/*      $NetBSD: pmap_rmt.c,v 1.29 2000/07/06 03:10:34 christos 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.
 */

/*
 * pmap_rmt.c
 * Client interface to pmap rpc service.
 * remote call and broadcast service
 *
 * Copyright (C) 1984, Sun Microsystems, Inc.
 */

#include "namespace.h"
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/poll.h>
#include <sys/socket.h>

#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#include <assert.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include <rpc/rpc.h>
#include <rpc/pmap_prot.h>
#include <rpc/pmap_clnt.h>
#include <rpc/pmap_rmt.h>
#include "un-namespace.h"

static const struct timeval timeout = { 3, 0 };

/*
 * pmapper remote-call-service interface.
 * This routine is used to call the pmapper remote call service
 * which will look up a service program in the port maps, and then
 * remotely call that routine with the given parameters.  This allows
 * programs to do a lookup and call in one step.
*/
enum clnt_stat
pmap_rmtcall(struct sockaddr_in *addr, u_long prog, u_long vers, u_long proc,
    xdrproc_t xdrargs, caddr_t argsp, xdrproc_t xdrres, caddr_t resp, 
    struct timeval tout, u_long *port_ptr)
{
        int sock = -1;
        CLIENT *client;
        struct rmtcallargs a;
        struct rmtcallres r;
        enum clnt_stat stat;

        assert(addr != NULL);
        assert(port_ptr != NULL);

        addr->sin_port = htons(PMAPPORT);
        client = clntudp_create(addr, PMAPPROG, PMAPVERS, timeout, &sock);
        if (client != NULL) {
                a.prog = prog;
                a.vers = vers;
                a.proc = proc;
                a.args_ptr = argsp;
                a.xdr_args = xdrargs;
                r.port_ptr = port_ptr;
                r.results_ptr = resp;
                r.xdr_results = xdrres;
                stat = CLNT_CALL(client, (rpcproc_t)PMAPPROC_CALLIT,
                    (xdrproc_t)xdr_rmtcall_args, &a, (xdrproc_t)xdr_rmtcallres,
                    &r, tout);
                CLNT_DESTROY(client);
        } else {
                stat = RPC_FAILED;
        }
        addr->sin_port = 0;
        return (stat);
}


/*
 * XDR remote call arguments
 * written for XDR_ENCODE direction only
 */
bool_t
xdr_rmtcall_args(XDR *xdrs, struct rmtcallargs *cap)
{
        u_int lenposition, argposition, position;

        assert(xdrs != NULL);
        assert(cap != NULL);

        if (xdr_u_long(xdrs, &(cap->prog)) &&
            xdr_u_long(xdrs, &(cap->vers)) &&
            xdr_u_long(xdrs, &(cap->proc))) {
                lenposition = XDR_GETPOS(xdrs);
                if (! xdr_u_long(xdrs, &(cap->arglen)))
                    return (FALSE);
                argposition = XDR_GETPOS(xdrs);
                if (! (*(cap->xdr_args))(xdrs, cap->args_ptr))
                    return (FALSE);
                position = XDR_GETPOS(xdrs);
                cap->arglen = (u_long)position - (u_long)argposition;
                XDR_SETPOS(xdrs, lenposition);
                if (! xdr_u_long(xdrs, &(cap->arglen)))
                    return (FALSE);
                XDR_SETPOS(xdrs, position);
                return (TRUE);
        }
        return (FALSE);
}

/*
 * XDR remote call results
 * written for XDR_DECODE direction only
 */
bool_t
xdr_rmtcallres(XDR *xdrs, struct rmtcallres *crp)
{
        caddr_t port_ptr;

        assert(xdrs != NULL);
        assert(crp != NULL);

        port_ptr = (caddr_t)(void *)crp->port_ptr;
        if (xdr_reference(xdrs, &port_ptr, sizeof (u_long),
            (xdrproc_t)xdr_u_long) && xdr_u_long(xdrs, &crp->resultslen)) {
                crp->port_ptr = (u_long *)(void *)port_ptr;
                return ((*(crp->xdr_results))(xdrs, crp->results_ptr));
        }
        return (FALSE);
}