public static bool TryParseNetwork(string network, out IPRange range, out Exception exception)
{
exception = null;
range = null;
if (network == null)
{
exception = new ArgumentNullException(nameof(network));
return(false);
}
network = network.Trim();
IPAddress singleAddress;
if (IPAddress.TryParse(network, out singleAddress))
{
range = new IPRange(singleAddress, singleAddress);
return(true);
}
var pos = network.IndexOf('/');
if (pos < 0)
{
exception = new ArgumentException("Expected CIDR notation is missing network (correct example would be \"192.168.1.0/24\")", nameof(network));
return(false);
}
IPAddress networkIp;
if (!IPAddress.TryParse(network.Substring(0, pos), out networkIp))
{
exception = new ArgumentException("Cannot parse network part of IP address", nameof(network));
return(false);
}
byte cidr;
if (!byte.TryParse(network.Substring(pos + 1), out cidr))
{
exception = new ArgumentException("Cannot parse CIDR part of IP address", nameof(network));
return(false);
}
var subnetMask = networkIp.AddressFamily == AddressFamily.InterNetworkV6
? IPAddressHelper.CreateSubnetMaskIPv6(cidr)
: IPAddressHelper.CreateSubnetMaskIPv4(cidr);
var fromIp = IPAddressHelper.GetNetworkAddress(networkIp, subnetMask);
var toIp = IPAddressHelper.GetBroadcastAddress(networkIp, subnetMask);
range = new IPRange(fromIp, toIp);
return(true);
}
