2 files changed, 176 insertions, 0 deletions
diff --git a/org/apache/commons/net/daytime/DaytimeTCPClient.java b/org/apache/commons/net/daytime/DaytimeTCPClient.java
new file mode 100644
index 0000000..a77c8c1
--- /dev/null
+++ b/org/apache/commons/net/daytime/DaytimeTCPClient.java
@@ -0,0 +1,92 @@
+/*
+ * 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.daytime;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+import org.apache.commons.net.SocketClient;
+
+/***
+ * The DaytimeTCPClient class is a TCP implementation of a client for the
+ * Daytime protocol described in RFC 867.  To use the class, merely
+ * establish a connection with
+ * {@link org.apache.commons.net.SocketClient#connect  connect }
+ * and call {@link #getTime  getTime() } to retrieve the daytime
+ * string, then
+ * call {@link org.apache.commons.net.SocketClient#disconnect  disconnect }
+ * to close the connection properly.
+ * <p>
+ * <p>
+ * @author Daniel F. Savarese
+ * @see DaytimeUDPClient
+ ***/
+
+public final class DaytimeTCPClient extends SocketClient
+{
+    /*** The default daytime port.  It is set to 13 according to RFC 867. ***/
+    public static final int DEFAULT_PORT = 13;
+
+    // Received dates will likely be less than 64 characters.
+    // This is a temporary buffer used while receiving data.
+    private char[] __buffer = new char[64];
+
+    /***
+     * The default DaytimeTCPClient constructor.  It merely sets the default
+     * port to <code> DEFAULT_PORT </code>.
+     ***/
+    public DaytimeTCPClient ()
+    {
+        setDefaultPort(DEFAULT_PORT);
+    }
+
+    /***
+     * Retrieves the time string from the server and returns it.  The
+     * server will have closed the connection at this point, so you should
+     * call
+     * {@link org.apache.commons.net.SocketClient#disconnect  disconnect }
+     * after calling this method.  To retrieve another time, you must
+     * initiate another connection with
+     * {@link org.apache.commons.net.SocketClient#connect  connect }
+     * before calling <code> getTime() </code> again.
+     * <p>
+     * @return The time string retrieved from the server.
+     * @exception IOException  If an error occurs while fetching the time string.
+     ***/
+    public String getTime() throws IOException
+    {
+        int read;
+        StringBuffer result = new StringBuffer(__buffer.length);
+        BufferedReader reader;
+
+        reader = new BufferedReader(new InputStreamReader(_input_));
+
+        while (true)
+        {
+            read = reader.read(__buffer, 0, __buffer.length);
+            if (read <= 0)
+                break;
+            result.append(__buffer, 0, read);
+        }
+
+        return result.toString();
+    }
+
+}
+
diff --git a/org/apache/commons/net/daytime/DaytimeUDPClient.java b/org/apache/commons/net/daytime/DaytimeUDPClient.java
new file mode 100644
index 0000000..64eef9d
--- /dev/null
+++ b/org/apache/commons/net/daytime/DaytimeUDPClient.java
@@ -0,0 +1,84 @@
+/*
+ * 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.daytime;
+
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.InetAddress;
+
+import org.apache.commons.net.DatagramSocketClient;
+
+/***
+ * The DaytimeUDPClient class is a UDP implementation of a client for the
+ * Daytime protocol described in RFC 867.  To use the class, merely
+ * open a local datagram socket with
+ * {@link org.apache.commons.net.DatagramSocketClient#open  open }
+ * and call {@link #getTime  getTime } to retrieve the daytime
+ * string, then
+ * call {@link org.apache.commons.net.DatagramSocketClient#close  close }
+ * to close the connection properly.  Unlike
+ * {@link org.apache.commons.net.daytime.DaytimeTCPClient},
+ * successive calls to {@link #getTime  getTime } are permitted
+ * without re-establishing a connection.  That is because UDP is a
+ * connectionless protocol and the Daytime protocol is stateless.
+ * <p>
+ * <p>
+ * @author Daniel F. Savarese
+ * @see DaytimeTCPClient
+ ***/
+
+public final class DaytimeUDPClient extends DatagramSocketClient
+{
+    /*** The default daytime port.  It is set to 13 according to RFC 867. ***/
+    public static final int DEFAULT_PORT = 13;
+
+    private byte[] __dummyData = new byte[1];
+    // Received dates should be less than 256 bytes
+    private byte[] __timeData = new byte[256];
+
+    /***
+     * Retrieves the time string from the specified server and port and
+     * returns it.
+     * <p>
+     * @param host The address of the server.
+     * @param port The port of the service.
+     * @return The time string.
+     * @exception IOException If an error occurs while retrieving the time.
+     ***/
+    public String getTime(InetAddress host, int port) throws IOException
+    {
+        DatagramPacket sendPacket, receivePacket;
+
+        sendPacket =
+            new DatagramPacket(__dummyData, __dummyData.length, host, port);
+        receivePacket = new DatagramPacket(__timeData, __timeData.length);
+
+        _socket_.send(sendPacket);
+        _socket_.receive(receivePacket);
+
+        return new String(receivePacket.getData(), 0, receivePacket.getLength());
+    }
+
+    /*** Same as <code>getTime(host, DaytimeUDPClient.DEFAULT_PORT);</code> ***/
+    public String getTime(InetAddress host) throws IOException
+    {
+        return getTime(host, DEFAULT_PORT);
+    }
+
+}
+