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org.apache.commons.net.DiscardUDPClient |
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1 | /* |
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2 | * Copyright 2001-2005 The Apache Software Foundation |
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3 | * |
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4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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5 | * you may not use this file except in compliance with the License. |
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6 | * You may obtain a copy of the License at |
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7 | * |
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8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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9 | * |
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10 | * Unless required by applicable law or agreed to in writing, software |
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11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 | * See the License for the specific language governing permissions and |
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14 | * limitations under the License. |
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15 | */ |
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16 | package org.apache.commons.net; |
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17 | ||
18 | import java.io.IOException; |
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19 | import java.net.DatagramPacket; |
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20 | import java.net.InetAddress; |
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21 | ||
22 | /*** |
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23 | * The DiscardUDPClient class is a UDP implementation of a client for the |
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24 | * Discard protocol described in RFC 863. To use the class, |
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25 | * just open a local UDP port |
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26 | * with {@link org.apache.commons.net.DatagramSocketClient#open open } |
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27 | * and call {@link #send send } to send datagrams to the server |
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28 | * After you're done sending discard data, call |
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29 | * {@link org.apache.commons.net.DatagramSocketClient#close close() } |
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30 | * to clean up properly. |
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31 | * <p> |
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32 | * <p> |
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33 | * @author Daniel F. Savarese |
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34 | * @see DiscardTCPClient |
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35 | ***/ |
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36 | ||
37 | public class DiscardUDPClient extends DatagramSocketClient |
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38 | { |
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39 | /*** The default discard port. It is set to 9 according to RFC 863. ***/ |
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40 | public static final int DEFAULT_PORT = 9; |
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41 | ||
42 | DatagramPacket _sendPacket; |
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43 | ||
44 | public DiscardUDPClient() |
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45 | 0 | { |
46 | 0 | _sendPacket = new DatagramPacket(class="keyword">new byte[0], 0); |
47 | 0 | } |
48 | ||
49 | ||
50 | /*** |
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51 | * Sends the specified data to the specified server at the specified port. |
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52 | * <p> |
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53 | * @param data The discard data to send. |
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54 | * @param length The length of the data to send. Should be less than |
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55 | * or equal to the length of the data byte array. |
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56 | * @param host The address of the server. |
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57 | * @param port The service port. |
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58 | * @exception IOException If an error occurs during the datagram send |
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59 | * operation. |
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60 | ***/ |
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61 | public void send(byte[] data, int length, InetAddress host, class="keyword">int port) |
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62 | throws IOException |
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63 | { |
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64 | 0 | _sendPacket.setData(data); |
65 | 0 | _sendPacket.setLength(length); |
66 | 0 | _sendPacket.setAddress(host); |
67 | 0 | _sendPacket.setPort(port); |
68 | 0 | _socket_.send(_sendPacket); |
69 | 0 | } |
70 | ||
71 | ||
72 | /*** |
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73 | * Same as |
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74 | * <code>send(data, length, host. DiscardUDPClient.DEFAULT_PORT)</code>. |
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75 | ***/ |
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76 | public void send(byte[] data, int length, InetAddress host) |
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77 | throws IOException |
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78 | { |
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79 | 0 | send(data, length, host, DEFAULT_PORT); |
80 | 0 | } |
81 | ||
82 | ||
83 | /*** |
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84 | * Same as |
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85 | * <code>send(data, data.length, host. DiscardUDPClient.DEFAULT_PORT)</code>. |
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86 | ***/ |
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87 | public void send(byte[] data, InetAddress host) throws IOException |
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88 | { |
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89 | 0 | send(data, data.length, host, DEFAULT_PORT); |
90 | 0 | } |
91 | ||
92 | } |
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93 |
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