/// <summary>
/// Initialization constructor
/// </summary>
public AuthenticatingTDSServer(AuthenticatingTDSServerArguments arguments) :
base(arguments)
{
}
/// <summary>
/// Handler for login request
/// </summary>
public override TDSMessageCollection OnLogin7Request(ITDSServerSession session, TDSMessage request)
{
// Inflate login7 request from the message
TDSLogin7Token loginRequest = request[0] as TDSLogin7Token;
// Check if arguments are of the authenticating TDS server
if (Arguments is AuthenticatingTDSServerArguments)
{
// Cast to authenticating TDS server arguments
AuthenticatingTDSServerArguments ServerArguments = Arguments as AuthenticatingTDSServerArguments;
// Check if we're still processing normal login
if (ServerArguments.ApplicationIntentFilter != ApplicationIntentFilterType.All)
{
// Check filter
if ((ServerArguments.ApplicationIntentFilter == ApplicationIntentFilterType.ReadOnly && loginRequest.TypeFlags.ReadOnlyIntent != TDSLogin7TypeFlagsReadOnlyIntent.ReadOnly) ||
(ServerArguments.ApplicationIntentFilter == ApplicationIntentFilterType.None))
{
// Log request to which we're about to send a failure
TDSUtilities.Log(Arguments.Log, "Request", loginRequest);
// Prepare ERROR token with the denial details
TDSErrorToken errorToken = new TDSErrorToken(18456, 1, 14, "Received application intent: " + loginRequest.TypeFlags.ReadOnlyIntent.ToString(), Arguments.ServerName);
// Log response
TDSUtilities.Log(Arguments.Log, "Response", errorToken);
// Serialize the error token into the response packet
TDSMessage responseMessage = new TDSMessage(TDSMessageType.Response, errorToken);
// Prepare ERROR token for the final decision
errorToken = new TDSErrorToken(18456, 1, 14, "Connection is denied by application intent filter", Arguments.ServerName);
// Log response
TDSUtilities.Log(Arguments.Log, "Response", errorToken);
// Serialize the error token into the response packet
responseMessage.Add(errorToken);
// Create DONE token
TDSDoneToken doneToken = new TDSDoneToken(TDSDoneTokenStatusType.Final | TDSDoneTokenStatusType.Error);
// Log response
TDSUtilities.Log(Arguments.Log, "Response", doneToken);
// Serialize DONE token into the response packet
responseMessage.Add(doneToken);
// Put a single message into the collection and return it
return(new TDSMessageCollection(responseMessage));
}
}
// Check if we're still processing normal login and there's a filter to check
if (ServerArguments.ServerNameFilterType != ServerNameFilterType.None)
{
// Check each algorithm
if ((ServerArguments.ServerNameFilterType == ServerNameFilterType.Equals && string.Compare(ServerArguments.ServerNameFilter, loginRequest.ServerName, true) != 0) ||
(ServerArguments.ServerNameFilterType == ServerNameFilterType.StartsWith && !loginRequest.ServerName.StartsWith(ServerArguments.ServerNameFilter)) ||
(ServerArguments.ServerNameFilterType == ServerNameFilterType.EndsWith && !loginRequest.ServerName.EndsWith(ServerArguments.ServerNameFilter)) ||
(ServerArguments.ServerNameFilterType == ServerNameFilterType.Contains && !loginRequest.ServerName.Contains(ServerArguments.ServerNameFilter)))
{
// Log request to which we're about to send a failure
TDSUtilities.Log(Arguments.Log, "Request", loginRequest);
// Prepare ERROR token with the reason
TDSErrorToken errorToken = new TDSErrorToken(18456, 1, 14, string.Format("Received server name \"{0}\", expected \"{1}\" using \"{2}\" algorithm", loginRequest.ServerName, ServerArguments.ServerNameFilter, ServerArguments.ServerNameFilterType), Arguments.ServerName);
// Log response
TDSUtilities.Log(Arguments.Log, "Response", errorToken);
// Serialize the errorToken token into the response packet
TDSMessage responseMessage = new TDSMessage(TDSMessageType.Response, errorToken);
// Prepare ERROR token with the final errorToken
errorToken = new TDSErrorToken(18456, 1, 14, "Connection is denied by server name filter", Arguments.ServerName);
// Log response
TDSUtilities.Log(Arguments.Log, "Response", errorToken);
// Serialize the errorToken token into the response packet
responseMessage.Add(errorToken);
// Create DONE token
TDSDoneToken doneToken = new TDSDoneToken(TDSDoneTokenStatusType.Final | TDSDoneTokenStatusType.Error);
// Log response
TDSUtilities.Log(Arguments.Log, "Response", doneToken);
// Serialize DONE token into the response packet
responseMessage.Add(doneToken);
// Return only a single message with the collection
return(new TDSMessageCollection(responseMessage));
}
}
// Check if packet size filter is applied
if (ServerArguments.PacketSizeFilter != null)
{
// Check if requested packet size is the same as the filter specified
if (loginRequest.PacketSize != ServerArguments.PacketSizeFilter.Value)
{
// Log request to which we're about to send a failure
TDSUtilities.Log(Arguments.Log, "Request", loginRequest);
// Prepare ERROR token with the reason
TDSErrorToken errorToken = new TDSErrorToken(1919, 1, 14, string.Format("Received packet size \"{0}\", expected \"{1}\"", loginRequest.PacketSize, ServerArguments.PacketSizeFilter.Value), Arguments.ServerName);
// Log response
TDSUtilities.Log(Arguments.Log, "Response", errorToken);
// Serialize the errorToken token into the response packet
TDSMessage responseMessage = new TDSMessage(TDSMessageType.Response, errorToken);
// Prepare ERROR token with the final errorToken
errorToken = new TDSErrorToken(1919, 1, 14, "Connection is denied by packet size filter", Arguments.ServerName);
// Log response
TDSUtilities.Log(Arguments.Log, "Response", errorToken);
// Serialize the errorToken token into the response packet
responseMessage.Add(errorToken);
// Create DONE token
TDSDoneToken doneToken = new TDSDoneToken(TDSDoneTokenStatusType.Final | TDSDoneTokenStatusType.Error);
// Log response
TDSUtilities.Log(Arguments.Log, "Response", doneToken);
// Serialize DONE token into the response packet
responseMessage.Add(doneToken);
// Return only a single message with the collection
return(new TDSMessageCollection(responseMessage));
}
}
// If we have an application name filter
if (ServerArguments.ApplicationNameFilter != null)
{
// If we are supposed to block this connection attempt
if (loginRequest.ApplicationName.Equals(ServerArguments.ApplicationNameFilter, System.StringComparison.OrdinalIgnoreCase))
{
// Log request to which we're about to send a failure
TDSUtilities.Log(Arguments.Log, "Request", loginRequest);
// Prepare ERROR token with the denial details
TDSErrorToken errorToken = new TDSErrorToken(18456, 1, 14, "Received application name: " + loginRequest.ApplicationName, Arguments.ServerName);
// Log response
TDSUtilities.Log(Arguments.Log, "Response", errorToken);
// Serialize the error token into the response packet
TDSMessage responseMessage = new TDSMessage(TDSMessageType.Response, errorToken);
// Prepare ERROR token for the final decision
errorToken = new TDSErrorToken(18456, 1, 14, "Connection is denied by application name filter", Arguments.ServerName);
// Log response
TDSUtilities.Log(Arguments.Log, "Response", errorToken);
// Serialize the error token into the response packet
responseMessage.Add(errorToken);
// Create DONE token
TDSDoneToken doneToken = new TDSDoneToken(TDSDoneTokenStatusType.Final | TDSDoneTokenStatusType.Error);
// Log response
TDSUtilities.Log(Arguments.Log, "Response", doneToken);
// Serialize DONE token into the response packet
responseMessage.Add(doneToken);
// Put a single message into the collection and return it
return(new TDSMessageCollection(responseMessage));
}
}
}
// Return login response from the base class
return(base.OnLogin7Request(session, request));
}
/// <summary>
/// Initialization constructor
/// </summary>
public AuthenticatingTDSServer(AuthenticatingTDSServerArguments arguments) :
base(arguments)
{
}