commons-net-1.4.1.jar - Apache Commons Net

commons-net-1.4.1.jar is the JAR file for Apache Commons Net 1.4.1, which implements the client side of many basic Internet protocols.

commons-net-1.4.1.jar is distributed as part of the download file.

JAR File Size and Download Location:

JAR name: commons-net.jar, commons-net-1.4.1.jar
Target JDK version: 1.4
Dependency: None
File name: commons-net-1.4.1.jar
File size: 180792 bytes
Date modified: 03-Dec-2005
Download: Apache Commons Net



 * Copyright 2001-2005 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 EchoUDPClient class is a UDP implementation of a client for the
 * Echo protocol described in RFC 862.  To use the class,
 * just open a local UDP port
 * with {@link  open }
 * and call {@link #send  send } to send datagrams to the server,
 * then call {@link #receive  receive } to receive echoes.
 * After you're done echoing data, call
 * {@link  close() }
 * to clean up properly.
 * <p>
 * <p>
 * @author Daniel F. Savarese
 * @see EchoTCPClient
 * @see DiscardUDPClient

public final class EchoUDPClient extends DiscardUDPClient
    /*** The default echo port.  It is set to 7 according to RFC 862. ***/
    public static final int DEFAULT_PORT = 7;

    private DatagramPacket __receivePacket = new DatagramPacket(new byte[0], 0);

     * Sends the specified data to the specified server at the default echo
     * port.
     * <p>
     * @param data  The echo 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.
     * @exception IOException If an error occurs during the datagram send
     *     operation.
    public void send(byte[] data, int length, InetAddress host)
    throws IOException
        send(data, length, host, DEFAULT_PORT);

    /*** Same as <code> send(data, data.length, host) </code> ***/
    public void send(byte[] data, InetAddress host) throws IOException
        send(data, data.length, host, DEFAULT_PORT);

     * Receives echoed data and returns its length.  The data may be divided
     * up among multiple datagrams, requiring multiple calls to receive.
     * Also, the UDP packets will not necessarily arrive in the same order
     * they were sent.
     * <p>
     * @return  Length of actual data received.
     * @exception IOException If an error occurs while receiving the data.
    public int receive(byte[] data, int length) throws IOException
        return __receivePacket.getLength();

    /*** Same as <code> receive(data, data.length)</code> ***/
    public int receive(byte[] data) throws IOException
        return receive(data, data.length);




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