--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/windows/classes/java/net/TwoStacksPlainSocketImpl.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,206 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. 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. Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+package java.net;
+
+import java.io.IOException;
+import java.io.FileDescriptor;
+
+/*
+ * This class defines the plain SocketImpl that is used for all
+ * Windows version 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 TwoStacksPlainSocketImpl extends AbstractPlainSocketImpl
+{
+ /* second fd, used for ipv6 on windows only.
+ * fd1 is used for listeners and for client sockets at initialization
+ * until the socket is connected. Up to this point fd always refers
+ * to the ipv4 socket and fd1 to the ipv6 socket. After the socket
+ * becomes connected, fd always refers to the connected socket
+ * (either v4 or v6) and fd1 is closed.
+ *
+ * For ServerSockets, fd always refers to the v4 listener and
+ * fd1 the v6 listener.
+ */
+ private FileDescriptor fd1;
+
+ /*
+ * Needed for ipv6 on windows because we need to know
+ * if the socket is bound to ::0 or 0.0.0.0, when a caller
+ * asks for it. Otherwise we don't know which socket to ask.
+ */
+ private InetAddress anyLocalBoundAddr = null;
+
+ /* to prevent starvation when listening on two sockets, this is
+ * is used to hold the id of the last socket we accepted on.
+ */
+ private int lastfd = -1;
+
+ static {
+ initProto();
+ }
+
+ public TwoStacksPlainSocketImpl() {}
+
+ public TwoStacksPlainSocketImpl(FileDescriptor fd) {
+ this.fd = fd;
+ }
+
+ /**
+ * Creates a socket with a boolean that specifies whether this
+ * is a stream socket (true) or an unconnected UDP socket (false).
+ */
+ protected synchronized void create(boolean stream) throws IOException {
+ fd1 = new FileDescriptor();
+ super.create(stream);
+ }
+
+ /**
+ * Binds the socket to the specified address of the specified local port.
+ * @param address the address
+ * @param port the port
+ */
+ protected synchronized void bind(InetAddress address, int lport)
+ throws IOException
+ {
+ super.bind(address, lport);
+ if (address.isAnyLocalAddress()) {
+ anyLocalBoundAddr = address;
+ }
+ }
+
+ public Object getOption(int opt) throws SocketException {
+ if (isClosedOrPending()) {
+ throw new SocketException("Socket Closed");
+ }
+ if (opt == SO_BINDADDR) {
+ if (fd != null && fd1 != null ) {
+ /* must be unbound or else bound to anyLocal */
+ return anyLocalBoundAddr;
+ }
+ InetAddressContainer in = new InetAddressContainer();
+ socketGetOption(opt, in);
+ return in.addr;
+ } else
+ return super.getOption(opt);
+ }
+
+ /**
+ * Closes the socket.
+ */
+ protected void close() throws IOException {
+ synchronized(fdLock) {
+ if (fd != null || fd1 != null) {
+ if (fdUseCount == 0) {
+ if (closePending) {
+ return;
+ }
+ closePending = true;
+ socketClose();
+ fd = null;
+ fd1 = null;
+ return;
+ } else {
+ /*
+ * If a thread has acquired the fd and a close
+ * isn't pending then use a deferred close.
+ * Also decrement fdUseCount to signal the last
+ * thread that releases the fd to close it.
+ */
+ if (!closePending) {
+ closePending = true;
+ fdUseCount--;
+ socketClose();
+ }
+ }
+ }
+ }
+ }
+
+ void reset() throws IOException {
+ if (fd != null || fd1 != null) {
+ socketClose();
+ }
+ fd = null;
+ fd1 = null;
+ super.reset();
+ }
+
+ /*
+ * Return true if already closed or close is pending
+ */
+ public boolean isClosedOrPending() {
+ /*
+ * Lock on fdLock to ensure that we wait if a
+ * close is in progress.
+ */
+ synchronized (fdLock) {
+ if (closePending || (fd == null && fd1 == null)) {
+ return true;
+ } else {
+ return false;
+ }
+ }
+ }
+
+ /* Native methods */
+
+ static native void initProto();
+
+ native void socketCreate(boolean isServer) throws IOException;
+
+ native void socketConnect(InetAddress address, int port, int timeout)
+ throws IOException;
+
+ native void socketBind(InetAddress address, int port)
+ throws IOException;
+
+ native void socketListen(int count) throws IOException;
+
+ native void socketAccept(SocketImpl s) throws IOException;
+
+ native int socketAvailable() throws IOException;
+
+ native void socketClose0(boolean useDeferredClose) throws IOException;
+
+ native void socketShutdown(int howto) throws IOException;
+
+ native void socketSetOption(int cmd, boolean on, Object value)
+ throws SocketException;
+
+ native int socketGetOption(int opt, Object iaContainerObj) throws SocketException;
+
+ native int socketGetOption1(int opt, Object iaContainerObj, FileDescriptor fd)
+ throws SocketException;
+
+ native void socketSendUrgentData(int data) throws IOException;
+}