/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
/*	  All Rights Reserved	*/

/*
 * Portions of this source code were derived from Berkeley 4.3 BSD
 * under license from the Regents of the University of California.
 */

#ifndef	_SYS_SOCKET_IMPL_H
#define	_SYS_SOCKET_IMPL_H

#pragma ident	"%Z%%M%	%I%	%E% SMI"

#ifdef	__cplusplus
extern "C" {
#endif

#ifndef	_SA_FAMILY_T
#define	_SA_FAMILY_T
typedef uint16_t	sa_family_t;
#endif

/*
 * Structure used by kernel to store most
 * addresses.
 */
struct sockaddr {
	sa_family_t	sa_family;	/* address family */
	char		sa_data[14];	/* up to 14 bytes of direct address */
};

#if !defined(_XPG4_2) || defined(__EXTENSIONS__)
#include <sys/un.h>
#include <net/if_dl.h>
#endif	/* !defined(_XPG4_2) || defined(__EXTENSIONS__) */

#if !defined(_XPG4_2) || defined(_XPG6) || defined(__EXTENSIONS__)
/*
 * sockaddr_storage:
 * Common superset of at least AF_INET, AF_INET6 and AF_LINK sockaddr
 * structures. Has sufficient size and alignment for those sockaddrs.
 */

/*
 * Desired maximum size, alignment size and related types.
 */
#define	_SS_MAXSIZE	256	/* Implementation specific max size */

/*
 * To represent desired sockaddr max alignment for platform, a
 * type is chosen which may depend on implementation platform architecture.
 * Type chosen based on alignment size restrictions from <sys/isa_defs.h>.
 * We desire to force up to (but no more than) 64-bit (8 byte) alignment,
 * on platforms where it is possible to do so. (e.g not possible on ia32).
 * For all currently supported platforms by our implementation
 * in <sys/isa_defs.h>, (i.e. sparc, sparcv9, ia32, ia64)
 * type "double" is suitable for that intent.
 *
 * Note: Type "double" is chosen over the more obvious integer type int64_t.
 *   int64_t is not a valid type for strict ANSI/ISO C compilation on ILP32.
 */
typedef	double		sockaddr_maxalign_t;

#define	_SS_ALIGNSIZE	(sizeof (sockaddr_maxalign_t))

/*
 * Definitions used for sockaddr_storage structure paddings design.
 */
#define	_SS_PAD1SIZE	(_SS_ALIGNSIZE - sizeof (sa_family_t))
#define	_SS_PAD2SIZE	(_SS_MAXSIZE - (sizeof (sa_family_t)+ \
			_SS_PAD1SIZE + _SS_ALIGNSIZE))

struct sockaddr_storage {
	sa_family_t	ss_family;	/* Address family */
	/* Following fields are implementation specific */
	char		_ss_pad1[_SS_PAD1SIZE];
	sockaddr_maxalign_t _ss_align;
	char		_ss_pad2[_SS_PAD2SIZE];
};
#endif	/* !defined(_XPG4_2) || defined(_XPG6) || defined(__EXTENSIONS__) */

#ifdef	__cplusplus
}
#endif

#endif	/* _SYS_SOCKET_IMPL_H */