1/*	$OpenBSD: ypset.c,v 1.20 2015/01/16 06:40:23 deraadt Exp $ */
2/*	$NetBSD: ypset.c,v 1.8 1996/05/13 02:46:33 thorpej Exp $	*/
3
4/*-
5 * SPDX-License-Identifier: BSD-2-Clause-NetBSD
6 *
7 * Copyright (c) 1992, 1993 Theo de Raadt <deraadt@theos.com>
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
20 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__FBSDID("$FreeBSD: stable/11/usr.sbin/ypset/ypset.c 330449 2018-03-05 07:26:05Z eadler $");
34
35#include <sys/param.h>
36#include <sys/types.h>
37#include <sys/socket.h>
38
39#include <err.h>
40#include <netdb.h>
41#include <stdio.h>
42#include <stdlib.h>
43#include <string.h>
44#include <unistd.h>
45
46#include <rpc/rpc.h>
47#include <rpc/xdr.h>
48#include <rpcsvc/yp.h>
49#include <rpcsvc/ypclnt.h>
50#include <arpa/inet.h>
51
52static void
53usage(void)
54{
55	fprintf(stderr, "usage: ypset [-d domain] [-h host] server\n");
56	exit(1);
57}
58
59static int
60bind_tohost(struct sockaddr_in *sin, char *dom, char *server)
61{
62	struct ypbind_setdom ypsd;
63	struct in_addr iaddr;
64	struct hostent *hp;
65	struct timeval tv;
66	CLIENT *client;
67	int sock, port, r;
68
69	port = getrpcport(server, YPPROG, YPPROC_NULL, IPPROTO_UDP);
70	if (port == 0)
71		errx(1, "%s not running ypserv", server);
72	port = htons(port);
73
74	memset(&ypsd, 0, sizeof ypsd);
75
76	if (inet_aton(server, &iaddr) == 0) {
77		hp = gethostbyname(server);
78		if (hp == NULL)
79			errx(1, "can't find address for %s", server);
80		memmove(&iaddr.s_addr, hp->h_addr, sizeof(iaddr.s_addr));
81	}
82	ypsd.ypsetdom_domain = dom;
83	bcopy(&iaddr.s_addr, &ypsd.ypsetdom_binding.ypbind_binding_addr,
84	    sizeof(ypsd.ypsetdom_binding.ypbind_binding_addr));
85	bcopy(&port, &ypsd.ypsetdom_binding.ypbind_binding_port,
86	    sizeof(ypsd.ypsetdom_binding.ypbind_binding_port));
87	ypsd.ypsetdom_vers = YPVERS;
88
89	tv.tv_sec = 15;
90	tv.tv_usec = 0;
91	sock = RPC_ANYSOCK;
92	client = clntudp_create(sin, YPBINDPROG, YPBINDVERS, tv, &sock);
93	if (client == NULL) {
94		warnx("can't yp_bind, reason: %s", yperr_string(YPERR_YPBIND));
95		return (YPERR_YPBIND);
96	}
97	client->cl_auth = authunix_create_default();
98
99	r = clnt_call(client, YPBINDPROC_SETDOM,
100		(xdrproc_t)xdr_ypbind_setdom, &ypsd,
101		(xdrproc_t)xdr_void, NULL, tv);
102	if (r) {
103		warnx("cannot ypset for domain %s on host %s: %s"
104                " - make sure ypbind was started with -ypset or -ypsetme", dom,
105		    server, clnt_sperrno(r));
106		clnt_destroy(client);
107		return (YPERR_YPBIND);
108	}
109	clnt_destroy(client);
110	return (0);
111}
112
113int
114main(int argc, char *argv[])
115{
116	struct sockaddr_in sin;
117	struct hostent *hent;
118	char *domainname;
119	int c;
120
121	yp_get_default_domain(&domainname);
122
123	bzero(&sin, sizeof sin);
124	sin.sin_family = AF_INET;
125	sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
126
127	while ((c = getopt(argc, argv, "h:d:")) != -1)
128		switch (c) {
129		case 'd':
130			domainname = optarg;
131			break;
132		case 'h':
133			if (inet_aton(optarg, &sin.sin_addr) == 0) {
134				hent = gethostbyname(optarg);
135				if (hent == NULL)
136					errx(1, "host %s unknown\n", optarg);
137				bcopy(hent->h_addr, &sin.sin_addr,
138				    sizeof(sin.sin_addr));
139			}
140			break;
141		default:
142			usage();
143		}
144
145	if (optind + 1 != argc)
146		usage();
147
148	if (bind_tohost(&sin, domainname, argv[optind]))
149		exit(1);
150	exit(0);
151}
152