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:Main.java

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

        int port = 80;

        DatagramSocket ds = new DatagramSocket(port);

        byte buffer[] = new byte[BUFSIZE];

        while (true) {

            DatagramPacket dp = new DatagramPacket(buffer, buffer.length);
            // Receive data
            ds.receive(dp);
            // Display address from the datagram packet
            InetAddress ia = dp.getAddress();
            System.out.println(ia);

            System.out.println(dp.getSocketAddress());
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

---

From source file:Main.java

public static void main(String args[]) {
    try {/* w  w w  .j a va 2 s  .com*/

        int port = 80;

        DatagramSocket ds = new DatagramSocket(port);

        byte buffer[] = new byte[BUFSIZE];

        while (true) {

            DatagramPacket dp = new DatagramPacket(buffer, buffer.length);
            // Receive data
            ds.receive(dp);
            // Display address from the datagram packet
            InetAddress ia = dp.getAddress();
            System.out.println(ia);

            System.out.println(dp.getOffset());
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

---

From source file:Main.java

public static void main(String[] args) throws Exception {
    int mcPort = 12345;
    String mcIPStr = "230.1.1.1";
    DatagramSocket udpSocket = new DatagramSocket();

    InetAddress mcIPAddress = InetAddress.getByName(mcIPStr);
    byte[] msg = "Hello".getBytes();
    DatagramPacket packet = new DatagramPacket(msg, msg.length);
    packet.setAddress(mcIPAddress);/*from ww  w .  ja  v  a  2 s.  com*/
    packet.setPort(mcPort);
    udpSocket.send(packet);

    System.out.println("Sent a  multicast message.");
    System.out.println("Exiting application");
    udpSocket.close();
}

---

From source file:Main.java

public static void main(String args[]) {
    try {/*from   w  w  w  .  j  a va 2  s.co m*/

        int port = 80;

        DatagramSocket ds = new DatagramSocket(port);

        byte buffer[] = new byte[BUFSIZE];

        while (true) {

            DatagramPacket dp = new DatagramPacket(buffer, buffer.length);
            // Receive data
            ds.receive(dp);
            // Display address from the datagram packet
            InetAddress ia = dp.getAddress();
            System.out.println(ia);

            buffer = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 };

            dp.setData(buffer, 2, 5);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

---

From source file:Main.java

public static void main(String args[]) throws IOException {
    DatagramSocket socket = new DatagramSocket(DAYTIME_PORT);
    while (true) {
        byte buffer[] = new byte[256];
        DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
        socket.receive(packet);//from w w w .  j  ava  2  s. c  o  m
        String date = new Date().toString();
        buffer = date.getBytes();
        // Get response address/port for client from packet
        InetAddress address = packet.getAddress();
        int port = packet.getPort();
        packet = new DatagramPacket(buffer, buffer.length, address, port);
        socket.send(packet);
    }
}

---

From source file:ChatClient.java

  public static void main(String[] args) throws Exception {
  DatagramSocket s = new DatagramSocket();
  byte[] buf = new byte[1000];
  DatagramPacket dp = new DatagramPacket(buf, buf.length);

  InetAddress hostAddress = InetAddress.getByName("localhost");
  while (true) {//from   ww  w  .ja va2  s.  co m
    BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
    String outMessage = stdin.readLine();

    if (outMessage.equals("bye"))
      break;
    String outString = "Client say: " + outMessage;
    buf = outString.getBytes();

    DatagramPacket out = new DatagramPacket(buf, buf.length, hostAddress, 9999);
    s.send(out);

    s.receive(dp);
    String rcvd = "rcvd from " + dp.getAddress() + ", " + dp.getPort() + ": "
        + new String(dp.getData(), 0, dp.getLength());
    System.out.println(rcvd);
  }
}

---

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    int port = 0;
    InetAddress group = InetAddress.getByName("127.0.0.1");

    MulticastSocket ms = new MulticastSocket(port);
    ms.joinGroup(group);/*from ww w .j av  a 2s  .  c o m*/

    byte[] buffer = new byte[8192];
    while (true) {
        DatagramPacket dp = new DatagramPacket(buffer, buffer.length);
        ms.receive(dp);
        String s = new String(dp.getData());
        System.out.println(s);
    }
    // ms.leaveGroup(group);
    // ms.close();

}

---

From source file:Main.java

public static void main(String args[]) {
    try {/*w w  w. j  a v a  2  s  .  c  o m*/

        int port = 80;

        DatagramSocket ds = new DatagramSocket(port);

        byte buffer[] = new byte[BUFSIZE];

        while (true) {

            DatagramPacket dp = new DatagramPacket(buffer, buffer.length);
            // Receive data
            ds.receive(dp);
            // Display address from the datagram packet
            InetAddress ia = dp.getAddress();
            System.out.println(ia);

            dp.setData(buffer);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

---

From source file:Main.java

public static void main(String args[]) {
    try {/*from  w ww  . j a va  2 s . c o  m*/

        int port = 80;

        DatagramSocket ds = new DatagramSocket(port);

        byte buffer[] = new byte[BUFSIZE];

        while (true) {

            DatagramPacket dp = new DatagramPacket(buffer, buffer.length);
            // Receive data
            ds.receive(dp);
            // Display address from the datagram packet
            InetAddress ia = dp.getAddress();
            System.out.println(ia);

            dp.setSocketAddress(InetSocketAddress.createUnresolved("google.com", 8080));
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

---

From source file:MulticastSniffer.java

public static void main(String[] args) {
    InetAddress ia = null;//  w  ww  .j  a v a  2  s  .co m
    byte[] buffer = new byte[65535];
    DatagramPacket dp = new DatagramPacket(buffer, buffer.length);
    int port = 0;

    // read the address from the command line
    try {
        try {
            ia = InetAddress.getByName(args[0]);
        } catch (UnknownHostException e) {
            System.err.println(e);
        }
        port = Integer.parseInt(args[1]);
    } catch (Exception e) {
        System.err.println(e);
        System.err.println("Usage: java MulticastSniffer mcast-addr port");
        System.exit(1);
    }
    System.out.println("About to join " + ia);

    try {
        MulticastSocket ms = new MulticastSocket(port);
        ms.joinGroup(ia);
        while (true) {
            System.out.println("About to receive...");
            ms.receive(dp);
            String s = new String(dp.getData(), 0, 0, dp.getLength());
            System.out.println(s);
        }
    } catch (SocketException se) {
        System.err.println(se);
    } catch (IOException ie) {
        System.err.println(ie);
    }
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• »