1 files changed, 101 insertions, 0 deletions
diff --git a/org/apache/commons/net/echo/EchoUDPClient.java b/org/apache/commons/net/echo/EchoUDPClient.java
new file mode 100644
index 0000000..70a4898
--- /dev/null
+++ b/org/apache/commons/net/echo/EchoUDPClient.java
@@ -0,0 +1,101 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.commons.net.echo;
+
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.InetAddress;
+
+import org.apache.commons.net.discard.DiscardUDPClient;
+
+/***
+ * 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 org.apache.commons.net.DatagramSocketClient#open  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 org.apache.commons.net.DatagramSocketClient#close  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.
+     ***/
+    @Override
+    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> ***/
+    @Override
+    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
+    {
+        __receivePacket.setData(data);
+        __receivePacket.setLength(length);
+        _socket_.receive(__receivePacket);
+        return __receivePacket.getLength();
+    }
+
+    /*** Same as <code> receive(data, data.length)</code> ***/
+    public int receive(byte[] data) throws IOException
+    {
+        return receive(data, data.length);
+    }
+
+}
+