Example usage for java.net DatagramPacket DatagramPacket

Introduction

In this page you can find the example usage for java.net DatagramPacket DatagramPacket.

Prototype

public DatagramPacket(byte buf[], int length) 

Source Link

Document

Constructs a DatagramPacket for receiving packets of length length .

Usage

From source file:com.kecso.socket.ServerSocketControl.java

@Override
public void run() {
    DatagramSocket sock = null;//from   ww  w  . j a v  a2s .com

    try {
        sock = new DatagramSocket(8888);
        sock.setSoTimeout(1000);

        byte[] buffer = new byte[65536];
        DatagramPacket incoming = new DatagramPacket(buffer, buffer.length);

        while (!Thread.currentThread().isInterrupted()) {
            try {
                sock.receive(incoming);
                byte[] data = incoming.getData();
                this.udpMessage = SerializationUtils.deserialize(data);

                byte[] response = SerializationUtils.serialize(
                        this.output != null
                                ? new UdpResponse((float) output.getSpeed(), (float) output.getVerticalSpeed(),
                                        (float) output.getAltitude(), (float) output.getRpm())
                                : null);
                DatagramPacket dp = new DatagramPacket(response, response.length, incoming.getAddress(),
                        incoming.getPort());
                sock.send(dp);
            } catch (SocketTimeoutException e) {
            }
        }
    } catch (Exception e) {
        System.err.println("IOException " + e);
    } finally {
        if (sock != null) {
            sock.close();
        }

    }
}

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From source file:com.wmfsystem.eurekaserver.broadcast.Server.java

public void run() {
    try {//from   w  w  w  .  j av  a2 s.  co  m
        socket = new DatagramSocket(DEFAULT_PORT);
    } catch (Exception ex) {
        System.out.println("Problem creating socket on port: " + DEFAULT_PORT);
    }

    packet = new DatagramPacket(new byte[1], 1);

    while (true) {
        try {
            socket.receive(packet);
            System.out.println("Received from: " + packet.getAddress() + ":" + packet.getPort());
            byte[] outBuffer = new java.util.Date().toString().getBytes();
            packet.setData(outBuffer);
            packet.setLength(outBuffer.length);
            socket.setBroadcast(true);
            socket.send(packet);

            Set<InetAddress> localAddress = getLocalAddress();

            Set<String> ips = localAddress.stream().map(ad -> ad.getHostAddress()).collect(Collectors.toSet())
                    .stream().sorted().collect(Collectors.toSet());

            RestTemplate template = new RestTemplate();

            ips.forEach(ip -> {
                template.exchange("http://" + packet.getAddress().getHostAddress().concat(":8000?ip={ip}"),
                        HttpMethod.GET, HttpEntity.EMPTY, Void.class, ip.concat(":8000"));
                try {
                    template.exchange("http://" + packet.getAddress().getHostAddress().concat(":8000?ip={ip}"),
                            HttpMethod.GET, HttpEntity.EMPTY, Void.class, ip.concat(":8000"));
                } catch (Exception e) {
                    e.printStackTrace();
                }
            });

            System.out.println("Message ----> " + packet.getAddress().getHostAddress());

        } catch (IOException ie) {
            ie.printStackTrace();
        }
    }
}

---

From source file:werewolf.client.DatagramReceiverThread.java

public DatagramReceiverThread(int listenPort) {
    buf = new byte[4096];
    packet = new DatagramPacket(buf, buf.length);
    this.listenPort = listenPort;

    try {// w w  w .j a v  a  2  s .  c o m
        socket = new DatagramSocket(listenPort);
    } catch (SocketException ex) {
        Logger.getLogger(DatagramReceiverThread.class.getName()).log(Level.SEVERE, null, ex);
    }
}

---

From source file:poisondog.net.udp.SendMission.java

public Void execute(DatagramParameter parameter) throws IOException {
    DatagramSocket socket = new DatagramSocket();

    socket.setReuseAddress(true);/*from  w  w  w  . j  a v a  2 s .co  m*/
    socket.setBroadcast(parameter.getBroadcast());

    if (parameter.getTimeout() > 0)
        socket.setSoTimeout(parameter.getTimeout());

    String data = IOUtils.toString(parameter.getInputStream());
    DatagramPacket packet = new DatagramPacket(data.getBytes(), data.length());
    packet.setAddress(InetAddress.getByName(parameter.getHost()));
    if (parameter.getPort() > 0)
        packet.setPort(parameter.getPort());
    socket.send(packet);
    socket.close();
    return null;
}

---

From source file:poisondog.net.udp.DatagramMission.java

public DatagramResponse execute(DatagramParameter parameter) throws IOException {
    DatagramSocket socket = new DatagramSocket(null);
    socket.setReuseAddress(true);// w ww  .  j av a2  s . c  o m

    socket.setBroadcast(parameter.getBroadcast());
    if (parameter.getTimeout() > 0)
        socket.setSoTimeout(parameter.getTimeout());
    String data = IOUtils.toString(parameter.getInputStream());
    DatagramPacket packet = new DatagramPacket(data.getBytes(), data.length());
    packet.setAddress(InetAddress.getByName(parameter.getHost()));
    packet.setPort(parameter.getPort());
    socket.send(packet);

    DatagramResponse response = new DatagramResponse(parameter.getResponseLength());
    DatagramPacket responsePacket = new DatagramPacket(response.getContent(), response.getContent().length);
    socket.receive(responsePacket);
    response.setAddress(responsePacket.getAddress().getHostAddress());
    response.setPacketLength(responsePacket.getLength());
    socket.close();
    return response;
}

---

From source file:org.vesalainen.net.sntp.SNTPServer.java

@Override
public void run() {
    try {/*from w  ww  . j a v  a  2  s .co m*/
        DatagramSocket socket = new DatagramSocket(123);
        byte[] buffer = new byte[1024];
        DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
        while (true) {
            socket.receive(packet);
            NtpV3Impl msg = new NtpV3Impl();
            msg.setDatagramPacket(packet);
            System.err.println(msg);
        }
    } catch (SocketException ex) {
        Logger.getLogger(SNTPServer.class.getName()).log(Level.SEVERE, null, ex);
    } catch (IOException ex) {
        Logger.getLogger(SNTPServer.class.getName()).log(Level.SEVERE, null, ex);
    }
}

---

From source file:org.eredlab.g4.ccl.net.DiscardUDPClient.java

public DiscardUDPClient() {
    _sendPacket = new DatagramPacket(new byte[0], 0);
}

---

From source file:com.esri.geoevent.test.performance.ClockSync.java

@Override
public void run() {
    DatagramSocket socket = null;
    try {/* w  ww .  j  ava 2  s.c om*/
        byte[] incomingBuffer = new byte[1024];
        DatagramPacket packet = new DatagramPacket(incomingBuffer, incomingBuffer.length);

        ByteBuffer bb = ByteBuffer.allocate(8);
        DatagramPacket outgoingPacket = new DatagramPacket(bb.array(), 0, 8, null, port);
        socket = new DatagramSocket(port);
        socket.setSoTimeout(100);
        while (isRunning.get()) {
            try {
                socket.receive(packet);
                long now = System.currentTimeMillis();
                bb.putLong(now);
                outgoingPacket.setAddress(packet.getAddress());
                outgoingPacket.setPort(packet.getPort());
                socket.send(outgoingPacket);
                bb.clear();
                //System.out.println("Sent the time " + now);
            } catch (SocketTimeoutException ex) {
                // Do nothing if nothing was sent.
            }
        }
    } catch (BindException e) {
        // port is in use - increment and try again
        port++;
        this.run();
    } catch (SocketException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        IOUtils.closeQuietly(socket);
    }
}

---

From source file:werewolf_client.Werewolf_Client.java

public void recvFromClient(String adr, int p) throws SocketException, IOException {
    DatagramSocket recv = new DatagramSocket(p);
    byte[] recvData = new byte[1024];

    while (true) {
        DatagramPacket recvPacket = new DatagramPacket(recvData, recvData.length);
        recv.receive(recvPacket);/*from w w w  . jav a  2 s.  c  om*/

        String s = new String(recvPacket.getData(), 0, recvPacket.getLength());
        System.out.println("ReceivedD\n" + s);
    }
}

---

From source file:org.springframework.integration.ip.udp.DatagramPacketSendingHandlerTests.java

@Test
public void verifySend() throws Exception {
    final int testPort = SocketUtils.findAvailableUdpSocket();
    byte[] buffer = new byte[8];
    final DatagramPacket receivedPacket = new DatagramPacket(buffer, buffer.length);
    final CountDownLatch latch = new CountDownLatch(1);
    Executors.newSingleThreadExecutor().execute(new Runnable() {
        public void run() {
            try {
                DatagramSocket socket = new DatagramSocket(testPort);
                socket.receive(receivedPacket);
                latch.countDown();/* ww w.ja v a  2 s .c o m*/
                socket.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    });
    Thread.sleep(1000);
    UnicastSendingMessageHandler handler = new UnicastSendingMessageHandler("localhost", testPort);
    String payload = "foo";
    handler.handleMessage(MessageBuilder.withPayload(payload).build());
    assertTrue(latch.await(3000, TimeUnit.MILLISECONDS));
    byte[] src = receivedPacket.getData();
    int length = receivedPacket.getLength();
    int offset = receivedPacket.getOffset();
    byte[] dest = new byte[length];
    System.arraycopy(src, offset, dest, 0, length);
    assertEquals(payload, new String(dest));
    handler.shutDown();
}

---

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