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
57 static void
usage(void)58 usage(void)
59 {
60 fprintf(stderr, "usage: yppoll [-d domain] [-h host] mapname\n");
61 exit(1);
62 }
63
64 static int
get_remote_info(char * indomain,char * inmap,char * server,int * outorder,char ** outname)65 get_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
127 int
main(int argc,char * argv[])128 main(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