/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
 * Reserved.  This file contains Original Code and/or Modifications of
 * Original Code as defined in and that are subject to the Apple Public
 * Source License Version 1.1 (the "License").  You may not use this file
 * except in compliance with the License.  Please obtain a copy of the
 * License at http://www.apple.com/publicsource and read it before using
 * this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
 * unrestricted use provided that this legend is included on all tape
 * media and as a part of the software program in whole or part.  Users
 * may copy or modify Sun RPC without charge, but are not authorized
 * to license or distribute it to anyone else except as part of a product or
 * program developed by the user.
 * 
 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
 * 
 * Sun RPC is provided with no support and without any obligation on the
 * part of Sun Microsystems, Inc. to assist in its use, correction,
 * modification or enhancement.
 * 
 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
 * OR ANY PART THEREOF.
 * 
 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
 * or profits or other special, indirect and consequential damages, even if
 * Sun has been advised of the possibility of such damages.
 * 
 * Sun Microsystems, Inc.
 * 2550 Garcia Avenue
 * Mountain View, California  94043
 *
 *	from: @(#)rpc_msg.h 1.7 86/07/16 SMI
 *	from: @(#)rpc_msg.h	2.1 88/07/29 4.0 RPCSRC
 *	$Id: rpc_msg.h,v 1.3 2004/10/28 21:58:24 emoy Exp $
 */

/*
 * rpc_msg.h
 * rpc message definition
 *
 * Copyright (C) 1984, Sun Microsystems, Inc.
 */

#ifndef _RPC_RPCMSG_H
#define _RPC_RPCMSG_H

#include <rpc/auth.h>

#ifdef __LP64__
#define RPC_MSG_VERSION		((unsigned int) 2)
#else
#define RPC_MSG_VERSION		((unsigned long) 2)
#endif
#define RPC_SERVICE_PORT	((unsigned short) 2048)

/*
 * Bottom up definition of an rpc message.
 * NOTE: call and reply use the same overall stuct but
 * different parts of unions within it.
 */

enum msg_type {
	CALL=0,
	REPLY=1
};

enum reply_stat {
	MSG_ACCEPTED=0,
	MSG_DENIED=1
};

enum accept_stat {
	SUCCESS=0,
	PROG_UNAVAIL=1,
	PROG_MISMATCH=2,
	PROC_UNAVAIL=3,
	GARBAGE_ARGS=4,
	SYSTEM_ERR=5
};

enum reject_stat {
	RPC_MISMATCH=0,
	AUTH_ERROR=1
};

/*
 * Reply part of an rpc exchange
 */

/*
 * Reply to an rpc request that was accepted by the server.
 * Note: there could be an error even though the request was
 * accepted.
 */
struct accepted_reply {
	struct opaque_auth	ar_verf;
	enum accept_stat	ar_stat;
	union {
		struct {
#ifdef __LP64__
			unsigned int low;
			unsigned int high;
#else
			unsigned long low;
			unsigned long high;
#endif
		} AR_versions;
		struct {
			caddr_t	where;
			xdrproc_t proc;
		} AR_results;
		/* and many other null cases */
	} ru;
#define	ar_results	ru.AR_results
#define	ar_vers		ru.AR_versions
};

/*
 * Reply to an rpc request that was rejected by the server.
 */
struct rejected_reply {
	enum reject_stat rj_stat;
	union {
		struct {
#ifdef __LP64__
			unsigned int low;
			unsigned int high;
#else
			unsigned long low;
			unsigned long high;
#endif
		} RJ_versions;
		enum auth_stat RJ_why;  /* why authentication did not work */
	} ru;
#define	rj_vers	ru.RJ_versions
#define	rj_why	ru.RJ_why
};

/*
 * Body of a reply to an rpc request.
 */
struct reply_body {
	enum reply_stat rp_stat;
	union {
		struct accepted_reply RP_ar;
		struct rejected_reply RP_dr;
	} ru;
#define	rp_acpt	ru.RP_ar
#define	rp_rjct	ru.RP_dr
};

/*
 * Body of an rpc request call.
 */
struct call_body {
#ifdef __LP64__
	unsigned int cb_rpcvers;	/* must be equal to two */
	unsigned int cb_prog;
	unsigned int cb_vers;
	unsigned int cb_proc;
#else
	unsigned long cb_rpcvers;	/* must be equal to two */
	unsigned long cb_prog;
	unsigned long cb_vers;
	unsigned long cb_proc;
#endif
	struct opaque_auth cb_cred;
	struct opaque_auth cb_verf; /* protocol specific - provided by client */
};

/*
 * The rpc message
 */
struct rpc_msg {
#ifdef __LP64__
	unsigned int			rm_xid;
#else
	unsigned long			rm_xid;
#endif
	enum msg_type		rm_direction;
	union {
		struct call_body RM_cmb;
		struct reply_body RM_rmb;
	} ru;
#define	rm_call		ru.RM_cmb
#define	rm_reply	ru.RM_rmb
};
#define	acpted_rply	ru.RM_rmb.ru.RP_ar
#define	rjcted_rply	ru.RM_rmb.ru.RP_dr

__BEGIN_DECLS
/*
 * XDR routine to handle a rpc message.
 * xdr_callmsg(xdrs, cmsg)
 * 	XDR *xdrs;
 * 	struct rpc_msg *cmsg;
 */
extern bool_t	xdr_callmsg	__P((XDR *, struct rpc_msg *));

/*
 * XDR routine to pre-serialize the static part of a rpc message.
 * xdr_callhdr(xdrs, cmsg)
 * 	XDR *xdrs;
 * 	struct rpc_msg *cmsg;
 */
extern bool_t	xdr_callhdr	__P((XDR *, struct rpc_msg *));

/*
 * XDR routine to handle a rpc reply.
 * xdr_replymsg(xdrs, rmsg)
 * 	XDR *xdrs;
 * 	struct rpc_msg *rmsg;
 */
extern bool_t	xdr_replymsg	__P((XDR *, struct rpc_msg *));

/*
 * Fills in the error part of a reply message.
 * _seterr_reply(msg, error)
 * 	struct rpc_msg *msg;
 * 	struct rpc_err *error;
 */
extern void	_seterr_reply	__P((struct rpc_msg *, struct rpc_err *));
__END_DECLS

#endif /* !_RPC_RPCMSG_H */
