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+/* PlainDatagramSocketImpl.java -- Default DatagramSocket implementation
+ Copyright (C) 1998, 1999, 2001, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.java.net;
+
+import gnu.java.nio.VMChannel;
+
+import java.io.IOException;
+import java.io.InterruptedIOException;
+import java.net.DatagramPacket;
+import java.net.DatagramSocketImpl;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.NetworkInterface;
+import java.net.SocketAddress;
+import java.net.SocketException;
+import java.net.SocketTimeoutException;
+import java.nio.ByteBuffer;
+
+/**
+ * Written using on-line Java Platform 1.2 API Specification, as well
+ * as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998).
+ * Status: Believed complete and correct.
+ */
+
+/**
+ * This is the default socket implementation for datagram sockets.
+ * It makes native calls to C routines that implement BSD style
+ * SOCK_DGRAM sockets in the AF_INET family.
+ *
+ * @author Aaron M. Renn (arenn@urbanophile.com)
+ * @author Warren Levy (warrenl@cygnus.com)
+ */
+public final class PlainDatagramSocketImpl extends DatagramSocketImpl
+{
+ private final VMChannel channel;
+
+ /**
+ * The platform-specific socket implementation.
+ */
+ private final VMPlainSocketImpl impl;
+
+ /**
+ * Lock object to serialize threads wanting to receive
+ */
+ private final Object RECEIVE_LOCK = new Object();
+
+ /**
+ * Lock object to serialize threads wanting to send
+ */
+ private final Object SEND_LOCK = new Object();
+
+ /**
+ * Default do nothing constructor
+ */
+ public PlainDatagramSocketImpl() throws IOException
+ {
+ channel = new VMChannel();
+ impl = new VMPlainSocketImpl(channel);
+ }
+
+ /*protected void finalize() throws Throwable
+ {
+ synchronized (this)
+ {
+ if (channel.getState().isValid())
+ close();
+ }
+ super.finalize();
+ }*/
+
+ /*public int getNativeFD()
+ {
+ return native_fd;
+ }*/
+
+ /**
+ * Binds this socket to a particular port and interface
+ *
+ * @param port The port to bind to
+ * @param addr The address to bind to
+ *
+ * @exception SocketException If an error occurs
+ */
+ protected synchronized void bind(int port, InetAddress addr)
+ throws SocketException
+ {
+ try
+ {
+ impl.bind(new InetSocketAddress(addr, port));
+ }
+ catch (SocketException se)
+ {
+ throw se;
+ }
+ catch (IOException ioe)
+ {
+ SocketException se = new SocketException();
+ se.initCause(ioe);
+ throw se;
+ }
+ }
+
+ /**
+ * Creates a new datagram socket
+ *
+ * @exception SocketException If an error occurs
+ */
+ protected synchronized void create() throws SocketException
+ {
+ try
+ {
+ channel.initSocket(false);
+ }
+ catch (SocketException se)
+ {
+ throw se;
+ }
+ catch (IOException ioe)
+ {
+ SocketException se = new SocketException();
+ se.initCause(ioe);
+ throw se;
+ }
+ }
+
+ /**
+ * Connects to the remote address and port specified as arguments.
+ *
+ * @param addr The remote address to connect to
+ * @param port The remote port to connect to
+ *
+ * @exception SocketException If an error occurs
+ */
+ protected void connect(InetAddress addr, int port) throws SocketException
+ {
+ channel.connect(new InetSocketAddress(addr, port), 0);
+ }
+
+ /**
+ * Disconnects the socket.
+ *
+ * @since 1.4
+ */
+ protected void disconnect()
+ {
+ synchronized (this)
+ {
+ try
+ {
+ if (channel.getState().isValid())
+ channel.disconnect();
+ }
+ catch (IOException ioe)
+ {
+ }
+ }
+ }
+
+ /**
+ * Sets the Time to Live value for the socket
+ *
+ * @param ttl The new TTL value
+ *
+ * @exception IOException If an error occurs
+ */
+ protected synchronized void setTimeToLive(int ttl) throws IOException
+ {
+ impl.setTimeToLive(ttl);
+ }
+
+ /**
+ * Gets the Time to Live value for the socket
+ *
+ * @return The TTL value
+ *
+ * @exception IOException If an error occurs
+ */
+ protected synchronized int getTimeToLive() throws IOException
+ {
+ return impl.getTimeToLive();
+ }
+
+ protected int getLocalPort()
+ {
+ if (channel == null)
+ return -1;
+
+ try
+ {
+ InetSocketAddress local = channel.getLocalAddress();
+ if (local == null)
+ return -1;
+ return local.getPort();
+ }
+ catch (IOException ioe)
+ {
+ return -1;
+ }
+ }
+
+ /**
+ * Sends a packet of data to a remote host
+ *
+ * @param packet The packet to send
+ *
+ * @exception IOException If an error occurs
+ */
+ protected void send(DatagramPacket packet) throws IOException
+ {
+ synchronized (SEND_LOCK)
+ {
+ ByteBuffer buf = ByteBuffer.wrap(packet.getData(),
+ packet.getOffset(),
+ packet.getLength());
+ InetAddress remote = packet.getAddress();
+ int port = packet.getPort();
+ if (remote == null)
+ throw new NullPointerException();
+ if (port <= 0)
+ throw new SocketException("invalid port " + port);
+ while (true)
+ {
+ try
+ {
+ channel.send(buf, new InetSocketAddress(remote, port));
+ break;
+ }
+ catch (InterruptedIOException ioe)
+ {
+ // Ignore; interrupted system call.
+ }
+ }
+ }
+ }
+
+ /**
+ * Receives a UDP packet from the network
+ *
+ * @param packet The packet to fill in with the data received
+ *
+ * @exception IOException IOException If an error occurs
+ */
+ protected void receive(DatagramPacket packet)
+ throws IOException
+ {
+ synchronized(RECEIVE_LOCK)
+ {
+ ByteBuffer buf = ByteBuffer.wrap(packet.getData(),
+ packet.getOffset(),
+ packet.getLength());
+ SocketAddress addr = null;
+ while (true)
+ {
+ try
+ {
+ addr = channel.receive(buf);
+ break;
+ }
+ catch (SocketTimeoutException ste)
+ {
+ throw ste;
+ }
+ catch (InterruptedIOException iioe)
+ {
+ // Ignore. Loop.
+ }
+ }
+ if (addr != null)
+ packet.setSocketAddress(addr);
+ packet.setLength(buf.position() - packet.getOffset());
+ }
+ }
+
+
+ /**
+ * Sets the value of an option on the socket
+ *
+ * @param optionId The identifier of the option to set
+ * @param value The value of the option to set
+ *
+ * @exception SocketException If an error occurs
+ */
+ public synchronized void setOption(int optionId, Object value)
+ throws SocketException
+ {
+ switch (optionId)
+ {
+ case IP_MULTICAST_IF:
+ case IP_MULTICAST_IF2:
+ impl.setMulticastInterface(optionId, (InetAddress) value);
+ break;
+
+ case IP_MULTICAST_LOOP:
+ case SO_BROADCAST:
+ case SO_KEEPALIVE:
+ case SO_OOBINLINE:
+ case TCP_NODELAY:
+ case IP_TOS:
+ case SO_LINGER:
+ case SO_RCVBUF:
+ case SO_SNDBUF:
+ case SO_TIMEOUT:
+ case SO_REUSEADDR:
+ impl.setOption(optionId, value);
+ return;
+
+ default:
+ throw new SocketException("cannot set option " + optionId);
+ }
+ }
+
+ /**
+ * Retrieves the value of an option on the socket
+ *
+ * @param optionId The identifier of the option to retrieve
+ *
+ * @return The value of the option
+ *
+ * @exception SocketException If an error occurs
+ */
+ public synchronized Object getOption(int optionId)
+ throws SocketException
+ {
+ if (optionId == SO_BINDADDR)
+ {
+ try
+ {
+ InetSocketAddress local = channel.getLocalAddress();
+ if (local == null)
+ return null;
+ return local.getAddress();
+ }
+ catch (SocketException se)
+ {
+ throw se;
+ }
+ catch (IOException ioe)
+ {
+ SocketException se = new SocketException();
+ se.initCause(ioe);
+ throw se;
+ }
+ }
+ if (optionId == IP_MULTICAST_IF || optionId == IP_MULTICAST_IF2)
+ return impl.getMulticastInterface(optionId);
+
+ return impl.getOption(optionId);
+ }
+
+ /**
+ * Closes the socket
+ */
+ protected synchronized void close()
+ {
+ try
+ {
+ if (channel.getState().isValid())
+ channel.close();
+ }
+ catch (IOException ioe)
+ {
+ }
+ }
+
+ /**
+ * Gets the Time to Live value for the socket
+ *
+ * @return The TTL value
+ *
+ * @exception IOException If an error occurs
+ *
+ * @deprecated 1.2
+ */
+ protected synchronized byte getTTL() throws IOException
+ {
+ return (byte) getTimeToLive();
+ }
+
+ /**
+ * Sets the Time to Live value for the socket
+ *
+ * @param ttl The new TTL value
+ *
+ * @exception IOException If an error occurs
+ *
+ * @deprecated 1.2
+ */
+ protected synchronized void setTTL(byte ttl) throws IOException
+ {
+ setTimeToLive(((int) ttl) & 0xFF);
+ }
+
+ /**
+ * Joins a multicast group
+ *
+ * @param addr The group to join
+ *
+ * @exception IOException If an error occurs
+ */
+ protected synchronized void join(InetAddress addr) throws IOException
+ {
+ impl.join(addr);
+ }
+
+ /**
+ * Leaves a multicast group
+ *
+ * @param addr The group to leave
+ *
+ * @exception IOException If an error occurs
+ */
+ protected synchronized void leave(InetAddress addr) throws IOException
+ {
+ impl.leave(addr);
+ }
+
+ /**
+ * What does this method really do?
+ */
+ protected synchronized int peek(InetAddress addr) throws IOException
+ {
+ throw new IOException("Not Implemented Yet");
+ }
+
+ public int peekData(DatagramPacket packet)
+ {
+ throw new InternalError
+ ("PlainDatagramSocketImpl::peekData is not implemented");
+ }
+
+ public void joinGroup(SocketAddress address, NetworkInterface netIf)
+ throws IOException
+ {
+ if (address == null)
+ throw new NullPointerException();
+ if (!(address instanceof InetSocketAddress))
+ throw new SocketException("unknown address type");
+ impl.joinGroup((InetSocketAddress) address, netIf);
+ }
+
+ public void leaveGroup(SocketAddress address, NetworkInterface netIf)
+ throws IOException
+ {
+ if (address == null)
+ throw new NullPointerException();
+ if (!(address instanceof InetSocketAddress))
+ throw new SocketException("unknown address type");
+ impl.leaveGroup((InetSocketAddress) address, netIf);
+ }
+}