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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, MERCHANTIBILITY 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

 */

#if defined(LIBC_SCCS) && !defined(lint)

/*static char *sccsid = "from: @(#)clnt_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro";*/

/*static char *sccsid = "from: @(#)clnt_simple.c        2.2 88/08/01 4.0 RPCSRC";*/

static char *rcsid = "$FreeBSD: src/lib/libc/rpc/clnt_simple.c,v 1.12 2000/01/27 23:06:35 jasone Exp $";

#endif

/*

 * clnt_simple.c

 * Simplified front end to rpc.

 *

 * Copyright (C) 1984, Sun Microsystems, Inc.

 */

#include <sys/param.h>

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <string.h>

#include <rpc/rpc.h>

#include <sys/socket.h>

#include <netdb.h>

struct call_rpc_private {

        CLIENT  *client;

        int     socket;

        int     oldprognum, oldversnum, valid;

        char    *oldhost;

};

#define callrpc_private ((struct call_rpc_private *)((struct rtems_rpc_task_variables *)rtems_rpc_task_variables)->call_rpc_private)

int

callrpc(host, prognum, versnum, procnum, inproc, in, outproc, out)

        char *host;

        int prognum, versnum, procnum;

        xdrproc_t inproc, outproc;

        char *in, *out;

{

        register struct call_rpc_private *crp = callrpc_private;

        struct sockaddr_in server_addr;

        enum clnt_stat clnt_stat;

        struct hostent *hp;

        struct timeval timeout, tottimeout;

        if (crp == 0) {

                crp = (struct call_rpc_private *)calloc(1, sizeof (*crp));

                if (crp == 0)

                        return (0);

                callrpc_private = crp;

        }

        if (crp->oldhost == NULL) {

                crp->oldhost = malloc(MAXHOSTNAMELEN);

                crp->oldhost[0] = 0;

                crp->socket = RPC_ANYSOCK;

        }

        if (crp->valid && crp->oldprognum == prognum && crp->oldversnum == versnum

                && strcmp(crp->oldhost, host) == 0) {

                /* reuse old client */

        } else {

                crp->valid = 0;

                if (crp->socket != -1)

                        (void)_close(crp->socket);

                crp->socket = RPC_ANYSOCK;

                if (crp->client) {

                        clnt_destroy(crp->client);

                        crp->client = NULL;

                }

                if ((hp = gethostbyname(host)) == NULL)

                        return ((int) RPC_UNKNOWNHOST);

                timeout.tv_usec = 0;

                timeout.tv_sec = 5;

                memset(&server_addr, 0, sizeof(server_addr));

                memcpy((char *)&server_addr.sin_addr, hp->h_addr, hp->h_length);

                server_addr.sin_len = sizeof(struct sockaddr_in);

                server_addr.sin_family = AF_INET;

                server_addr.sin_port =  0;

                if ((crp->client = clntudp_create(&server_addr, (u_long)prognum,

                    (u_long)versnum, timeout, &crp->socket)) == NULL)

                        return ((int) rpc_createerr.cf_stat);

                crp->valid = 1;

                crp->oldprognum = prognum;

                crp->oldversnum = versnum;

                (void) strcpy(crp->oldhost, host);

        }

        tottimeout.tv_sec = 25;

        tottimeout.tv_usec = 0;

        clnt_stat = clnt_call(crp->client, procnum, inproc, in,

            outproc, out, tottimeout);

        /*

         * if call failed, empty cache

         */

        if (clnt_stat != RPC_SUCCESS)

                crp->valid = 0;

        return ((int) clnt_stat);

}