/// <summary>
/// Creates an <see cref="IntegerType"/> instance.
/// </summary>
/// <param name="module"></param>
/// <param name="name"></param>
/// <param name="enumerator"></param>
public IntegerType(IModule module, string name, Symbol type, ISymbolEnumerator symbols)
: base(module, name)
{
Types?t = GetExactType(type);
type.Assert(t.HasValue, "Unknown symbol for unsigned type!");
_type = t.Value;
_isEnumeration = false;
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.OpenBracket)
{
_isEnumeration = true;
symbols.PutBack(current);
_map = Lexer.DecodeEnumerations(symbols);
}
else if (current == Symbol.OpenParentheses)
{
symbols.PutBack(current);
_ranges = Lexer.DecodeRanges(symbols);
current.Assert(!_ranges.IsSizeDeclaration, "SIZE keyword is not allowed for ranges of integer types!");
}
else
{
symbols.PutBack(current);
}
}
/// <summary>
/// Creates an <see cref="IntegerType"/> instance.
/// </summary>
/// <param name="module"></param>
/// <param name="name"></param>
/// <param name="enumerator"></param>
public IntegerType(IModule module, string name, Symbol type, ISymbolEnumerator symbols)
: base (module, name)
{
Types? t = GetExactType(type);
type.Assert(t.HasValue, "Unknown symbol for unsigned type!");
_type = t.Value;
_isEnumeration = false;
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.OpenBracket)
{
_isEnumeration = true;
symbols.PutBack(current);
_map = Lexer.DecodeEnumerations(symbols);
}
else if (current == Symbol.OpenParentheses)
{
symbols.PutBack(current);
_ranges = Lexer.DecodeRanges(symbols);
current.Assert(!_ranges.IsSizeDeclaration, "SIZE keyword is not allowed for ranges of integer types!");
}
else
{
symbols.PutBack(current);
}
}
public OctetStringType(IModule module, string name, ISymbolEnumerator symbols)
: base(module, name)
{
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.OpenParentheses)
{
symbols.PutBack(current);
_size = Lexer.DecodeRanges(symbols);
current.Assert(_size.IsSizeDeclaration, "SIZE keyword is required for ranges of octet string!");
}
else
{
symbols.PutBack(current);
_size = new ValueRanges(isSizeDecl: true);
}
}
private static string ParseAugments(ISymbolEnumerator symbols)
{
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.Augments)
{
string augment = null;
current = symbols.NextNonEOLSymbol();
current.Expect(Symbol.OpenBracket);
current = symbols.NextNonEOLSymbol();
augment = current.ToString();
current = symbols.NextNonEOLSymbol();
current.Expect(Symbol.CloseBracket);
return(augment);
}
else if (current != null)
{
symbols.PutBack(current);
}
return(null);
}
private static string ParseAugments(ISymbolEnumerator symbols)
{
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.Augments)
{
string augment = null;
current = symbols.NextNonEOLSymbol();
current.Expect(Symbol.OpenBracket);
current = symbols.NextNonEOLSymbol();
augment = current.ToString();
current = symbols.NextNonEOLSymbol();
current.Expect(Symbol.CloseBracket);
return augment;
}
else if (current != null)
{
symbols.PutBack(current);
}
return null;
}
public OctetStringType(IModule module, string name, ISymbolEnumerator symbols)
: base(module, name)
{
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.OpenParentheses)
{
symbols.PutBack(current);
_size = Lexer.DecodeRanges(symbols);
current.Assert(_size.IsSizeDeclaration, "SIZE keyword is required for ranges of octet string!");
}
else
{
symbols.PutBack(current);
_size = new ValueRanges(isSizeDecl: true);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="MibDocument"/> class.
/// </summary>
/// <param name="lexer">The lexer.</param>
public MibDocument(Lexer lexer)
{
ISymbolEnumerator symbols = lexer.GetEnumerator();
Symbol current;
while ((current = symbols.NextNonEOLSymbol()) != null)
{
symbols.PutBack(current);
_modules.Add(new MibModule(symbols));
}
}
private static DisplayHint ParseDisplayHint(ISymbolEnumerator symbols)
{
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.DisplayHint)
{
return(new DisplayHint(symbols.NextNonEOLSymbol().ToString().Trim(new char[] { '"' })));
}
symbols.PutBack(current);
return(null);
}
private static DisplayHint ParseDisplayHint(ISymbolEnumerator symbols)
{
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.DisplayHint)
{
return new DisplayHint(symbols.NextNonEOLSymbol().ToString().Trim(new char[] { '"' }));
}
symbols.PutBack(current);
return null;
}
public UnsignedType(IModule module, string name, Symbol type, ISymbolEnumerator symbols)
: base(module, name)
{
Types? t = GetExactType(type);
type.Assert(t.HasValue, "Unknown symbol for unsigned type!");
_type = t.Value;
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.OpenParentheses)
{
current.Assert((_type != Types.Counter64), "Ranges are not supported for Counter64 type!"); // our internal struct can only hold int64 values
symbols.PutBack(current);
_ranges = Lexer.DecodeRanges(symbols);
current.Assert(!_ranges.IsSizeDeclaration, "SIZE keyword is not allowed for ranges of unsigned types!");
}
else
{
symbols.PutBack(current);
}
}
public UnsignedType(IModule module, string name, Symbol type, ISymbolEnumerator symbols)
: base(module, name)
{
Types?t = GetExactType(type);
type.Assert(t.HasValue, "Unknown symbol for unsigned type!");
_type = t.Value;
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.OpenParentheses)
{
current.Assert((_type != Types.Counter64), "Ranges are not supported for Counter64 type!"); // our internal struct can only hold int64 values
symbols.PutBack(current);
_ranges = Lexer.DecodeRanges(symbols);
current.Assert(!_ranges.IsSizeDeclaration, "SIZE keyword is not allowed for ranges of unsigned types!");
}
else
{
symbols.PutBack(current);
}
}
private static string ParseDescription(ISymbolEnumerator symbols)
{
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.Description)
{
return(symbols.NextNonEOLSymbol().ToString().Trim(new char[] { '"' }));
}
else if (current != null)
{
symbols.PutBack(current);
}
return(null);
}
private static string ParseUnits(ISymbolEnumerator symbols)
{
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.Units)
{
return(symbols.NextNonEOLSymbol().ToString());
}
else if (current != null)
{
symbols.PutBack(current);
}
return(null);
}
private static string ParseDefVal(ISymbolEnumerator symbols)
{
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.DefVal)
{
current = symbols.NextNonEOLSymbol();
current.Expect(Symbol.OpenBracket);
string defVal = null;
current = symbols.NextNonEOLSymbol();
if (current == Symbol.OpenBracket)
{
int depth = 1;
// TODO: decode this.
while (depth > 0)
{
current = symbols.NextNonEOLSymbol();
if (current == Symbol.OpenBracket)
{
depth++;
}
else if (current == Symbol.CloseBracket)
{
depth--;
}
}
}
else
{
defVal = current.ToString();
current = symbols.NextNonEOLSymbol();
current.Expect(Symbol.CloseBracket);
}
return(defVal);
}
else if (current != null)
{
symbols.PutBack(current);
}
return(null);
}
private static IList <string> ParseIndices(ISymbolEnumerator symbols)
{
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.Index)
{
current = symbols.NextNonEOLSymbol();
current.Expect(Symbol.OpenBracket);
List <string> indices = new List <string>();
while (current != Symbol.CloseBracket)
{
current = symbols.NextNonEOLSymbol();
bool lastIndex = false;
if (current == Symbol.Implied)
{
current = symbols.NextNonEOLSymbol();
lastIndex = true; // 'IMPLIED' may only be used for last index
}
current.Assert((current != Symbol.Comma) && (current != Symbol.CloseBracket), "Expected index name but found symbol!");
indices.Add(current.ToString());
current = symbols.NextNonEOLSymbol();
if (lastIndex)
{
current.Expect(Symbol.CloseBracket);
}
else
{
current.Expect(Symbol.Comma, Symbol.CloseBracket);
}
}
return(indices);
}
else if (current != null)
{
symbols.PutBack(current);
}
return(null);
}
private static string ParseReference(ISymbolEnumerator symbols)
{
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.Reference)
{
string reference = symbols.NextNonEOLSymbol().ToString();
if ((reference.Length >= 2) && reference.StartsWith("\"") && reference.EndsWith("\""))
{
return reference.Substring(1, reference.Length-2);
}
return reference;
}
symbols.PutBack(current);
return null;
}
private static string ParseReference(ISymbolEnumerator symbols)
{
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.Reference)
{
string reference = symbols.NextNonEOLSymbol().ToString();
if ((reference.Length >= 2) && reference.StartsWith("\"") && reference.EndsWith("\""))
{
return(reference.Substring(1, reference.Length - 2));
}
return(reference);
}
symbols.PutBack(current);
return(null);
}
public MibModule(ISymbolEnumerator symbols)
{
if (symbols == null)
{
throw new ArgumentNullException("lexer");
}
Symbol temp = symbols.NextNonEOLSymbol();
temp.AssertIsValidIdentifier();
_name = temp.ToString().ToUpperInvariant(); // all module names are uppercase
temp = symbols.NextNonEOLSymbol();
temp.Expect(Symbol.Definitions);
temp = symbols.NextNonEOLSymbol();
temp.Expect(Symbol.Assign);
temp = symbols.NextSymbol();
temp.Expect(Symbol.Begin);
temp = symbols.NextNonEOLSymbol();
if (temp == Symbol.Imports)
{
_imports = ParseDependents(symbols);
}
else if (temp == Symbol.Exports)
{
_exports = ParseExports(symbols);
}
else
{
symbols.PutBack(temp);
}
ParseEntities(symbols);
}
public MibModule(ISymbolEnumerator symbols)
{
if (symbols == null)
{
throw new ArgumentNullException("lexer");
}
Symbol temp = symbols.NextNonEOLSymbol();
temp.AssertIsValidIdentifier();
_name = temp.ToString().ToUpperInvariant(); // all module names are uppercase
temp = symbols.NextNonEOLSymbol();
temp.Expect(Symbol.Definitions);
temp = symbols.NextNonEOLSymbol();
temp.Expect(Symbol.Assign);
temp = symbols.NextSymbol();
temp.Expect(Symbol.Begin);
temp = symbols.NextNonEOLSymbol();
if (temp == Symbol.Imports)
{
_imports = ParseDependents(symbols);
}
else if (temp == Symbol.Exports)
{
_exports = ParseExports(symbols);
}
else
{
symbols.PutBack(temp);
}
ParseEntities(symbols);
}
/// <summary>
/// Creates an <see cref="TypeAssignment" />.
/// </summary>
/// <param name="module">The module.</param>
/// <param name="name">The name.</param>
/// <param name="type">The type.</param>
/// <param name="symbols">The symbols.</param>
/// <param name="isMacroSyntax">if set to <c>true</c> indicates that the syntax clause of a macro is parsed (e.g. OBJECT-TYPE, TEXTUAL-CONVENTION).</param>
public TypeAssignment(IModule module, string name, Symbol type, ISymbolEnumerator symbols, bool isMacroSyntax)
{
_module = module;
_name = name;
SymbolList typeSymbols = new SymbolList();
typeSymbols.Add(type);
Symbol current = symbols.NextSymbol();
while (current != Symbol.EOL)
{
if (current == Symbol.OpenParentheses)
{
// parse range of unknown type
symbols.PutBack(current);
_ranges = Lexer.DecodeRanges(symbols);
break;
}
else if (current == Symbol.OpenBracket)
{
symbols.PutBack(current);
_map = Lexer.DecodeEnumerations(symbols);
break;
}
typeSymbols.Add(current);
current = symbols.NextSymbol();
}
_type = typeSymbols.Join(" ");
if ((_ranges == null) && (_map == null))
{
current = symbols.NextNonEOLSymbol();
if (current == Symbol.OpenParentheses)
{
// parse range of unknown type
symbols.PutBack(current);
_ranges = Lexer.DecodeRanges(symbols);
}
else if (current == Symbol.OpenBracket)
{
symbols.PutBack(current);
_map = Lexer.DecodeEnumerations(symbols);
}
else if (current != null)
{
symbols.PutBack(current);
}
}
if (isMacroSyntax)
{
// inside a macro the syntax is limited to one line, except there are brackets used for ranges/enums
return;
}
// outside macro Syntax clause we wait for two consecutive linebreaks with a following valid identifier as end condition
Symbol previous = current;
Symbol veryPrevious = null;
while ((current = symbols.NextSymbol()) != null)
{
if ((veryPrevious == Symbol.EOL) && (previous == Symbol.EOL) && current.IsValidIdentifier())
{
symbols.PutBack(current);
return;
}
veryPrevious = previous;
previous = current;
}
previous.Assert(false, "end of file reached");
}
public static ITypeAssignment ParseBasicTypeDef(IModule module, string name, ISymbolEnumerator symbols, bool isMacroSyntax = false)
{
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.Bits)
{
return new BitsType(module, name, symbols);
}
if (IntegerType.IsIntegerType(current))
{
return new IntegerType(module, name, current, symbols);
}
if (UnsignedType.IsUnsignedType(current))
{
return new UnsignedType(module, name, current, symbols);
}
if (current == Symbol.Opaque)
{
return new OpaqueType(module, name, symbols);
}
if (current == Symbol.IpAddress)
{
return new IpAddressType(module, name, symbols);
}
if (current == Symbol.TextualConvention)
{
return new TextualConvention(module, name, symbols);
}
if (current == Symbol.Octet)
{
Symbol next = symbols.NextNonEOLSymbol();
if (next == Symbol.String)
{
return new OctetStringType(module, name, symbols);
}
symbols.PutBack(next);
}
if (current == Symbol.Object)
{
Symbol next = symbols.NextNonEOLSymbol();
if (next == Symbol.Identifier)
{
return new ObjectIdentifierType(module, name, symbols);
}
symbols.PutBack(next);
}
if (current == Symbol.Sequence)
{
Symbol next = symbols.NextNonEOLSymbol();
if (next == Symbol.Of)
{
return new SequenceOf(module, name, symbols);
}
else
{
symbols.PutBack(next);
return new Sequence(module, name, symbols);
}
}
if (current == Symbol.Choice)
{
return new Choice(module, name, symbols);
}
return new TypeAssignment(module, name, current, symbols, isMacroSyntax);
}
/// <summary>
/// Creates an <see cref="TypeAssignment" />.
/// </summary>
/// <param name="module">The module.</param>
/// <param name="name">The name.</param>
/// <param name="type">The type.</param>
/// <param name="symbols">The symbols.</param>
/// <param name="isMacroSyntax">if set to <c>true</c> indicates that the syntax clause of a macro is parsed (e.g. OBJECT-TYPE, TEXTUAL-CONVENTION).</param>
public TypeAssignment(IModule module, string name, Symbol type, ISymbolEnumerator symbols, bool isMacroSyntax)
{
_module = module;
_name = name;
SymbolList typeSymbols = new SymbolList();
typeSymbols.Add(type);
Symbol current = symbols.NextSymbol();
while (current != Symbol.EOL)
{
if (current == Symbol.OpenParentheses)
{
// parse range of unknown type
symbols.PutBack(current);
_ranges = Lexer.DecodeRanges(symbols);
break;
}
else if (current == Symbol.OpenBracket)
{
symbols.PutBack(current);
_map = Lexer.DecodeEnumerations(symbols);
break;
}
typeSymbols.Add(current);
current = symbols.NextSymbol();
}
_type = typeSymbols.Join(" ");
if ((_ranges == null) && (_map == null))
{
current = symbols.NextNonEOLSymbol();
if (current == Symbol.OpenParentheses)
{
// parse range of unknown type
symbols.PutBack(current);
_ranges = Lexer.DecodeRanges(symbols);
}
else if (current == Symbol.OpenBracket)
{
symbols.PutBack(current);
_map = Lexer.DecodeEnumerations(symbols);
}
else if (current != null)
{
symbols.PutBack(current);
}
}
if (isMacroSyntax)
{
// inside a macro the syntax is limited to one line, except there are brackets used for ranges/enums
return;
}
// outside macro Syntax clause we wait for two consecutive linebreaks with a following valid identifier as end condition
Symbol previous = current;
Symbol veryPrevious = null;
while ((current = symbols.NextSymbol()) != null)
{
if ((veryPrevious == Symbol.EOL) && (previous == Symbol.EOL) && current.IsValidIdentifier())
{
symbols.PutBack(current);
return;
}
veryPrevious = previous;
previous = current;
}
previous.Assert(false, "end of file reached");
}
private void ParseEntity(SymbolList preAssignSymbols, ISymbolEnumerator symbols)
{
if ((preAssignSymbols == null) || (preAssignSymbols.Count == 0))
{
Symbol s = symbols.NextSymbol();
if (s != null)
{
s.Assert(false, "Invalid Entity declaration");
}
else
{
throw new MibException("Invalid Entity declaration");
}
}
// check for a valid identifier
preAssignSymbols[0].AssertIsValidIdentifier();
if (preAssignSymbols.Count == 1)
{
// its a typedef
_tokens.Add(Lexer.ParseBasicTypeDef(this, preAssignSymbols[0].ToString(), symbols, isMacroSyntax: false));
return;
}
ISymbolEnumerator preAssignSymbolsEnumerator = preAssignSymbols.GetSymbolEnumerator();
preAssignSymbolsEnumerator.NextNonEOLSymbol(); // returns identifier
Symbol type = preAssignSymbolsEnumerator.NextNonEOLSymbol();
// parse declarations
if (type == Symbol.Object)
{
Symbol next = preAssignSymbolsEnumerator.NextNonEOLSymbol();
if (next == Symbol.Identifier)
{
_tokens.Add(new OidValueAssignment(this, preAssignSymbols, symbols));
return;
}
else if (next != null)
{
preAssignSymbolsEnumerator.PutBack(next);
}
}
if (type == Symbol.ModuleIdentity)
{
_tokens.Add(new ModuleIdentity(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.ObjectType)
{
_tokens.Add(new ObjectType(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.ObjectGroup)
{
_tokens.Add(new ObjectGroup(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.NotificationGroup)
{
_tokens.Add(new NotificationGroup(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.ModuleCompliance)
{
_tokens.Add(new ModuleCompliance(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.NotificationType)
{
_tokens.Add(new NotificationType(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.ObjectIdentity)
{
_tokens.Add(new ObjectIdentity(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.Macro)
{
_tokens.Add(new Macro(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.TrapType)
{
_tokens.Add(new TrapType(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.AgentCapabilities)
{
_tokens.Add(new AgentCapabilities(this, preAssignSymbols, symbols));
return;
}
preAssignSymbols[1].Assert(false, "Unknown/Invalid declaration");
}
private static string ParseDefVal(ISymbolEnumerator symbols)
{
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.DefVal)
{
current = symbols.NextNonEOLSymbol();
current.Expect(Symbol.OpenBracket);
string defVal = null;
current = symbols.NextNonEOLSymbol();
if (current == Symbol.OpenBracket)
{
int depth = 1;
// TODO: decode this.
while (depth > 0)
{
current = symbols.NextNonEOLSymbol();
if (current == Symbol.OpenBracket)
{
depth++;
}
else if (current == Symbol.CloseBracket)
{
depth--;
}
}
}
else
{
defVal = current.ToString();
current = symbols.NextNonEOLSymbol();
current.Expect(Symbol.CloseBracket);
}
return defVal;
}
else if (current != null)
{
symbols.PutBack(current);
}
return null;
}
private static string ParseUnits(ISymbolEnumerator symbols)
{
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.Units)
{
return symbols.NextNonEOLSymbol().ToString();
}
else if (current != null)
{
symbols.PutBack(current);
}
return null;
}
private static string ParseDescription(ISymbolEnumerator symbols)
{
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.Description)
{
return symbols.NextNonEOLSymbol().ToString().Trim(new char[] { '"' });
}
else if (current != null)
{
symbols.PutBack(current);
}
return null;
}
private static IList<string> ParseIndices(ISymbolEnumerator symbols)
{
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.Index)
{
current = symbols.NextNonEOLSymbol();
current.Expect(Symbol.OpenBracket);
List<string> indices = new List<string>();
while (current != Symbol.CloseBracket)
{
current = symbols.NextNonEOLSymbol();
bool lastIndex = false;
if (current == Symbol.Implied)
{
current = symbols.NextNonEOLSymbol();
lastIndex = true; // 'IMPLIED' may only be used for last index
}
current.Assert((current != Symbol.Comma) && (current != Symbol.CloseBracket), "Expected index name but found symbol!");
indices.Add(current.ToString());
current = symbols.NextNonEOLSymbol();
if (lastIndex)
{
current.Expect(Symbol.CloseBracket);
}
else
{
current.Expect(Symbol.Comma, Symbol.CloseBracket);
}
}
return indices;
}
else if (current != null)
{
symbols.PutBack(current);
}
return null;
}
public static ITypeAssignment ParseBasicTypeDef(IModule module, string name, ISymbolEnumerator symbols, bool isMacroSyntax = false)
{
Symbol current = symbols.NextNonEOLSymbol();
if (current == Symbol.Bits)
{
return(new BitsType(module, name, symbols));
}
if (IntegerType.IsIntegerType(current))
{
return(new IntegerType(module, name, current, symbols));
}
if (UnsignedType.IsUnsignedType(current))
{
return(new UnsignedType(module, name, current, symbols));
}
if (current == Symbol.Opaque)
{
return(new OpaqueType(module, name, symbols));
}
if (current == Symbol.IpAddress)
{
return(new IpAddressType(module, name, symbols));
}
if (current == Symbol.TextualConvention)
{
return(new TextualConvention(module, name, symbols));
}
if (current == Symbol.Octet)
{
Symbol next = symbols.NextNonEOLSymbol();
if (next == Symbol.String)
{
return(new OctetStringType(module, name, symbols));
}
symbols.PutBack(next);
}
if (current == Symbol.Object)
{
Symbol next = symbols.NextNonEOLSymbol();
if (next == Symbol.Identifier)
{
return(new ObjectIdentifierType(module, name, symbols));
}
symbols.PutBack(next);
}
if (current == Symbol.Sequence)
{
Symbol next = symbols.NextNonEOLSymbol();
if (next == Symbol.Of)
{
return(new SequenceOf(module, name, symbols));
}
else
{
symbols.PutBack(next);
return(new Sequence(module, name, symbols));
}
}
if (current == Symbol.Choice)
{
return(new Choice(module, name, symbols));
}
return(new TypeAssignment(module, name, current, symbols, isMacroSyntax));
}
