	6	License as published by the Free Software Foundation; either
	7	version 2.1 of the License, or (at your option) any later version.
1fb05e3d UD	8
	9	The GNU C Library is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2	12	Lesser General Public License for more details.
1fb05e3d	13
41bdb6e2	14	You should have received a copy of the GNU Lesser General Public
59ba27a6 PE	15	License along with the GNU C Library; if not, see
59ba27a6 PE	16	<http://www.gnu.org/licenses/>. */
1fb05e3d UD	17
	18	#ifndef __NETINET_IP_ICMP_H
	19	#define __NETINET_IP_ICMP_H 1
	20
1fb05e3d	21	#include <sys/types.h>
11160cb7	22	#include <stdint.h>
1fb05e3d UD	23
	24	__BEGIN_DECLS
	25
5929563f UD	26	struct icmphdr
5929563f UD	27	{
11160cb7 ZW	28	uint8_t type; /* message type */
	29	uint8_t code; /* type sub-code */
	30	uint16_t checksum;
5929563f UD	31	union
	32	{
	33	struct
	34	{
11160cb7 ZW	35	uint16_t id;
11160cb7 ZW	36	uint16_t sequence;
5929563f	37	} echo; /* echo datagram */
11160cb7	38	uint32_t gateway; /* gateway address */
5929563f UD	39	struct
5929563f UD	40	{
11160cb7 ZW	41	uint16_t __glibc_reserved;
11160cb7 ZW	42	uint16_t mtu;
5929563f UD	43	} frag; /* path mtu discovery */
	44	} un;
	45	};
	46
	47	#define ICMP_ECHOREPLY 0 /* Echo Reply */
	48	#define ICMP_DEST_UNREACH 3 /* Destination Unreachable */
	49	#define ICMP_SOURCE_QUENCH 4 /* Source Quench */
	50	#define ICMP_REDIRECT 5 /* Redirect (change route) */
	51	#define ICMP_ECHO 8 /* Echo Request */
	52	#define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */
	53	#define ICMP_PARAMETERPROB 12 /* Parameter Problem */
	54	#define ICMP_TIMESTAMP 13 /* Timestamp Request */
	55	#define ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */
	56	#define ICMP_INFO_REQUEST 15 /* Information Request */
	57	#define ICMP_INFO_REPLY 16 /* Information Reply */
	58	#define ICMP_ADDRESS 17 /* Address Mask Request */
	59	#define ICMP_ADDRESSREPLY 18 /* Address Mask Reply */
	60	#define NR_ICMP_TYPES 18
	61
	62
	63	/* Codes for UNREACH. */
	64	#define ICMP_NET_UNREACH 0 /* Network Unreachable */
	65	#define ICMP_HOST_UNREACH 1 /* Host Unreachable */
	66	#define ICMP_PROT_UNREACH 2 /* Protocol Unreachable */
	67	#define ICMP_PORT_UNREACH 3 /* Port Unreachable */
	68	#define ICMP_FRAG_NEEDED 4 /* Fragmentation Needed/DF set */
	69	#define ICMP_SR_FAILED 5 /* Source Route failed */
	70	#define ICMP_NET_UNKNOWN 6
	71	#define ICMP_HOST_UNKNOWN 7
	72	#define ICMP_HOST_ISOLATED 8
	73	#define ICMP_NET_ANO 9
	74	#define ICMP_HOST_ANO 10
	75	#define ICMP_NET_UNR_TOS 11
	76	#define ICMP_HOST_UNR_TOS 12
	77	#define ICMP_PKT_FILTERED 13 /* Packet filtered */
	78	#define ICMP_PREC_VIOLATION 14 /* Precedence violation */
	79	#define ICMP_PREC_CUTOFF 15 /* Precedence cut off */
	80	#define NR_ICMP_UNREACH 15 /* instead of hardcoding immediate value */
	81
	82	/* Codes for REDIRECT. */
	83	#define ICMP_REDIR_NET 0 /* Redirect Net */
	84	#define ICMP_REDIR_HOST 1 /* Redirect Host */
	85	#define ICMP_REDIR_NETTOS 2 /* Redirect Net for TOS */
	86	#define ICMP_REDIR_HOSTTOS 3 /* Redirect Host for TOS */
	87
	88	/* Codes for TIME_EXCEEDED. */
	89	#define ICMP_EXC_TTL 0 /* TTL count exceeded */
	90	#define ICMP_EXC_FRAGTIME 1 /* Fragment Reass time exceeded */
	91
	92
498afc54	93	#ifdef __USE_MISC
1fb05e3d UD	94	/*
	95	* Copyright (c) 1982, 1986, 1993
	96	* The Regents of the University of California. All rights reserved.
	97	*
	98	* Redistribution and use in source and binary forms, with or without
	99	* modification, are permitted provided that the following conditions
	100	* are met:
	101	* 1. Redistributions of source code must retain the above copyright
	102	* notice, this list of conditions and the following disclaimer.
	103	* 2. Redistributions in binary form must reproduce the above copyright
	104	* notice, this list of conditions and the following disclaimer in the
	105	* documentation and/or other materials provided with the distribution.
1fb05e3d UD	106	* 4. Neither the name of the University nor the names of its contributors
	107	* may be used to endorse or promote products derived from this software
	108	* without specific prior written permission.
	109	*
	110	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	111	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	112	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	113	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	114	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	115	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	116	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	117	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	118	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	119	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	120	* SUCH DAMAGE.
	121	*
	122	* @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93
	123	*/
	124
	125	#include <netinet/in.h>
	126	#include <netinet/ip.h>
	127
	128	/*
	129	* Internal of an ICMP Router Advertisement
	130	*/
5929563f UD	131	struct icmp_ra_addr
5929563f UD	132	{
11160cb7 ZW	133	uint32_t ira_addr;
11160cb7 ZW	134	uint32_t ira_preference;
1fb05e3d UD	135	};
1fb05e3d UD	136
5929563f UD	137	struct icmp
5929563f UD	138	{
11160cb7 ZW	139	uint8_t icmp_type; /* type of message, see below */
	140	uint8_t icmp_code; /* type sub code */
	141	uint16_t icmp_cksum; /* ones complement checksum of struct */
5929563f UD	142	union
5929563f UD	143	{
11160cb7	144	unsigned char ih_pptr; /* ICMP_PARAMPROB */
1fb05e3d	145	struct in_addr ih_gwaddr; /* gateway address */
5929563f UD	146	struct ih_idseq /* echo datagram */
5929563f UD	147	{
11160cb7 ZW	148	uint16_t icd_id;
11160cb7 ZW	149	uint16_t icd_seq;
1fb05e3d	150	} ih_idseq;
11160cb7	151	uint32_t ih_void;
1fb05e3d UD	152
1fb05e3d UD	153	/* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
5929563f UD	154	struct ih_pmtu
5929563f UD	155	{
11160cb7 ZW	156	uint16_t ipm_void;
11160cb7 ZW	157	uint16_t ipm_nextmtu;
1fb05e3d UD	158	} ih_pmtu;
1fb05e3d UD	159
5929563f UD	160	struct ih_rtradv
5929563f UD	161	{
11160cb7 ZW	162	uint8_t irt_num_addrs;
	163	uint8_t irt_wpa;
	164	uint16_t irt_lifetime;
1fb05e3d UD	165	} ih_rtradv;
	166	} icmp_hun;
	167	#define icmp_pptr icmp_hun.ih_pptr
	168	#define icmp_gwaddr icmp_hun.ih_gwaddr
	169	#define icmp_id icmp_hun.ih_idseq.icd_id
	170	#define icmp_seq icmp_hun.ih_idseq.icd_seq
	171	#define icmp_void icmp_hun.ih_void
	172	#define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void
	173	#define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu
	174	#define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs
	175	#define icmp_wpa icmp_hun.ih_rtradv.irt_wpa
	176	#define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime
5929563f UD	177	union
	178	{
	179	struct
	180	{
11160cb7 ZW	181	uint32_t its_otime;
	182	uint32_t its_rtime;
	183	uint32_t its_ttime;
1fb05e3d	184	} id_ts;
5929563f UD	185	struct
5929563f UD	186	{
1fb05e3d UD	187	struct ip idi_ip;
	188	/* options and then 64 bits of data */
	189	} id_ip;
	190	struct icmp_ra_addr id_radv;
11160cb7 ZW	191	uint32_t id_mask;
11160cb7 ZW	192	uint8_t id_data[1];
1fb05e3d UD	193	} icmp_dun;
	194	#define icmp_otime icmp_dun.id_ts.its_otime
	195	#define icmp_rtime icmp_dun.id_ts.its_rtime
	196	#define icmp_ttime icmp_dun.id_ts.its_ttime
	197	#define icmp_ip icmp_dun.id_ip.idi_ip
	198	#define icmp_radv icmp_dun.id_radv
	199	#define icmp_mask icmp_dun.id_mask
	200	#define icmp_data icmp_dun.id_data
	201	};
	202
	203	/*
	204	* Lower bounds on packet lengths for various types.
	205	* For the error advice packets must first insure that the
	206	* packet is large enough to contain the returned ip header.
	207	* Only then can we do the check to see if 64 bits of packet
	208	* data have been returned, since we need to check the returned
	209	* ip header length.
	210	*/
	211	#define ICMP_MINLEN 8 /* abs minimum */
	212	#define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */
	213	#define ICMP_MASKLEN 12 /* address mask */
	214	#define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */
	215	#ifndef _IP_VHL
	216	#define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
	217	/* N.B.: must separately check that ip_hl >= 5 */
	218	#else
	219	#define ICMP_ADVLEN(p) (8 + (IP_VHL_HL((p)->icmp_ip.ip_vhl) << 2) + 8)
	220	/* N.B.: must separately check that header length >= 5 */
	221	#endif
	222
	223	/* Definition of type and code fields. */
5929563f	224	/* defined above: ICMP_ECHOREPLY, ICMP_REDIRECT, ICMP_ECHO */
1fb05e3d UD	225	#define ICMP_UNREACH 3 /* dest unreachable, codes: */
1fb05e3d UD	226	#define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */
1fb05e3d UD	227	#define ICMP_ROUTERADVERT 9 /* router advertisement */
	228	#define ICMP_ROUTERSOLICIT 10 /* router solicitation */
	229	#define ICMP_TIMXCEED 11 /* time exceeded, code: */
	230	#define ICMP_PARAMPROB 12 /* ip header bad */
	231	#define ICMP_TSTAMP 13 /* timestamp request */
	232	#define ICMP_TSTAMPREPLY 14 /* timestamp reply */
	233	#define ICMP_IREQ 15 /* information request */
	234	#define ICMP_IREQREPLY 16 /* information reply */
	235	#define ICMP_MASKREQ 17 /* address mask request */
	236	#define ICMP_MASKREPLY 18 /* address mask reply */
	237
	238	#define ICMP_MAXTYPE 18
	239
	240	/* UNREACH codes */
	241	#define ICMP_UNREACH_NET 0 /* bad net */
	242	#define ICMP_UNREACH_HOST 1 /* bad host */
	243	#define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */
	244	#define ICMP_UNREACH_PORT 3 /* bad port */
	245	#define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */
	246	#define ICMP_UNREACH_SRCFAIL 5 /* src route failed */
	247	#define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */
	248	#define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */
	249	#define ICMP_UNREACH_ISOLATED 8 /* src host isolated */
	250	#define ICMP_UNREACH_NET_PROHIB 9 /* net denied */
	251	#define ICMP_UNREACH_HOST_PROHIB 10 /* host denied */
	252	#define ICMP_UNREACH_TOSNET 11 /* bad tos for net */
	253	#define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */
	254	#define ICMP_UNREACH_FILTER_PROHIB 13 /* admin prohib */
	255	#define ICMP_UNREACH_HOST_PRECEDENCE 14 /* host prec vio. */
	256	#define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* prec cutoff */
	257
	258	/* REDIRECT codes */
	259	#define ICMP_REDIRECT_NET 0 /* for network */
	260	#define ICMP_REDIRECT_HOST 1 /* for host */
	261	#define ICMP_REDIRECT_TOSNET 2 /* for tos and net */
	262	#define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */
	263
	264	/* TIMEXCEED codes */
	265	#define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */
	266	#define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */
	267
	268	/* PARAMPROB code */
	269	#define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */
	270
	271	#define ICMP_INFOTYPE(type) \
	272	((type) == ICMP_ECHOREPLY \|\| (type) == ICMP_ECHO \|\| \
	273	(type) == ICMP_ROUTERADVERT \|\| (type) == ICMP_ROUTERSOLICIT \|\| \
	274	(type) == ICMP_TSTAMP \|\| (type) == ICMP_TSTAMPREPLY \|\| \
	275	(type) == ICMP_IREQ \|\| (type) == ICMP_IREQREPLY \|\| \
	276	(type) == ICMP_MASKREQ \|\| (type) == ICMP_MASKREPLY)
	277
498afc54	278	#endif /* __USE_MISC */
5929563f	279
1fb05e3d UD	280	__END_DECLS
	281
	282	#endif /* netinet/ip_icmp.h */