--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/windows/classes/java/net/TwoStacksPlainDatagramSocketImpl.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,222 @@
+/*
+ * Copyright (c) 2007, 2016, 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.io.IOException;
+import java.io.FileDescriptor;
+import sun.net.ResourceManager;
+
+/**
+ * This class defines the plain DatagramSocketImpl that is used for all
+ * Windows versions lower than Vista. It adds support for IPv6 on
+ * these platforms where available.
+ *
+ * For backward compatibility windows platforms that do not have IPv6
+ * support also use this implementation, and fd1 gets set to null
+ * during socket creation.
+ *
+ * @author Chris Hegarty
+ */
+
+class TwoStacksPlainDatagramSocketImpl extends AbstractPlainDatagramSocketImpl
+{
+ /* Used for IPv6 on Windows only */
+ private FileDescriptor fd1;
+
+ /*
+ * Needed for ipv6 on windows because we need to know
+ * if the socket was bound to ::0 or 0.0.0.0, when a caller
+ * asks for it. In this case, both sockets are used, but we
+ * don't know whether the caller requested ::0 or 0.0.0.0
+ * and need to remember it here.
+ */
+ private InetAddress anyLocalBoundAddr=null;
+
+ private int fduse=-1; /* saved between peek() and receive() calls */
+
+ /* saved between successive calls to receive, if data is detected
+ * on both sockets at same time. To ensure that one socket is not
+ * starved, they rotate using this field
+ */
+ private int lastfd=-1;
+
+ static {
+ init();
+ }
+
+ // true if this socket is exclusively bound
+ private final boolean exclusiveBind;
+
+ /*
+ * Set to true if SO_REUSEADDR is set after the socket is bound to
+ * indicate SO_REUSEADDR is being emulated
+ */
+ private boolean reuseAddressEmulated;
+
+ // emulates SO_REUSEADDR when exclusiveBind is true and socket is bound
+ private boolean isReuseAddress;
+
+ TwoStacksPlainDatagramSocketImpl(boolean exclBind) {
+ exclusiveBind = exclBind;
+ }
+
+ protected synchronized void create() throws SocketException {
+ fd1 = new FileDescriptor();
+ try {
+ super.create();
+ } catch (SocketException e) {
+ fd1 = null;
+ throw e;
+ }
+ }
+
+ protected synchronized void bind(int lport, InetAddress laddr)
+ throws SocketException {
+ super.bind(lport, laddr);
+ if (laddr.isAnyLocalAddress()) {
+ anyLocalBoundAddr = laddr;
+ }
+ }
+
+ @Override
+ protected synchronized void bind0(int lport, InetAddress laddr)
+ throws SocketException
+ {
+ bind0(lport, laddr, exclusiveBind);
+
+ }
+
+ protected synchronized void receive(DatagramPacket p)
+ throws IOException {
+ try {
+ receive0(p);
+ } finally {
+ fduse = -1;
+ }
+ }
+
+ public Object getOption(int optID) throws SocketException {
+ if (isClosed()) {
+ throw new SocketException("Socket Closed");
+ }
+
+ if (optID == SO_BINDADDR) {
+ if ((fd != null && fd1 != null) && !connected) {
+ return anyLocalBoundAddr;
+ }
+ int family = connectedAddress == null ? -1 : connectedAddress.holder().getFamily();
+ return socketLocalAddress(family);
+ } else if (optID == SO_REUSEADDR && reuseAddressEmulated) {
+ return isReuseAddress;
+ } else if (optID == SO_REUSEPORT) {
+ // SO_REUSEPORT is not supported on Windows.
+ throw new UnsupportedOperationException("unsupported option");
+ } else {
+ return super.getOption(optID);
+ }
+ }
+
+ protected void socketSetOption(int opt, Object val)
+ throws SocketException
+ {
+ if (opt == SO_REUSEADDR && exclusiveBind && localPort != 0) {
+ // socket already bound, emulate
+ reuseAddressEmulated = true;
+ isReuseAddress = (Boolean)val;
+ } else if (opt == SO_REUSEPORT) {
+ // SO_REUSEPORT is not supported on Windows.
+ throw new UnsupportedOperationException("unsupported option");
+ } else {
+ socketNativeSetOption(opt, val);
+ }
+
+ }
+
+ protected boolean isClosed() {
+ return (fd == null && fd1 == null) ? true : false;
+ }
+
+ protected void close() {
+ if (fd != null || fd1 != null) {
+ datagramSocketClose();
+ ResourceManager.afterUdpClose();
+ fd = null;
+ fd1 = null;
+ }
+ }
+
+ /* Native methods */
+
+ protected synchronized native void bind0(int lport, InetAddress laddr,
+ boolean exclBind)
+ throws SocketException;
+
+ protected native void send(DatagramPacket p) throws IOException;
+
+ protected synchronized native int peek(InetAddress i) throws IOException;
+
+ protected synchronized native int peekData(DatagramPacket p) throws IOException;
+
+ protected synchronized native void receive0(DatagramPacket p)
+ throws IOException;
+
+ protected native void setTimeToLive(int ttl) throws IOException;
+
+ protected native int getTimeToLive() throws IOException;
+
+ @Deprecated
+ protected native void setTTL(byte ttl) throws IOException;
+
+ @Deprecated
+ protected native byte getTTL() throws IOException;
+
+ protected native void join(InetAddress inetaddr, NetworkInterface netIf)
+ throws IOException;
+
+ protected native void leave(InetAddress inetaddr, NetworkInterface netIf)
+ throws IOException;
+
+ protected native void datagramSocketCreate() throws SocketException;
+
+ protected native void datagramSocketClose();
+
+ protected native void socketNativeSetOption(int opt, Object val)
+ throws SocketException;
+
+ protected native Object socketGetOption(int opt) throws SocketException;
+
+ protected native void connect0(InetAddress address, int port) throws SocketException;
+
+ protected native Object socketLocalAddress(int family) throws SocketException;
+
+ protected native void disconnect0(int family);
+
+ native int dataAvailable();
+
+ /**
+ * Perform class load-time initializations.
+ */
+ private static native void init();
+}