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name : rpc_msg.h
 /*	$NetBSD: rpc_msg.h,v 1.11 2000/06/02 22:57:56 fvdl Exp $	*/

/*
 * Copyright (c) 2009, Sun Microsystems, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * - 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.
 * - Neither the name of Sun Microsystems, Inc. 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
 *
 *	from: @(#)rpc_msg.h 1.7 86/07/16 SMI
 *	from: @(#)rpc_msg.h	2.1 88/07/29 4.0 RPCSRC
 * $FreeBSD: src/include/rpc/rpc_msg.h,v 1.15 2003/01/01 18:48:42 schweikh Exp $
 */

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

#ifndef _TIRPC_RPC_MSG_H
#define _TIRPC_RPC_MSG_H

#define RPC_MSG_VERSION		((u_int32_t) 2)
#define RPC_SERVICE_PORT	((u_short) 2048)

#include <rpc/auth.h>

/*
 * 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 {
			rpcvers_t low;
			rpcvers_t high;
		} 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 {
			rpcvers_t low;
			rpcvers_t high;
		} 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 {
	rpcvers_t cb_rpcvers;	/* must be equal to two */
	rpcprog_t cb_prog;
	rpcvers_t cb_vers;
	rpcproc_t cb_proc;
	struct opaque_auth cb_cred;
	struct opaque_auth cb_verf; /* protocol specific - provided by client */
};

/*
 * The rpc message
 */
struct rpc_msg {
	u_int32_t		rm_xid;
	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

#ifdef __cplusplus
extern "C" {
#endif
/*
 * XDR routine to handle a rpc message.
 * xdr_callmsg(xdrs, cmsg)
 * 	XDR *xdrs;
 * 	struct rpc_msg *cmsg;
 */
extern bool_t	xdr_callmsg(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(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(XDR *, struct rpc_msg *);


/*
 * XDR routine to handle an accepted rpc reply.
 * xdr_accepted_reply(xdrs, rej)
 * 	XDR *xdrs;
 * 	struct accepted_reply *rej;
 */
extern bool_t	xdr_accepted_reply(XDR *, struct accepted_reply *);

/*
 * XDR routine to handle a rejected rpc reply.
 * xdr_rejected_reply(xdrs, rej)
 * 	XDR *xdrs;
 * 	struct rejected_reply *rej;
 */
extern bool_t	xdr_rejected_reply(XDR *, struct rejected_reply *);

/*
 * 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(struct rpc_msg *, struct rpc_err *);
#ifdef __cplusplus
}
#endif

#endif /* !_TIRPC_RPC_MSG_H */
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