/*

 * 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_getport.c

 * Client interface to pmap rpc service.

 *

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

 */

#include <sys/types.h>

#include <sys/socket.h>

#include <arpa/inet.h>

#include <net/if.h>

#include <assert.h>

#include <unistd.h>

#include <rpc/rpc.h>

#include <rpc/pmap_prot.h>

#include <rpc/pmap_clnt.h>

static const struct timeval timeout = { 5, 0 };

static const 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 sock = -1;

	CLIENT *client;

	struct pmap parms;

	assert(address != NULL);

	address->sin_port = htons(PMAPPORT);

	client = clntudp_bufcreate(address, PMAPPROG,

	    PMAPVERS, timeout, &sock, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);

	if (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, (rpcproc_t)PMAPPROC_GETPORT,

		    (xdrproc_t)xdr_pmap,

		    &parms, (xdrproc_t)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);

	}

	address->sin_port = 0;

	return (port);

}