IPAddressRange Class Library

This library allows you to parse range of IP address string such as "192.168.0.0/24" and "192.168.0.0/255.255.255.0" and "192.168.0.0-192.168.0.255", and can contains check. This library supports both IPv4 and IPv6.

Example

using NetTools;
...
// rangeA.Begin is "192.168.0.0", and rangeA.End is "192.168.0.255".
var rangeA = IPAddressRange.Parse("192.168.0.0/255.255.255.0");
rangeA.Contains(IPAddress.Parse("192.168.0.34")); // is True.
rangeA.Contains(IPAddress.Parse("192.168.10.1")); // is False.
rangeA.ToCidrString(); // is 192.168.0.0/24

// rangeB.Begin is "192.168.0.10", and rangeB.End is "192.168.10.20".
var rangeB1 = IPAddressRange.Parse("192.168.0.10 - 192.168.10.20");
rangeB1.Contains(IPAddress.Parse("192.168.3.45")); // is True.
rangeB1.Contains(IPAddress.Parse("192.168.0.9")); // is False.

// Support shortcut range description. 
// ("192.168.10.10-20" means range of begin:192.168.10.10 to end:192.168.10.20.)
var rangeB2 = IPAddressRange.Parse("192.168.10.10-20");

// Support CIDR expression and IPv6.
var rangeC = IPAddressRange.Parse("fe80::/10"); 
rangeC.Contains(IPAddress.Parse("fe80::d503:4ee:3882:c586%3")); // is True.
rangeC.Contains(IPAddress.Parse("::1")); // is False.

// "Contains()" method also support IPAddressRange argument.
var rangeD1 = IPAddressRange.Parse("192.168.0.0/16");
var rangeD2 = IPAddressRange.Parse("192.168.10.0/24");
rangeD1.Contains(rangeD2); // is True.

// IEnumerable<IPAddress> support, it's lazy evaluation.
foreach (var ip in IPAddressRange.Parse("192.168.0.1/23"))
{
    Console.WriteLine(ip);
}

// You can use LINQ via "AsEnumerable()" method.
var longValues = IPAddressRange.Parse("192.168.0.1/23")
  .AsEnumerable()
  .Select(ip => BitConvert.ToInt32(ip.GetAddressBytes(), 0))
  .Select(adr => adr.ToString("X8"));
Console.WriteLine(string.Join(",", longValues);

// Constructors from IPAddress objects.
var ipBegin = IPAddress.Parse("192.168.0.1");
var ipEnd = IPAddress.Parse("192.168.0.128");
var ipSubnet = IPAddress.Parse("255.255.255.0");

var rangeE = new IPAddressRange(); // This means "0.0.0.0/0".
var rangeF = new IPAddressRange(ipBegin, ipEnd);
var rangeG = new IPAddressRange(ipBegin, maskLength: 24);
var rangeH = new IPAddressRange(ipBegin, IPAddressRange.SubnetMaskLength(ipSubnet));

// Calculates Cidr subnets
var rangeI = IPAddressRange.Parse("192.168.0.0-192.168.0.254");
rangeI.ToCidrString();  // is 192.168.0.0/24

Release Note

• v.4.0.0 - Implement "IEquatable<T>" interface and "GetHashCode()".
• v.3.2.2 - Fix: Parsing non-linear subnet mask should be failed.
• v.3.2.1 - Fix implementation problem (Remove useless GetAddressBytes)
• v.3.2.0
  • Fix: Bits.GE/LE operations are reversed.(use GtE/LtE instead.)
  • Improve: Bts.GtE/LtE methods are more faster now.
• v.3.1.1 - Fix: Error if parsing IP address includes some spaces.
• v.3.1.0 - Support parsing for IPv4 mapped to IPv6 address range.
• v.3.0.0 - Sign the assembly. (make it to strong-named assembly.)
• v.2.2.0 - Enhance: IPv4 shortcut notation support (like "192.168.0.0-255").
• v.2.1.1 - Fix: Error if parsing IP address with scope id in the end.
• v.2.1.0 - Enhance: Add "IsEqual" and "Decrement" methods to "Bits" utility class.
• v.2.0.0
  • [BREAKING CHANGE] Truncate .NET 4.0 support.
  • Enhance: can serialize/deserialize json text by JSON.NET
• v.1.6.2 - Support: .NET Standard 1.4 (.NET Core) and UWP
• v.1.6.1 - Fix: Add some parameter checks for throwing ArgumentNullException
• v.1.6.0 - Enhance: Add "ToCidrString()" and "GetprefixLength()" method.
• v.1.5.0 - Enhance: Add constructors variation / Save memory usage.
• v.1.4.0 - Enhance: Add IEnumerable support.
• v.1.3.0 - Enhance: support both "hyphen (-)" (0x002D) and "dash (–)" (0x2013) at begin-- end format.
• v.1.2.1 - Fix: "Parse()" and "TryParse()" methods throw IndexOutOfRangeException when bit- mask length is invalid at CIDR format.
• v.1.2.0 - Enhance: Add "Parse()" and "TryParse()" methods. (Instead, the constructor - which has one string argument is obsoleted.)
• v.1.1.0 - Enhance: Add "Contains()" method overload version of IPAddressRange argument.
• v.1.0.6 - Fix Package: Repackage with Release build. (1.0.5 was Debug build)
• v.1.0.5 - Fix: IPv4 CIDR range ".../32" causes crush.
• v.1.0.4 - Enhance: support bit mask range not only CIDR range.
• v.1.0.3 - Fix: Can not parse the address which contains hex string.

License

Mozilla Public License 2.0