src/windows/classes/sun/nio/ch/PipeImpl.java

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   1 /*
   2  * Copyright (c) 2002, 2008, 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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any


  55     // Random object for handshake values
  56     private static final Random rnd;
  57 
  58     static {
  59         Util.load();
  60         byte[] someBytes = new byte[8];
  61         boolean resultOK = IOUtil.randomBytes(someBytes);
  62         if (resultOK) {
  63             rnd = new Random(ByteBuffer.wrap(someBytes).getLong());
  64         } else {
  65             rnd = new Random();
  66         }
  67     }
  68 
  69     private class Initializer
  70         implements PrivilegedExceptionAction<Void>
  71     {
  72 
  73         private final SelectorProvider sp;
  74 


  75         private Initializer(SelectorProvider sp) {
  76             this.sp = sp;
  77         }
  78 

  79         public Void run() throws IOException {


  80             ServerSocketChannel ssc = null;
  81             SocketChannel sc1 = null;
  82             SocketChannel sc2 = null;
  83 
  84             try {
  85                 // loopback address
  86                 InetAddress lb = InetAddress.getByName("127.0.0.1");
  87                 assert(lb.isLoopbackAddress());
  88 
  89                 // bind ServerSocketChannel to a port on the loopback address



  90                 ssc = ServerSocketChannel.open();
  91                 ssc.socket().bind(new InetSocketAddress(lb, 0));



  92 
  93                 // Establish connection (assumes connections are eagerly
  94                 // accepted)
  95                 InetSocketAddress sa
  96                     = new InetSocketAddress(lb, ssc.socket().getLocalPort());
  97                 sc1 = SocketChannel.open(sa);
  98 
  99                 ByteBuffer bb = ByteBuffer.allocate(8);
 100                 long secret = rnd.nextLong();
 101                 bb.putLong(secret).flip();
 102                 sc1.write(bb);
 103 
 104                 // Get a connection and verify it is legitimate
 105                 for (;;) {
 106                     sc2 = ssc.accept();
 107                     bb.clear();
 108                     sc2.read(bb);
 109                     bb.rewind();
 110                     if (bb.getLong() == secret)
 111                         break;
 112                     sc2.close();

 113                 }
 114 
 115                 // Create source and sink channels
 116                 source = new SourceChannelImpl(sp, sc1);
 117                 sink = new SinkChannelImpl(sp, sc2);
 118             } catch (IOException e) {
 119                 try {
 120                     if (sc1 != null)
 121                         sc1.close();
 122                     if (sc2 != null)
 123                         sc2.close();
 124                 } catch (IOException e2) { }
 125                 IOException x = new IOException("Unable to establish"
 126                                                 + " loopback connection");
 127                 x.initCause(e);
 128                 throw x;


 129             } finally {
 130                 try {
 131                     if (ssc != null)
 132                         ssc.close();
 133                 } catch (IOException e2) { }
 134             }




 135             return null;



















































































 136         }
 137     }
 138 
 139     PipeImpl(final SelectorProvider sp) throws IOException {
 140         try {
 141             AccessController.doPrivileged(new Initializer(sp));
 142         } catch (PrivilegedActionException x) {
 143             throw (IOException)x.getCause();
 144         }
 145     }
 146 
 147 
 148     public SourceChannel source() {
 149         return source;
 150     }
 151 
 152     public SinkChannel sink() {
 153         return sink;
 154     }
 155 
   1 /*
   2  * Copyright (c) 2002, 2012, 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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any


  55     // Random object for handshake values
  56     private static final Random rnd;
  57 
  58     static {
  59         Util.load();
  60         byte[] someBytes = new byte[8];
  61         boolean resultOK = IOUtil.randomBytes(someBytes);
  62         if (resultOK) {
  63             rnd = new Random(ByteBuffer.wrap(someBytes).getLong());
  64         } else {
  65             rnd = new Random();
  66         }
  67     }
  68 
  69     private class Initializer
  70         implements PrivilegedExceptionAction<Void>
  71     {
  72 
  73         private final SelectorProvider sp;
  74 
  75         private IOException ioe = null;
  76 
  77         private Initializer(SelectorProvider sp) {
  78             this.sp = sp;
  79         }
  80 
  81         @Override
  82         public Void run() throws IOException {
  83             boolean interrupted = false;
  84 
  85             ServerSocketChannel ssc = null;
  86             SocketChannel sc1 = null;
  87             SocketChannel sc2 = null;
  88 
  89             try {
  90                 // loopback address
  91                 InetAddress lb = InetAddress.getByName("127.0.0.1");
  92                 assert(lb.isLoopbackAddress());
  93                 InetSocketAddress sa = null;
  94                 for(;;) {
  95                     // bind ServerSocketChannel to a port on the loopback
  96                     // address
  97                     if (ssc == null || !ssc.isOpen()) {
  98                         ssc = ServerSocketChannel.open();
  99                         ssc.socket().bind(new InetSocketAddress(lb, 0));
 100                         sa = new InetSocketAddress(lb,
 101                                 ssc.socket().getLocalPort());
 102                     }
 103 
 104                     // Establish connection (assume connections are eagerly
 105                     // accepted)


 106                     sc1 = SocketChannel.open(sa);

 107                     ByteBuffer bb = ByteBuffer.allocate(8);
 108                     long secret = rnd.nextLong();
 109                     bb.putLong(secret).flip();
 110                     sc1.write(bb);
 111 
 112                     // Get a connection and verify it is legitimate

 113                     sc2 = ssc.accept();
 114                     bb.clear();
 115                     sc2.read(bb);
 116                     bb.rewind();
 117                     if (bb.getLong() == secret)
 118                         break;
 119                     sc2.close();
 120                     sc1.close();
 121                 }
 122 
 123                 // Create source and sink channels
 124                 source = new SourceChannelImpl(sp, sc1);
 125                 sink = new SinkChannelImpl(sp, sc2);
 126             } catch (IOException e) {
 127                 try {
 128                     if (sc1 != null)
 129                         sc1.close();
 130                     if (sc2 != null)
 131                         sc2.close();
 132                 } catch (IOException e2) {}
 133 
 134                 if (!(e instanceof ClosedByInterruptException))
 135                     throw new IOException("Unable to establish loopback"
 136                             + " connection", e);
 137                 interrupted = true;
 138                 Thread.interrupted();
 139             } finally {
 140                 try {
 141                     if (ssc != null)
 142                         ssc.close();
 143                 } catch (IOException e2) {}
 144             }
 145 
 146             if (interrupted)
 147                 UninterruptibleConnect();
 148 
 149             return null;
 150         }
 151 
 152         // Use short-lived uninterruptible thread to establish
 153         // loopback connections
 154         private void UninterruptibleConnect() throws IOException {
 155             Thread connector = new Thread("UninterruptibleConnector") {
 156                 ServerSocketChannel ssc = null;
 157                 SocketChannel sc1 = null;
 158                 SocketChannel sc2 = null;
 159 
 160                 @Override
 161                 public void run() {
 162                     try {
 163                         // loopback address
 164                         InetAddress lb = InetAddress.getByName("127.0.0.1");
 165                         assert(lb.isLoopbackAddress());
 166                         InetSocketAddress sa = null;
 167 
 168                         for (;;) {
 169                             // bind ServerSocketChannel to a port on the
 170                             // loopback address
 171                             if (ssc == null || !ssc.isOpen()) {
 172                                 ssc = ServerSocketChannel.open();
 173                                 ssc.socket().bind(new InetSocketAddress(lb, 0));
 174                                 sa = new InetSocketAddress(lb,
 175                                         ssc.socket().getLocalPort());
 176                             }
 177                             assert(sa != null);
 178 
 179                             // Establish connection (assumes connections are
 180                             // eagerly accepted)
 181                             sc1 = SocketChannel.open(sa);
 182                             ByteBuffer bb = ByteBuffer.allocate(8);
 183                             long secret = rnd.nextLong();
 184                             bb.putLong(secret).flip();
 185                             sc1.write(bb);
 186 
 187                             // Get a connection and verify it is legitimate
 188                             sc2 = ssc.accept();
 189                             bb.clear();
 190                             sc2.read(bb);
 191                             bb.rewind();
 192                             if (bb.getLong() == secret)
 193                                 break;
 194                             sc2.close();
 195                             sc1.close();
 196                         }
 197 
 198                         // Create source and sink channels
 199                         source = new SourceChannelImpl(sp, sc1);
 200                         sink = new SinkChannelImpl(sp, sc2);
 201                     } catch (IOException e) {
 202                         try {
 203                             if (sc1 != null)
 204                                 sc1.close();
 205                             if (sc2 != null)
 206                                 sc2.close();
 207                         } catch (IOException e2) {}
 208                         ioe = e;
 209                     } finally {
 210                         try {
 211                             if (ssc != null)
 212                                 ssc.close();
 213                         } catch (IOException e2) {}
 214                     }
 215                 }
 216 
 217                 @Override
 218                 public void interrupt() {}
 219             };
 220             connector.start();
 221             for(;;) {
 222                 try {
 223                     connector.join();
 224                     break;
 225                 } catch (InterruptedException ex) {}
 226             }
 227 
 228             Thread.currentThread().interrupt();
 229 
 230             if (ioe != null || source == null || sink == null)
 231                 throw new IOException("Unable to establish loopback connection",
 232                         ioe);
 233         }
 234     }
 235 
 236     PipeImpl(final SelectorProvider sp) throws IOException {
 237         try {
 238             AccessController.doPrivileged(new Initializer(sp));
 239         } catch (PrivilegedActionException x) {
 240             throw (IOException)x.getCause();
 241         }
 242     }
 243 
 244 
 245     public SourceChannel source() {
 246         return source;
 247     }
 248 
 249     public SinkChannel sink() {
 250         return sink;
 251     }
 252