1/*
2 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
7 * Reserved.  This file contains Original Code and/or Modifications of
8 * Original Code as defined in and that are subject to the Apple Public
9 * Source License Version 1.1 (the "License").  You may not use this file
10 * except in compliance with the License.  Please obtain a copy of the
11 * License at http://www.apple.com/publicsource and read it before using
12 * this file.
13 *
14 * The Original Code and all software distributed under the License are
15 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
19 * License for the specific language governing rights and limitations
20 * under the License.
21 *
22 * @APPLE_LICENSE_HEADER_END@
23 */
24/*
25 * Copyright (c) 1992, 1993 Theo de Raadt <deraadt@theos.com>
26 * All rights reserved.
27 *
28 * Redistribution and use in source and binary forms, with or without
29 * modification, are permitted provided that the following conditions
30 * are met:
31 * 1. Redistributions of source code must retain the above copyright
32 *    notice, this list of conditions and the following disclaimer.
33 * 2. Redistributions in binary form must reproduce the above copyright
34 *    notice, this list of conditions and the following disclaimer in the
35 *    documentation and/or other materials provided with the distribution.
36 * 3. All advertising materials mentioning features or use of this software
37 *    must display the following acknowledgement:
38 *	This product includes software developed by Theo de Raadt.
39 * 4. The name of the author may not be used to endorse or promote products
40 *    derived from this software without specific prior written permission.
41 *
42 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
43 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
44 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
45 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
46 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
47 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
48 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
49 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
50 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
51 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * SUCH DAMAGE.
53 */
54
55#if defined(LIBC_SCCS) && !defined(lint)
56static char *rcsid = "$OpenBSD: yp_master.c,v 1.5 1996/12/03 08:20:05 deraadt Exp $";
57#endif /* LIBC_SCCS and not lint */
58
59#include <sys/param.h>
60#include <sys/types.h>
61#include <sys/socket.h>
62#include <sys/file.h>
63#include <sys/uio.h>
64#include <errno.h>
65#include <stdio.h>
66#include <stdlib.h>
67#include <string.h>
68#include <unistd.h>
69#include <rpc/rpc.h>
70#include <rpc/xdr.h>
71#include <rpcsvc/yp.h>
72#include <rpcsvc/ypclnt.h>
73#include "ypinternal.h"
74
75int
76yp_master(indomain, inmap, outname)
77	const char     *indomain;
78	const char     *inmap;
79	char          **outname;
80{
81	struct dom_binding *ysd;
82	struct ypresp_master yprm;
83	struct ypreq_nokey yprnk;
84	struct timeval  tv;
85	int tries = 0, r;
86	static int proto = YP_BIND_UDP;
87
88	if (indomain == NULL || *indomain == '\0' ||
89	    strlen(indomain) > YPMAXDOMAIN || inmap == NULL ||
90	    *inmap == '\0' || strlen(inmap) > YPMAXMAP || outname == NULL)
91		return YPERR_BADARGS;
92
93again:
94	if (_yp_dobind(indomain, &ysd) != 0)
95		return YPERR_DOMAIN;
96
97	tv.tv_sec = _yplib_timeout;
98	tv.tv_usec = 0;
99
100	yprnk.domain = (char *)indomain;
101	yprnk.map = (char *)inmap;
102
103	(void)memset(&yprm, 0, sizeof yprm);
104
105	r = clnt_call(ysd->dom_client, YPPROC_MASTER, (xdrproc_t)xdr_ypreq_nokey, &yprnk, (xdrproc_t)xdr_ypresp_master, &yprm, tv);
106	if (r != RPC_SUCCESS)
107	{
108		if (tries++) clnt_perror(ysd->dom_client, "yp_master: clnt_call");
109
110		if (proto == YP_BIND_UDP) proto = YP_BIND_TCP;
111		else proto = YP_BIND_UDP;
112		ysd->dom_vers = proto;
113
114		goto again;
115	}
116
117	if (!(r = ypprot_err(yprm.stat))) {
118		if ((*outname = strdup(yprm.peer)) == NULL)
119			r = YPERR_RESRC;
120	}
121	xdr_free((xdrproc_t)xdr_ypresp_master, (char *) &yprm);
122	_yp_unbind(ysd);
123	return r;
124}
125