Java Code Examples for java.net.DatagramSocket#setReuseAddress()

public synchronized boolean start(Integer timeout) throws IOException {
  if (mThread == null) {
    // create a DatagramSocket without binding to any address
    mDatagramSocket = new DatagramSocket(null);
    mDatagramSocket.setReuseAddress(true);
    // bind to any free port
    mDatagramSocket.bind(null);
    if (timeout != null && timeout > 0) {
      mDatagramSocket.setSoTimeout(timeout);
    }
    mThread = new Thread(this);
    mThread.start();
    return true;
  }
  return false;
}
 

static void sendStartSignal(int port)
{
    try
    {
        DatagramSocket syncSocket = new DatagramSocket(null);
        syncSocket.setReuseAddress(true);
        syncSocket.setBroadcast(true);

        String msg = "SSI:STRT:RUN1"; //send in SSI format for compatibility
        byte[] data = msg.getBytes("ASCII");
        DatagramPacket packet = new DatagramPacket(data, data.length, Util.getBroadcastAddress(), port);
        syncSocket.send(packet);

        Log.i("start signal sent on port " + port);
    }
    catch(IOException e)
    {
        Log.e("network sync failed", e);
    }
}
 

public Network(InetSocketAddress addr) throws IOException {
	this.addr = addr;
	ds = new DatagramSocket(null);
	ds.setReuseAddress(true);
	ds.bind(new InetSocketAddress((InetAddress) null, addr.getPort()));
	Thread t = new Thread(new Runnable() {
		@Override
		public void run() {
			try {
				while (true) {
					byte[] buf = new byte[576];
					DatagramPacket dp = new DatagramPacket(buf, buf.length);
					ds.receive(dp);
					if (dp.getLength() % 32 == 0)
						netQueue.put(dp);
				}
			} catch (Exception ex) {
				throw new RuntimeException(ex);
			}
		}
	});
	t.setDaemon(true);
	t.start();
}
 

/**
 * Checks to see if a specific port is available.
 *
 * @param port the port to check for availability
 * @return <tt>true</tt> if the port is available, <tt>false</tt> otherwise
 */
private boolean available(int port) {
    try {
        ServerSocket ss = new ServerSocket(port);
        try {
            ss.setReuseAddress(true);
        } finally {
            ss.close();
        }
        DatagramSocket ds = new DatagramSocket(port);
        try {
            ds.setReuseAddress(true);
        } finally {
            ds.close();
        }
        return true;
    } catch (IOException e) {
        return false;
    }
}
 

/**
 * Checks to see if a specific port is available.
 *
 * @param port the port to check for availability
 * @return <tt>true</tt> if the port is available, <tt>false</tt> otherwise
 */
private boolean available(int port) {
    try {
        ServerSocket ss = new ServerSocket(port);
        try {
            ss.setReuseAddress(true);
        } finally {
            ss.close();
        }
        DatagramSocket ds = new DatagramSocket(port);
        try {
            ds.setReuseAddress(true);
        } finally {
            ds.close();
        }
        return true;
    } catch (IOException e) {
        return false;
    }
}
 

@Override
public void init(DaemonContext context) throws Exception {
  System.err.println("Initializing privileged NFS client socket...");
  NfsConfiguration conf = new NfsConfiguration();
  int clientPort = conf.getInt(NfsConfigKeys.DFS_NFS_REGISTRATION_PORT_KEY,
      NfsConfigKeys.DFS_NFS_REGISTRATION_PORT_DEFAULT);
  if (clientPort < 1 || clientPort > 1023) {
    throw new RuntimeException("Must start privileged NFS server with '" +
        NfsConfigKeys.DFS_NFS_REGISTRATION_PORT_KEY + "' configured to a " +
        "privileged port.");
  }
  registrationSocket = new DatagramSocket(
      new InetSocketAddress("localhost", clientPort));
  registrationSocket.setReuseAddress(true);
  args = context.getArguments();
}
 

static void sendStopSignal(int port)
{
    try
    {
        DatagramSocket syncSocket = new DatagramSocket(null);
        syncSocket.setReuseAddress(true);
        syncSocket.setBroadcast(true);

        String msg = "SSI:STOP:QUIT"; //send in SSI format for compatibility
        byte[] data = msg.getBytes("ASCII");
        DatagramPacket packet = new DatagramPacket(data, data.length, Util.getBroadcastAddress(), port);
        syncSocket.send(packet);

        Log.i("stop signal sent on port " + port);
    }
    catch(IOException e)
    {
        Log.e("network sync failed", e);
    }
}
 

/**
 * Checks to see if a specific port is available.
 *
 * @param port the port to check for availability
 * @return <tt>true</tt> if the port is available, <tt>false</tt> otherwise
 */
private boolean available(int port) {
    try {
        ServerSocket ss = new ServerSocket(port);
        try {
            ss.setReuseAddress(true);
        } finally {
            ss.close();
        }
        DatagramSocket ds = new DatagramSocket(port);
        try {
            ds.setReuseAddress(true);
        } finally {
            ds.close();
        }
        return true;
    } catch (IOException e) {
        return false;
    }
}
 

@Override
public void init(DaemonContext context) throws Exception {
  System.err.println("Initializing privileged NFS client socket...");
  NfsConfiguration conf = new NfsConfiguration();
  int clientPort = conf.getInt(NfsConfigKeys.DFS_NFS_REGISTRATION_PORT_KEY,
      NfsConfigKeys.DFS_NFS_REGISTRATION_PORT_DEFAULT);
  if (clientPort < 1 || clientPort > 1023) {
    throw new RuntimeException("Must start privileged NFS server with '" +
        NfsConfigKeys.DFS_NFS_REGISTRATION_PORT_KEY + "' configured to a " +
        "privileged port.");
  }
  registrationSocket = new DatagramSocket(
      new InetSocketAddress("localhost", clientPort));
  registrationSocket.setReuseAddress(true);
  args = context.getArguments();
}
 

/**
 * Constructs a <code>BLDevice</code>, with a device type (constants),
 * hostname and MAC address
 * 
 * @param deviceType
 *            Device type constants (<code>BLDevice.DEV_*</code>)
 * @param deviceDesc
 *            Friendly device description
 * @param host
 *            Hostname of target Broadlink device
 * @param mac
 *            MAC address of target Broadlink device
 * @throws IOException
 *             Problems on constructing a datagram socket
 */
protected BLDevice(short deviceType, String deviceDesc, String host, Mac mac) throws IOException {
    key = INITIAL_KEY;
    iv = INITIAL_IV;
    id = new byte[] { 0, 0, 0, 0 };

    pktCount = new Random().nextInt(0xffff);

    this.deviceType = deviceType;
    this.deviceDesc = deviceDesc;
    
    this.host = host;
    this.mac = mac;

    sock = new DatagramSocket();
    sock.setReuseAddress(true);
    sock.setBroadcast(true);
    aes = new AES(iv, key);
    alreadyAuthorized = false;
}
 

/**
 * Checks to see if a specific port is available.
 *
 * @param port the port to check for availability
 * @return <tt>true</tt> if the port is available, <tt>false</tt> otherwise
 */
private boolean available(int port) {
    try {
        ServerSocket ss = new ServerSocket(port);
        try {
            ss.setReuseAddress(true);
        } finally {
            ss.close();
        }
        DatagramSocket ds = new DatagramSocket(port);
        try {
            ds.setReuseAddress(true);
        } finally {
            ds.close();
        }
        return true;
    } catch (IOException e) {
        return false;
    }
}
 

@Override
protected void connect() throws Exception {

	// Start broadcast receiver
	broadcastReceiver = new DatagramSocket();
	broadcastReceiver.setReuseAddress(udpReuseAddr);
	broadcastReceiver.setBroadcast(true);
	broadcastReceiver.connect(InetAddress.getByName(udpAddress), udpPort);

	// Start thread
	super.connect();

	logger.info("Broadcast discovery service started on udp://" + udpAddress + ':' + udpPort + '.');
}
 

public NetworkSync(Pipeline.SyncType type, boolean isMaster, InetAddress masterAddr, int port, int interval)
{
    frame = Pipeline.getInstance();

    this.isMaster = isMaster;
    this.hostAddr = masterAddr;
    this.port = port;
    this.type = type;

    try {
        sendSocket = new DatagramSocket();
        recvSocket = new DatagramSocket(port);
        sendSocket.setReuseAddress(true);
        recvSocket.setReuseAddress(true);
    } catch (SocketException e) {
        Log.e("error setting up network sync", e);
    }

    listener = new SyncListener(port);
    new Thread(listener).start();

    if(type == Pipeline.SyncType.CONTINUOUS && interval > 0 && !isMaster)
    {
        sender = new SyncSender(interval);
        new Thread(sender).start();
    }
}
 

/**
 * 同じアドレスを他のソケットでも使用可能にするかどうか
 * @param reuse
 * @throws SocketException
 */
public void setReuseAddress(final boolean reuse) throws SocketException {
	final DatagramSocket socket = channel != null ? channel.socket() : null;
	if (socket != null) {
		socket.setReuseAddress(reuse);
	}
}
 

private void send(NetworkPackage networkPackage) throws Exception {
    switch (networkPackage.getCommunicationType()) {
        case UDP:
            InetAddress host = InetAddress.getByName(networkPackage.getHost());
            int port = networkPackage.getPort();

            socket = new DatagramSocket(null);
            socket.setReuseAddress(true);
            socket.connect(host, port);

            byte[] messageBuffer = networkPackage.getMessage().getBytes();
            DatagramPacket messagePacket = new DatagramPacket(messageBuffer, messageBuffer.length, host, port);
            socket.send(messagePacket);

            Log.d("UDP Sender", "Host: " + host.getHostAddress() + ":" + port
                    + " Message: \"" + new String(messageBuffer) + "\" sent.");

            socket.disconnect();
            socket.close();
            break;
        case HTTP:
            URL url = new URL("http://" + networkPackage.getHost() + ":" + networkPackage.getPort() + "/" +
                    networkPackage.getMessage());
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            try {
                InputStream in = new BufferedInputStream(urlConnection.getInputStream());
                readStream(in);
            } finally {
                urlConnection.disconnect();
            }
            break;
    }
}
 

@Override
protected Void doInBackground(Void... params)
{
    Logging.info(this, "started, network=" + connectionState.isNetwork()
            + ", wifi=" + connectionState.isWifi());

    final Character[] models = new Character[]{ 'x', 'p' };
    int modelId = 0;

    try
    {
        final InetAddress target = InetAddress.getByName("255.255.255.255");

        final DatagramSocket socket = new DatagramSocket(null);
        socket.setReuseAddress(true);
        socket.setBroadcast(true);
        socket.setSoTimeout(500);
        socket.bind(new InetSocketAddress(ISCP_PORT));

        while (!isStopped())
        {
            request(socket, target, models[modelId]);
            modelId++;
            if (modelId > 1)
            {
                modelId = 0;
            }
        }
        socket.close();
    }
    catch (Exception e)
    {
        Logging.info(this, "Can not open socket: " + e.toString());
    }

    Logging.info(this, "stopped");
    return null;
}
 

private boolean test1()
    throws UtilityException, SocketException, UnknownHostException, IOException,
        MessageAttributeParsingException, MessageHeaderParsingException {
  int timeSinceFirstTransmission = 0;
  int timeout = timeoutInitValue;
  do {
    try {
      // Test 1 including response
      socketTest1 = new DatagramSocket(new InetSocketAddress(iaddress, 0));
      socketTest1.setReuseAddress(true);
      socketTest1.connect(InetAddress.getByName(stunServer), port);
      socketTest1.setSoTimeout(timeout);

      MessageHeader sendMH = new MessageHeader(MessageHeader.MessageHeaderType.BindingRequest);
      sendMH.generateTransactionID();

      ChangeRequest changeRequest = new ChangeRequest();
      sendMH.addMessageAttribute(changeRequest);

      byte[] data = sendMH.getBytes();
      DatagramPacket send = new DatagramPacket(data, data.length);
      socketTest1.send(send);
      LOGGER.debug("Test 1: Binding Request sent.");

      MessageHeader receiveMH = new MessageHeader();
      while (!receiveMH.equalTransactionID(sendMH)) {
        DatagramPacket receive = new DatagramPacket(new byte[200], 200);
        socketTest1.receive(receive);
        receiveMH = MessageHeader.parseHeader(receive.getData());
        receiveMH.parseAttributes(receive.getData());
      }

      ma =
          (MappedAddress)
              receiveMH.getMessageAttribute(MessageAttribute.MessageAttributeType.MappedAddress);
      ca =
          (ChangedAddress)
              receiveMH.getMessageAttribute(MessageAttribute.MessageAttributeType.ChangedAddress);
      ErrorCode ec =
          (ErrorCode)
              receiveMH.getMessageAttribute(MessageAttribute.MessageAttributeType.ErrorCode);
      if (ec != null) {
        di.setError(ec.getResponseCode(), ec.getReason());
        LOGGER.debug("Message header contains an Errorcode message attribute.");
        return false;
      }
      if (ma == null || ca == null) {
        di.setError(
            700,
            "The server is sending an incomplete response (Mapped Address and Changed Address message attributes are missing). The client should not retry.");
        LOGGER.debug(
            "Response does not contain a Mapped Address or Changed Address message attribute.");
        return false;
      } else {
        di.setPublicIP(ma.getAddress().getInetAddress());
        if (ma.getPort() == socketTest1.getLocalPort()
            && ma.getAddress().getInetAddress().equals(socketTest1.getLocalAddress())) {
          LOGGER.debug("Node is not natted.");
          nodeNatted = false;
        } else {
          LOGGER.debug("Node is natted.");
        }
        return true;
      }
    } catch (SocketTimeoutException ste) {
      if (timeSinceFirstTransmission < 7900) {
        LOGGER.debug("Test 1: Socket timeout while receiving the response.");
        timeSinceFirstTransmission += timeout;
        int timeoutAddValue = timeSinceFirstTransmission * 2;
        if (timeoutAddValue > 1600) {
          timeoutAddValue = 1600;
        }
        timeout = timeoutAddValue;
      } else {
        // node is not capable of udp communication
        LOGGER.debug(
            "Test 1: Socket timeout while receiving the response. Maximum retry limit exceed. Give up.");
        di.setBlockedUDP();
        LOGGER.debug("Node is not capable of UDP communication.");
        return false;
      }
    }
  } while (true);
}
 

@Override
public void InitNetwork() {
    //struct hostent* hostentry;  // host information entry

    doomcom = new doomcom_t();
    //netbuffer = new doomdata_t();
    DOOM.setDoomCom(doomcom);
    //DM.netbuffer = netbuffer;

    // set up for network
    if (!DOOM.cVarManager.with(CommandVariable.DUP, 0, (Character c) -> {
        doomcom.ticdup = (short) (c - '0');
        if (doomcom.ticdup < 1) {
            doomcom.ticdup = 1;
        }
        if (doomcom.ticdup > 9) {
            doomcom.ticdup = 9;
        }
    })) {
        doomcom.ticdup = 1;
    }

    if (DOOM.cVarManager.bool(CommandVariable.EXTRATIC)) {
        doomcom.extratics = 1;
    } else {
        doomcom.extratics = 0;
    }

    DOOM.cVarManager.with(CommandVariable.PORT, 0, (Integer port) -> {
        DOOMPORT = port;
        System.out.println("using alternate port " + DOOMPORT);
    });

    // parse network game options,
    //  -net <consoleplayer> <host> <host> ...
    if (!DOOM.cVarManager.present(CommandVariable.NET)) {
        // single player game
        DOOM.netgame = false;
        doomcom.id = DOOMCOM_ID;
        doomcom.numplayers = doomcom.numnodes = 1;
        doomcom.deathmatch = 0; // false
        doomcom.consoleplayer = 0;
        return;
    }

    DOOM.netgame = true;

    // parse player number and host list
    doomcom.consoleplayer = (short) (DOOM.cVarManager.get(CommandVariable.NET, Character.class, 0).get() - '1');

    RECVPORT = SENDPORT = DOOMPORT;
    if (doomcom.consoleplayer == 0) {
        SENDPORT++;
    } else {
        RECVPORT++;
    }

    doomcom.numnodes = 1;  // this node for sure

    String[] hosts = DOOM.cVarManager.get(CommandVariable.NET, String[].class, 1).get();
    for (String host: hosts) {
        try {
            InetAddress addr = InetAddress.getByName(host);
            DatagramSocket ds = new DatagramSocket(null);
            ds.setReuseAddress(true);
            ds.connect(addr, SENDPORT);

            sendaddress[doomcom.numnodes] = ds;
        } catch (SocketException | UnknownHostException e) {
            e.printStackTrace();
        }

        doomcom.numnodes++;
    }

    doomcom.id = DOOMCOM_ID;
    doomcom.numplayers = doomcom.numnodes;

    // build message to receive
    try {
        insocket = new DatagramSocket(null);
        insocket.setReuseAddress(true);
        insocket.setSoTimeout(1);
        insocket.bind(new InetSocketAddress(RECVPORT));
    } catch (SocketException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }
}
 

public BroadcastingEchoServer() throws IOException {
    socket = new DatagramSocket(null);
    socket.setReuseAddress(true);
    socket.bind(new InetSocketAddress(4445));
}
 

/**
 * Sends a compiled packet to a destination host and port, and receives a
 * datagram from the source port specified.
 * 
 * @param pkt
 *            The compiled packet to be sent
 * @param sourceIpAddr
 *            Source IP address to be binded for receiving datagrams
 * @param sourcePort
 *            Source Port to be bineded for receiving datagrams
 * @param destIpAddr
 *            Destination IP address
 * @param destPort
 *            Destination Port
 * @param timeout
 *            Socket timeout. 0 will disable the timeout
 * @param bufSize
 *            Receiving datagram's buffer size
 * @return The received datagram
 * @throws IOException
 *             Thrown if socket timed out, cannot bind source IP and source
 *             port, no permission, etc.
 */
public static DatagramPacket sendPkt(Packet pkt, InetAddress sourceIpAddr, int sourcePort, InetAddress destIpAddr,
        int destPort, int timeout, int bufSize) throws IOException {
	log.debug("sendPkt - call with create socket for: " + sourceIpAddr.getHostAddress() + " and port " + sourcePort);
    DatagramSocket sock = new DatagramSocket(sourcePort, sourceIpAddr);

    sock.setBroadcast(true);
    sock.setReuseAddress(true);

    DatagramPacket recePkt = sendPkt(sock, pkt, destIpAddr, destPort, timeout, bufSize);
    sock.close();

    return recePkt;
}