Example usage for java.net DatagramSocket bind

Introduction

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

Prototype

public synchronized void bind(SocketAddress addr) throws SocketException 

Source Link

Document

Binds this DatagramSocket to a specific address and port.

Usage

From source file:UDPTimeServer.java

public static void main(String[] args) throws IOException {

    int port = 37;

    ByteBuffer in = ByteBuffer.allocate(8192);
    ByteBuffer out = ByteBuffer.allocate(8);
    out.order(ByteOrder.BIG_ENDIAN);
    SocketAddress address = new InetSocketAddress(port);
    DatagramChannel channel = DatagramChannel.open();
    DatagramSocket socket = channel.socket();
    socket.bind(address);
    System.err.println("bound to " + address);
    while (true) {
        try {//from   w  w  w . j a  v a  2 s . co  m
            in.clear();
            SocketAddress client = channel.receive(in);
            System.err.println(client);
            long secondsSince1970 = System.currentTimeMillis();
            out.clear();
            out.putLong(secondsSince1970);
            out.flip();

            out.position(4);
            channel.send(out, client);
        } catch (Exception ex) {
            System.err.println(ex);
        }
    }
}

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From source file:MainClass.java

public static void main(String[] args) throws IOException {

    DatagramChannel channel = DatagramChannel.open();
    SocketAddress address = new InetSocketAddress(0);
    DatagramSocket socket = channel.socket();
    socket.bind(address);

    SocketAddress server = new InetSocketAddress("time-a.nist.gov", 37);
    channel.connect(server);/*  ww  w  . j a  v a2  s .  c  o m*/

    ByteBuffer buffer = ByteBuffer.allocate(8);
    buffer.order(ByteOrder.BIG_ENDIAN);
    // send a byte of data to the server
    buffer.put((byte) 0);
    buffer.flip();
    channel.write(buffer);

    // get the buffer ready to receive data
    buffer.clear();
    // fill the first four bytes with zeros
    buffer.putInt(0);
    channel.read(buffer);
    buffer.flip();

    // convert seconds since 1900 to a java.util.Date
    long secondsSince1900 = buffer.getLong();
    long differenceBetweenEpochs = 2208988800L;
    long secondsSince1970 = secondsSince1900 - differenceBetweenEpochs;
    long msSince1970 = secondsSince1970 * 1000;
    Date time = new Date(msSince1970);

    System.out.println(time);
}

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From source file:MainClass.java

public static void main(String[] args) throws Exception {
    DatagramChannel channel = DatagramChannel.open();
    DatagramSocket socket = channel.socket();
    SocketAddress address = new InetSocketAddress(9999);
    socket.bind(address);
    ByteBuffer buffer = ByteBuffer.allocateDirect(65507);
    while (true) {
        SocketAddress client = channel.receive(buffer);
        buffer.flip();/* ww  w  .  j a  va 2s  .  co  m*/
        channel.send(buffer, client);
        buffer.clear();
    }
}

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From source file:UDPTimeClient.java

public static void main(String[] args) throws Exception {

    DatagramChannel channel = DatagramChannel.open();
    // port 0 selects any available port
    SocketAddress address = new InetSocketAddress(0);
    DatagramSocket socket = channel.socket();
    socket.setSoTimeout(5000);//from  w w  w . j a v a 2 s .c  o  m
    socket.bind(address);

    SocketAddress server = new InetSocketAddress("time.nist.gov", 37);
    ByteBuffer buffer = ByteBuffer.allocate(8192);
    // time protocol always uses big-endian order
    buffer.order(ByteOrder.BIG_ENDIAN);
    // Must put at least one byte of data in the buffer;
    // it doesn't matter what it is.
    buffer.put((byte) 65);
    buffer.flip();

    channel.send(buffer, server);

    buffer.clear();
    buffer.put((byte) 0).put((byte) 0).put((byte) 0).put((byte) 0);
    channel.receive(buffer);
    buffer.flip();
    long secondsSince1970 = buffer.getLong();

    System.out.println(secondsSince1970);
    channel.close();

}

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From source file:Main.java

public static void main(String args[]) {
    try {//from ww  w. ja  v  a  2s .c om

        InetAddress ia = InetAddress.getByName("www.java2s.com");

        DatagramSocket ds = new DatagramSocket();

        byte buffer[] = "hello".getBytes();
        DatagramPacket dp = new DatagramPacket(buffer, buffer.length, ia, 80);
        ds.bind(InetSocketAddress.createUnresolved("google.com", 8080));
        ds.send(dp);
        ds.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

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From source file:org.limewire.mojito.io.MessageDispatcherImpl.java

@Override
public void bind(SocketAddress address) throws IOException {
    synchronized (lock) {
        if (isBound()) {
            throw new IOException("DatagramChannel is already bound");
        }/* w  w  w .  j ava  2 s . co  m*/

        channel = DatagramChannel.open();
        channel.configureBlocking(false);

        selector = Selector.open();
        channel.register(selector, SelectionKey.OP_READ);

        DatagramSocket socket = channel.socket();
        socket.setReuseAddress(false);
        socket.setReceiveBufferSize(RECEIVE_BUFFER_SIZE);
        socket.setSendBufferSize(SEND_BUFFER_SIZE);

        socket.bind(address);
    }
}

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From source file:org.openacs.HostsBean.java

public void RequestConnectionUDP(String url, String user, String pass) throws Exception {
    DatagramSocket s = new DatagramSocket(null);
    s.setReuseAddress(true);//from   w  w w  .j  a  v a 2  s . co  m
    s.bind(new InetSocketAddress(Application.getSTUNport()));
    String ts = Long.toString(Calendar.getInstance().getTimeInMillis());
    String id = ts;
    Random rnd = new Random();
    byte[] nonceArray = new byte[16];
    rnd.nextBytes(nonceArray);

    String cn = cvtHex.cvtHex(nonceArray);
    url = url.substring(6);
    String[] u = url.split(":");

    SecretKeySpec signingKey = new SecretKeySpec(pass.getBytes(), HMAC_SHA1_ALGORITHM);
    Mac mac = Mac.getInstance(HMAC_SHA1_ALGORITHM);
    mac.init(signingKey);
    String data = ts + id + user + cn;
    byte[] rawHmac = mac.doFinal(data.getBytes());
    String signature = cvtHex.cvtHex(rawHmac);
    String req = "GET http://" + url + "?ts=" + ts + "&id=" + id + "&un=" + user + "&cn=" + cn + "&sig="
            + signature + " HTTP/1.1\r\n\r\n";

    byte[] breq = req.getBytes();
    DatagramPacket packet = new DatagramPacket(breq, breq.length);
    packet.setAddress(InetAddress.getByName(u[0]));
    packet.setPort(Integer.parseInt(u[1]));
    s.send(packet);
}

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From source file:org.rifidi.emulator.io.comm.ip.udp.UDPOffCommunicationPowerState.java

/** 
 * Calls the method in the superclass and kicks off the threads making 
 *//*from  w ww.  j  a v a  2s  . c o m*/
@Override
public void turnOn(PowerControllable pcObject) {
    logger.debug("Turning on...");

    /* Invoke buffered handlers. */
    super.turnOn(pcObject);

    /* Cast the passed PowerControllable to a UDPCommmunication. */
    UDPCommunication curUDPComm = (UDPCommunication) pcObject;

    /* Get the Datagram object from the communication object. */
    DatagramSocket tempSocket = curUDPComm.getDatagramSocket();

    /* bind the udp communication object to the local address
     * this is the from address in a message */
    try {
        tempSocket.bind(new InetSocketAddress(curUDPComm.getLocalIPAddress(), curUDPComm.getLocalPort()));
    } catch (IOException e) {
        logger.warn(e.getMessage());
    }

    /* If we are only doing output then we do not need an incoming
     * message handler for udp */
    if (!curUDPComm.isOutputOnly()) {
        new Thread(new UDPCommunicationIncomingMessageHandler(curUDPComm), "Incoming Message Handler").start();
    }

    /* We will always have an outgoing UDP message handler to send
     * udp messages to the remote address */
    new Thread(new UDPCommunicationOutgoingMessageHandler(curUDPComm), "Outgoing Message Handler").start();

    /* Change to the on state */
    curUDPComm.changePowerState(UDPOnCommunicationPowerState.getInstance());

}

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