public IEnumerable <ValidationResult> Validate(ValidationContext validationContext)
{
var results = new List <ValidationResult>();
// Subnet name must be unique.
if (VirtualNetwork.Subnets.Where(s => s.Name.Equals(Name)).FirstOrDefault() != null)
{
results.Add(new ValidationResult("Subnet name must be unique within a virtual network."));
}
// IpPerInstance must be > 0 for non fixed cidr.
if (!Service.FixedSubnetCidr && IpPerInstance <= 0)
{
results.Add(new ValidationResult("Address/Instance must be greater than 0."));
}
// Number of instances need to be between min and max.
if (!Service.FixedSubnetCidr && Service.MaxInstances > Service.MinInstances &&
(ServiceInstances > Service.MaxInstances || ServiceInstances < Service.MinInstances))
{
results.Add(new ValidationResult($"The instance must be between {Service.MinInstances} and {Service.MaxInstances}."));
}
var ipAddress = IPAddress.Parse(StartIP);
IPNetwork network1 = IPNetwork.Parse("10.0.0.0/8");
IPNetwork network2 = IPNetwork.Parse("172.16.0.0/12");
IPNetwork network3 = IPNetwork.Parse("192.168.0.0/16");
if (!network1.Contains(ipAddress) && !network2.Contains(ipAddress) && !network3.Contains(ipAddress))
{
results.Add(new ValidationResult($"The start ip is not in the range of RFC1918."));
return(results);
}
var network = Network;
if (IPRangeId < 0)
{
results.Add(new ValidationResult($"The subnet address range {network} is not contained in the virtual network's address spaces."));
return(results);
}
// Validate CIDR block.
if (!Equals(network.Network, ipAddress))
{
var current = IPNetwork.ToBigInteger(network.Network);
var next = current + network.Total;
var nextIp = IPNetwork.ToIPAddress(next, AddressFamily.InterNetwork);
results.Add(new ValidationResult($"{StartIP}/{network.Cidr} is not a valid CIDR block. Try {network.Network} or {nextIp} instead."));
return(results);
}
// Overlap with other subnets
foreach (var subnet in VirtualNetwork.Subnets)
{
if (network.Overlap(subnet.Network))
{
results.Add(new ValidationResult($"The subnet address range {network} overlaps with {subnet.Name} address range {subnet.Network}."));
break;
}
}
return(results);
}