Coverage report

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org.apache.commons.net.ntp.NtpUtils
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 1   
 package org.apache.commons.net.ntp;
 2   
 /*
 3   
  * Copyright 2001-2005 The Apache Software Foundation
 4   
  *
 5   
  * Licensed under the Apache License, Version 2.0 (the "License");
 6   
  * you may not use this file except in compliance with the License.
 7   
  * You may obtain a copy of the License at
 8   
  *
 9   
  *     http://www.apache.org/licenses/LICENSE-2.0
 10   
  *
 11   
  * Unless required by applicable law or agreed to in writing, software
 12   
  * distributed under the License is distributed on an "AS IS" BASIS,
 13   
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 14   
  * See the License for the specific language governing permissions and
 15   
  * limitations under the License.
 16   
  */
 17   
 
 18   
 /***
 19   
  * Common NtpUtils Helper class.
 20   
  *
 21   
  * @author Jason Mathews, MITRE Corp
 22   
  *
 23   
  * @version $Revision: 165675 $ $Date: 2005-05-02 21:09:55 +0100 (Mon, 02 May 2005) $
 24   
  */
 25  0 
 public final class NtpUtils {
 26   
 
 27   
     /***
 28   
       * Returns 32-bit integer address to IPv4 address string "%d.%d.%d.%d" format.
 29   
       *
 30   
       * @param address  the 32-bit address
 31   
       * @return  the raw IP address in a string format.
 32   
       */
 33   
      public static String getHostAddress(int address)
 34   
      {
 35  0 
           return ((address >>> 24) & 0xFF) + "." +
 36   
                  ((address >>> 16) & 0xFF) + "." +
 37   
                  ((address >>>  8) & 0xFF) + "." +
 38   
                  ((address >>>  0) & 0xFF);
 39   
      }
 40   
 
 41   
     /***
 42   
      * Returns NTP packet reference identifier as IP address.
 43   
      *
 44   
      * @param packet  NTP packet
 45   
      * @return  the packet reference id (as IP address) in "%d.%d.%d.%d" format.
 46   
      */
 47   
      public static String getRefAddress(NtpV3Packet packet)
 48   
      {
 49  0 
          int address = (packet == null) ? 0 : packet.getReferenceId();
 50  0 
          return getHostAddress(address);
 51   
      }
 52   
 
 53   
     /***
 54   
      * Get refId as reference clock string (e.g. GPS, WWV, LCL). If string is
 55   
      * invalid (non-ASCII character) then returns empty string "".
 56   
      * For details refer to the <A HREF="http://www.eecis.udel.edu/~mills/ntp/html/refclock.html#list">Comprehensive
 57   
      * List of Clock Drivers</A>.
 58   
      *
 59   
      * @param message
 60   
      * @return reference clock string if primary NTP server
 61   
      */
 62   
     public static String getReferenceClock(NtpV3Packet message) {
 63  0 
         if (message == null)
 64  0 
             return "";
 65  0 
         int refId = message.getReferenceId();
 66  0 
         if (refId == 0)
 67  0 
             return "";
 68  0 
         StringBuffer buf = new StringBuffer(4);
 69   
         // start at highest-order byte (0x4c434c00 -> LCL)
 70  0 
         for (int shiftBits = 24; shiftBits >= 0; shiftBits -= 8)
 71   
         {
 72  0 
             char c = (class="keyword">char) ((refId >>> shiftBits) & 0xff);
 73  0 
             if (c == 0) break; // 0-terminated ASCII string
 74  0 
             if (!Character.isLetterOrDigit(c))
 75  0 
                 return "";
 76  0 
             buf.append(c);
 77   
         }
 78  0 
         return buf.toString();
 79   
     }
 80   
 
 81   
     /***
 82   
      * Return human-readable name of message mode type (RFC 1305).
 83   
      *
 84   
      * @param mode
 85   
      * @return mode name
 86   
      */
 87   
     public static String getModeName(int mode)
 88   
     {
 89  0 
         switch (mode) {
 90   
             case NtpV3Packet.MODE_RESERVED:
 91  0 
                 return "Reserved";
 92   
             case NtpV3Packet.MODE_SYMMETRIC_ACTIVE:
 93  0 
                 return "Symmetric Active";
 94   
             case NtpV3Packet.MODE_SYMMETRIC_PASSIVE:
 95  0 
                 return "Symmetric Passive";
 96   
             case NtpV3Packet.MODE_CLIENT:
 97  0 
                 return "Client";
 98   
             case NtpV3Packet.MODE_SERVER:
 99  0 
                 return "Server";
 100   
             case NtpV3Packet.MODE_BROADCAST:
 101  0 
                 return "Broadcast";
 102   
             case NtpV3Packet.MODE_CONTROL_MESSAGE:
 103  0 
                 return "Control";
 104   
             case NtpV3Packet.MODE_PRIVATE:
 105  0 
                 return "Private";
 106   
             default:
 107  0 
                 return "Unknown";
 108   
         }
 109   
     }
 110   
 
 111   
 }

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