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Diffstat (limited to 'openjdk/java/net/DefaultDatagramSocketImplFactory.java')
| -rw-r--r-- | openjdk/java/net/DefaultDatagramSocketImplFactory.java | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/openjdk/java/net/DefaultDatagramSocketImplFactory.java b/openjdk/java/net/DefaultDatagramSocketImplFactory.java deleted file mode 100644 index 7d4f8edb..00000000 --- a/openjdk/java/net/DefaultDatagramSocketImplFactory.java +++ /dev/null @@ -1,151 +0,0 @@ -/* - * Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved. - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This code is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 only, as - * published by the Free Software Foundation. Oracle designates this - * particular file as subject to the "Classpath" exception as provided - * by Oracle in the LICENSE file that accompanied this code. - * - * This code is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * version 2 for more details (a copy is included in the LICENSE file that - * accompanied this code). - * - * You should have received a copy of the GNU General Public License version - * 2 along with this work; if not, write to the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. - * - * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA - * or visit www.oracle.com if you need additional information or have any - * questions. - */ -package java.net; - -import java.security.AccessController; -import java.security.PrivilegedAction; - -/** - * This class defines a factory for creating DatagramSocketImpls. It defaults - * to creating plain DatagramSocketImpls, but may create other DatagramSocketImpls - * by setting the impl.prefix system property. - * - * For Windows versions lower than Windows Vista a TwoStacksPlainDatagramSocketImpl - * is always created. This impl supports IPv6 on these platform where available. - * - * On Windows platforms greater than Vista that support a dual layer TCP/IP stack - * a DualStackPlainDatagramSocketImpl is created for DatagramSockets. For MulticastSockets - * a TwoStacksPlainDatagramSocketImpl is always created. This is to overcome the lack - * of behavior defined for multicasting over a dual layer socket by the RFC. - * - * @author Chris Hegarty - */ - -class DefaultDatagramSocketImplFactory -{ - static Class prefixImplClass = null; - - /* the windows version. */ - private static float version; - - /* java.net.preferIPv4Stack */ - private static boolean preferIPv4Stack = false; - - /* If the version supports a dual stack TCP implementation */ - private static boolean useDualStackImpl = false; - - /* sun.net.useExclusiveBind */ - private static String exclBindProp; - - /* True if exclusive binding is on for Windows */ - private static boolean exclusiveBind = true; - - - static { - // Determine Windows Version. - java.security.AccessController.doPrivileged( - new PrivilegedAction<Object>() { - public Object run() { - version = 0; - try { - version = Float.parseFloat(System.getProperties() - .getProperty("os.version")); - preferIPv4Stack = Boolean.parseBoolean( - System.getProperties() - .getProperty( - "java.net.preferIPv4Stack")); - exclBindProp = System.getProperty( - "sun.net.useExclusiveBind"); - } catch (NumberFormatException e ) { - assert false : e; - } - return null; // nothing to return - } - }); - - String ipv6 = ikvm.internal.Util.SafeGetEnvironmentVariable("IKVM_IPV6"); - if (ipv6 != null) { - try { - if ((Integer.parseInt(ipv6) & 4) == 0) { - preferIPv4Stack = true; - } else { - useDualStackImpl = true; - } - } catch (NumberFormatException _) { - } - } else if (!InetAddressImplFactory.isIPv6Supported()) { - preferIPv4Stack = true; - } - - // (version >= 6.0) implies Vista or greater. - if (version >= 6.0 && !preferIPv4Stack) { - useDualStackImpl = true; - } - if (exclBindProp != null) { - // sun.net.useExclusiveBind is true - exclusiveBind = exclBindProp.length() == 0 ? true - : Boolean.parseBoolean(exclBindProp); - } else if (version < 6.0) { - exclusiveBind = false; - } - - // impl.prefix - String prefix = null; - try { - prefix = AccessController.doPrivileged( - new sun.security.action.GetPropertyAction("impl.prefix", null)); - if (prefix != null) - prefixImplClass = Class.forName("java.net."+prefix+"DatagramSocketImpl"); - } catch (Exception e) { - System.err.println("Can't find class: java.net." + - prefix + - "DatagramSocketImpl: check impl.prefix property"); - } - } - - /** - * Creates a new <code>DatagramSocketImpl</code> instance. - * - * @param isMulticast true if this impl is to be used for a MutlicastSocket - * @return a new instance of <code>PlainDatagramSocketImpl</code>. - */ - static DatagramSocketImpl createDatagramSocketImpl(boolean isMulticast) - throws SocketException { - if (prefixImplClass != null) { - try { - return (DatagramSocketImpl) prefixImplClass.newInstance(); - } catch (Exception e) { - throw new SocketException("can't instantiate DatagramSocketImpl"); - } - } else { - if (isMulticast) - exclusiveBind = false; - if (useDualStackImpl && !isMulticast) - return new DualStackPlainDatagramSocketImpl(exclusiveBind); - else - return new TwoStacksPlainDatagramSocketImpl(exclusiveBind); - } - } -} |