public RoutingInstance(Device device, RoutingInstanceType type, string name = "", int?tenantId = null,
RouteDistinguisherRange range = null, int?administratorSubField = null, int?assignedNumberSubField = null)
{
this._device = device ?? throw new ArgumentNullException(nameof(device));
if (!string.IsNullOrEmpty(name))
{
if (device.RoutingInstances.Any(routingInstance => routingInstance.Name == name))
{
throw new SigmaDomainException($"Routing instance name '{name}' is already used. Please choose another.");
}
this.Name = name;
}
else
{
this.Name = Guid.NewGuid().ToString("N");
}
this.RoutingInstanceType = type ?? throw new ArgumentNullException(nameof(type));
this._routingInstanceTypeId = type.Id;
this._routeDistinguisherRange = range;
// Must assign a route distinguisher to this routing instance if the routing instance type is VRF
// Note the Default routing instance type must not be assigned a route distinguisher
if (type == RoutingInstanceType.Vrf)
{
AssignRouteDistinguisher(administratorSubField, assignedNumberSubField, range);
}
this._tenantId = tenantId;
}
protected void AssignRouteDistinguisher(int?administratorSubField, int?assignedNumberSubField, RouteDistinguisherRange range)
{
if (administratorSubField.HasValue && assignedNumberSubField.HasValue)
{
if (this._device.RoutingInstances.Any(routingInstance =>
routingInstance.AssignedNumberSubField == assignedNumberSubField.Value &&
routingInstance.AdministratorSubField == administratorSubField.Value))
{
throw new SigmaDomainException($"A routing instance with route distinguisher " +
"'{administratorSubField}:{assignedNumberSubField}' already exists.");
}
AdministratorSubField = administratorSubField;
AssignedNumberSubField = assignedNumberSubField;
}
else
{
if (range == null)
{
throw new ArgumentNullException(nameof(range));
}
var usedAssignedNumbers = range.RoutingInstances
.Where(routingInstance =>
routingInstance.AssignedNumberSubField.HasValue)
.Select(routingInstance =>
routingInstance.AssignedNumberSubField.Value)
.ToList();
// Allocate a new unused RD from the RD range
int?newAssignedNumberSubField = Enumerable.Range(range.AssignedNumberSubFieldStartValue, range.GetCount())
.Except(usedAssignedNumbers).FirstOrDefault();
AssignedNumberSubField = newAssignedNumberSubField ?? throw new SigmaDomainException("Failed to allocate a free route distinguisher. " +
"Please contact your system administrator, or try another range.");
AdministratorSubField = range.AdministratorSubField;
}
}