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What this is

This file is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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The source code

 * Copyright 2001-2004 The Apache Software Foundation
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.

 * The DiscardUDPClient class is a UDP implementation of a client for the
 * Discard protocol described in RFC 863.  To use the class,
 * just open a local UDP port
 * with  open 
 * and call  send  to send datagrams to the server
 * After you're done sending discard data, call
 *  close() 
 * to clean up properly.


* @author Daniel F. Savarese * @see DiscardTCPClient ***/ public class DiscardUDPClient extends DatagramSocketClient { /*** The default discard port. It is set to 9 according to RFC 863. ***/ public static final int DEFAULT_PORT = 9; DatagramPacket _sendPacket; public DiscardUDPClient() { _sendPacket = new DatagramPacket(new byte[0], 0); } /*** * Sends the specified data to the specified server at the specified port. *

* @param data The discard data to send. * @param length The length of the data to send. Should be less than * or equal to the length of the data byte array. * @param host The address of the server. * @param port The service port. * @exception IOException If an error occurs during the datagram send * operation. ***/ public void send(byte[] data, int length, InetAddress host, int port) throws IOException { _sendPacket.setData(data); _sendPacket.setLength(length); _sendPacket.setAddress(host); _sendPacket.setPort(port); _socket_.send(_sendPacket); } /*** * Same as * send(data, length, host. DiscardUDPClient.DEFAULT_PORT). ***/ public void send(byte[] data, int length, InetAddress host) throws IOException { send(data, length, host, DEFAULT_PORT); } /*** * Same as * send(data, data.length, host. DiscardUDPClient.DEFAULT_PORT). ***/ public void send(byte[] data, InetAddress host) throws IOException { send(data, data.length, host, DEFAULT_PORT); } }

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