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POWorking with MAC and IP addresses in C#
 

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    <p>I'm working on a project that requires the ability to work with MAC and IP addresses. In this particular project, I have a measurement and an upper and lower limits to compare it to, i.e. the measurement must be within the range of the upper/lower limits. Both the measurement and the upper/lower limits can be MAC addresses, IP Addresses, hex, bin, etc. Is it possible to programmatically check if a MAC/IP address is within a particular range? At this point, I'm guessing I would have to convert the MAC or IP address to either hex or binary and to a comparison that way. Any other suggestions are welcome.</p> <p>UPDATE: Using the info from the link alexn provided, I implemented Richard Szalay's class to check for IP Address ranges below for anyone else who needs it.</p> <pre><code>/// &lt;summary&gt; /// Used for evaluating IPAddress ranges. Class courtesy of Richard Szalay's solution on http://stackoverflow.com/questions/2138706/c-how-to-check-a-input-ip-fall-in-a-specific-ip-range /// &lt;/summary&gt; class IPAddressRange { private Byte[] _upperBytes, _lowerBytes; private AddressFamily _addressFamily; public IPAddressRange(IPAddress upper, IPAddress lower) { this._addressFamily = lower.AddressFamily; this._upperBytes = upper.GetAddressBytes(); this._lowerBytes = lower.GetAddressBytes(); } public Byte[] upperBytes { get { return _upperBytes; } set { this._upperBytes = value; } } public Byte[] lowerBytes { get { return _lowerBytes; } set { this._lowerBytes = value; } } /// &lt;summary&gt; /// Determines if the IPAddress is within the range of the upper and lower limits defined in this class instance /// &lt;/summary&gt; /// &lt;param name="address"&gt;An address to check against pre-defined upper and lower limits&lt;/param&gt; /// &lt;returns&gt;True, if it's within range, false otherwise.&lt;/returns&gt; public bool IsInRange(IPAddress address) { if (address.AddressFamily != _addressFamily) { return false; } byte[] addressBytes = address.GetAddressBytes(); bool lowerBoundary = true, upperBoundary = true; for (int i = 0; i &lt; this.lowerBytes.Length &amp;&amp; (lowerBoundary || upperBoundary); i++) { if ((lowerBoundary &amp;&amp; addressBytes[i] &lt; lowerBytes[i]) || (upperBoundary &amp;&amp; addressBytes[i] &gt; upperBytes[i])) { return false; } lowerBoundary &amp;= (addressBytes[i] == lowerBytes[i]); upperBoundary &amp;= (addressBytes[i] == upperBytes[i]); } return true; } } </code></pre> <p>@JYelton - Thank you for your help, I will work on a similar class for MAC Addresses implementing the methods you outlined. I may eliminate the classes, in favor of your minimalist approach, in later iterations.</p>
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