rpc_msg.h

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/*  $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.
 */

/* NFSv4.1 client for Windows
 * Copyright © 2012 The Regents of the University of Michigan
 *
 * Olga Kornievskaia <aglo@umich.edu>
 * Casey Bodley <cbodley@umich.edu>
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or (at
 * your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * without any warranty; without even the implied warranty of merchantability
 * or fitness for a particular purpose.  See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 */

#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

__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 read just xid and direction, then union
 * xdr_getxiddir(xdrs, rmsg)
 *  XDR *xdrs;
 *  struct rpc_msg *rmsg;
 */
extern bool_t   xdr_getxiddir(XDR *, struct rpc_msg *);
extern bool_t   xdr_getreplyunion(XDR *, struct rpc_msg *);
extern bool_t   xdr_getcallbody(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 *);
__END_DECLS

#endif /* !_TIRPC_RPC_MSG_H */