lib/librpc/rpc/pmap_getport.c

/*
 * 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: @(#)pmap_getport.c 1.9 87/08/11 Copyr 1984 Sun Micro";*/
/*static char *sccsid = "from: @(#)pmap_getport.c       2.2 88/08/01 4.0 RPCSRC";*/
static char *rcsid = "$Id: pmap_getport.c,v 1.3 1993/08/26 00:53:28 jtc Exp $";
#endif

/*
 * pmap_getport.c
 * Client interface to pmap rpc service.
 *
 * Copyright (C) 1984, Sun Microsystems, Inc.
 */

#include <rpc/rpc.h>
#include <rpc/pmap_prot.h>
#include <rpc/pmap_clnt.h>
#include <sys/socket.h>
#include <net/if.h>

static struct timeval timeout = { 5, 0 };
static struct timeval tottimeout = { 60, 0 };

/*
 * Find the mapped port for program,version.
 * Calls the pmap service remotely to do the lookup.
 * Returns 0 if no map exists.
 */
u_short
pmap_getport(address, program, version, protocol)
        struct sockaddr_in *address;
        u_long program;
        u_long version;
        u_int protocol;
{
        u_short port = 0;
        int socket = -1;
        register CLIENT *client;
        struct pmap parms;

        address->sin_port = htons(PMAPPORT);
        client = clntudp_bufcreate(address, PMAPPROG,
            PMAPVERS, timeout, &socket, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
        if (client != (CLIENT *)NULL) {
                parms.pm_prog = program;
                parms.pm_vers = version;
                parms.pm_prot = protocol;
                parms.pm_port = 0;  /* not needed or used */
                if (CLNT_CALL(client, PMAPPROC_GETPORT, xdr_pmap, &parms,
                    xdr_u_short, &port, tottimeout) != RPC_SUCCESS){
                        rpc_createerr.cf_stat = RPC_PMAPFAILURE;
                        clnt_geterr(client, &rpc_createerr.cf_error);
                } else if (port == 0) {
                        rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
                }
                CLNT_DESTROY(client);
        }
        (void)close(socket);
        address->sin_port = 0;
        return (port);
}