J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1999-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any 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 | * @build TestIface |
| 32 | * @build TestImpl |
| 33 | * @build TestImpl_Stub |
| 34 | * @build BlockAcceptTest |
| 35 | * @run main/othervm/policy=security.policy/timeout=60 BlockAcceptTest |
| 36 | */ |
| 37 | |
| 38 | /* This test attempts to stymie the RMI accept loop. The accept loop in |
| 39 | * RMI endlessly accepts a connection, spawns a thread for it, and repeats. |
| 40 | * The accept() call can be replaced by a user-supplied library which |
| 41 | * might foolishly block indefinitely in its accept() method, which would |
| 42 | * prevent RMI from accepting other connections on that socket. |
| 43 | * |
| 44 | * Unfortunately, HttpAwareServerSocket (default server socket) is/was such |
| 45 | * a foolish thing. It reads 4 bytes to see if they're "POST" before |
| 46 | * returning. The bug fix is to move the HTTP stuff into the mainloop, |
| 47 | * which has the side effect of enabling it for non-default socketfactories. |
| 48 | * |
| 49 | * This test: |
| 50 | * 1. Creates an object and exports it. |
| 51 | * 2. Connects to the listening RMI port and sends nothing, to hold it up. |
| 52 | * 3. Makes a regular call, using HTTP tunnelling. |
| 53 | * 4. Fails to deadlock, thereby passing the test. |
| 54 | * |
| 55 | * Some runtime dependencies I'm trying to eliminate: |
| 56 | * 1. We don't know the port number until after exporting the object, but |
| 57 | * have to set it in http.proxyPort somehow. Hopefully http.proxyPort |
| 58 | * isn't read too soon or this test will fail with a ConnectException. |
| 59 | */ |
| 60 | |
| 61 | import java.rmi.*; |
| 62 | import java.rmi.server.RMISocketFactory; |
| 63 | import java.io.*; |
| 64 | import java.net.*; |
| 65 | |
| 66 | import sun.rmi.transport.proxy.RMIMasterSocketFactory; |
| 67 | import sun.rmi.transport.proxy.RMIHttpToPortSocketFactory; |
| 68 | |
| 69 | public class BlockAcceptTest |
| 70 | { |
| 71 | public static void main(String[] args) |
| 72 | throws Exception |
| 73 | { |
| 74 | // Make trouble for ourselves |
| 75 | if (System.getSecurityManager() == null) |
| 76 | System.setSecurityManager(new RMISecurityManager()); |
| 77 | |
| 78 | // HTTP direct to the server port |
| 79 | System.setProperty("http.proxyHost", "127.0.0.1"); |
| 80 | |
| 81 | // Set the socket factory. |
| 82 | System.err.println("(installing HTTP-out socket factory)"); |
| 83 | HttpOutFactory fac = new HttpOutFactory(); |
| 84 | RMISocketFactory.setSocketFactory(fac); |
| 85 | |
| 86 | // Create remote object |
| 87 | TestImpl impl = new TestImpl(); |
| 88 | |
| 89 | // Export and get which port. |
| 90 | System.err.println("(exporting remote object)"); |
| 91 | TestIface stub = impl.export(); |
| 92 | try { |
| 93 | int port = fac.whichPort(); |
| 94 | |
| 95 | // Sanity |
| 96 | if (port == 0) |
| 97 | throw new Error("TEST FAILED: export didn't reserve a port(?)"); |
| 98 | |
| 99 | // Set the HTTP port, at last. |
| 100 | System.setProperty("http.proxyPort", port+""); |
| 101 | |
| 102 | // Now, connect to that port |
| 103 | //Thread.sleep(2000); |
| 104 | System.err.println("(connecting to listening port on 127.0.0.1:" + |
| 105 | port + ")"); |
| 106 | Socket DoS = new Socket("127.0.0.1", port); |
| 107 | // we hold the connection open until done with the test. |
| 108 | |
| 109 | // The test itself: make a remote call and see if it's blocked or |
| 110 | // if it works |
| 111 | //Thread.sleep(2000); |
| 112 | System.err.println("(making RMI-through-HTTP call)"); |
| 113 | System.err.println("(typical test failure deadlocks here)"); |
| 114 | String result = stub.testCall("dummy load"); |
| 115 | |
| 116 | System.err.println(" => " + result); |
| 117 | if (!("OK".equals(result))) |
| 118 | throw new Error("TEST FAILED: result not OK"); |
| 119 | System.err.println("Test passed."); |
| 120 | |
| 121 | // Clean up, including writing a byte to that connection just in |
| 122 | // case an optimizer thought of optimizing it out of existence |
| 123 | try { |
| 124 | DoS.getOutputStream().write(0); |
| 125 | DoS.getOutputStream().close(); |
| 126 | } catch (Throwable apathy) { |
| 127 | } |
| 128 | |
| 129 | } finally { |
| 130 | try { |
| 131 | impl.unexport(); |
| 132 | } catch (Throwable unmatter) { |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | // Should exit here |
| 137 | } |
| 138 | |
| 139 | private static class HttpOutFactory |
| 140 | extends RMISocketFactory |
| 141 | { |
| 142 | private int servport = 0; |
| 143 | |
| 144 | public Socket createSocket(String h, int p) |
| 145 | throws IOException |
| 146 | { |
| 147 | return ((new RMIHttpToPortSocketFactory()).createSocket(h, p)); |
| 148 | } |
| 149 | |
| 150 | /** Create a server socket and remember which port it's on. |
| 151 | * Aborts if createServerSocket(0) is called twice, because then |
| 152 | * it doesn't know whether to remember the first or second port. |
| 153 | */ |
| 154 | public ServerSocket createServerSocket(int p) |
| 155 | throws IOException |
| 156 | { |
| 157 | ServerSocket ss; |
| 158 | ss = (new RMIMasterSocketFactory()).createServerSocket(p); |
| 159 | if (p == 0) { |
| 160 | if (servport != 0) { |
| 161 | System.err.println("TEST FAILED: " + |
| 162 | "Duplicate createServerSocket(0)"); |
| 163 | throw new Error("Test aborted (createServerSocket)"); |
| 164 | } |
| 165 | servport = ss.getLocalPort(); |
| 166 | } |
| 167 | return (ss); |
| 168 | } |
| 169 | |
| 170 | /** Return which port was reserved by createServerSocket(0). |
| 171 | * If the return value was 0, createServerSocket(0) wasn't called. |
| 172 | */ |
| 173 | public int whichPort() { |
| 174 | return (servport); |
| 175 | } |
| 176 | } // end class HttpOutFactory |
| 177 | } |