/*	$FreeBSD: src/sys/netinet6/in6_var.h,v 1.21.2.1 2005/08/24 15:18:38 rwatson Exp $	*/

/*	$KAME: in6_var.h,v 1.56 2001/03/29 05:34:31 itojun Exp $	*/

/*-

 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.

 * All rights reserved.

* © Portions copyright (c) 2007 Symbian Software Ltd. 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) 1985, 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.

 *

 *	@(#)in_var.h	8.1 (Berkeley) 6/10/93

 */

#ifndef _NETINET6_IN6_VAR_H_

#define _NETINET6_IN6_VAR_H_

/*

 * Interface address, Internet version.  One of these structures

 * is allocated for each interface with an Internet address.

 * The ifaddr structure contains the protocol-independent part

 * of the structure and is assumed to be first.

 */

/*

 * pltime/vltime are just for future reference (required to implements 2

 * hour rule for hosts).  they should never be modified by nd6_timeout or

 * anywhere else.

 *	userland -> kernel: accept pltime/vltime

 *	kernel -> userland: throw up everything

 *	in kernel: modify preferred/expire only

 */

struct in6_addrlifetime {

	time_t ia6t_expire;	/* valid lifetime expiration time */

	time_t ia6t_preferred;	/* preferred lifetime expiration time */

	u_int32_t ia6t_vltime;	/* valid lifetime */

	u_int32_t ia6t_pltime;	/* prefix lifetime */

};

struct nd_ifinfo;

struct scope6_id;

struct in6_ifextra {

	struct in6_ifstat *in6_ifstat;

	struct icmp6_ifstat *icmp6_ifstat;

	struct nd_ifinfo *nd_ifinfo;

	struct scope6_id *scope6_id;

};

#ifndef __SYMBIAN32__

/*

 * XXX: removing dependency on ifaddr for getaddrinfo()

 */

struct	in6_ifaddr {

	struct	ifaddr ia_ifa;		/* protocol-independent info */

#define	ia_ifp		ia_ifa.ifa_ifp

#define ia_flags	ia_ifa.ifa_flags

	struct	sockaddr_in6 ia_addr;	/* interface address */

	struct	sockaddr_in6 ia_net;	/* network number of interface */

	struct	sockaddr_in6 ia_dstaddr; /* space for destination addr */

	struct	sockaddr_in6 ia_prefixmask; /* prefix mask */

	u_int32_t ia_plen;		/* prefix length */

	struct	in6_ifaddr *ia_next;	/* next in6 list of IP6 addresses */

	int	ia6_flags;

	struct in6_addrlifetime ia6_lifetime;

	struct ifprefix *ia6_ifpr; /* back pointer to ifprefix */

	/* back pointer to the ND prefix (for autoconfigured addresses only) */

	struct nd_prefix *ia6_ndpr;

};

#endif //__SYMBIAN32__

/* control structure to manage address selection policy */

struct in6_addrpolicy {

	struct sockaddr_in6 addr; /* prefix address */

	struct sockaddr_in6 addrmask; /* prefix mask */

	int preced;		/* precedence */

	int label;		/* matching label */

	u_quad_t use;		/* statistics */

};

/*

 * IPv6 interface statistics, as defined in RFC2465 Ipv6IfStatsEntry (p12).

 */

struct in6_ifstat {

	u_quad_t ifs6_in_receive;	/* # of total input datagram */

	u_quad_t ifs6_in_hdrerr;	/* # of datagrams with invalid hdr */

	u_quad_t ifs6_in_toobig;	/* # of datagrams exceeded MTU */

	u_quad_t ifs6_in_noroute;	/* # of datagrams with no route */

	u_quad_t ifs6_in_addrerr;	/* # of datagrams with invalid dst */

	u_quad_t ifs6_in_protounknown;	/* # of datagrams with unknown proto */

					/* NOTE: increment on final dst if */

	u_quad_t ifs6_in_truncated;	/* # of truncated datagrams */

	u_quad_t ifs6_in_discard;	/* # of discarded datagrams */

					/* NOTE: fragment timeout is not here */

	u_quad_t ifs6_in_deliver;	/* # of datagrams delivered to ULP */

					/* NOTE: increment on final dst if */

	u_quad_t ifs6_out_forward;	/* # of datagrams forwarded */

					/* NOTE: increment on outgoing if */

	u_quad_t ifs6_out_request;	/* # of outgoing datagrams from ULP */

					/* NOTE: does not include forwrads */

	u_quad_t ifs6_out_discard;	/* # of discarded datagrams */

	u_quad_t ifs6_out_fragok;	/* # of datagrams fragmented */

	u_quad_t ifs6_out_fragfail;	/* # of datagrams failed on fragment */

	u_quad_t ifs6_out_fragcreat;	/* # of fragment datagrams */

					/* NOTE: this is # after fragment */

	u_quad_t ifs6_reass_reqd;	/* # of incoming fragmented packets */

					/* NOTE: increment on final dst if */

	u_quad_t ifs6_reass_ok;		/* # of reassembled packets */

					/* NOTE: this is # after reass */

					/* NOTE: increment on final dst if */

	u_quad_t ifs6_reass_fail;	/* # of reass failures */

					/* NOTE: may not be packet count */

					/* NOTE: increment on final dst if */

	u_quad_t ifs6_in_mcast;		/* # of inbound multicast datagrams */

	u_quad_t ifs6_out_mcast;	/* # of outbound multicast datagrams */

};

/*

 * ICMPv6 interface statistics, as defined in RFC2466 Ipv6IfIcmpEntry.

 * XXX: I'm not sure if this file is the right place for this structure...

 */

struct icmp6_ifstat {

	/*

	 * Input statistics

	 */

	/* ipv6IfIcmpInMsgs, total # of input messages */

	u_quad_t ifs6_in_msg;

	/* ipv6IfIcmpInErrors, # of input error messages */

	u_quad_t ifs6_in_error;

	/* ipv6IfIcmpInDestUnreachs, # of input dest unreach errors */

	u_quad_t ifs6_in_dstunreach;

	/* ipv6IfIcmpInAdminProhibs, # of input administratively prohibited errs */

	u_quad_t ifs6_in_adminprohib;

	/* ipv6IfIcmpInTimeExcds, # of input time exceeded errors */

	u_quad_t ifs6_in_timeexceed;

	/* ipv6IfIcmpInParmProblems, # of input parameter problem errors */

	u_quad_t ifs6_in_paramprob;

	/* ipv6IfIcmpInPktTooBigs, # of input packet too big errors */

	u_quad_t ifs6_in_pkttoobig;

	/* ipv6IfIcmpInEchos, # of input echo requests */

	u_quad_t ifs6_in_echo;

	/* ipv6IfIcmpInEchoReplies, # of input echo replies */

	u_quad_t ifs6_in_echoreply;

	/* ipv6IfIcmpInRouterSolicits, # of input router solicitations */

	u_quad_t ifs6_in_routersolicit;

	/* ipv6IfIcmpInRouterAdvertisements, # of input router advertisements */

	u_quad_t ifs6_in_routeradvert;

	/* ipv6IfIcmpInNeighborSolicits, # of input neighbor solicitations */

	u_quad_t ifs6_in_neighborsolicit;

	/* ipv6IfIcmpInNeighborAdvertisements, # of input neighbor advertisements */

	u_quad_t ifs6_in_neighboradvert;

	/* ipv6IfIcmpInRedirects, # of input redirects */

	u_quad_t ifs6_in_redirect;

	/* ipv6IfIcmpInGroupMembQueries, # of input MLD queries */

	u_quad_t ifs6_in_mldquery;

	/* ipv6IfIcmpInGroupMembResponses, # of input MLD reports */

	u_quad_t ifs6_in_mldreport;

	/* ipv6IfIcmpInGroupMembReductions, # of input MLD done */

	u_quad_t ifs6_in_mlddone;

	/*

	 * Output statistics. We should solve unresolved routing problem...

	 */

	/* ipv6IfIcmpOutMsgs, total # of output messages */

	u_quad_t ifs6_out_msg;

	/* ipv6IfIcmpOutErrors, # of output error messages */

	u_quad_t ifs6_out_error;

	/* ipv6IfIcmpOutDestUnreachs, # of output dest unreach errors */

	u_quad_t ifs6_out_dstunreach;

	/* ipv6IfIcmpOutAdminProhibs, # of output administratively prohibited errs */

	u_quad_t ifs6_out_adminprohib;

	/* ipv6IfIcmpOutTimeExcds, # of output time exceeded errors */

	u_quad_t ifs6_out_timeexceed;

	/* ipv6IfIcmpOutParmProblems, # of output parameter problem errors */

	u_quad_t ifs6_out_paramprob;

	/* ipv6IfIcmpOutPktTooBigs, # of output packet too big errors */

	u_quad_t ifs6_out_pkttoobig;

	/* ipv6IfIcmpOutEchos, # of output echo requests */

	u_quad_t ifs6_out_echo;

	/* ipv6IfIcmpOutEchoReplies, # of output echo replies */

	u_quad_t ifs6_out_echoreply;

	/* ipv6IfIcmpOutRouterSolicits, # of output router solicitations */

	u_quad_t ifs6_out_routersolicit;

	/* ipv6IfIcmpOutRouterAdvertisements, # of output router advertisements */

	u_quad_t ifs6_out_routeradvert;

	/* ipv6IfIcmpOutNeighborSolicits, # of output neighbor solicitations */

	u_quad_t ifs6_out_neighborsolicit;

	/* ipv6IfIcmpOutNeighborAdvertisements, # of output neighbor advertisements */

	u_quad_t ifs6_out_neighboradvert;

	/* ipv6IfIcmpOutRedirects, # of output redirects */

	u_quad_t ifs6_out_redirect;

	/* ipv6IfIcmpOutGroupMembQueries, # of output MLD queries */

	u_quad_t ifs6_out_mldquery;

	/* ipv6IfIcmpOutGroupMembResponses, # of output MLD reports */

	u_quad_t ifs6_out_mldreport;

	/* ipv6IfIcmpOutGroupMembReductions, # of output MLD done */

	u_quad_t ifs6_out_mlddone;

};

struct	in6_ifreq {

	char	ifr_name[IFNAMSIZ];

	union {

		struct	sockaddr_in6 ifru_addr;

		struct	sockaddr_in6 ifru_dstaddr;

		int	ifru_flags;

		int	ifru_flags6;

		int	ifru_metric;

		caddr_t	ifru_data;

		struct in6_addrlifetime ifru_lifetime;

		struct in6_ifstat ifru_stat;

		struct icmp6_ifstat ifru_icmp6stat;

		u_int32_t ifru_scope_id[16];

	} ifr_ifru;

};

struct	in6_aliasreq {

	char	ifra_name[IFNAMSIZ];

	struct	sockaddr_in6 ifra_addr;

	struct	sockaddr_in6 ifra_dstaddr;

	struct	sockaddr_in6 ifra_prefixmask;

	int	ifra_flags;

	struct in6_addrlifetime ifra_lifetime;

};

/* prefix type macro */

#define IN6_PREFIX_ND	1

#define IN6_PREFIX_RR	2

/*

 * prefix related flags passed between kernel(NDP related part) and

 * user land command(ifconfig) and daemon(rtadvd).

 */

struct in6_prflags {

	struct prf_ra {

		u_char onlink : 1;

		u_char autonomous : 1;

		u_char reserved : 6;

	} prf_ra;

	u_char prf_reserved1;

	u_short prf_reserved2;

	/* want to put this on 4byte offset */

	struct prf_rr {

		u_char decrvalid : 1;

		u_char decrprefd : 1;

		u_char reserved : 6;

	} prf_rr;

	u_char prf_reserved3;

	u_short prf_reserved4;

};

struct  in6_prefixreq {

	char	ipr_name[IFNAMSIZ];

	u_char	ipr_origin;

	u_char	ipr_plen;

	u_int32_t ipr_vltime;

	u_int32_t ipr_pltime;

	struct in6_prflags ipr_flags;

	struct	sockaddr_in6 ipr_prefix;

};

#define PR_ORIG_RA	0

#define PR_ORIG_RR	1

#define PR_ORIG_STATIC	2

#define PR_ORIG_KERNEL	3

#define ipr_raf_onlink		ipr_flags.prf_ra.onlink

#define ipr_raf_auto		ipr_flags.prf_ra.autonomous

#define ipr_statef_onlink	ipr_flags.prf_state.onlink

#define ipr_rrf_decrvalid	ipr_flags.prf_rr.decrvalid

#define ipr_rrf_decrprefd	ipr_flags.prf_rr.decrprefd

struct	in6_rrenumreq {

	char	irr_name[IFNAMSIZ];

	u_char	irr_origin;

	u_char	irr_m_len;	/* match len for matchprefix */

	u_char	irr_m_minlen;	/* minlen for matching prefix */

	u_char	irr_m_maxlen;	/* maxlen for matching prefix */

	u_char	irr_u_uselen;	/* uselen for adding prefix */

	u_char	irr_u_keeplen;	/* keeplen from matching prefix */

	struct irr_raflagmask {

		u_char onlink : 1;

		u_char autonomous : 1;

		u_char reserved : 6;

	} irr_raflagmask;

	u_int32_t irr_vltime;

	u_int32_t irr_pltime;

	struct in6_prflags irr_flags;

	struct	sockaddr_in6 irr_matchprefix;

	struct	sockaddr_in6 irr_useprefix;

};

#define irr_raf_mask_onlink	irr_raflagmask.onlink

#define irr_raf_mask_auto	irr_raflagmask.autonomous

#define irr_raf_mask_reserved	irr_raflagmask.reserved

#define irr_raf_onlink		irr_flags.prf_ra.onlink

#define irr_raf_auto		irr_flags.prf_ra.autonomous

#define irr_statef_onlink	irr_flags.prf_state.onlink

#define irr_rrf			irr_flags.prf_rr

#define irr_rrf_decrvalid	irr_flags.prf_rr.decrvalid

#define irr_rrf_decrprefd	irr_flags.prf_rr.decrprefd

/*

 * Given a pointer to an in6_ifaddr (ifaddr),

 * return a pointer to the addr as a sockaddr_in6

 */

#define IA6_IN6(ia)	(&((ia)->ia_addr.sin6_addr))

#define IA6_DSTIN6(ia)	(&((ia)->ia_dstaddr.sin6_addr))

#define IA6_MASKIN6(ia)	(&((ia)->ia_prefixmask.sin6_addr))

#define IA6_SIN6(ia)	(&((ia)->ia_addr))

#define IA6_DSTSIN6(ia)	(&((ia)->ia_dstaddr))

#define IFA_IN6(x)	(&((struct sockaddr_in6 *)((x)->ifa_addr))->sin6_addr)

#define IFA_DSTIN6(x)	(&((struct sockaddr_in6 *)((x)->ifa_dstaddr))->sin6_addr)

#define IFPR_IN6(x)	(&((struct sockaddr_in6 *)((x)->ifpr_prefix))->sin6_addr)

#ifdef _KERNEL

#define IN6_ARE_MASKED_ADDR_EQUAL(d, a, m)	(	\

	(((d)->s6_addr32[0] ^ (a)->s6_addr32[0]) & (m)->s6_addr32[0]) == 0 && \

	(((d)->s6_addr32[1] ^ (a)->s6_addr32[1]) & (m)->s6_addr32[1]) == 0 && \

	(((d)->s6_addr32[2] ^ (a)->s6_addr32[2]) & (m)->s6_addr32[2]) == 0 && \

	(((d)->s6_addr32[3] ^ (a)->s6_addr32[3]) & (m)->s6_addr32[3]) == 0 )

#endif

#define SIOCSIFADDR_IN6		 _IOW('i', 12, struct in6_ifreq)

#define SIOCGIFADDR_IN6		_IOWR('i', 33, struct in6_ifreq)

#ifdef _KERNEL

/*

 * SIOCSxxx ioctls should be unused (see comments in in6.c), but

 * we do not shift numbers for binary compatibility.

 */

#define SIOCSIFDSTADDR_IN6	 _IOW('i', 14, struct in6_ifreq)

#define SIOCSIFNETMASK_IN6	 _IOW('i', 22, struct in6_ifreq)

#endif

#define SIOCGIFDSTADDR_IN6	_IOWR('i', 34, struct in6_ifreq)

#define SIOCGIFNETMASK_IN6	_IOWR('i', 37, struct in6_ifreq)

#define SIOCDIFADDR_IN6		 _IOW('i', 25, struct in6_ifreq)

#define SIOCAIFADDR_IN6		 _IOW('i', 26, struct in6_aliasreq)

#define SIOCSIFPHYADDR_IN6       _IOW('i', 70, struct in6_aliasreq)

#define	SIOCGIFPSRCADDR_IN6	_IOWR('i', 71, struct in6_ifreq)

#define	SIOCGIFPDSTADDR_IN6	_IOWR('i', 72, struct in6_ifreq)

#define SIOCGIFAFLAG_IN6	_IOWR('i', 73, struct in6_ifreq)

#define SIOCGDRLST_IN6		_IOWR('i', 74, struct in6_drlist)

#ifdef _KERNEL

/* XXX: SIOCGPRLST_IN6 is exposed in KAME but in6_oprlist is not. */

#define SIOCGPRLST_IN6		_IOWR('i', 75, struct in6_oprlist)

#endif

#ifdef _KERNEL

#define OSIOCGIFINFO_IN6	_IOWR('i', 76, struct in6_ondireq)

#endif

#define SIOCGIFINFO_IN6		_IOWR('i', 108, struct in6_ndireq)

#define SIOCSNDFLUSH_IN6	_IOWR('i', 77, struct in6_ifreq)

#define SIOCGNBRINFO_IN6	_IOWR('i', 78, struct in6_nbrinfo)

#define SIOCSPFXFLUSH_IN6	_IOWR('i', 79, struct in6_ifreq)

#define SIOCSRTRFLUSH_IN6	_IOWR('i', 80, struct in6_ifreq)

#define SIOCGIFALIFETIME_IN6	_IOWR('i', 81, struct in6_ifreq)

#define SIOCSIFALIFETIME_IN6	_IOWR('i', 82, struct in6_ifreq)

#define SIOCGIFSTAT_IN6		_IOWR('i', 83, struct in6_ifreq)

#define SIOCGIFSTAT_ICMP6	_IOWR('i', 84, struct in6_ifreq)

#define SIOCSDEFIFACE_IN6	_IOWR('i', 85, struct in6_ndifreq)

#define SIOCGDEFIFACE_IN6	_IOWR('i', 86, struct in6_ndifreq)

#define SIOCSIFINFO_FLAGS	_IOWR('i', 87, struct in6_ndireq) /* XXX */

#define SIOCSSCOPE6		_IOW('i', 88, struct in6_ifreq)

#define SIOCGSCOPE6		_IOWR('i', 89, struct in6_ifreq)

#define SIOCGSCOPE6DEF		_IOWR('i', 90, struct in6_ifreq)

#define SIOCSIFPREFIX_IN6	_IOW('i', 100, struct in6_prefixreq) /* set */

#define SIOCGIFPREFIX_IN6	_IOWR('i', 101, struct in6_prefixreq) /* get */

#define SIOCDIFPREFIX_IN6	_IOW('i', 102, struct in6_prefixreq) /* del */

#define SIOCAIFPREFIX_IN6	_IOW('i', 103, struct in6_rrenumreq) /* add */

#define SIOCCIFPREFIX_IN6	_IOW('i', 104, \

				     struct in6_rrenumreq) /* change */

#define SIOCSGIFPREFIX_IN6	_IOW('i', 105, \

				     struct in6_rrenumreq) /* set global */

#define SIOCGETSGCNT_IN6	_IOWR('u', 106, \

				      struct sioc_sg_req6) /* get s,g pkt cnt */

#define SIOCGETMIFCNT_IN6	_IOWR('u', 107, \

				      struct sioc_mif_req6) /* get pkt cnt per if */

#define SIOCAADDRCTL_POLICY	_IOW('u', 108, struct in6_addrpolicy)

#define SIOCDADDRCTL_POLICY	_IOW('u', 109, struct in6_addrpolicy)

#define IN6_IFF_ANYCAST		0x01	/* anycast address */

#define IN6_IFF_TENTATIVE	0x02	/* tentative address */

#define IN6_IFF_DUPLICATED	0x04	/* DAD detected duplicate */

#define IN6_IFF_DETACHED	0x08	/* may be detached from the link */

#define IN6_IFF_DEPRECATED	0x10	/* deprecated address */

#define IN6_IFF_NODAD		0x20	/* don't perform DAD on this address

					 * (used only at first SIOC* call)

					 */

#define IN6_IFF_AUTOCONF	0x40	/* autoconfigurable address. */

#define IN6_IFF_TEMPORARY	0x80	/* temporary (anonymous) address. */

#define IN6_IFF_NOPFX		0x8000	/* skip kernel prefix management.

					 * XXX: this should be temporary.

					 */

/* do not input/output */

#define IN6_IFF_NOTREADY (IN6_IFF_TENTATIVE|IN6_IFF_DUPLICATED)

#ifdef _KERNEL

#define IN6_ARE_SCOPE_CMP(a,b) ((a)-(b))

#define IN6_ARE_SCOPE_EQUAL(a,b) ((a)==(b))

#endif

#ifdef _KERNEL

extern struct in6_ifaddr *in6_ifaddr;

extern struct icmp6stat icmp6stat;

#define in6_ifstat_inc(ifp, tag) \

do {								\

	if (ifp)						\

		((struct in6_ifextra *)((ifp)->if_afdata[AF_INET6]))->in6_ifstat->tag++; \

} while (/*CONSTCOND*/ 0)

extern struct in6_addr zeroin6_addr;

extern u_char inet6ctlerrmap[];

extern unsigned long in6_maxmtu;

#ifdef MALLOC_DECLARE

MALLOC_DECLARE(M_IPMADDR);

#endif /* MALLOC_DECLARE */

/*

 * Macro for finding the internet address structure (in6_ifaddr) corresponding

 * to a given interface (ifnet structure).

 */

#define IFP_TO_IA6(ifp, ia)				\

/* struct ifnet *ifp; */				\

/* struct in6_ifaddr *ia; */				\

do {									\

	struct ifaddr *ifa;						\