Prepare for forking.

1 files changed, 206 insertions, 0 deletions

diff --git a/openjdk/java/net/TwoStacksPlainSocketImpl.java b/openjdk/java/net/TwoStacksPlainSocketImpl.java
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+/*
+ * 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;
+}