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  */
  29 
  30 
  31 import java.net.*;
  32 import java.io.*;
  33 import java.util.*;
  34 
  35 
  36 /*
  37  *
  38  * What this testcase is to test is a (weird) coupling through the
  39  * cached_scope_id field of java.net.Inet6Address. Native method
  40  * NET_InetAddressToSockaddr as in Linux platform will try to write
  41  * and read this field, therefore Inet6Address becomes 'stateful'.
  42  * So the coupling. Certain executive order, e.g. two methods use
  43  * the same Inet6Address instance as illustrated in this test case,
  44  * will show side effect of such coupling.
  45  *
  46  * And on Windows, NET_InetAddressToSockaddr() did not assign appropriate
  47  * sin6_scope_id value to sockaddr_in6 structure if there's no one coming
  48  * with Inet6Address instance, which caused bind exception. This test use
  49  * link-local address without %scope suffix, so it is also going to test
  50  * that.
  51  *
  52  */
  53 public class B6521014 {
  54 
  55     static InetAddress sin;
  56 
  57     static Inet6Address getLocalAddr () throws Exception {
  58         Enumeration e = NetworkInterface.getNetworkInterfaces();
  59         while (e.hasMoreElements()) {
  60             NetworkInterface ifc = (NetworkInterface) e.nextElement();
  61             if (!ifc.isUp())
  62                 continue;
  63             Enumeration addrs = ifc.getInetAddresses();
  64             while (addrs.hasMoreElements()) {
  65                 InetAddress a = (InetAddress)addrs.nextElement();
  66                 if (a instanceof Inet6Address) {
  67                     Inet6Address ia6 = (Inet6Address) a;
  68                     if (ia6.isLinkLocalAddress()) {
  69                         // remove %scope suffix
  70                         return (Inet6Address)InetAddress.getByAddress(ia6.getAddress());
  71                     }
  72                 }
  73             }
  74         }
  75         return null;
  76     }
  77 
  78     static void test1() throws Exception {
  79         ServerSocket ssock;
  80         Socket sock;
  81         int port;
  82 
  83         ssock = new ServerSocket(0);
  84         port = ssock.getLocalPort();
  85         sock = new Socket();
  86         try {
  87             sock.connect(new InetSocketAddress(sin, port), 100);
  88         } catch (SocketTimeoutException e) {
  89             // time out exception is okay
  90             System.out.println("timed out when connecting.");
  91         }
  92     }
  93 
  94     static void test2() throws Exception {
  95         Socket sock;
  96         ServerSocket ssock;
  97         int port;
  98 
  99         ssock = new ServerSocket(0);
 100         ssock.setSoTimeout(100);
 101         port = ssock.getLocalPort();
 102         sock = new Socket();
 103         sock.bind(new InetSocketAddress(sin, 0));
 104         try {
 105             sock.connect(new InetSocketAddress(sin, port), 100);
 106         } catch (SocketTimeoutException e) {
 107             // time out exception is okay
 108             System.out.println("timed out when connecting.");
 109         }
 110     }
 111 
 112     public static void main(String[] args) throws Exception {
 113         sin = getLocalAddr();
 114         if (sin == null) {
 115             System.out.println("Cannot find a link-local address.");
 116             return;
 117         }
 118 
 119         try {
 120             test1();
 121             test2();
 122         } catch (IOException e) {
 123             throw new RuntimeException("Test failed: cannot create socket.", e);
 124         }
 125     }
 126 }