Examples of java.net.DatagramSocket.send()

java.net.DatagramSocket.send()
Sends a datagram packet from this socket. The DatagramPacket includes information indicating the data to be sent, its length, the IP address of the remote host, and the port number on the remote host.
If there is a security manager, and the socket is not currently connected to a remote address, this method first performs some security checks. First, if p.getAddress().isMulticastAddress() is true, this method calls the security manager's checkMulticast method with p.getAddress() as its argument. If the evaluation of that expression is false, this method instead calls the security manager's checkConnect method with arguments p.getAddress().getHostAddress() and p.getPort(). Each call to a security manager method could result in a SecurityException if the operation is not allowed. @param p the DatagramPacket to be sent. @exception IOException if an I/O error occurs. @exception SecurityException if a security manager exists and its checkMulticast or checkConnect method doesn't allow the send. @exception PortUnreachableException may be thrown if the socket is connectedto a currently unreachable destination. Note, there is no guarantee that the exception will be thrown. @exception java.nio.channels.IllegalBlockingModeException if this socket has an associated channel, and the channel is in non-blocking mode. @see java.net.DatagramPacket @see SecurityManager#checkMulticast(InetAddress) @see SecurityManager#checkConnect @revised 1.4 @spec JSR-51

      ds.connect(new InetSocketAddress(localHost, serverPortNumber));


      byte[] sendBytes = { 'T', 'e', 's', 't', 0 };
      DatagramPacket send = new DatagramPacket(sendBytes,
          sendBytes.length);
      ds.send(send);
      Thread.sleep(1000);
      ds.close();
      assertTrue(
          "Address in packet sent does not match address bound to:"
              + server.rdp.getAddress() + ":"

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          localHost = InetAddress.getLocalHost();
          Thread.sleep(1000);
          DatagramSocket sds = new DatagramSocket(ports[1]);
          DatagramPacket rdp = new DatagramPacket("0123456789"
              .getBytes(), 10, localHost, portNumber);
          sds.send(rdp);
          sds.close();
        } catch (Exception e) {
          System.err.println("host " + localHost + " port "
              + portNumber + " failed to send oversize data: "
              + e);

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      DatagramSocket ds = new DatagramSocket();
      int port = ds.getLocalPort();
      ds.connect(localHost, port);
      DatagramPacket send = new DatagramPacket(new byte[10], 10,
          localHost, port);
      ds.send(send);
      DatagramPacket receive = new DatagramPacket(new byte[20], 20);
      ds.setSoTimeout(2000);
      ds.receive(receive);
      ds.close();
      assertTrue("Wrong size: " + receive.getLength(), receive

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      ds = new java.net.DatagramSocket();
      InetAddress inetAddress = InetAddress.getLocalHost();
      int portNumber = Support_PortManager.getNextPortForUDP();
      ds.connect(inetAddress, portNumber);
      DatagramPacket send = new DatagramPacket(new byte[10], 10);
      ds.send(send);
      DatagramPacket receive = new DatagramPacket(new byte[20], 20);
      ds.setSoTimeout(10000);
      ds.receive(receive);
      ds.close();
      fail(

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          localHost = InetAddress.getLocalHost();
          Thread.sleep(1000);
          DatagramSocket sds = new DatagramSocket(ports[1]);
          DatagramPacket rdp = new DatagramPacket("Test String"
              .getBytes(), 11, localHost, portNumber);
          sds.send(rdp);
          sds.close();
        } catch (Exception e) {
          System.err.println("host " + localHost + " port "
              + portNumber + " failed to send data: " + e);
          e.printStackTrace();

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          localHost = InetAddress.getLocalHost();
          Thread.sleep(1000);
          DatagramSocket sds = new DatagramSocket(ports[1]);
          DatagramPacket rdp = new DatagramPacket("Test String"
              .getBytes(), 11, localHost, portNumber);
          sds.send(rdp);
          sds.close();
        } catch (Exception e) {
          System.err.println("host " + localHost + " port "
              + portNumber + " failed to send data: " + e);
          e.printStackTrace();

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          localHost = InetAddress.getLocalHost();
          Thread.sleep(1000);
          DatagramSocket sds = new DatagramSocket(ports[1]);
          DatagramPacket rdp = new DatagramPacket("0123456789"
              .getBytes(), 10, localHost, portNumber);
          sds.send(rdp);
          sds.close();
        } catch (Exception e) {
          System.err.println("host " + localHost + " port "
              + portNumber + " failed to send oversize data: "
              + e);

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          }
          socket.setSoTimeout(3000);
          DatagramPacket packet = new DatagramPacket(new byte[256],
              256);
          socket.receive(packet);
          socket.send(packet);
          socket.close();
        } catch (IOException e) {
          System.out.println("thread exception: " + e);
          if (socket != null)
            socket.close();

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            lock.wait();
        } catch (InterruptedException e) {
          fail(e.toString());
        }
      }
      socket.send(packet);
      socket.receive(packet);
      socket.close();
      assertTrue("datagram received wrong port: " + packet.getPort(),
          packet.getPort() == port);
    } catch (IOException e) {

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        // regression test for Harmony-1036
        DatagramChannel channel = DatagramChannel.open();
        channel.configureBlocking(false);
        DatagramSocket socket = channel.socket();
        try {
            socket.send(null);
            fail("should throw IllegalBlockingModeException");
        } catch (IllegalBlockingModeException e) {
            // expected
        }
        try {

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