| /* 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); |
| } |
| } |