1 /*

     2  * Copyright (c) 1999, 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.

     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

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    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 /* @test

    25  * @bug 4203167

    26  *

    27  * @summary RMI blocks in HttpAwareServerSocket.accept() if you telnet to it

    28  * @author Adrian Colley

    29  *

    30  * @library ../../../../../java/rmi/testlibrary

    31  * @modules java.rmi/sun.rmi.transport.proxy

    32  * @build TestIface TestImpl TestImpl_Stub

    33  * @run main/othervm/policy=security.policy/timeout=60 BlockAcceptTest

    34  */

    35 

    36 /* This test attempts to stymie the RMI accept loop.  The accept loop in

    37  * RMI endlessly accepts a connection, spawns a thread for it, and repeats.

    38  * The accept() call can be replaced by a user-supplied library which

    39  * might foolishly block indefinitely in its accept() method, which would

    40  * prevent RMI from accepting other connections on that socket.

    41  *

    42  * Unfortunately, HttpAwareServerSocket (default server socket) is/was such

    43  * a foolish thing.  It reads 4 bytes to see if they're "POST" before

    44  * returning.  The bug fix is to move the HTTP stuff into the mainloop,

    45  * which has the side effect of enabling it for non-default socketfactories.

    46  *

    47  * This test:

    48  * 1. Creates an object and exports it.

    49  * 2. Connects to the listening RMI port and sends nothing, to hold it up.

    50  * 3. Makes a regular call, using HTTP tunnelling.

    51  * 4. Fails to deadlock, thereby passing the test.

    52  *

    53  * Some runtime dependencies I'm trying to eliminate:

    54  * 1. We don't know the port number until after exporting the object, but

    55  *    have to set it in http.proxyPort somehow.  Hopefully http.proxyPort

    56  *    isn't read too soon or this test will fail with a ConnectException.

    57  */

    58 

    59 import java.rmi.*;

    60 import java.rmi.server.RMISocketFactory;

    61 import java.io.*;

    62 import java.net.*;

    63 

    64 import sun.rmi.transport.proxy.RMIMasterSocketFactory;

    65 import sun.rmi.transport.proxy.RMIHttpToPortSocketFactory;

    66 

    67 public class BlockAcceptTest

    68 {

    69     public static void main(String[] args)

    70         throws Exception

    71     {

    72         // Make trouble for ourselves

    73         if (System.getSecurityManager() == null)

    74             System.setSecurityManager(new RMISecurityManager());

    75 

    76         // HTTP direct to the server port

    77         System.setProperty("http.proxyHost", "127.0.0.1");

    78 

    79         // Set the socket factory.

    80         System.err.println("(installing HTTP-out socket factory)");

    81         HttpOutFactory fac = new HttpOutFactory();

    82         RMISocketFactory.setSocketFactory(fac);

    83 

    84         // Create remote object

    85         TestImpl impl = new TestImpl();

    86 

    87         // Export and get which port.

    88         System.err.println("(exporting remote object)");

    89         TestIface stub = impl.export();

    90         try {

    91             int port = fac.whichPort();

    92 

    93             // Sanity

    94             if (port == 0)

    95                 throw new Error("TEST FAILED: export didn't reserve a port(?)");

    96 

    97             // Set the HTTP port, at last.

    98             System.setProperty("http.proxyPort", port+"");

    99 

   100             // Now, connect to that port

   101             //Thread.sleep(2000);

   102             System.err.println("(connecting to listening port on 127.0.0.1:" +

   103                                port + ")");

   104             Socket DoS = new Socket("127.0.0.1", port);

   105             // we hold the connection open until done with the test.

   106 

   107             // The test itself: make a remote call and see if it's blocked or

   108             // if it works

   109             //Thread.sleep(2000);

   110             System.err.println("(making RMI-through-HTTP call)");

   111             System.err.println("(typical test failure deadlocks here)");

   112             String result = stub.testCall("dummy load");

   113 

   114             System.err.println(" => " + result);

   115             if (!("OK".equals(result)))

   116                 throw new Error("TEST FAILED: result not OK");

   117             System.err.println("Test passed.");

   118 

   119             // Clean up, including writing a byte to that connection just in

   120             // case an optimizer thought of optimizing it out of existence

   121             try {

   122                 DoS.getOutputStream().write(0);

   123                 DoS.getOutputStream().close();

   124             } catch (Throwable apathy) {

   125             }

   126 

   127         } finally {

   128             try {

   129                 impl.unexport();

   130             } catch (Throwable unmatter) {

   131             }

   132         }

   133 

   134         // Should exit here

   135     }

   136 

   137     private static class HttpOutFactory

   138         extends RMISocketFactory

   139     {

   140         private int servport = 0;

   141 

   142         public Socket createSocket(String h, int p)

   143             throws IOException

   144         {

   145             return ((new RMIHttpToPortSocketFactory()).createSocket(h, p));

   146         }

   147 

   148         /** Create a server socket and remember which port it's on.

   149          * Aborts if createServerSocket(0) is called twice, because then

   150          * it doesn't know whether to remember the first or second port.

   151          */

   152         public ServerSocket createServerSocket(int p)

   153             throws IOException

   154         {

   155             ServerSocket ss;

   156             ss = (new RMIMasterSocketFactory()).createServerSocket(p);

   157             if (p == 0) {

   158                 if (servport != 0) {

   159                     System.err.println("TEST FAILED: " +

   160                                        "Duplicate createServerSocket(0)");

   161                     throw new Error("Test aborted (createServerSocket)");

   162                 }

   163                 servport = ss.getLocalPort();

   164             }

   165             return (ss);

   166         }

   167 

   168         /** Return which port was reserved by createServerSocket(0).

   169          * If the return value was 0, createServerSocket(0) wasn't called.

   170          */

   171         public int whichPort() {

   172             return (servport);

   173         }

   174     } // end class HttpOutFactory

   175 }