1 /* 2 * Copyright (c) 2018, 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 23 * questions. 24 */ 25 26 package sun.net.util; 27 28 import java.io.IOException; 29 import java.lang.reflect.Constructor; 30 import java.net.InetSocketAddress; 31 import java.security.AccessController; 32 import java.security.PrivilegedAction; 33 34 import sun.security.util.SecurityProperties; 35 36 public final class SocketExceptions { 37 private SocketExceptions() {} 38 39 private static final boolean enhancedExceptionText = 40 SecurityProperties.includedInExceptions("hostInfo"); 41 42 /** 43 * Utility which takes an exception and returns either the same exception 44 * or a new exception of the same type with the same stack trace 45 * and detail message enhanced with addressing information from the 46 * given InetSocketAddress. 47 * 48 * If the system/security property "jdk.includeInExceptions" is not 49 * set or does not contain the category hostInfo, 50 * then the original exception is returned. 51 * 52 * Only specific IOException subtypes are supported. 53 */ 54 public static IOException of(IOException e, InetSocketAddress address) { 55 if (!enhancedExceptionText || address == null) 56 return e; 57 int port = address.getPort(); 58 String host = address.getHostString(); 59 StringBuilder sb = new StringBuilder(); 60 sb.append(e.getMessage()); 61 sb.append(": "); 62 sb.append(host); 63 sb.append(':'); 64 sb.append(Integer.toString(port)); 65 String enhancedMsg = sb.toString(); 66 return create(e, enhancedMsg); 67 } 68 69 // return a new instance of the same type with the given detail 70 // msg, or if the type doesn't support detail msgs, return given 71 // instance. 72 73 private static IOException create(IOException e, String msg) { 74 return AccessController.doPrivileged(new PrivilegedAction<IOException>() { 75 public IOException run() { 76 try { 77 Class<?> clazz = e.getClass(); 78 Constructor<?> ctor = clazz.getConstructor(String.class); 79 IOException e1 = (IOException)(ctor.newInstance(msg)); 80 e1.setStackTrace(e.getStackTrace()); 81 return e1; 82 } catch (Exception e0) { 83 // Some eg AsynchronousCloseException have no detail msg 84 return e; 85 } 86 } 87 }); 88 } 89 }