1 /*
   2  * Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 6521014 6543428
  27  * @summary IOException thrown when Socket tries to bind to an local IPv6 address on SuSE Linux
  28  * @library /lib/testlibrary
  29  * @build jdk.testlibrary.NetworkConfiguration
  30  * @run main B6521014
  31  */
  32 
  33 import java.net.*;
  34 import java.io.*;
  35 import java.util.*;
  36 import jdk.testlibrary.NetworkConfiguration;
  37 
  38 /*
  39  *
  40  * What this testcase is to test is a (weird) coupling through the
  41  * cached_scope_id field of java.net.Inet6Address. Native method
  42  * NET_InetAddressToSockaddr as in Linux platform will try to write
  43  * and read this field, therefore Inet6Address becomes 'stateful'.
  44  * So the coupling. Certain executive order, e.g. two methods use
  45  * the same Inet6Address instance as illustrated in this test case,
  46  * will show side effect of such coupling.
  47  *
  48  * And on Windows, NET_InetAddressToSockaddr() did not assign appropriate
  49  * sin6_scope_id value to sockaddr_in6 structure if there's no one coming
  50  * with Inet6Address instance, which caused bind exception. This test use
  51  * link-local address without %scope suffix, so it is also going to test
  52  * that.
  53  *
  54  */
  55 public class B6521014 {
  56 
  57     static Inet6Address removeScope(Inet6Address addr) {
  58         try {
  59             return (Inet6Address)InetAddress.getByAddress(addr.getAddress());
  60         } catch (IOException e) {
  61             throw new UncheckedIOException(e);
  62         }
  63     }
  64 
  65     static Optional<Inet6Address> getLocalAddr() throws Exception {
  66         return NetworkConfiguration.probe()
  67                 .ip6Addresses()
  68                 .filter(Inet6Address::isLinkLocalAddress)
  69                 .map(B6521014::removeScope)
  70                 .findFirst();
  71     }
  72 
  73     static void test1(Inet6Address sin) throws Exception {
  74         try (ServerSocket ssock = new ServerSocket(0);
  75              Socket sock = new Socket()) {
  76             int port = ssock.getLocalPort();
  77             sock.connect(new InetSocketAddress(sin, port), 100);
  78         } catch (SocketTimeoutException e) {
  79             // time out exception is okay
  80             System.out.println("timed out when connecting.");
  81         }
  82     }
  83 
  84     static void test2(Inet6Address sin) throws Exception {
  85         try (ServerSocket ssock = new ServerSocket(0);
  86              Socket sock = new Socket()) {
  87             int port = ssock.getLocalPort();
  88             ssock.setSoTimeout(100);
  89             sock.bind(new InetSocketAddress(sin, 0));
  90             sock.connect(new InetSocketAddress(sin, port), 100);
  91         } catch (SocketTimeoutException expected) {
  92             // time out exception is okay
  93             System.out.println("timed out when connecting.");
  94         }
  95     }
  96 
  97     public static void main(String[] args) throws Exception {
  98         Optional<Inet6Address> oaddr = getLocalAddr();
  99         if (!oaddr.isPresent()) {
 100             System.out.println("Cannot find a link-local address.");
 101             return;
 102         }
 103 
 104         Inet6Address addr = oaddr.get();
 105         System.out.println("Using " + addr);
 106         test1(addr);
 107         test2(addr);
 108     }
 109 }