/* Copyright (C) 1991, 92, 93, 95, 96, 97, 99 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, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  */#ifndef __NETINET_IP_ICMP_H#define __NETINET_IP_ICMP_H    1#include <sys/cdefs.h>#include <sys/types.h>__BEGIN_DECLSstruct icmphdr{  u_int8_t type;		/* message type */  u_int8_t code;		/* type sub-code */  u_int16_t checksum;  union  {    struct    {      u_int16_t	id;      u_int16_t	sequence;    } echo;			/* echo datagram */    u_int32_t	gateway;	/* gateway address */    struct    {      u_int16_t	__unused;      u_int16_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_BSD/* * 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{  u_int32_t ira_addr;  u_int32_t ira_preference;};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 checksum of struct */  union  {    u_char ih_pptr;		/* ICMP_PARAMPROB */    struct in_addr ih_gwaddr;	/* gateway address */    struct ih_idseq		/* echo datagram */    {      u_int16_t icd_id;      u_int16_t icd_seq;    } ih_idseq;    u_int32_t ih_void;    /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */    struct ih_pmtu    {      u_int16_t ipm_void;      u_int16_t ipm_nextmtu;    } ih_pmtu;    struct ih_rtradv    {      u_int8_t irt_num_addrs;      u_int8_t irt_wpa;      u_int16_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    {      u_int32_t its_otime;      u_int32_t its_rtime;      u_int32_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;    u_int32_t   id_mask;    u_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_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_BSD */__END_DECLS#endif /* netinet/ip_icmp.h */