/// <summary>
/// Create a new range from a begin and end address.
/// Throws an exception if Begin comes after End, or the
/// addresses are not in the same family.
/// </summary>
public IPAddressRange(IPAddress begin, IPAddress end)
{
if (begin == null)
{
throw new ArgumentNullException(nameof(begin));
}
if (end == null)
{
throw new ArgumentNullException(nameof(end));
}
Begin = new IPAddress(begin.GetAddressBytes());
End = new IPAddress(end.GetAddressBytes());
if (Begin.AddressFamily != End.AddressFamily)
{
throw new ArgumentException("Elements must be of the same address family", nameof(end));
}
var beginBytes = Begin.GetAddressBytes();
var endBytes = End.GetAddressBytes();
if (!Bits.GtECore(endBytes, beginBytes))
{
throw new ArgumentException("Begin must be smaller than the End", nameof(begin));
}
}
public bool Contains(IPAddressRange range)
{
if (range == null)
{
throw new ArgumentNullException(nameof(range));
}
if (this.Begin.AddressFamily != range.Begin.AddressFamily)
{
return(false);
}
var offset = 0;
if (Begin.IsIPv4MappedToIPv6 && range.Begin.IsIPv4MappedToIPv6)
{
offset = 12; //ipv4 has prefix of 10 zero bytes and two 255 bytes.
}
return
(Bits.LtECore(this.Begin.GetAddressBytes(), range.Begin.GetAddressBytes(), offset) &&
Bits.GtECore(this.End.GetAddressBytes(), range.End.GetAddressBytes(), offset));
}
public bool Contains(IPAddress ipaddress)
{
if (ipaddress == null)
{
throw new ArgumentNullException(nameof(ipaddress));
}
if (ipaddress.AddressFamily != this.Begin.AddressFamily)
{
return(false);
}
var offset = 0;
if (Begin.IsIPv4MappedToIPv6 && ipaddress.IsIPv4MappedToIPv6)
{
offset = 12; //ipv4 has prefix of 10 zero bytes and two 255 bytes.
}
var adrBytes = ipaddress.GetAddressBytes();
return(Bits.LtECore(this.Begin.GetAddressBytes(), adrBytes, offset) && Bits.GtECore(this.End.GetAddressBytes(), adrBytes, offset));
}