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/* @(#)rpc_msg.h	2.1 88/07/29 4.0 RPCSRC */
/*
 * Copyright (c) 2010, Oracle America, 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 the "Oracle America, 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.
 */
/*      @(#)rpc_msg.h 1.7 86/07/16 SMI      */

/*
 * rpc_msg.h
 * rpc message definition
 */

#ifndef GSSRPC_RPC_MSG_H
#define GSSRPC_RPC_MSG_H

GSSRPC__BEGIN_DECLS

#define RPC_MSG_VERSION		((uint32_t) 2)
#define RPC_SERVICE_PORT	((u_short) 2048)

/*
 * Bottom up definition of an rpc message.
 * NOTE: call and reply use the same overall struct 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 {
	uint32_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

/*
 * 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 *);

/*
 * Fills in the error part of a reply message.
 * _seterr_reply(msg, error)
 * 	struct rpc_msg *msg;
 * 	struct rpc_err *error;
 */
/*
 * RENAMED: should be _seterr_reply or __seterr_reply if we can use
 * reserved namespace.
 */
extern void	gssrpc__seterr_reply(struct rpc_msg *, struct rpc_err *);

/* XDR the MSG_ACCEPTED part of a reply message union */
extern bool_t	xdr_accepted_reply(XDR *, struct accepted_reply *);

/* XDR the MSG_DENIED part of a reply message union */
extern bool_t	xdr_rejected_reply(XDR *, struct rejected_reply *);
GSSRPC__END_DECLS

#endif /* !defined(GSSRPC_RPC_MSG_H) */