source: rtems/cpukit/librpc/src/rpc/clnt_simple.c @ 57cfaad

/*
 * 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)_RPC_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);
}