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 58 usage(void) 59 { 60 fprintf(stderr, "usage: yppoll [-d domain] [-h host] mapname\n"); 61 exit(1); 62 } 63 64 static int 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 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