/*	$OpenBSD: pmap_clnt.c,v 1.16 2010/09/01 14:43:34 millert Exp $ */

/*
 * Copyright (c) 2010, Oracle America, Inc.
 *
 * 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 the "Oracle America, 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_clnt.c
 * Client interface to pmap rpc service.
 */

#include <unistd.h>
#include <errno.h>
#include <rpc/rpc.h>
#include <rpc/pmap_prot.h>
#include <rpc/pmap_clnt.h>

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

/*
 * Set a mapping between program,version and port.
 * Calls the pmap service remotely to do the mapping.
 */
bool_t
pmap_set(u_long program, u_long version, u_int protocol, int iport)
{
	struct sockaddr_in myaddress;
	int sock = -1;
	CLIENT *client;
	struct pmap parms;
	bool_t rslt;
	u_short port = iport;

	if (get_myaddress(&myaddress) != 0)
		return (FALSE);
	myaddress.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
	client = clntudp_bufcreate(&myaddress, PMAPPROG, PMAPVERS,
	    timeout, &sock, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
	if (client == NULL)
		return (FALSE);
	parms.pm_prog = program;
	parms.pm_vers = version;
	parms.pm_prot = protocol;
	parms.pm_port = port;
	if (CLNT_CALL(client, PMAPPROC_SET, xdr_pmap, &parms, xdr_bool, &rslt,
	    tottimeout) != RPC_SUCCESS) {
		int save_errno = errno;

		clnt_perror(client, "Cannot register service");
		errno = save_errno;
		return (FALSE);
	}
	CLNT_DESTROY(client);
	if (sock != -1)
		(void)close(sock);
	return (rslt);
}

/*
 * Remove the mapping between program,version and port.
 * Calls the pmap service remotely to do the un-mapping.
 */
bool_t
pmap_unset(u_long program, u_long version)
{
	struct sockaddr_in myaddress;
	int sock = -1;
	CLIENT *client;
	struct pmap parms;
	bool_t rslt;

	if (get_myaddress(&myaddress) != 0)
		return (FALSE);
	myaddress.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
	client = clntudp_bufcreate(&myaddress, PMAPPROG, PMAPVERS,
	    timeout, &sock, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
	if (client == NULL)
		return (FALSE);
	parms.pm_prog = program;
	parms.pm_vers = version;
	parms.pm_port = parms.pm_prot = 0;
	CLNT_CALL(client, PMAPPROC_UNSET, xdr_pmap, &parms, xdr_bool, &rslt,
	    tottimeout);
	CLNT_DESTROY(client);
	if (sock != -1)
		(void)close(sock);
	return (rslt);
}