1/*	$OpenBSD: yppoll.c,v 1.15 2015/01/16 06:40:22 deraadt Exp $ */
2/*	$NetBSD: yppoll.c,v 1.5 1996/05/13 02:46:36 thorpej Exp $	*/
3
4/*-
5 * SPDX-License-Identifier: BSD-3-Clause
6 *
7 * Copyright (c) 1992, 1993 Theo de Raadt <deraadt@openbsd.org>
8 * Copyright (c) 1992, 1993 John Brezak
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. The name of the author may not be used to endorse or promote
20 *    products derived from this software without specific prior written
21 *    permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
24 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
25 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
27 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#include <sys/param.h>
37#include <sys/types.h>
38#include <sys/socket.h>
39
40#include <arpa/inet.h>
41#include <netinet/in.h>
42
43#include <ctype.h>
44#include <err.h>
45#include <netdb.h>
46#include <stdio.h>
47#include <stdlib.h>
48#include <string.h>
49#include <time.h>
50#include <unistd.h>
51
52#include <rpc/rpc.h>
53#include <rpc/xdr.h>
54#include <rpcsvc/yp_prot.h>
55#include <rpcsvc/ypclnt.h>
56
57static void
58usage(void)
59{
60	fprintf(stderr, "usage: yppoll [-d domain] [-h host] mapname\n");
61	exit(1);
62}
63
64static int
65get_remote_info(char *indomain, char *inmap, char *server, int *outorder,
66    char **outname)
67{
68	struct ypresp_order ypro;
69	struct ypresp_master yprm;
70	struct ypreq_nokey yprnk;
71	struct timeval tv;
72	struct sockaddr_in rsrv_sin;
73	int rsrv_sock;
74	CLIENT *client;
75	struct hostent *h;
76	int r;
77
78	bzero((char *)&rsrv_sin, sizeof rsrv_sin);
79	rsrv_sin.sin_len = sizeof rsrv_sin;
80	rsrv_sin.sin_family = AF_INET;
81	rsrv_sock = RPC_ANYSOCK;
82
83	h = gethostbyname(server);
84	if (h == NULL) {
85		if (inet_aton(server, &rsrv_sin.sin_addr) == 0)
86			errx(1, "unknown host %s.", server);
87	} else
88		rsrv_sin.sin_addr.s_addr = *(u_int32_t *)h->h_addr;
89
90	tv.tv_sec = 10;
91	tv.tv_usec = 0;
92
93	client = clntudp_create(&rsrv_sin, YPPROG, YPVERS, tv, &rsrv_sock);
94	if (client == NULL)
95		errx(1, "clntudp_create: no contact with host %s.", server);
96
97	yprnk.domain = indomain;
98	yprnk.map = inmap;
99
100	bzero((char *)(char *)&ypro, sizeof ypro);
101
102	r = clnt_call(client, YPPROC_ORDER, (xdrproc_t)xdr_ypreq_nokey, &yprnk,
103	    (xdrproc_t)xdr_ypresp_order, &ypro, tv);
104	if (r != RPC_SUCCESS)
105		clnt_perror(client, "yp_order: clnt_call");
106
107	*outorder = ypro.ordernum;
108	xdr_free((xdrproc_t)xdr_ypresp_order, (char *)&ypro);
109
110	r = ypprot_err(ypro.status);
111	if (r == RPC_SUCCESS) {
112		bzero((char *)&yprm, sizeof yprm);
113
114		r = clnt_call(client, YPPROC_MASTER, (xdrproc_t)xdr_ypreq_nokey,
115		    &yprnk, (xdrproc_t)xdr_ypresp_master, &yprm, tv);
116		if (r != RPC_SUCCESS)
117			clnt_perror(client, "yp_master: clnt_call");
118		r = ypprot_err(yprm.status);
119		if (r == 0)
120			*outname = (char *)strdup(yprm.master);
121		xdr_free((xdrproc_t)xdr_ypresp_master, (char *)&yprm);
122	}
123	clnt_destroy(client);
124	return (r);
125}
126
127int
128main(int argc, char *argv[])
129{
130	char *domainname, *hostname = NULL, *inmap, *master;
131	int order, c, r;
132	time_t torder;
133
134	yp_get_default_domain(&domainname);
135
136	while ((c = getopt(argc, argv, "h:d:")) != -1)
137		switch (c) {
138		case 'd':
139			domainname = optarg;
140			break;
141		case 'h':
142			hostname = optarg;
143			break;
144		default:
145			usage();
146			/*NOTREACHED*/
147		}
148
149	if (optind + 1 != argc)
150		usage();
151	inmap = argv[optind];
152
153	if (hostname != NULL) {
154		r = get_remote_info(domainname, inmap, hostname,
155		    &order, &master);
156	} else {
157		r = yp_order(domainname, inmap, &order);
158		if (r == 0)
159			r = yp_master(domainname, inmap, &master);
160	}
161
162	if (r != 0)
163		errx(1, "no such map %s: reason: %s",
164		    inmap, yperr_string(r));
165
166	torder = order;
167	printf("Map %s has order number %lld. %s", inmap,
168	    (long long)order, ctime(&torder));
169	printf("The master server is %s.\n", master);
170
171	exit(0);
172}
173