sys/rpc/rpc_msg.h

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

/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * 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.
 */

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

#ifndef _RPC_RPC_MSG_H
#define _RPC_RPC_MSG_H

#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 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 {
        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

__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 *);


/*
 * 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 enum clnt_stat _seterr_reply(struct rpc_msg *, struct rpc_err *);
__END_DECLS

#endif /* !_RPC_RPC_MSG_H */
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