Examples of java.net.DatagramSocket.connect()

java.net.DatagramSocket.connect()
Connects the socket to a remote address for this socket. When a socket is connected to a remote address, packets may only be sent to or received from that address. By default a datagram socket is not connected.
If the remote destination to which the socket is connected does not exist, or is otherwise unreachable, and if an ICMP destination unreachable packet has been received for that address, then a subsequent call to send or receive may throw a PortUnreachableException. Note, there is no guarantee that the exception will be thrown.
A caller's permission to send and receive datagrams to a given host and port are checked at connect time. When a socket is connected, receive and send will not perform any security checks on incoming and outgoing packets, other than matching the packet's and the socket's address and port. On a send operation, if the packet's address is set and the packet's address and the socket's address do not match, an IllegalArgumentException will be thrown. A socket connected to a multicast address may only be used to send packets. @param address the remote address for the socket @param port the remote port for the socket. @exception IllegalArgumentException if the address is null,or the port is out of range. @exception SecurityException if the caller is not allowed tosend datagrams to and receive datagrams from the address and port. @see #disconnect @see #send @see #receive

      theSocket.connect(new InetSocketAddress(addr, port));
      assertTrue("Socket indicated  not connected when it should be",
          theSocket.isConnected());


      // reconnect the socket and make sure we get the right answer
      theSocket.connect(new InetSocketAddress(addr, ports[2]));
      assertTrue("Socket indicated  not connected when it should be",
          theSocket.isConnected());


      // now disconnect the socket and make sure we get the right answer
      theSocket.disconnect();

View Full Code Here

          theSocket.isConnected());
      theSocket.close();


      // now check behavior when socket is closed when connected
      theSocket = new DatagramSocket(ports[3]);
      theSocket.connect(new InetSocketAddress(addr, port));
      theSocket.close();
      assertTrue("Socket indicated  not connected when it should be",
          theSocket.isConnected());
    } catch (Exception e) {
      fail("Got exception during isConnected tests" + e.toString());

View Full Code Here

      int[] ports = Support_PortManager.getNextPortsForUDP(3);
      int sport = ports[0];
      int portNumber = ports[1];
      DatagramSocket s = new DatagramSocket(new InetSocketAddress(
          InetAddress.getLocalHost(), portNumber));
      s.connect(new InetSocketAddress(InetAddress.getLocalHost(), sport));
      assertTrue("Returned incorrect InetSocketAddress(1):"
          + s.getLocalSocketAddress().toString(), s
          .getRemoteSocketAddress().equals(
              new InetSocketAddress(InetAddress.getLocalHost(),
                  sport)));

View Full Code Here

          "Returned incorrect InetSocketAddress -unconnected socket:"
              + "Expected: NULL", theSocket
              .getRemoteSocketAddress());


      // now connect and validate we get the right answer
      theSocket.connect(new InetSocketAddress(InetAddress.getLocalHost(),
          sport));
      assertTrue("Returned incorrect InetSocketAddress(2):"
          + theSocket.getRemoteSocketAddress().toString(), theSocket
          .getRemoteSocketAddress().equals(
              new InetSocketAddress(InetAddress.getLocalHost(),

View Full Code Here

      byte theBytes[] = { -1, -1, -1, -1 };


      // validate we cannot connect to the broadcast address when
      // setBroadcast is false
      try {
        theSocket.connect(new InetSocketAddress(InetAddress
            .getByAddress(theBytes), ports[1]));
        assertFalse(
            "No exception when connecting to broadcast address with setBroadcast(false)",
            theSocket.getBroadcast());
      } catch (Exception ex) {

View Full Code Here

      }


      // now validate that we can connect to the broadcast address when
      // setBroadcast is true
      theSocket.setBroadcast(true);
      theSocket
          .connect(new InetSocketAddress(InetAddress
              .getByAddress(theBytes), ports[2]));
      ensureExceptionThrownIfOptionIsUnsupportedOnOS(SO_BROADCAST);
    } catch (Exception e) {
      handleException(e, SO_BROADCAST);

View Full Code Here

      // Create a connected datagram socket to test
      // PlainDatagramSocketImpl.peek()
      InetAddress localHost = InetAddress.getLocalHost();
      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);

View Full Code Here

    // send a dgram to a server that is not running and then do a recv
    try {
      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);

View Full Code Here

      DatagramSocket theSocket = new DatagramSocket(portNumber);
      assertEquals("Expected -1 for remote port as not connected",
          -1, theSocket.getPort());


      // now connect the socket and validate that we get the right port
      theSocket.connect(InetAddress.getLocalHost(), portNumber);
      assertTrue("getPort returned wrong value:" + theSocket.getPort()
          + ":Expected:" + portNumber,
          theSocket.getPort() == portNumber);
    } catch (Exception e) {
      fail("unexpected exception during getPort test : " + e.getMessage());

View Full Code Here

        client.close();
    }


    public void testUDP() throws Exception {
        DatagramSocket client = new DatagramSocket();
        client.connect(new InetSocketAddress("127.0.0.1", port));
        client.setSoTimeout(500);


        byte[] writeBuf = new byte[16];
        byte[] readBuf = new byte[writeBuf.length];
        DatagramPacket wp = new DatagramPacket(writeBuf, writeBuf.length);

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.