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:org.rifidi.edge.adapter.csl.util.CslRfidTagServer.java

private boolean setMode(ReaderMode mode) {
    try {//from   ww  w  .java 2s. co m

        InetAddress IPInet = InetAddress.getByName(this.IPAddress);

        // Set low-level API mode
        String cmd = "80" + byteArrayToHexString(IPInet.getAddress(), IPInet.getAddress().length)
                + (mode == ReaderMode.lowLevel ? "000C" : "000D");
        logger.info("Set low-level API with command 0x" + cmd.toString());

        DatagramPacket sendPacket = new DatagramPacket(hexStringToByteArray(cmd),
                hexStringToByteArray(cmd).length, IPInet, 3041);
        byte[] receiveData = new byte[4];
        DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
        clientSocket.send(sendPacket);
        clientSocket.setSoTimeout(2000);
        clientSocket.receive(receivePacket);
        logger.info("Return: " + byteArrayToHexString(receivePacket.getData(), receivePacket.getData().length));

        if (byteArrayToHexString(receivePacket.getData(), receivePacket.getData().length).startsWith("810100"))
            return true;
        else
            return false;
    } catch (UnknownHostException e) {
        return false;
    } catch (IOException e) {
        return false;
    }
}

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From source file:org.rifidi.edge.adapter.csl.util.CslRfidTagServer.java

private ReaderMode checkMode() {
    try {/*  w  w w.  j a  va2  s. com*/

        InetAddress IPInet = InetAddress.getByName(this.IPAddress);

        // Set low-level API mode
        String cmd = "80" + byteArrayToHexString(IPInet.getAddress(), IPInet.getAddress().length) + "000E";
        logger.info("Check mode with command 0x" + cmd.toString());

        DatagramPacket sendPacket = new DatagramPacket(hexStringToByteArray(cmd),
                hexStringToByteArray(cmd).length, IPInet, 3041);
        byte[] receiveData = new byte[5];
        DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
        clientSocket.send(sendPacket);
        clientSocket.setSoTimeout(2000);
        clientSocket.receive(receivePacket);
        logger.info(String.format(
                "Return: " + byteArrayToHexString(receivePacket.getData(), receivePacket.getData().length)));

        if (byteArrayToHexString(receivePacket.getData(), receivePacket.getData().length)
                .startsWith("8101010E00"))
            return ReaderMode.highLevel;
        else if (byteArrayToHexString(receivePacket.getData(), receivePacket.getData().length)
                .startsWith("8101010E01"))
            return ReaderMode.lowLevel;
        else
            return null;
    } catch (UnknownHostException e) {
        return null;
    } catch (IOException e) {
        return null;
    }
}

---

From source file:org.tinymediamanager.core.Utils.java

/**
 * Sends a wake-on-lan packet for specified MAC address across subnet
 * //from  w ww . jav  a  2 s .c  om
 * @param macAddr
 *          the mac address to 'wake up'
 */
public static final void sendWakeOnLanPacket(String macAddr) {
    // Broadcast IP address
    final String IP = "255.255.255.255";
    final int port = 7;

    try {
        final byte[] MACBYTE = new byte[6];
        final String[] hex = macAddr.split("(\\:|\\-)");

        for (int i = 0; i < 6; i++) {
            MACBYTE[i] = (byte) Integer.parseInt(hex[i], 16);
        }
        final byte[] bytes = new byte[6 + 16 * MACBYTE.length];
        for (int i = 0; i < 6; i++) {
            bytes[i] = (byte) 0xff;
        }
        for (int i = 6; i < bytes.length; i += MACBYTE.length) {
            System.arraycopy(MACBYTE, 0, bytes, i, MACBYTE.length);
        }

        // Send UDP packet here
        final InetAddress address = InetAddress.getByName(IP);
        final DatagramPacket packet = new DatagramPacket(bytes, bytes.length, address, port);
        final DatagramSocket socket = new DatagramSocket();
        socket.send(packet);
        socket.close();

        LOGGER.info("Sent WOL packet to " + macAddr);
    } catch (final Exception e) {
        LOGGER.error("Error sending WOL packet to " + macAddr, e);
    }
}

---

From source file:serverTools.java

private String callOvnmanager(String node, String action) {
    String result = "";
    DatagramSocket socket = null;
    int serverPort = 9999;
    DatagramPacket packet2Send;/*  w w  w.ja  va 2  s  .  c  om*/
    DatagramPacket receivedPacket;
    InetAddress theServerAddress;
    byte[] outBuffer;
    byte[] inBuffer;
    //inBuffer = new byte[8192];
    //outBuffer = new byte[8192];
    inBuffer = new byte[65536];
    outBuffer = new byte[8192];

    try {
        HttpSession session = RuntimeAccess.getInstance().getSession();
        String sessionUser = (String) session.getAttribute("User");
        if (sessionUser == null) {
            sessionUser = "administrator";
        }

        JSONObject joAction = new JSONObject(action);
        JSONObject joCmd = new JSONObject();
        joCmd.put("sender", sessionUser);
        joCmd.put("target", "NODE");
        joCmd.put("node", node);
        joCmd.put("action", joAction);
        String output = joCmd.toString();

        socket = new DatagramSocket();
        // set timeout
        String actionName = joAction.get("name").toString();
        if (actionName.equals("add")) {
            socket.setSoTimeout(90000);
        } else if (actionName.equals("connect")) {
            socket.setSoTimeout(60000);
        } else {
            socket.setSoTimeout(60000);
        }
        InetAddress serverInet = InetAddress.getByName("localhost");
        socket.connect(serverInet, serverPort);
        outBuffer = output.getBytes();
        packet2Send = new DatagramPacket(outBuffer, outBuffer.length, serverInet, serverPort);
        receivedPacket = new DatagramPacket(inBuffer, inBuffer.length);

        try {
            // send the data
            socket.send(packet2Send);
            // receive reply            
            socket.receive(receivedPacket);
            // the server reply is...
            result = new String(receivedPacket.getData(), 0, receivedPacket.getLength());
            session.setAttribute("LastActive", System.currentTimeMillis());
        } catch (Exception excep) {
            String msg = excep.getMessage();
            //String msg = excep.toString();
            joCmd.remove("action");
            joAction.put("result", "Error:" + msg);
            joCmd.put("action", joAction);
            result = joCmd.toString();
        }
        socket.close();

    } catch (Exception e) {
        log(ERROR, "callOvnmanager", e);
        return e.toString();
    }
    return result;
}

---

From source file:vmTools.java

private String callOvnmanager(String node, String action) {
    String result = "";
    DatagramSocket socket = null;
    int serverPort = 9999;
    DatagramPacket packet2Send;// w  ww . j av a2  s  .  com
    DatagramPacket receivedPacket;
    InetAddress theServerAddress;
    byte[] outBuffer;
    byte[] inBuffer;
    inBuffer = new byte[65536];
    outBuffer = new byte[8192];
    /*
    if (this.user == null) {
    this.user = "admin";
    }*/

    try {
        HttpSession session = RuntimeAccess.getInstance().getSession();

        String sessionUser = (String) session.getAttribute("User");
        if (sessionUser == null) {
            sessionUser = "administrator";
        }

        JSONObject joCmd = new JSONObject();
        JSONObject joAction = new JSONObject(action);
        joCmd.put("sender", sessionUser);
        joCmd.put("target", "VM");
        joCmd.put("node", node);
        joCmd.put("action", joAction);
        String output = joCmd.toString();

        socket = new DatagramSocket();
        String actionName = joAction.get("name").toString();
        /*if (actionName.equals("migrate")) {
        socket.setSoTimeout(600000);
        } else {
        socket.setSoTimeout(60000);
        }*/
        socket.setSoTimeout(60000);

        InetAddress serverInet = InetAddress.getByName("localhost");
        socket.connect(serverInet, serverPort);
        outBuffer = output.getBytes();
        packet2Send = new DatagramPacket(outBuffer, outBuffer.length, serverInet, serverPort);

        try {
            // send the data
            socket.send(packet2Send);
            receivedPacket = new DatagramPacket(inBuffer, inBuffer.length);
            socket.receive(receivedPacket);
            // the server response is...
            result = new String(receivedPacket.getData(), 0, receivedPacket.getLength());
            session.setAttribute("LastActive", System.currentTimeMillis());
        } catch (Exception excep) {
            String msg = excep.getMessage();
            //String msg = excep.toString();
            joCmd.remove("action");
            joAction.put("result", "Error:" + msg);
            joCmd.put("action", joAction);
            result = joCmd.toString();
        }
        socket.close();

    } catch (Exception e) {
        log(ERROR, "callOvnmanager", e);
        return e.toString();
    }
    return result;
}

---

From source file:vmXmlFile.java

private String callOvnmanager(String node, String action) {
    String result = "";
    DatagramSocket socket = null;
    int serverPort = 9999;
    DatagramPacket packet2Send;//from   w  w w .  j  a va 2 s. c o  m
    DatagramPacket receivedPacket;
    InetAddress theServerAddress;
    byte[] outBuffer;
    byte[] inBuffer;
    inBuffer = new byte[65536];
    outBuffer = new byte[8192];

    try {
        HttpSession session = RuntimeAccess.getInstance().getSession();
        String sessionUser = (String) session.getAttribute("User");
        if (sessionUser == null) {
            sessionUser = "administrator";
        }
        JSONObject joCmd = new JSONObject();
        JSONObject joAction = new JSONObject(action);
        joCmd.put("sender", sessionUser);
        joCmd.put("target", "VM");
        joCmd.put("node", node);
        joCmd.put("action", joAction);
        String output = joCmd.toString();

        socket = new DatagramSocket();
        InetAddress serverInet = InetAddress.getByName("localhost");
        socket.connect(serverInet, serverPort);
        outBuffer = output.getBytes();
        packet2Send = new DatagramPacket(outBuffer, outBuffer.length, serverInet, serverPort);
        // send the data
        socket.send(packet2Send);

        receivedPacket = new DatagramPacket(inBuffer, inBuffer.length);
        socket.receive(receivedPacket);

        // the server response is...
        result = new String(receivedPacket.getData(), 0, receivedPacket.getLength());
        session.setAttribute("LastActive", System.currentTimeMillis());
        socket.close();

    } catch (Exception e) {
        log(ERROR, "callOvnmanager", e);
        return e.toString();
    }
    return result;
}

---

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