/// <summary>
/// Initializes the MIB type. This will remove all levels of
/// indirection present, such as references to types or values. No
/// information is lost by this operation. This method may modify
/// this object as a side-effect, and will return the basic
/// type.
/// NOTE: This is an internal method that should
/// only be called by the MIB loader.
/// </summary>
/// <param name="symbol">The MIB symbol containing this type</param>
/// <param name="log">The MIB loader log</param>
/// <returns>The basic MIB type</returns>
public override MibType Initialize(MibSymbol symbol, MibLoaderLog log)
{
if (!(symbol is MibValueSymbol))
{
throw new MibException(
symbol.Location,
"only values can have the " + Name + " type");
}
this.syntax = this.syntax.Initialize(symbol, log);
SnmpObjectType.CheckType((MibValueSymbol)symbol, log, this.syntax);
foreach (SnmpIndex si in this.index)
{
si.Initialize(symbol, log);
}
if (this.augments != null)
{
this.augments = this.augments.Initialize(log, this.syntax);
}
if (this.defaultValue != null)
{
this.defaultValue = this.defaultValue.Initialize(log, this.syntax);
}
return(this);
}
/// <summary>
/// Validates a MIB type. This will check any sequences and make
/// sure their elements are present in the MIB file. If they are
/// not, new symbols will be added to the MIB.
/// </summary>
/// <param name="symbol">The MIB symbol containing this type</param>
/// <param name="log">The MIB loader log</param>
/// <param name="type">The MIB type to check</param>
/// <exception cref="MibException">
/// If an error was encountered during the validation
/// </exception>
private static void CheckType(
MibValueSymbol symbol,
MibLoaderLog log,
MibType type)
{
if (type is SequenceOfType sequence)
{
SnmpObjectType.CheckType(symbol, log, sequence.ElementType);
}
else if (type is SequenceType tp)
{
IList <ElementType> elems = tp.AllElements.ToList();
for (int i = 0; i < elems.Count(); i++)
{
SnmpObjectType.CheckElement(symbol, log, elems[i], i + 1);
}
}
}
/// <summary>
/// Validates an element type. This will check that the element
/// is present in the MIB file. If it is not, a new symbol will be
/// added to the MIB.
/// </summary>
/// <param name="symbol">The MIB symbol containing this type</param>
/// <param name="log">The MIB Loader log</param>
/// <param name="element">The MIB element type to check</param>
/// <param name="pos">The MIB element position</param>
/// <exception cref="MibException">
/// If an error was encountered during the validation
/// </exception>
private static void CheckElement(
MibValueSymbol symbol,
MibLoaderLog log,
ElementType element,
int pos)
{
Mib mib = symbol.Mib;
MibSymbol elementSymbol;
string name;
MibType type;
ObjectIdentifierValue value;
elementSymbol = mib.GetSymbol(element.Name);
if (elementSymbol == null)
{
if (element.Name != null)
{
name = pos + " '" + element.Name + "'";
}
else
{
name = pos.ToString();
}
string msg = "sequence element " + name + " is undefined " +
"in MIB, a default symbol will be created";
log.AddWarning(symbol.Location, msg);
name = element.Name;
if (name == null)
{
name = symbol.Name + "." + pos;
}
type = new SnmpObjectType(
element.Type,
null,
SnmpAccess.ReadOnly,
SnmpStatus.CURRENT,
"AUTOMATICALLY CREATED SYMBOL",
null,
new List <SnmpIndex>(),
null);
value = (ObjectIdentifierValue)symbol.Value;
value = new ObjectIdentifierValue(
symbol.Location,
value,
element.Name,
pos);
elementSymbol = new MibValueSymbol(
symbol.Location,
mib,
name,
type,
value);
elementSymbol.Initialize(log);
}
else if (elementSymbol is MibTypeSymbol)
{
if (element.Name != null)
{
name = pos + " '" + element.Name + "'";
}
else
{
name = pos.ToString();
}
throw new MibException(
symbol.Location,
"sequence element " + name + " does not refer to a value, but to a type");
}
}
