| /* |
| * Copyright (c) 2001, 2010, 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.net.*; |
| import java.nio.*; |
| import java.nio.channels.*; |
| |
| |
| // Make a datagram-socket channel look like a datagram socket. |
| // |
| // The methods in this class are defined in exactly the same order as in |
| // java.net.DatagramSocket so as to simplify tracking future changes to that |
| // class. |
| // |
| |
| public class DatagramSocketAdaptor |
| extends DatagramSocket |
| { |
| |
| // The channel being adapted |
| private final DatagramChannelImpl dc; |
| |
| // Timeout "option" value for receives |
| private volatile int timeout = 0; |
| |
| // ## super will create a useless impl |
| private DatagramSocketAdaptor(DatagramChannelImpl dc) throws IOException { |
| // Invoke the DatagramSocketAdaptor(SocketAddress) constructor, |
| // passing a dummy DatagramSocketImpl object to aovid any native |
| // resource allocation in super class and invoking our bind method |
| // before the dc field is initialized. |
| super(dummyDatagramSocket); |
| this.dc = dc; |
| } |
| |
| public static DatagramSocket create(DatagramChannelImpl dc) { |
| try { |
| return new DatagramSocketAdaptor(dc); |
| } catch (IOException x) { |
| throw new Error(x); |
| } |
| } |
| |
| private void connectInternal(SocketAddress remote) |
| throws SocketException |
| { |
| InetSocketAddress isa = Net.asInetSocketAddress(remote); |
| int port = isa.getPort(); |
| if (port < 0 || port > 0xFFFF) |
| throw new IllegalArgumentException("connect: " + port); |
| if (remote == null) |
| throw new IllegalArgumentException("connect: null address"); |
| if (isClosed()) |
| return; |
| try { |
| dc.connect(remote); |
| } catch (Exception x) { |
| Net.translateToSocketException(x); |
| } |
| } |
| |
| public void bind(SocketAddress local) throws SocketException { |
| try { |
| if (local == null) |
| local = new InetSocketAddress(0); |
| dc.bind(local); |
| } catch (Exception x) { |
| Net.translateToSocketException(x); |
| } |
| } |
| |
| public void connect(InetAddress address, int port) { |
| try { |
| connectInternal(new InetSocketAddress(address, port)); |
| } catch (SocketException x) { |
| // Yes, j.n.DatagramSocket really does this |
| } |
| } |
| |
| public void connect(SocketAddress remote) throws SocketException { |
| if (remote == null) |
| throw new IllegalArgumentException("Address can't be null"); |
| connectInternal(remote); |
| } |
| |
| public void disconnect() { |
| try { |
| dc.disconnect(); |
| } catch (IOException x) { |
| throw new Error(x); |
| } |
| } |
| |
| public boolean isBound() { |
| return dc.localAddress() != null; |
| } |
| |
| public boolean isConnected() { |
| return dc.remoteAddress() != null; |
| } |
| |
| public InetAddress getInetAddress() { |
| return (isConnected() |
| ? Net.asInetSocketAddress(dc.remoteAddress()).getAddress() |
| : null); |
| } |
| |
| public int getPort() { |
| return (isConnected() |
| ? Net.asInetSocketAddress(dc.remoteAddress()).getPort() |
| : -1); |
| } |
| |
| public void send(DatagramPacket p) throws IOException { |
| synchronized (dc.blockingLock()) { |
| if (!dc.isBlocking()) |
| throw new IllegalBlockingModeException(); |
| try { |
| synchronized (p) { |
| ByteBuffer bb = ByteBuffer.wrap(p.getData(), |
| p.getOffset(), |
| p.getLength()); |
| if (dc.isConnected()) { |
| if (p.getAddress() == null) { |
| // Legacy DatagramSocket will send in this case |
| // and set address and port of the packet |
| InetSocketAddress isa = (InetSocketAddress) |
| dc.remoteAddress(); |
| p.setPort(isa.getPort()); |
| p.setAddress(isa.getAddress()); |
| dc.write(bb); |
| } else { |
| // Target address may not match connected address |
| dc.send(bb, p.getSocketAddress()); |
| } |
| } else { |
| // Not connected so address must be valid or throw |
| dc.send(bb, p.getSocketAddress()); |
| } |
| } |
| } catch (IOException x) { |
| Net.translateException(x); |
| } |
| } |
| } |
| |
| // Must hold dc.blockingLock() |
| // |
| private SocketAddress receive(ByteBuffer bb) throws IOException { |
| if (timeout == 0) { |
| return dc.receive(bb); |
| } |
| |
| // Implement timeout with a selector |
| SelectionKey sk = null; |
| Selector sel = null; |
| dc.configureBlocking(false); |
| try { |
| int n; |
| SocketAddress sender; |
| if ((sender = dc.receive(bb)) != null) |
| return sender; |
| sel = Util.getTemporarySelector(dc); |
| sk = dc.register(sel, SelectionKey.OP_READ); |
| long to = timeout; |
| for (;;) { |
| if (!dc.isOpen()) |
| throw new ClosedChannelException(); |
| long st = System.currentTimeMillis(); |
| int ns = sel.select(to); |
| if (ns > 0 && sk.isReadable()) { |
| if ((sender = dc.receive(bb)) != null) |
| return sender; |
| } |
| sel.selectedKeys().remove(sk); |
| to -= System.currentTimeMillis() - st; |
| if (to <= 0) |
| throw new SocketTimeoutException(); |
| |
| } |
| } finally { |
| if (sk != null) |
| sk.cancel(); |
| if (dc.isOpen()) |
| dc.configureBlocking(true); |
| if (sel != null) |
| Util.releaseTemporarySelector(sel); |
| } |
| } |
| |
| public void receive(DatagramPacket p) throws IOException { |
| synchronized (dc.blockingLock()) { |
| if (!dc.isBlocking()) |
| throw new IllegalBlockingModeException(); |
| try { |
| synchronized (p) { |
| ByteBuffer bb = ByteBuffer.wrap(p.getData(), |
| p.getOffset(), |
| p.getLength()); |
| SocketAddress sender = receive(bb); |
| p.setSocketAddress(sender); |
| p.setLength(bb.position() - p.getOffset()); |
| } |
| } catch (IOException x) { |
| Net.translateException(x); |
| } |
| } |
| } |
| |
| public InetAddress getLocalAddress() { |
| if (isClosed()) |
| return null; |
| SocketAddress local = dc.localAddress(); |
| if (local == null) |
| local = new InetSocketAddress(0); |
| InetAddress result = ((InetSocketAddress)local).getAddress(); |
| SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) { |
| try { |
| sm.checkConnect(result.getHostAddress(), -1); |
| } catch (SecurityException x) { |
| return new InetSocketAddress(0).getAddress(); |
| } |
| } |
| return result; |
| } |
| |
| public int getLocalPort() { |
| if (isClosed()) |
| return -1; |
| try { |
| SocketAddress local = dc.getLocalAddress(); |
| if (local != null) { |
| return ((InetSocketAddress)local).getPort(); |
| } |
| } catch (Exception x) { |
| } |
| return 0; |
| } |
| |
| public void setSoTimeout(int timeout) throws SocketException { |
| this.timeout = timeout; |
| } |
| |
| public int getSoTimeout() throws SocketException { |
| return timeout; |
| } |
| |
| private void setBooleanOption(SocketOption<Boolean> name, boolean value) |
| throws SocketException |
| { |
| try { |
| dc.setOption(name, value); |
| } catch (IOException x) { |
| Net.translateToSocketException(x); |
| } |
| } |
| |
| private void setIntOption(SocketOption<Integer> name, int value) |
| throws SocketException |
| { |
| try { |
| dc.setOption(name, value); |
| } catch (IOException x) { |
| Net.translateToSocketException(x); |
| } |
| } |
| |
| private boolean getBooleanOption(SocketOption<Boolean> name) throws SocketException { |
| try { |
| return dc.getOption(name).booleanValue(); |
| } catch (IOException x) { |
| Net.translateToSocketException(x); |
| return false; // keep compiler happy |
| } |
| } |
| |
| private int getIntOption(SocketOption<Integer> name) throws SocketException { |
| try { |
| return dc.getOption(name).intValue(); |
| } catch (IOException x) { |
| Net.translateToSocketException(x); |
| return -1; // keep compiler happy |
| } |
| } |
| |
| public void setSendBufferSize(int size) throws SocketException { |
| if (size <= 0) |
| throw new IllegalArgumentException("Invalid send size"); |
| setIntOption(StandardSocketOptions.SO_SNDBUF, size); |
| } |
| |
| public int getSendBufferSize() throws SocketException { |
| return getIntOption(StandardSocketOptions.SO_SNDBUF); |
| } |
| |
| public void setReceiveBufferSize(int size) throws SocketException { |
| if (size <= 0) |
| throw new IllegalArgumentException("Invalid receive size"); |
| setIntOption(StandardSocketOptions.SO_RCVBUF, size); |
| } |
| |
| public int getReceiveBufferSize() throws SocketException { |
| return getIntOption(StandardSocketOptions.SO_RCVBUF); |
| } |
| |
| public void setReuseAddress(boolean on) throws SocketException { |
| setBooleanOption(StandardSocketOptions.SO_REUSEADDR, on); |
| } |
| |
| public boolean getReuseAddress() throws SocketException { |
| return getBooleanOption(StandardSocketOptions.SO_REUSEADDR); |
| |
| } |
| |
| public void setBroadcast(boolean on) throws SocketException { |
| setBooleanOption(StandardSocketOptions.SO_BROADCAST, on); |
| } |
| |
| public boolean getBroadcast() throws SocketException { |
| return getBooleanOption(StandardSocketOptions.SO_BROADCAST); |
| } |
| |
| public void setTrafficClass(int tc) throws SocketException { |
| setIntOption(StandardSocketOptions.IP_TOS, tc); |
| } |
| |
| public int getTrafficClass() throws SocketException { |
| return getIntOption(StandardSocketOptions.IP_TOS); |
| } |
| |
| public void close() { |
| try { |
| dc.close(); |
| } catch (IOException x) { |
| throw new Error(x); |
| } |
| } |
| |
| public boolean isClosed() { |
| return !dc.isOpen(); |
| } |
| |
| public DatagramChannel getChannel() { |
| return dc; |
| } |
| |
| /* |
| * A dummy implementation of DatagramSocketImpl that can be passed to the |
| * DatagramSocket constructor so that no native resources are allocated in |
| * super class. |
| */ |
| private static final DatagramSocketImpl dummyDatagramSocket |
| = new DatagramSocketImpl() |
| { |
| protected void create() throws SocketException {} |
| |
| protected void bind(int lport, InetAddress laddr) throws SocketException {} |
| |
| protected void send(DatagramPacket p) throws IOException {} |
| |
| protected int peek(InetAddress i) throws IOException { return 0; } |
| |
| protected int peekData(DatagramPacket p) throws IOException { return 0; } |
| |
| protected void receive(DatagramPacket p) throws IOException {} |
| |
| protected void setTTL(byte ttl) throws IOException {} |
| |
| protected byte getTTL() throws IOException { return 0; } |
| |
| protected void setTimeToLive(int ttl) throws IOException {} |
| |
| protected int getTimeToLive() throws IOException { return 0;} |
| |
| protected void join(InetAddress inetaddr) throws IOException {} |
| |
| protected void leave(InetAddress inetaddr) throws IOException {} |
| |
| protected void joinGroup(SocketAddress mcastaddr, |
| NetworkInterface netIf) throws IOException {} |
| |
| protected void leaveGroup(SocketAddress mcastaddr, |
| NetworkInterface netIf) throws IOException {} |
| |
| protected void close() {} |
| |
| public Object getOption(int optID) throws SocketException { return null;} |
| |
| public void setOption(int optID, Object value) throws SocketException {} |
| }; |
| } |