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, InetAddress address, int port) 

Source Link

Document

Constructs a datagram packet for sending packets of length length to the specified port number on the specified host.

Usage

From source file:com.cafbit.multicasttest.NetThread.java

/**
 * Transmit an mDNS query on the local network.
 * @param host/*w ww  .j  a v  a  2 s. c o m*/
 * @throws IOException
 */
private void query(String host) throws IOException {
    Log.i(TAG, "query  essai 1: " + host);
    byte[] requestData = (new DNSMessage(host)).serialize();
    DatagramPacket request = new DatagramPacket(requestData, requestData.length,
            InetAddress.getByAddress(MDNS_ADDR), MDNS_PORT);
    multicastSocket.send(request);
}

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From source file:com.summit.jbeacon.beacons.MultiCastResourceBeacon.java

/**
 * refresh the resources that are available.
 * @throws MultiCastResourceBeaconException if
 * the data fails to be refreshed/*w  ww .ja v a2  s  . c o  m*/
 */
public final void refreshData() throws MultiCastResourceBeaconException {
    while (!listenerThread.isRunning()) {
        try {
            log.debug("Waiting for server to start.");
            Thread.sleep(threadSleep);
        } catch (InterruptedException ex) {
            log.warn("Thread death while waiting for listener to run.");
        }

    }
    log.info("Attempting to refresh data.");
    if (listeningSocket == null) {
        throw new MultiCastResourceBeaconException(
                "Beacon is not " + "listening for responses. Initialize the " + "listener first!");
    }
    MulticastSocket s = null;
    try {
        s = new MulticastSocket();
        s.setReuseAddress(true);
    } catch (IOException ex) {
        throw new MultiCastResourceBeaconException("Error creating multicast socket...", ex);
    }

    String broadcastMessage = getBroadcastText() + " : " + getIp() + ":" + getHostName() + ":"
            + listeningSocket.getLocalPort();
    byte[] buf = broadcastMessage.getBytes();
    DatagramPacket pack = null;
    try {
        log.info("Multicast port: " + getGroupPort());
        log.info("Multicast group: " + getGroupAddress());
        pack = new DatagramPacket(buf, buf.length, InetAddress.getByName(getGroupAddress()), getGroupPort());
    } catch (UnknownHostException ex) {
        throw new MultiCastResourceBeaconException("Error creating datagram.", ex);
    }
    try {
        s.send(pack);
    } catch (IOException ex) {
        throw new MultiCastResourceBeaconException("Error sending message.", ex);
    }
    s.close();
}

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From source file:org.nebulaframework.discovery.multicast.MulticastDiscovery.java

/**
 * Responds  to a Multicast Discovery Request by publishing
 * the IP Address of Service into response channel. 
 *///from w w  w  .  j av a 2 s  . c o m
protected static void doRespond() {

    // Only allowed for ClusterManagers
    if (!Grid.isClusterManager()) {
        throw new UnsupportedOperationException(
                "Multicast Discovery Service can be enabled only for ClusterManagers");
    }

    try {
        // Get Broker Service URL
        String serviceUrl = ClusterManager.getInstance().getClusterInfo().getServiceUrl();

        byte[] hostInfo = NetUtils.getHostInfoAsBytes(serviceUrl);

        // Create Response Packet
        DatagramPacket response = new DatagramPacket(hostInfo, hostInfo.length, SERVICE_RESPONSE_IP,
                SERVICE_PORT);

        // Create Multicast Socket
        MulticastSocket resSock = new MulticastSocket();

        // Send response
        resSock.send(response);

        log.debug("[MulticastDiscovery] Responded Discovery Request");
    } catch (Exception e) {
        log.error("[MulticastDiscovery] Service Failed to Reply", e);
    }

}

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From source file:com.blueshift.mvpremote.MVPremoteActivity.java

public void onButtonPressed(View v) {
    byte[] b = new byte[3];
    byte val = 0;

    b[0] = 0x00;// ww w .  j a va 2 s  .co m

    switch (v.getId()) {
    case R.id.bPageUp:
        val = 11;
        break;
    case R.id.bUp:
        val = 32;
        break;

    case R.id.bGreen:
        val = 46;
        break;
    case R.id.bLeft:
        val = 17;
        break;
    case R.id.bOK:
        val = 37;
        break;
    case R.id.bRight:
        val = 16;
        break;
    case R.id.bPageDown:
        val = 56;
        break;
    case R.id.bDown:
        val = 33;
        break;
    case R.id.bBack:
        val = 41;
        break;
    case R.id.bMute:
        val = 15;
        break;
    case R.id.bBlank:
        val = 12;
        break;
    case R.id.bFull:
        val = 60;
        break;
    case R.id.bRewind:
        val = 50;
        break;
    case R.id.bPlay:
        val = 53;
        break;
    case R.id.bFF:
        val = 52;
        break;
    case R.id.bRec:
        val = 55;
        break;
    case R.id.bStop:
        val = 54;
        break;
    case R.id.bPause:
        val = 48;
        break;
    case R.id.b1:
        val = 1;
        break;
    case R.id.b2:
        val = 2;
        break;
    case R.id.b3:
        val = 3;
        break;
    case R.id.b4:
        val = 4;
        break;
    case R.id.b5:
        val = 5;
        break;
    case R.id.b6:
        val = 6;
        break;
    case R.id.b7:
        val = 7;
        break;
    case R.id.b8:
        val = 8;
        break;
    case R.id.b9:
        val = 9;
        break;
    case R.id.b0:
        val = 0;
        break;
    case R.id.bExit:
        val = 31;
        break;
    case R.id.bMenu:
        val = 13;
        break;
    case R.id.Skip:
        val = 30;
        break;
    case R.id.Replay:
        val = 36;
        break;
    }

    b[1] = (byte) val;

    if (addr == null) {
        Toast.makeText(this, "Invalid Host", Toast.LENGTH_LONG).show();
        return;
    }

    try {
        s.send(new DatagramPacket(b, 2, addr, 16000));
        //         b[0] = 0x10;
        //         Thread.sleep(100);
        //         s.send(new DatagramPacket(b,2, addr, 16000));
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        //      } catch (InterruptedException e) {
        //         // TODO Auto-generated catch block
        //         e.printStackTrace();
    }
}

---

From source file:org.motechproject.metrics.impl.StatsdAgentBackendImpl.java

private boolean doSend(DatagramSocket sock, String stat) {
    if (serverAddr == null) {
        try {/*w w  w  .  j a  v  a  2s . c  om*/
            serverAddr = InetAddress.getByName(serverHost);
        } catch (UnknownHostException e) {
            //log.error(e.getMessage());
            return false;
        }
    }

    try {
        byte[] data = stat.getBytes();
        sock.send(new DatagramPacket(data, data.length, serverAddr, serverPort));
        return true;
    } catch (IOException e) {
        //log.error(String.format("Could not send stat %s to host %s:%d", stat, serverHost, serverPort), e);
    }
    return false;
}

---

From source file:com.googlecode.jmxtrans.model.output.TCollectorUDPWriter.java

/**
 * Send a single metric to TCollector./* www. java  2s .c  om*/
 *
 * @param metricLine - the line containing the metric name, value, and tags for a single metric; excludes the
 *                   "put" keyword expected by OpenTSDB and the trailing newline character.
 */
@Override
protected void sendOutput(String metricLine) throws IOException {
    DatagramPacket packet;
    byte[] data;

    data = metricLine.getBytes("UTF-8");
    packet = new DatagramPacket(data, 0, data.length, this.address);

    this.dgSocket.send(packet);
}

---

From source file:org.rifidi.emulator.reader.alien.heartbeat.HeartbeatController.java

/**
 * Send out a heartbeat/*w ww.  jav  a 2s  .c o m*/
 */
private void broadcast() {
    String retString = "<Alien-RFID-Reader-Heartbeat>\n" + "  <ReaderName>Alien RFID Reader</ReaderName>\n"
            + "  <ReaderType>Alien RFID Tag Reader, Model: ALR-9800(Four Antenna / Multi-Protocol / 915 Mhz)"
            + "</ReaderType>\n" + "  <IPAddress>" + asr.getCommandIP() + "</IPAddress>\n" + "  <CommandPort>"
            + asr.getCommandPort() + "</CommandPort>\n" + "  <HeartbeatTime>" + this.timeInMs / 1000
            + "</HeartbeatTime>\n" + "  <MACAddress>00:00:00:00:00:00</MACAddress>\n"
            + "</Alien-RFID-Reader-Heartbeat>\n";

    try {
        logger.debug("Attempting to send heartbeat...");
        DatagramSocket sock = new DatagramSocket(bindingPort);
        InetAddress ia = InetAddress.getByName(broadcastAddr);
        sock.setBroadcast(true);
        DatagramPacket p = new DatagramPacket(retString.getBytes(), retString.getBytes().length, ia,
                broadcastPort);
        sock.send(p);
        sock.disconnect();
        sock.close();
    } catch (SocketException e) {
        e.printStackTrace();
    } catch (UnknownHostException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

---

From source file:org.mule.test.firewall.FirewallTestCase.java

protected void doTestUdp(InetAddress address, int port) throws Exception {
    try {/* w  ww.ja  v a  2 s . c om*/
        logger.debug("Testing UDP on " + addressToString(address, port));
        DatagramSocket server = openUdpServer(address, port);
        DatagramSocket client = openUdpClient();
        client.send(new DatagramPacket(new byte[] { 1 }, 1, address, port));
        DatagramPacket packet = new DatagramPacket(new byte[1], 1);
        server.receive(packet);
        assertEquals("Failed to send packet via " + addressToString(address, port), 1, packet.getData()[0]);
        client.close();
        server.close();
    } catch (Exception e) {
        logger.error("Error while attempting UDP message on " + addressToString(address, port));
        throw e;
    }
}

---

From source file:com.streamsets.pipeline.stage.origin.udp.TestUDPSource.java

private void doBasicTest(UDPDataFormat dataFormat) throws Exception {
    List<String> ports = NetworkUtils.getRandomPorts(2);
    ParserConfig parserConfig = new ParserConfig();
    parserConfig.put(CHARSET, "UTF-8");
    TUDPSource source = new TUDPSource(ports, parserConfig, dataFormat, 20, 100L);
    SourceRunner runner = new SourceRunner.Builder(TUDPSource.class, source).addOutputLane("lane").build();
    runner.runInit();/*  w w  w.ja  v a  2 s. c  om*/
    try {
        byte[] bytes = null;
        switch (dataFormat) {
        case NETFLOW:
            InputStream is = Thread.currentThread().getContextClassLoader()
                    .getResourceAsStream(TEN_PACKETS_RESOURCE);
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            IOUtils.copy(is, baos);
            is.close();
            baos.close();
            bytes = baos.toByteArray();
            break;
        case SYSLOG:
            bytes = "<34>1 2003-10-11T22:14:15.003Z mymachine.example.com some syslog data"
                    .getBytes(StandardCharsets.UTF_8);
            break;
        default:
            Assert.fail("Unknown data format: " + dataFormat);
        }
        for (String port : ports) {
            DatagramSocket clientSocket = new DatagramSocket();
            InetAddress address = InetAddress.getLoopbackAddress();
            DatagramPacket sendPacket = new DatagramPacket(bytes, bytes.length, address,
                    Integer.parseInt(port));
            clientSocket.send(sendPacket);
            clientSocket.close();
        }
        StageRunner.Output output = runner.runProduce(null, 6);
        Assert.assertTrue(source.produceCalled);
        List<Record> records = output.getRecords().get("lane");
        switch (dataFormat) {
        case NETFLOW:
            Assert.assertEquals(String.valueOf(records), 6, records.size());
            break;
        case SYSLOG:
            Assert.assertEquals(String.valueOf(records), ports.size(), records.size());
            break;
        default:
            Assert.fail("Unknown data format: " + dataFormat);
        }
        output = runner.runProduce(null, 14);
        Assert.assertTrue(source.produceCalled);
        records = output.getRecords().get("lane");
        switch (dataFormat) {
        case NETFLOW:
            Assert.assertEquals(String.valueOf(records), 14, records.size());
            break;
        case SYSLOG:
            Assert.assertEquals(String.valueOf(records), 0, records.size());
            break;
        default:
            Assert.fail("Unknown data format: " + dataFormat);
        }
        output = runner.runProduce(null, 1);
        Assert.assertTrue(source.produceCalled);
        records = output.getRecords().get("lane");
        Assert.assertEquals(String.valueOf(records), 0, records.size());
    } finally {
        runner.runDestroy();
    }
}

---

From source file:com.example.android.toyvpn.ToyVpnService.java

private void UDPtoProxy(ByteBuffer packet) throws IOException {
    //TODO FARE un THREAD??
    final DatagramSocket clientSocket = new DatagramSocket();
    InetAddress IPAddress = InetAddress.getByName("localhost");
    //send Pkt to Proxy
    DatagramPacket sendPacket = new DatagramPacket(packet.array(), packet.array().length, IPAddress,
            mServerPort);// ww w  .  j a  v  a 2 s .com
    clientSocket.send(sendPacket);
}

---

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