src/share/classes/sun/nio/ch/SocketAdaptor.java - toolchain/jdk/jdk9_jdk - Git at Google

 /*
  * Copyright (c) 2000, 2008, 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 sun.nio.ch;

 import java.io.*;
 import java.lang.ref.*;
 import java.net.*;
 import java.nio.*;
 import java.nio.channels.*;
 import java.security.AccessController;
 import java.security.PrivilegedExceptionAction;
 import java.util.*;


 // Make a socket channel look like a socket.
 //
 // The only aspects of java.net.Socket-hood that we don't attempt to emulate
 // here are the interrupted-I/O exceptions (which our Solaris implementations
 // attempt to support) and the sending of urgent data.  Otherwise an adapted
 // socket should look enough like a real java.net.Socket to fool most of the
 // developers most of the time, right down to the exception message strings.
 //
 // The methods in this class are defined in exactly the same order as in
 // java.net.Socket so as to simplify tracking future changes to that class.
 //

 public class SocketAdaptor
     extends Socket
 {

     // The channel being adapted
     private final SocketChannelImpl sc;

     // Timeout "option" value for reads
     private volatile int timeout = 0;

     // ## super will create a useless impl
     private SocketAdaptor(SocketChannelImpl sc) {
         this.sc = sc;
     }

     public static Socket create(SocketChannelImpl sc) {
         return new SocketAdaptor(sc);
     }

     public SocketChannel getChannel() {
         return sc;
     }

     // Override this method just to protect against changes in the superclass
     //
     public void connect(SocketAddress remote) throws IOException {
         connect(remote, 0);
     }

     public void connect(SocketAddress remote, int timeout) throws IOException {
         if (remote == null)
             throw new IllegalArgumentException("connect: The address can't be null");
         if (timeout < 0)
             throw new IllegalArgumentException("connect: timeout can't be negative");

         synchronized (sc.blockingLock()) {
             if (!sc.isBlocking())
                 throw new IllegalBlockingModeException();

             try {

                 if (timeout == 0) {
                     sc.connect(remote);
                     return;
                 }

                 // Implement timeout with a selector
                 SelectionKey sk = null;
                 Selector sel = null;
                 sc.configureBlocking(false);
                 try {
                     if (sc.connect(remote))
                         return;
                     sel = Util.getTemporarySelector(sc);
                     sk = sc.register(sel, SelectionKey.OP_CONNECT);
                     long to = timeout;
                     for (;;) {
                         if (!sc.isOpen())
                             throw new ClosedChannelException();
                         long st = System.currentTimeMillis();
                         int ns = sel.select(to);
                         if (ns > 0 &&
                             sk.isConnectable() && sc.finishConnect())
                             break;
                         sel.selectedKeys().remove(sk);
                         to -= System.currentTimeMillis() - st;
                         if (to <= 0) {
                             try {
                                 sc.close();
                             } catch (IOException x) { }
                             throw new SocketTimeoutException();
                         }
                     }
                 } finally {
                     if (sk != null)
                         sk.cancel();
                     if (sc.isOpen())
                         sc.configureBlocking(true);
                     if (sel != null)
                         Util.releaseTemporarySelector(sel);
                 }

             } catch (Exception x) {
                 Net.translateException(x, true);
             }
         }

     }

     public void bind(SocketAddress local) throws IOException {
         try {
             sc.bind(local);
         } catch (Exception x) {
             Net.translateException(x);
         }
     }

     public InetAddress getInetAddress() {
         SocketAddress remote = sc.remoteAddress();
         if (remote == null) {
             return null;
         } else {
             return ((InetSocketAddress)remote).getAddress();
         }
     }

     public InetAddress getLocalAddress() {
         if (sc.isOpen()) {
             SocketAddress local = sc.localAddress();
             if (local != null)
                 return ((InetSocketAddress)local).getAddress();
         }
         return new InetSocketAddress(0).getAddress();
     }

     public int getPort() {
         SocketAddress remote = sc.remoteAddress();
         if (remote == null) {
             return 0;
         } else {
             return ((InetSocketAddress)remote).getPort();
         }
     }

     public int getLocalPort() {
         SocketAddress local = sc.localAddress();
         if (local == null) {
             return -1;
         } else {
             return ((InetSocketAddress)local).getPort();
         }
     }

     private class SocketInputStream
         extends ChannelInputStream
     {
         private SocketInputStream() {
             super(sc);
         }

         protected int read(ByteBuffer bb)
             throws IOException
         {
             synchronized (sc.blockingLock()) {
                 if (!sc.isBlocking())
                     throw new IllegalBlockingModeException();
                 if (timeout == 0)
                     return sc.read(bb);

                 // Implement timeout with a selector
                 SelectionKey sk = null;
                 Selector sel = null;
                 sc.configureBlocking(false);
                 try {
                     int n;
                     if ((n = sc.read(bb)) != 0)
                         return n;
                     sel = Util.getTemporarySelector(sc);
                     sk = sc.register(sel, SelectionKey.OP_READ);
                     long to = timeout;
                     for (;;) {
                         if (!sc.isOpen())
                             throw new ClosedChannelException();
                         long st = System.currentTimeMillis();
                         int ns = sel.select(to);
                         if (ns > 0 && sk.isReadable()) {
                             if ((n = sc.read(bb)) != 0)
                                 return n;
                         }
                         sel.selectedKeys().remove(sk);
                         to -= System.currentTimeMillis() - st;
                         if (to <= 0)
                             throw new SocketTimeoutException();
                     }
                 } finally {
                     if (sk != null)
                         sk.cancel();
                     if (sc.isOpen())
                         sc.configureBlocking(true);
                     if (sel != null)
                         Util.releaseTemporarySelector(sel);
                 }

             }
         }
     }

     private InputStream socketInputStream = null;

     public InputStream getInputStream() throws IOException {
         if (!sc.isOpen())
             throw new SocketException("Socket is closed");
         if (!sc.isConnected())
             throw new SocketException("Socket is not connected");
         if (!sc.isInputOpen())
             throw new SocketException("Socket input is shutdown");
         if (socketInputStream == null) {
             try {
                 socketInputStream = AccessController.doPrivileged(
                     new PrivilegedExceptionAction<InputStream>() {
                         public InputStream run() throws IOException {
                             return new SocketInputStream();
                         }
                     });
             } catch (java.security.PrivilegedActionException e) {
                 throw (IOException)e.getException();
             }
         }
         return socketInputStream;
     }

     public OutputStream getOutputStream() throws IOException {
         if (!sc.isOpen())
             throw new SocketException("Socket is closed");
         if (!sc.isConnected())
             throw new SocketException("Socket is not connected");
         if (!sc.isOutputOpen())
             throw new SocketException("Socket output is shutdown");
         OutputStream os = null;
         try {
             os = AccessController.doPrivileged(
                 new PrivilegedExceptionAction<OutputStream>() {
                     public OutputStream run() throws IOException {
                         return Channels.newOutputStream(sc);
                     }
                 });
         } catch (java.security.PrivilegedActionException e) {
             throw (IOException)e.getException();
         }
         return os;
     }

     private void setBooleanOption(SocketOption<Boolean> name, boolean value)
         throws SocketException
     {
         try {
             sc.setOption(name, value);
         } catch (IOException x) {
             Net.translateToSocketException(x);
         }
     }

     private void setIntOption(SocketOption<Integer> name, int value)
         throws SocketException
     {
         try {
             sc.setOption(name, value);
         } catch (IOException x) {
             Net.translateToSocketException(x);
         }
     }

     private boolean getBooleanOption(SocketOption<Boolean> name) throws SocketException {
         try {
             return sc.getOption(name).booleanValue();
         } catch (IOException x) {
             Net.translateToSocketException(x);
             return false;       // keep compiler happy
         }
     }

     private int getIntOption(SocketOption<Integer> name) throws SocketException {
         try {
             return sc.getOption(name).intValue();
         } catch (IOException x) {
             Net.translateToSocketException(x);
             return -1;          // keep compiler happy
         }
     }

     public void setTcpNoDelay(boolean on) throws SocketException {
         setBooleanOption(StandardSocketOption.TCP_NODELAY, on);
     }

     public boolean getTcpNoDelay() throws SocketException {
         return getBooleanOption(StandardSocketOption.TCP_NODELAY);
     }

     public void setSoLinger(boolean on, int linger) throws SocketException {
         if (!on)
             linger = -1;
         setIntOption(StandardSocketOption.SO_LINGER, linger);
     }

     public int getSoLinger() throws SocketException {
         return getIntOption(StandardSocketOption.SO_LINGER);
     }

     public void sendUrgentData(int data) throws IOException {
         throw new SocketException("Urgent data not supported");
     }

     public void setOOBInline(boolean on) throws SocketException {
         setBooleanOption(ExtendedSocketOption.SO_OOBINLINE, on);
     }

     public boolean getOOBInline() throws SocketException {
         return getBooleanOption(ExtendedSocketOption.SO_OOBINLINE);
     }

     public void setSoTimeout(int timeout) throws SocketException {
         if (timeout < 0)
             throw new IllegalArgumentException("timeout can't be negative");
         this.timeout = timeout;
     }

     public int getSoTimeout() throws SocketException {
         return timeout;
     }

     public void setSendBufferSize(int size) throws SocketException {
         // size 0 valid for SocketChannel, invalid for Socket
         if (size <= 0)
             throw new IllegalArgumentException("Invalid send size");
         setIntOption(StandardSocketOption.SO_SNDBUF, size);
     }

     public int getSendBufferSize() throws SocketException {
         return getIntOption(StandardSocketOption.SO_SNDBUF);
     }

     public void setReceiveBufferSize(int size) throws SocketException {
         // size 0 valid for SocketChannel, invalid for Socket
         if (size <= 0)
             throw new IllegalArgumentException("Invalid receive size");
         setIntOption(StandardSocketOption.SO_RCVBUF, size);
     }

     public int getReceiveBufferSize() throws SocketException {
         return getIntOption(StandardSocketOption.SO_RCVBUF);
     }

     public void setKeepAlive(boolean on) throws SocketException {
         setBooleanOption(StandardSocketOption.SO_KEEPALIVE, on);
     }

     public boolean getKeepAlive() throws SocketException {
         return getBooleanOption(StandardSocketOption.SO_KEEPALIVE);
     }

     public void setTrafficClass(int tc) throws SocketException {
         setIntOption(StandardSocketOption.IP_TOS, tc);
     }

     public int getTrafficClass() throws SocketException {
         return getIntOption(StandardSocketOption.IP_TOS);
     }

     public void setReuseAddress(boolean on) throws SocketException {
         setBooleanOption(StandardSocketOption.SO_REUSEADDR, on);
     }

     public boolean getReuseAddress() throws SocketException {
         return getBooleanOption(StandardSocketOption.SO_REUSEADDR);
     }

     public void close() throws IOException {
         try {
             sc.close();
         } catch (Exception x) {
             Net.translateToSocketException(x);
         }
     }

     public void shutdownInput() throws IOException {
         try {
             sc.shutdownInput();
         } catch (Exception x) {
             Net.translateException(x);
         }
     }

     public void shutdownOutput() throws IOException {
         try {
             sc.shutdownOutput();
         } catch (Exception x) {
             Net.translateException(x);
         }
     }

     public String toString() {
         if (sc.isConnected())
             return "Socket[addr=" + getInetAddress() +
                 ",port=" + getPort() +
                 ",localport=" + getLocalPort() + "]";
         return "Socket[unconnected]";
     }

     public boolean isConnected() {
         return sc.isConnected();
     }

     public boolean isBound() {
         return sc.localAddress() != null;
     }

     public boolean isClosed() {
         return !sc.isOpen();
     }

     public boolean isInputShutdown() {
         return !sc.isInputOpen();
     }

     public boolean isOutputShutdown() {
         return !sc.isOutputOpen();
     }

 }
	/*
	* Copyright (c) 2000, 2008, 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 sun.nio.ch;

	import java.io.*;
	import java.lang.ref.*;
	import java.net.*;
	import java.nio.*;
	import java.nio.channels.*;
	import java.security.AccessController;
	import java.security.PrivilegedExceptionAction;
	import java.util.*;


	// Make a socket channel look like a socket.
	//
	// The only aspects of java.net.Socket-hood that we don't attempt to emulate
	// here are the interrupted-I/O exceptions (which our Solaris implementations
	// attempt to support) and the sending of urgent data. Otherwise an adapted
	// socket should look enough like a real java.net.Socket to fool most of the
	// developers most of the time, right down to the exception message strings.
	//
	// The methods in this class are defined in exactly the same order as in
	// java.net.Socket so as to simplify tracking future changes to that class.
	//

	public class SocketAdaptor
	extends Socket
	{

	// The channel being adapted
	private final SocketChannelImpl sc;

	// Timeout "option" value for reads
	private volatile int timeout = 0;

	// ## super will create a useless impl
	private SocketAdaptor(SocketChannelImpl sc) {
	this.sc = sc;
	}

	public static Socket create(SocketChannelImpl sc) {
	return new SocketAdaptor(sc);
	}

	public SocketChannel getChannel() {
	return sc;
	}

	// Override this method just to protect against changes in the superclass
	//
	public void connect(SocketAddress remote) throws IOException {
	connect(remote, 0);
	}

	public void connect(SocketAddress remote, int timeout) throws IOException {
	if (remote == null)
	throw new IllegalArgumentException("connect: The address can't be null");
	if (timeout < 0)
	throw new IllegalArgumentException("connect: timeout can't be negative");

	synchronized (sc.blockingLock()) {
	if (!sc.isBlocking())
	throw new IllegalBlockingModeException();

	try {

	if (timeout == 0) {
	sc.connect(remote);
	return;
	}

	// Implement timeout with a selector
	SelectionKey sk = null;
	Selector sel = null;
	sc.configureBlocking(false);
	try {
	if (sc.connect(remote))
	return;
	sel = Util.getTemporarySelector(sc);
	sk = sc.register(sel, SelectionKey.OP_CONNECT);
	long to = timeout;
	for (;;) {
	if (!sc.isOpen())
	throw new ClosedChannelException();
	long st = System.currentTimeMillis();
	int ns = sel.select(to);
	if (ns > 0 &&
	sk.isConnectable() && sc.finishConnect())
	break;
	sel.selectedKeys().remove(sk);
	to -= System.currentTimeMillis() - st;
	if (to <= 0) {
	try {
	sc.close();
	} catch (IOException x) { }
	throw new SocketTimeoutException();
	}
	}
	} finally {
	if (sk != null)
	sk.cancel();
	if (sc.isOpen())
	sc.configureBlocking(true);
	if (sel != null)
	Util.releaseTemporarySelector(sel);
	}

	} catch (Exception x) {
	Net.translateException(x, true);
	}
	}

	}

	public void bind(SocketAddress local) throws IOException {
	try {
	sc.bind(local);
	} catch (Exception x) {
	Net.translateException(x);
	}
	}

	public InetAddress getInetAddress() {
	SocketAddress remote = sc.remoteAddress();
	if (remote == null) {
	return null;
	} else {
	return ((InetSocketAddress)remote).getAddress();
	}
	}

	public InetAddress getLocalAddress() {
	if (sc.isOpen()) {
	SocketAddress local = sc.localAddress();
	if (local != null)
	return ((InetSocketAddress)local).getAddress();
	}
	return new InetSocketAddress(0).getAddress();
	}

	public int getPort() {
	SocketAddress remote = sc.remoteAddress();
	if (remote == null) {
	return 0;
	} else {
	return ((InetSocketAddress)remote).getPort();
	}
	}

	public int getLocalPort() {
	SocketAddress local = sc.localAddress();
	if (local == null) {
	return -1;
	} else {
	return ((InetSocketAddress)local).getPort();
	}
	}

	private class SocketInputStream
	extends ChannelInputStream
	{
	private SocketInputStream() {
	super(sc);
	}

	protected int read(ByteBuffer bb)
	throws IOException
	{
	synchronized (sc.blockingLock()) {
	if (!sc.isBlocking())
	throw new IllegalBlockingModeException();
	if (timeout == 0)
	return sc.read(bb);

	// Implement timeout with a selector
	SelectionKey sk = null;
	Selector sel = null;
	sc.configureBlocking(false);
	try {
	int n;
	if ((n = sc.read(bb)) != 0)
	return n;
	sel = Util.getTemporarySelector(sc);
	sk = sc.register(sel, SelectionKey.OP_READ);
	long to = timeout;
	for (;;) {
	if (!sc.isOpen())
	throw new ClosedChannelException();
	long st = System.currentTimeMillis();
	int ns = sel.select(to);
	if (ns > 0 && sk.isReadable()) {
	if ((n = sc.read(bb)) != 0)
	return n;
	}
	sel.selectedKeys().remove(sk);
	to -= System.currentTimeMillis() - st;
	if (to <= 0)
	throw new SocketTimeoutException();
	}
	} finally {
	if (sk != null)
	sk.cancel();
	if (sc.isOpen())
	sc.configureBlocking(true);
	if (sel != null)
	Util.releaseTemporarySelector(sel);
	}

	}
	}
	}

	private InputStream socketInputStream = null;

	public InputStream getInputStream() throws IOException {
	if (!sc.isOpen())
	throw new SocketException("Socket is closed");
	if (!sc.isConnected())
	throw new SocketException("Socket is not connected");
	if (!sc.isInputOpen())
	throw new SocketException("Socket input is shutdown");
	if (socketInputStream == null) {
	try {
	socketInputStream = AccessController.doPrivileged(
	new PrivilegedExceptionAction<InputStream>() {
	public InputStream run() throws IOException {
	return new SocketInputStream();
	}
	});
	} catch (java.security.PrivilegedActionException e) {
	throw (IOException)e.getException();
	}
	}
	return socketInputStream;
	}

	public OutputStream getOutputStream() throws IOException {
	if (!sc.isOpen())
	throw new SocketException("Socket is closed");
	if (!sc.isConnected())
	throw new SocketException("Socket is not connected");
	if (!sc.isOutputOpen())
	throw new SocketException("Socket output is shutdown");
	OutputStream os = null;
	try {
	os = AccessController.doPrivileged(
	new PrivilegedExceptionAction<OutputStream>() {
	public OutputStream run() throws IOException {
	return Channels.newOutputStream(sc);
	}
	});
	} catch (java.security.PrivilegedActionException e) {
	throw (IOException)e.getException();
	}
	return os;
	}

	private void setBooleanOption(SocketOption<Boolean> name, boolean value)
	throws SocketException
	{
	try {
	sc.setOption(name, value);
	} catch (IOException x) {
	Net.translateToSocketException(x);
	}
	}

	private void setIntOption(SocketOption<Integer> name, int value)
	throws SocketException
	{
	try {
	sc.setOption(name, value);
	} catch (IOException x) {
	Net.translateToSocketException(x);
	}
	}

	private boolean getBooleanOption(SocketOption<Boolean> name) throws SocketException {
	try {
	return sc.getOption(name).booleanValue();
	} catch (IOException x) {
	Net.translateToSocketException(x);
	return false; // keep compiler happy
	}
	}

	private int getIntOption(SocketOption<Integer> name) throws SocketException {
	try {
	return sc.getOption(name).intValue();
	} catch (IOException x) {
	Net.translateToSocketException(x);
	return -1; // keep compiler happy
	}
	}

	public void setTcpNoDelay(boolean on) throws SocketException {
	setBooleanOption(StandardSocketOption.TCP_NODELAY, on);
	}

	public boolean getTcpNoDelay() throws SocketException {
	return getBooleanOption(StandardSocketOption.TCP_NODELAY);
	}

	public void setSoLinger(boolean on, int linger) throws SocketException {
	if (!on)
	linger = -1;
	setIntOption(StandardSocketOption.SO_LINGER, linger);
	}

	public int getSoLinger() throws SocketException {
	return getIntOption(StandardSocketOption.SO_LINGER);
	}

	public void sendUrgentData(int data) throws IOException {
	throw new SocketException("Urgent data not supported");
	}

	public void setOOBInline(boolean on) throws SocketException {
	setBooleanOption(ExtendedSocketOption.SO_OOBINLINE, on);
	}

	public boolean getOOBInline() throws SocketException {
	return getBooleanOption(ExtendedSocketOption.SO_OOBINLINE);
	}

	public void setSoTimeout(int timeout) throws SocketException {
	if (timeout < 0)
	throw new IllegalArgumentException("timeout can't be negative");
	this.timeout = timeout;
	}

	public int getSoTimeout() throws SocketException {
	return timeout;
	}

	public void setSendBufferSize(int size) throws SocketException {
	// size 0 valid for SocketChannel, invalid for Socket
	if (size <= 0)
	throw new IllegalArgumentException("Invalid send size");
	setIntOption(StandardSocketOption.SO_SNDBUF, size);
	}

	public int getSendBufferSize() throws SocketException {
	return getIntOption(StandardSocketOption.SO_SNDBUF);
	}

	public void setReceiveBufferSize(int size) throws SocketException {
	// size 0 valid for SocketChannel, invalid for Socket
	if (size <= 0)
	throw new IllegalArgumentException("Invalid receive size");
	setIntOption(StandardSocketOption.SO_RCVBUF, size);
	}

	public int getReceiveBufferSize() throws SocketException {
	return getIntOption(StandardSocketOption.SO_RCVBUF);
	}

	public void setKeepAlive(boolean on) throws SocketException {
	setBooleanOption(StandardSocketOption.SO_KEEPALIVE, on);
	}

	public boolean getKeepAlive() throws SocketException {
	return getBooleanOption(StandardSocketOption.SO_KEEPALIVE);
	}

	public void setTrafficClass(int tc) throws SocketException {
	setIntOption(StandardSocketOption.IP_TOS, tc);
	}

	public int getTrafficClass() throws SocketException {
	return getIntOption(StandardSocketOption.IP_TOS);
	}

	public void setReuseAddress(boolean on) throws SocketException {
	setBooleanOption(StandardSocketOption.SO_REUSEADDR, on);
	}

	public boolean getReuseAddress() throws SocketException {
	return getBooleanOption(StandardSocketOption.SO_REUSEADDR);
	}

	public void close() throws IOException {
	try {
	sc.close();
	} catch (Exception x) {
	Net.translateToSocketException(x);
	}
	}

	public void shutdownInput() throws IOException {
	try {
	sc.shutdownInput();
	} catch (Exception x) {
	Net.translateException(x);
	}
	}

	public void shutdownOutput() throws IOException {
	try {
	sc.shutdownOutput();
	} catch (Exception x) {
	Net.translateException(x);
	}
	}

	public String toString() {
	if (sc.isConnected())
	return "Socket[addr=" + getInetAddress() +
	",port=" + getPort() +
	",localport=" + getLocalPort() + "]";
	return "Socket[unconnected]";
	}

	public boolean isConnected() {
	return sc.isConnected();
	}

	public boolean isBound() {
	return sc.localAddress() != null;
	}

	public boolean isClosed() {
	return !sc.isOpen();
	}

	public boolean isInputShutdown() {
	return !sc.isInputOpen();
	}

	public boolean isOutputShutdown() {
	return !sc.isOutputOpen();
	}

	}