using System;
using System.Net;

namespace LoweSoftware.Tools
{
   /// <summary>
   /// Used to convert and compare IP addresses.
   ///
   /// By Alexander Lowe, Lowe*Software.
   /// http://www.lowesoftware.com
   ///
   /// Free for use and modification. No warranty express or
   /// implied.
   /// </summary>
   class IPCompare
   {
      /// <summary>
      /// Compares two IP addresses for equality.
      /// </summary>
      /// <param name="IPAddr1">The first IP to compare</param>
      /// <param name="IPAddr2">The second IP to compare</param>
      /// <returns>True if equal, false if not.</returns>
      static public bool AreEqual(string IPAddr1, string IPAddr2)
      {
         // convert to long in case there is any zero padding in
         // the strings
         return IPAddressToLongBackwards(IPAddr1)==
            sIPAddressToLongBackwards(IPAddr2);
      }

      /// <summary>
      /// Compares two string representations of an Ip address to
      /// see if one is greater than the other
      /// </summary>
      /// <param name="ToCompare">The IP address on the left hand
      /// side of the greater than operator</param>
      /// <param name="CompareAgainst">The Ip address on the right
      /// hand side of the greater than operator</param>
      /// <returns>True if ToCompare is greater than CompareAgainst,
      /// else false</returns>
      static public bool IsGreater(string ToCompare,
                                   string CompareAgainst)
      {
         // convert to long in case there is any zero padding in
         // the strings
         return IPAddressToLongBackwards(ToCompare)>
            IPAddressToLongBackwards(CompareAgainst);
      }

      /// <summary>
      /// Compares two string representations of an Ip address to
      /// see if one is less than the other
      /// </summary>
      /// <param name="ToCompare">The IP address on the left hand
      /// side of the less than operator</param>
      /// <param name="CompareAgainst">The Ip address on the right
      /// hand side of the less than operator</param>
      /// <returns>True if ToCompare is greater than CompareAgainst,
      /// else fa