rpc_msg.h

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/*
 * 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, MERCHANTABILITY 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
 * $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 _RPC_RPC_MSG_H
#define _RPC_RPC_MSG_H

#include <rpc/types.h>
#include <rpc/xdr.h> /* xdrproc_t */
#include <rpc/auth.h> /* opaque_auth */

struct rpc_err; /* forward */

#define RPC_MSG_VERSION         ((u_int32_t) 2)
#define RPC_SERVICE_PORT        ((u_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,
        _MSG_TYPE = 0xffffffff
};

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

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

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

/*
 * 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

__BEGIN_DECLS
/*
 * 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;
 */
extern void     _seterr_reply(struct rpc_msg *, struct rpc_err *);
__END_DECLS

#endif /* !_RPC_RPC_MSG_H */