public override ValidationResult Validate(object value, CultureInfo cultureInfo)
{
var isValid = true;
if (value == null)
{
return(new ValidationResult(false, Localization.Resources.Strings.EnterValidIPScanRange));
}
foreach (var ipHostOrRange in ((string)value).Replace(" ", "").Split(';'))
{
// like 192.168.0.1
if (Regex.IsMatch(ipHostOrRange, RegexHelper.IPv4AddressRegex))
{
continue;
}
// like 192.168.0.0/24
if (Regex.IsMatch(ipHostOrRange, RegexHelper.IPv4AddressCidrRegex))
{
continue;
}
// like 192.168.0.0/255.255.255.0
if (Regex.IsMatch(ipHostOrRange, RegexHelper.IPv4AddressSubnetmaskRegex))
{
continue;
}
// like 192.168.0.0 - 192.168.0.100
if (Regex.IsMatch(ipHostOrRange, RegexHelper.IPv4AddressRangeRegex))
{
var range = ipHostOrRange.Split('-');
if (IPv4Address.ToInt32(IPAddress.Parse(range[0])) >=
IPv4Address.ToInt32(IPAddress.Parse(range[1])))
{
isValid = false;
}
continue;
}
// like 192.168.[50-100].1
if (Regex.IsMatch(ipHostOrRange, RegexHelper.IPv4AddressSpecialRangeRegex))
{
var octets = ipHostOrRange.Split('.');
foreach (var octet in octets)
{
// Match [50-100]
if (!Regex.IsMatch(octet, RegexHelper.SpecialRangeRegex))
{
continue;
}
foreach (var numberOrRange in octet.Substring(1, octet.Length - 2).Split(','))
{
if (!numberOrRange.Contains("-"))
{
continue;
}
// 50-100 --> {50, 100}
var rangeNumber = numberOrRange.Split('-');
if (int.Parse(rangeNumber[0]) > int.Parse(rangeNumber[1]))
{
isValid = false;
}
}
}
continue;
}
// like server-01.example.com
if (Regex.IsMatch(ipHostOrRange, RegexHelper.HostnameRegex))
{
continue;
}
// like server-01.example.com/24
if (Regex.IsMatch(ipHostOrRange, RegexHelper.HostnameCidrRegex))
{
continue;
}
// like server-01.example.com/255.255.255.0
if (Regex.IsMatch(ipHostOrRange, RegexHelper.HostnameSubnetmaskRegex))
{
continue;
}
isValid = false;
}
return(isValid ? ValidationResult.ValidResult : new ValidationResult(false, Localization.Resources.Strings.EnterValidIPScanRange));
}