| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.harmony.luni.net; |
| |
| import java.io.FileDescriptor; |
| import java.io.IOException; |
| import java.net.DatagramPacket; |
| import java.net.DatagramSocketImpl; |
| import java.net.InetAddress; |
| import java.net.InetSocketAddress; |
| import java.net.MulticastGroupRequest; |
| import java.net.NetworkInterface; |
| import java.net.SocketAddress; |
| import java.net.SocketException; |
| import java.net.UnknownHostException; |
| import org.apache.harmony.luni.platform.INetworkSystem; |
| import org.apache.harmony.luni.platform.Platform; |
| |
| /** |
| * The default, concrete instance of datagram sockets. This class does not |
| * support security checks. Alternative types of DatagramSocketImpl's may be |
| * used by setting the <code>impl.prefix</code> system property. |
| */ |
| public class PlainDatagramSocketImpl extends DatagramSocketImpl { |
| |
| private static final int MCAST_JOIN_GROUP = 19; |
| private static final int MCAST_LEAVE_GROUP = 20; |
| |
| private static final int SO_BROADCAST = 32; |
| |
| static final int TCP_NODELAY = 4; |
| |
| final static int IP_MULTICAST_TTL = 17; |
| |
| private byte[] ipaddress = { 0, 0, 0, 0 }; |
| |
| private INetworkSystem netImpl = Platform.getNetworkSystem(); |
| |
| private volatile boolean isNativeConnected; |
| |
| private boolean streaming = true; |
| |
| private boolean shutdownInput; |
| |
| /** |
| * used to keep address to which the socket was connected to at the native |
| * level |
| */ |
| private InetAddress connectedAddress; |
| |
| private int connectedPort = -1; |
| |
| public PlainDatagramSocketImpl(FileDescriptor fd, int localPort) { |
| super(); |
| this.fd = fd; |
| this.localPort = localPort; |
| } |
| |
| public PlainDatagramSocketImpl() { |
| super(); |
| fd = new FileDescriptor(); |
| } |
| |
| @Override |
| public void bind(int port, InetAddress addr) throws SocketException { |
| netImpl.bind(fd, addr, port); |
| if (0 != port) { |
| localPort = port; |
| } else { |
| localPort = netImpl.getSocketLocalPort(fd); |
| } |
| |
| try { |
| // Ignore failures |
| setOption(SO_BROADCAST, Boolean.TRUE); |
| } catch (IOException e) { |
| } |
| } |
| |
| @Override |
| public void close() { |
| synchronized (fd) { |
| if (fd.valid()) { |
| try { |
| netImpl.close(fd); |
| } catch (IOException e) { |
| } |
| fd = new FileDescriptor(); |
| } |
| } |
| } |
| |
| @Override |
| public void create() throws SocketException { |
| netImpl.socket(fd, false); |
| } |
| |
| @Override protected void finalize() throws Throwable { |
| try { |
| close(); |
| } finally { |
| super.finalize(); |
| } |
| } |
| |
| public Object getOption(int optID) throws SocketException { |
| return netImpl.getSocketOption(fd, optID); |
| } |
| |
| @Override |
| public int getTimeToLive() throws IOException { |
| return ((Integer) getOption(IP_MULTICAST_TTL)).intValue(); |
| } |
| |
| @Override |
| public byte getTTL() throws IOException { |
| return (byte) getTimeToLive(); |
| } |
| |
| @Override |
| public void join(InetAddress addr) throws IOException { |
| setOption(MCAST_JOIN_GROUP, new MulticastGroupRequest(addr, null)); |
| } |
| |
| @Override |
| public void joinGroup(SocketAddress addr, NetworkInterface netInterface) throws IOException { |
| if (addr instanceof InetSocketAddress) { |
| InetAddress groupAddr = ((InetSocketAddress) addr).getAddress(); |
| setOption(MCAST_JOIN_GROUP, new MulticastGroupRequest(groupAddr, netInterface)); |
| } |
| } |
| |
| @Override |
| public void leave(InetAddress addr) throws IOException { |
| setOption(MCAST_LEAVE_GROUP, new MulticastGroupRequest(addr, null)); |
| } |
| |
| @Override |
| public void leaveGroup(SocketAddress addr, NetworkInterface netInterface) throws IOException { |
| if (addr instanceof InetSocketAddress) { |
| InetAddress groupAddr = ((InetSocketAddress) addr).getAddress(); |
| setOption(MCAST_LEAVE_GROUP, new MulticastGroupRequest(groupAddr, netInterface)); |
| } |
| } |
| |
| @Override |
| protected int peek(InetAddress sender) throws IOException { |
| // We don't actually want the data: we just want the DatagramPacket's filled-in address. |
| byte[] bytes = new byte[0]; |
| DatagramPacket packet = new DatagramPacket(bytes, bytes.length); |
| int result = peekData(packet); |
| netImpl.setInetAddress(sender, packet.getAddress().getAddress()); |
| return result; |
| } |
| |
| private void doRecv(DatagramPacket pack, boolean peek) throws IOException { |
| netImpl.recv(fd, pack, pack.getData(), pack.getOffset(), pack.getLength(), peek, |
| isNativeConnected); |
| if (isNativeConnected) { |
| updatePacketRecvAddress(pack); |
| } |
| } |
| |
| @Override |
| public void receive(DatagramPacket pack) throws IOException { |
| doRecv(pack, false); |
| } |
| |
| @Override |
| public int peekData(DatagramPacket pack) throws IOException { |
| doRecv(pack, true); |
| return pack.getPort(); |
| } |
| |
| @Override |
| public void send(DatagramPacket packet) throws IOException { |
| int port = isNativeConnected ? 0 : packet.getPort(); |
| InetAddress address = isNativeConnected ? null : packet.getAddress(); |
| netImpl.send(fd, packet.getData(), packet.getOffset(), packet.getLength(), port, address); |
| } |
| |
| public void setOption(int optID, Object val) throws SocketException { |
| netImpl.setSocketOption(fd, optID, val); |
| } |
| |
| @Override |
| public void setTimeToLive(int ttl) throws IOException { |
| setOption(IP_MULTICAST_TTL, Integer.valueOf(ttl)); |
| } |
| |
| @Override |
| public void setTTL(byte ttl) throws IOException { |
| setTimeToLive((int) ttl & 0xff); // Avoid sign extension. |
| } |
| |
| @Override |
| public void connect(InetAddress inetAddr, int port) throws SocketException { |
| netImpl.connect(fd, inetAddr, port, 0); |
| |
| // if we get here then we are connected at the native level |
| try { |
| connectedAddress = InetAddress.getByAddress(inetAddr.getAddress()); |
| } catch (UnknownHostException e) { |
| // this is never expected to happen as we should not have gotten |
| // here if the address is not resolvable |
| throw new SocketException("Host is unresolved: " + inetAddr.getHostName()); |
| } |
| connectedPort = port; |
| isNativeConnected = true; |
| } |
| |
| @Override |
| public void disconnect() { |
| try { |
| netImpl.disconnectDatagram(fd); |
| } catch (Exception e) { |
| // there is currently no way to return an error so just eat any |
| // exception |
| } |
| connectedPort = -1; |
| connectedAddress = null; |
| isNativeConnected = false; |
| } |
| |
| /** |
| * Set the received address and port in the packet. We do this when the |
| * Datagram socket is connected at the native level and the |
| * recvConnnectedDatagramImpl does not update the packet with address from |
| * which the packet was received |
| * |
| * @param packet |
| * the packet to be updated |
| */ |
| private void updatePacketRecvAddress(DatagramPacket packet) { |
| packet.setAddress(connectedAddress); |
| packet.setPort(connectedPort); |
| } |
| } |