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.net.SocketAddress; 32 import java.security.AccessController; 33 import java.security.PrivilegedAction; 34 35 import sun.security.util.SecurityProperties; 36 37 public final class SocketExceptions { 38 private SocketExceptions() {} 39 40 private static final boolean enhancedExceptionText = 41 SecurityProperties.includedInExceptions("hostInfo"); 42 43 /** 44 * Utility which takes an exception and returns either the same exception 45 * or a new exception of the same type with the same stack trace 46 * and detail message enhanced with addressing information from the 47 * given InetSocketAddress. 48 * 49 * If the system/security property "jdk.includeInExceptions" is not 50 * set or does not contain the category hostInfo, 51 * then the original exception is returned. 52 * 53 * Only specific IOException subtypes are supported. 54 */ 55 public static IOException of(IOException e, SocketAddress address) { 56 if (!enhancedExceptionText || address == null) 57 return e; 58 StringBuilder sb = new StringBuilder(); 59 sb.append(e.getMessage()); 60 sb.append(": "); 61 if (address instanceof InetSocketAddress) { 62 int port = ((InetSocketAddress) address).getPort(); 63 String host = ((InetSocketAddress) address).getHostString(); 64 sb.append(host); 65 sb.append(':'); 66 sb.append(Integer.toString(port)); 67 } else { 68 sb.append(address); 69 } 70 String enhancedMsg = sb.toString(); 71 return create(e, enhancedMsg); 72 } 73 74 // return a new instance of the same type with the given detail 75 // msg, or if the type doesn't support detail msgs, return given 76 // instance. 77 78 private static IOException create(IOException e, String msg) { 79 return AccessController.doPrivileged(new PrivilegedAction<IOException>() { 80 public IOException run() { 81 try { 82 Class<?> clazz = e.getClass(); 83 Constructor<?> ctor = clazz.getConstructor(String.class); 84 IOException e1 = (IOException)(ctor.newInstance(msg)); 85 e1.setStackTrace(e.getStackTrace()); 86 return e1; 87 } catch (Exception e0) { 88 // Some eg AsynchronousCloseException have no detail msg 89 return e; 90 } 91 } 92 }); 93 } 94 }