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 * Copyright (c) 1992, 1993 Theo de Raadt <deraadt@openbsd.org>
6 * Copyright (c) 1992, 1993 John Brezak
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. The name of the author may not be used to endorse or promote
18 *    products derived from this software without specific prior written
19 *    permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
22 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD: releng/11.0/usr.sbin/yppoll/yppoll.c 287424 2015-09-03 07:12:40Z araujo $");
36
37#include <sys/param.h>
38#include <sys/types.h>
39#include <sys/socket.h>
40
41#include <arpa/inet.h>
42#include <netinet/in.h>
43
44#include <ctype.h>
45#include <err.h>
46#include <netdb.h>
47#include <stdio.h>
48#include <stdlib.h>
49#include <string.h>
50#include <time.h>
51#include <unistd.h>
52
53#include <rpc/rpc.h>
54#include <rpc/xdr.h>
55#include <rpcsvc/yp_prot.h>
56#include <rpcsvc/ypclnt.h>
57
58static void
59usage(void)
60{
61	fprintf(stderr, "usage: yppoll [-d domain] [-h host] mapname\n");
62	exit(1);
63}
64
65static int
66get_remote_info(char *indomain, char *inmap, char *server, int *outorder,
67    char **outname)
68{
69	struct ypresp_order ypro;
70	struct ypresp_master yprm;
71	struct ypreq_nokey yprnk;
72	struct timeval tv;
73	struct sockaddr_in rsrv_sin;
74	int rsrv_sock;
75	CLIENT *client;
76	struct hostent *h;
77	int r;
78
79	bzero((char *)&rsrv_sin, sizeof rsrv_sin);
80	rsrv_sin.sin_len = sizeof rsrv_sin;
81	rsrv_sin.sin_family = AF_INET;
82	rsrv_sock = RPC_ANYSOCK;
83
84	h = gethostbyname(server);
85	if (h == NULL) {
86		if (inet_aton(server, &rsrv_sin.sin_addr) == 0)
87			errx(1, "unknown host %s.", server);
88	} else
89		rsrv_sin.sin_addr.s_addr = *(u_int32_t *)h->h_addr;
90
91	tv.tv_sec = 10;
92	tv.tv_usec = 0;
93
94	client = clntudp_create(&rsrv_sin, YPPROG, YPVERS, tv, &rsrv_sock);
95	if (client == NULL)
96		errx(1, "clntudp_create: no contact with host %s.", server);
97
98	yprnk.domain = indomain;
99	yprnk.map = inmap;
100
101	bzero((char *)(char *)&ypro, sizeof ypro);
102
103	r = clnt_call(client, YPPROC_ORDER, (xdrproc_t)xdr_ypreq_nokey, &yprnk,
104	    (xdrproc_t)xdr_ypresp_order, &ypro, tv);
105	if (r != RPC_SUCCESS)
106		clnt_perror(client, "yp_order: clnt_call");
107
108	*outorder = ypro.ordernum;
109	xdr_free((xdrproc_t)xdr_ypresp_order, (char *)&ypro);
110
111	r = ypprot_err(ypro.status);
112	if (r == RPC_SUCCESS) {
113		bzero((char *)&yprm, sizeof yprm);
114
115		r = clnt_call(client, YPPROC_MASTER, (xdrproc_t)xdr_ypreq_nokey,
116		    &yprnk, (xdrproc_t)xdr_ypresp_master, &yprm, tv);
117		if (r != RPC_SUCCESS)
118			clnt_perror(client, "yp_master: clnt_call");
119		r = ypprot_err(yprm.status);
120		if (r == 0)
121			*outname = (char *)strdup(yprm.master);
122		xdr_free((xdrproc_t)xdr_ypresp_master, (char *)&yprm);
123	}
124	clnt_destroy(client);
125	return (r);
126}
127
128int
129main(int argc, char *argv[])
130{
131	char *domainname, *hostname = NULL, *inmap, *master;
132	int order, c, r;
133	time_t torder;
134
135	yp_get_default_domain(&domainname);
136
137	while ((c = getopt(argc, argv, "h:d:")) != -1)
138		switch (c) {
139		case 'd':
140			domainname = optarg;
141			break;
142		case 'h':
143			hostname = optarg;
144			break;
145		default:
146			usage();
147			/*NOTREACHED*/
148		}
149
150	if (optind + 1 != argc)
151		usage();
152	inmap = argv[optind];
153
154	if (hostname != NULL) {
155		r = get_remote_info(domainname, inmap, hostname,
156		    &order, &master);
157	} else {
158		r = yp_order(domainname, inmap, &order);
159		if (r == 0)
160			r = yp_master(domainname, inmap, &master);
161	}
162
163	if (r != 0)
164		errx(1, "no such map %s: reason: %s",
165		    inmap, yperr_string(r));
166
167	torder = order;
168	printf("Map %s has order number %lld. %s", inmap,
169	    (long long)order, ctime(&torder));
170	printf("The master server is %s.\n", master);
171
172	exit(0);
173}
174