xref: /src/lib/libc/rpc/getrpcport.c

/*	$NetBSD: getrpcport.c,v 1.18 2013/03/11 20:19:29 tron 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.
 */

#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char *sccsid = "@(#)getrpcport.c 1.3 87/08/11 SMI";
static char *sccsid = "@(#)getrpcport.c	2.1 88/07/29 4.0 RPCSRC";
#else
__RCSID("$NetBSD: getrpcport.c,v 1.18 2013/03/11 20:19:29 tron Exp $");
#endif
#endif

/*
 * Copyright (c) 1985 by Sun Microsystems, Inc.
 */

#include "namespace.h"

#include <sys/types.h>
#include <sys/socket.h>

#include <assert.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>

#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>

#ifdef __weak_alias
__weak_alias(getrpcport,_getrpcport)
#endif

int
getrpcport(char *host, int prognum, int versnum, int proto)
{
	struct sockaddr_in addr;
	struct hostent *hp;

	_DIAGASSERT(host != NULL);

	if ((hp = gethostbyname(host)) == NULL)
		return (0);
	memset(&addr, 0, sizeof(addr));
	addr.sin_len = sizeof(struct sockaddr_in);
	addr.sin_family = AF_INET;
	addr.sin_port =  0;
	if (hp->h_length > addr.sin_len)
		hp->h_length = addr.sin_len;
	memcpy(&addr.sin_addr.s_addr, hp->h_addr, (size_t)hp->h_length);
	/* Inconsistent interfaces need casts! :-( */
	return (pmap_getport(&addr, (u_long)prognum, (u_long)versnum,
	    (u_int)proto));
}