0N/A/*
2362N/A * Copyright (c) 2002, 2004, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation.
0N/A *
2362N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
0N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
0N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
2362N/A */
2362N/A
0N/Aimport java.net.InetAddress;
0N/Aimport java.util.*;
0N/Aimport javax.naming.*;
0N/Aimport javax.naming.directory.*;
0N/A
0N/A/*
0N/A * Tests if a canonical name (CNAME) record exists for a
0N/A * specified host - throws exception if DNS isn't configured
0N/A * or there isn't a CNAME record.
0N/A */
0N/A
0N/Apublic class CanonicalName {
0N/A
0N/A public static void main(String args[]) throws Exception {
0N/A final Hashtable<String,String> env = new Hashtable<String,String>();
0N/A env.put("java.naming.factory.initial",
0N/A "com.sun.jndi.dns.DnsContextFactory");
0N/A DirContext ctx = new InitialDirContext(env);
0N/A
0N/A String ids[] = { "CNAME" };
0N/A Attributes attrs = ctx.getAttributes(args[0], ids);
0N/A
0N/A NamingEnumeration ne = attrs.getAll();
0N/A if (!ne.hasMoreElements()) {
0N/A throw new Exception("no CNAME record");
0N/A }
0N/A
0N/A // print out the CNAME records
0N/A
0N/A while (ne.hasMoreElements()) {
0N/A Attribute attr = (Attribute)ne.next();
0N/A for (NamingEnumeration e = attr.getAll(); e.hasMoreElements();) {
0N/A System.out.println(args[0] + " -> " + e.next());
0N/A }
0N/A }
0N/A
0N/A }
0N/A}
0N/A