//==========================================================================////      include/netinet/icmp6.h////==========================================================================//####BSDCOPYRIGHTBEGIN####//// -------------------------------------------//// Portions of this software may have been derived from OpenBSD, // FreeBSD or other sources, and are covered by the appropriate// copyright disclaimers included herein.//// Portions created by Red Hat are// Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.//// -------------------------------------------////####BSDCOPYRIGHTEND####//==========================================================================/*	$KAME: icmp6.h,v 1.66 2001/12/18 02:19:14 jinmei Exp $	*//* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * 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. * 3. Neither the name of the project 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 PROJECT 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 PROJECT 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. *//* * 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. * 3. All advertising materials mentioning features or use of this software *    must display the following acknowledgement: *	This product includes software developed by the University of *	California, Berkeley and its contributors. * 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 */#ifndef _NETINET_ICMP6_H_#define _NETINET_ICMP6_H_#define ICMPV6_PLD_MAXLEN	1232	/* IPV6_MMTU - sizeof(struct ip6_hdr)					   - sizeof(struct icmp6_hdr) */struct icmp6_hdr {	u_int8_t	icmp6_type;	/* type field */	u_int8_t	icmp6_code;	/* code field */	u_int16_t	icmp6_cksum;	/* checksum field */	union {		u_int32_t	icmp6_un_data32[1]; /* type-specific field */		u_int16_t	icmp6_un_data16[2]; /* type-specific field */		u_int8_t	icmp6_un_data8[4];  /* type-specific field */	} icmp6_dataun;} __attribute__ ((aligned(1), packed));#define icmp6_data32	icmp6_dataun.icmp6_un_data32#define icmp6_data16	icmp6_dataun.icmp6_un_data16#define icmp6_data8	icmp6_dataun.icmp6_un_data8#define icmp6_pptr	icmp6_data32[0]		/* parameter prob */#define icmp6_mtu	icmp6_data32[0]		/* packet too big */#define icmp6_id	icmp6_data16[0]		/* echo request/reply */#define icmp6_seq	icmp6_data16[1]		/* echo request/reply */#define icmp6_maxdelay	icmp6_data16[0]		/* mcast group membership */#define ICMP6_DST_UNREACH		1	/* dest unreachable, codes: */#define ICMP6_PACKET_TOO_BIG		2	/* packet too big */#define ICMP6_TIME_EXCEEDED		3	/* time exceeded, code: */#define ICMP6_PARAM_PROB		4	/* ip6 header bad */#define ICMP6_ECHO_REQUEST		128	/* echo service */#define ICMP6_ECHO_REPLY		129	/* echo reply */#define ICMP6_MEMBERSHIP_QUERY		130	/* group membership query */#define MLD_LISTENER_QUERY		130 	/* multicast listener query */#define ICMP6_MEMBERSHIP_REPORT		131	/* group membership report */#define MLD_LISTENER_REPORT		131	/* multicast listener report */#define ICMP6_MEMBERSHIP_REDUCTION	132	/* group membership termination */#define MLD_LISTENER_DONE		132	/* multicast listener done */#ifndef _KERNEL/* the followings are for backward compatibility to old KAME apps. */#define MLD6_LISTENER_QUERY MLD_LISTENER_QUERY#define MLD6_LISTENER_REPORT MLD_LISTENER_REPORT#define MLD6_LISTENER_DONE MLD_LISTENER_DONE#endif#define ND_ROUTER_SOLICIT		133	/* router solicitation */#define ND_ROUTER_ADVERT		134	/* router advertisment */#define ND_NEIGHBOR_SOLICIT		135	/* neighbor solicitation */#define ND_NEIGHBOR_ADVERT		136	/* neighbor advertisment */#define ND_REDIRECT			137	/* redirect */#define ICMP6_ROUTER_RENUMBERING	138	/* router renumbering */#define ICMP6_WRUREQUEST		139	/* who are you request */#define ICMP6_WRUREPLY			140	/* who are you reply */#define ICMP6_FQDN_QUERY		139	/* FQDN query */#define ICMP6_FQDN_REPLY		140	/* FQDN reply */#define ICMP6_NI_QUERY			139	/* node information request */#define ICMP6_NI_REPLY			140	/* node information reply *//* The belows are not yet defined in 2292bis. They will be renamed */#define IND_SOLICIT			141	/* inverse neighbor solicitation */#define IND_ADVERT			142	/* inverse neighbor advertisment *//* Folloing numbers are defined in the mobile-ip draft. */#define ICMP6_HADISCOV_REQUEST		150	/* XXX To be authorized */#define ICMP6_HADISCOV_REPLY		151	/* XXX To be authorized */#define ICMP6_MOBILEPREFIX_SOLICIT	152	/* XXX To be authorized */#define ICMP6_MOBILEPREFIX_ADVERT	153	/* XXX To be authorized *//* The definitions below are experimental. TBA */#define MLD_MTRACE_RESP			200	/* mtrace resp (to sender) */#define MLD_MTRACE			201	/* mtrace messages */#define MLDV2_LISTENER_REPORT		206	/* MLDv2 report */ #ifndef _KERNEL#define MLD6_MTRACE_RESP	MLD_MTRACE_RESP#define MLD6_MTRACE		MLD_MTRACE#define MLD6V2_LISTENER_REPORT	MLDV2_LISTENER_REPORT#endif#define ICMP6_MAXTYPE			206#define ICMP6_DST_UNREACH_NOROUTE	0	/* no route to destination */#define ICMP6_DST_UNREACH_ADMIN	 	1	/* administratively prohibited */#define ICMP6_DST_UNREACH_NOTNEIGHBOR	2	/* not a neighbor(obsolete) */#define ICMP6_DST_UNREACH_BEYONDSCOPE	2	/* beyond scope of source address */#define ICMP6_DST_UNREACH_ADDR		3	/* address unreachable */#define ICMP6_DST_UNREACH_NOPORT	4	/* port unreachable */#define ICMP6_TIME_EXCEED_TRANSIT 	0	/* ttl==0 in transit */#define ICMP6_TIME_EXCEED_REASSEMBLY	1	/* ttl==0 in reass */#define ICMP6_PARAMPROB_HEADER 	 	0	/* erroneous header field */#define ICMP6_PARAMPROB_NEXTHEADER	1	/* unrecognized next header */#define ICMP6_PARAMPROB_OPTION		2	/* unrecognized option */#define ICMP6_INFOMSG_MASK		0x80	/* all informational messages */#define ICMP6_NI_SUBJ_IPV6	0	/* Query Subject is an IPv6 address */#define ICMP6_NI_SUBJ_FQDN	1	/* Query Subject is a Domain name */#define ICMP6_NI_SUBJ_IPV4	2	/* Query Subject is an IPv4 address */#define ICMP6_NI_SUCCESS	0	/* node information successful reply */#define ICMP6_NI_REFUSED	1	/* node information request is refused */#define ICMP6_NI_UNKNOWN	2	/* unknown Qtype */#define ICMP6_ROUTER_RENUMBERING_COMMAND  0	/* rr command */#define ICMP6_ROUTER_RENUMBERING_RESULT   1	/* rr result */#define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET   255	/* rr seq num reset *//* Used in kernel only */#define ND_REDIRECT_ONLINK	0	/* redirect to an on-link node */#define ND_REDIRECT_ROUTER	1	/* redirect to a better router *//* * Multicast Listener Discovery */struct mld_hdr {	struct icmp6_hdr	mld_icmp6_hdr;	struct in6_addr		mld_addr; /* multicast address */} __attribute__ ((aligned(1), packed));/* definitions to provide backward compatibility to old KAME applications */#ifndef _KERNEL#define mld6_hdr	mld_hdr#define mld6_type	mld_type#define mld6_code	mld_code#define mld6_cksum	mld_cksum#define mld6_maxdelay	mld_maxdelay#define mld6_reserved	mld_reserved#define mld6_addr	mld_addr#endif/* shortcut macro definitions */#define mld_type	mld_icmp6_hdr.icmp6_type#define mld_code	mld_icmp6_hdr.icmp6_code#define mld_cksum	mld_icmp6_hdr.icmp6_cksum#define mld_maxdelay	mld_icmp6_hdr.icmp6_data16[0]#define mld_reserved	mld_icmp6_hdr.icmp6_data16[1]/* * Neighbor Discovery */struct nd_router_solicit {	/* router solicitation */	struct icmp6_hdr 	nd_rs_hdr;	/* could be followed by options */} __attribute__ ((aligned(1), packed));#define nd_rs_type	nd_rs_hdr.icmp6_type#define nd_rs_code	nd_rs_hdr.icmp6_code#define nd_rs_cksum	nd_rs_hdr.icmp6_cksum#define nd_rs_reserved	nd_rs_hdr.icmp6_data32[0]struct nd_router_advert {	/* router advertisement */	struct icmp6_hdr	nd_ra_hdr;	u_int32_t		nd_ra_reachable;	/* reachable time */	u_int32_t		nd_ra_retransmit;	/* retransmit timer */	/* could be followed by options */} __attribute__ ((aligned(1), packed));#define nd_ra_type		nd_ra_hdr.icmp6_type#define nd_ra_code		nd_ra_hdr.icmp6_code#define nd_ra_cksum		nd_ra_hdr.icmp6_cksum#define nd_ra_curhoplimit	nd_ra_hdr.icmp6_data8[0]#define nd_ra_flags_reserved	nd_ra_hdr.icmp6_data8[1]#define ND_RA_FLAG_MANAGED	0x80#define ND_RA_FLAG_OTHER	0x40#define ND_RA_FLAG_HOME_AGENT	0x20/* * Router preference values based on draft-draves-ipngwg-router-selection-01. * These are non-standard definitions. */#define ND_RA_FLAG_RTPREF_MASK	0x18 /* 00011000 */#define ND_RA_FLAG_RTPREF_HIGH	0x08 /* 00001000 */#define ND_RA_FLAG_RTPREF_MEDIUM	0x00 /* 00000000 */#define ND_RA_FLAG_RTPREF_LOW	0x18 /* 00011000 */#define ND_RA_FLAG_RTPREF_RSV	0x10 /* 00010000 */#define nd_ra_router_lifetime	nd_ra_hdr.icmp6_data16[1]struct nd_neighbor_solicit {	/* neighbor solicitation */	struct icmp6_hdr	nd_ns_hdr;	struct in6_addr		nd_ns_target;	/*target address */	/* could be followed by options */} __attribute__((aligned(1), packed));#define nd_ns_type		nd_ns_hdr.icmp6_type#define nd_ns_code		nd_ns_hdr.icmp6_code#define nd_ns_cksum		nd_ns_hdr.icmp6_cksum#define nd_ns_reserved		nd_ns_hdr.icmp6_data32[0]struct nd_neighbor_advert {	/* neighbor advertisement */	struct icmp6_hdr	nd_na_hdr;	struct in6_addr		nd_na_target;	/* target address */	/* could be followed by options */} __attribute__((aligned(1), packed));#define nd_na_type		nd_na_hdr.icmp6_type#define nd_na_code		nd_na_hdr.icmp6_code#define nd_na_cksum		nd_na_hdr.icmp6_cksum#define nd_na_flags_reserved	nd_na_hdr.icmp6_data32[0]#if BYTE_ORDER == BIG_ENDIAN#define ND_NA_FLAG_ROUTER		0x80000000