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diff --git a/org/apache/commons/net/ntp/NtpUtils.java b/org/apache/commons/net/ntp/NtpUtils.java
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+package org.apache.commons.net.ntp;
+/*
+ * 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.
+ */
+
+
+/***
+ * Common NtpUtils Helper class.
+ *
+ * @author Jason Mathews, MITRE Corp
+ *
+ * @version $Revision: 489397 $ $Date: 2006-12-21 16:28:51 +0000 (Thu, 21 Dec 2006) $
+ */
+public final class NtpUtils {
+
+    /***
+      * Returns 32-bit integer address to IPv4 address string "%d.%d.%d.%d" format.
+      *
+      * @param address  the 32-bit address
+      * @return  the raw IP address in a string format.
+      */
+     public static String getHostAddress(int address)
+     {
+          return ((address >>> 24) & 0xFF) + "." +
+                 ((address >>> 16) & 0xFF) + "." +
+                 ((address >>>  8) & 0xFF) + "." +
+                 ((address >>>  0) & 0xFF);
+     }
+
+    /***
+     * Returns NTP packet reference identifier as IP address.
+     *
+     * @param packet  NTP packet
+     * @return  the packet reference id (as IP address) in "%d.%d.%d.%d" format.
+     */
+     public static String getRefAddress(NtpV3Packet packet)
+     {
+         int address = (packet == null) ? 0 : packet.getReferenceId();
+         return getHostAddress(address);
+     }
+
+    /***
+     * Get refId as reference clock string (e.g. GPS, WWV, LCL). If string is
+     * invalid (non-ASCII character) then returns empty string "".
+     * For details refer to the <A HREF="http://www.eecis.udel.edu/~mills/ntp/html/refclock.html#list">Comprehensive
+     * List of Clock Drivers</A>.
+     *
+     * @param message
+     * @return reference clock string if primary NTP server
+     */
+    public static String getReferenceClock(NtpV3Packet message) {
+        if (message == null)
+            return "";
+        int refId = message.getReferenceId();
+        if (refId == 0)
+            return "";
+        StringBuffer buf = new StringBuffer(4);
+        // start at highest-order byte (0x4c434c00 -> LCL)
+        for (int shiftBits = 24; shiftBits >= 0; shiftBits -= 8)
+        {
+            char c = (char) ((refId >>> shiftBits) & 0xff);
+            if (c == 0) break; // 0-terminated ASCII string
+            if (!Character.isLetterOrDigit(c))
+                return "";
+            buf.append(c);
+        }
+        return buf.toString();
+    }
+
+    /***
+     * Return human-readable name of message mode type (RFC 1305).
+     *
+     * @param mode
+     * @return mode name
+     */
+    public static String getModeName(int mode)
+    {
+        switch (mode) {
+            case NtpV3Packet.MODE_RESERVED:
+                return "Reserved";
+            case NtpV3Packet.MODE_SYMMETRIC_ACTIVE:
+                return "Symmetric Active";
+            case NtpV3Packet.MODE_SYMMETRIC_PASSIVE:
+                return "Symmetric Passive";
+            case NtpV3Packet.MODE_CLIENT:
+                return "Client";
+            case NtpV3Packet.MODE_SERVER:
+                return "Server";
+            case NtpV3Packet.MODE_BROADCAST:
+                return "Broadcast";
+            case NtpV3Packet.MODE_CONTROL_MESSAGE:
+                return "Control";
+            case NtpV3Packet.MODE_PRIVATE:
+                return "Private";
+            default:
+                return "Unknown";
+        }
+    }
+
+}