private static DhcpServerIpRange FromCidr(string cidrSubnet, DhcpServerIpRangeType type, int bootpClientsAllocated, int maxBootpAllowed)
{
if (string.IsNullOrEmpty(cidrSubnet))
{
throw new ArgumentNullException(nameof(cidrSubnet));
}
var slashIndex = cidrSubnet.IndexOf('/');
if (slashIndex < 7 || !BitHelper.TryParseByteFromSubstring(cidrSubnet, ++slashIndex, cidrSubnet.Length - slashIndex, out var significantBits))
{
throw new ArgumentException("Invalid CIDR subnet notation format");
}
var address = DhcpServerIpAddress.FromNative(BitHelper.StringToIpAddress(cidrSubnet, 0, --slashIndex));
var mask = DhcpServerIpMask.FromSignificantBits(significantBits);
return(FromMask(address, mask, type, bootpClientsAllocated, maxBootpAllowed));
}
private static DhcpServerIpRange FromMask(DhcpServerIpAddress address, DhcpServerIpMask mask, DhcpServerIpRangeType type, int bootpClientsAllocated, int maxBootpAllowed)
{
var startAddressNative = address.Native & mask.Native;
var endAddressNative = (address.Native & mask.Native) | ~mask.Native;
if (type == DhcpServerIpRangeType.ScopeDhcpOnly ||
type == DhcpServerIpRangeType.ScopeDhcpAndBootp ||
type == DhcpServerIpRangeType.ScopeBootpOnly)
{
// remove subnet id and broadcast address from range
startAddressNative++;
endAddressNative--;
}
return(new DhcpServerIpRange(startAddress: DhcpServerIpAddress.FromNative(startAddressNative),
endAddress: DhcpServerIpAddress.FromNative(endAddressNative),
type: type,
bootpClientsAllocated: bootpClientsAllocated,
maxBootpAllowed: maxBootpAllowed));
}
public DhcpServerIpAddress DataAsIpAddress() => DhcpServerIpAddress.FromNative(DataAsInt32());
public DhcpServerIpAddress DataAsIpAddress(int index) => DhcpServerIpAddress.FromNative(DataAsInt32(index));
