TCPServer Component
Properties Methods Events Config Settings Errors
The TCPServer Component is a generic Transmission Control Protocol (TCP) server component based on an asynchronous, event-driven architecture. It is designed to balance the load between connections for a fast, powerful server.
Syntax
TipwTCPServer
Remarks
The TCPServer Component supports both plaintext and Secure Sockets Layer/Transport Layer Security (SSL/TLS) connections. When connecting over Secure Sockets Layer/Transport Layer Security (SSL/TLS) the SSLServerAuthentication event allows you to check the server identity and other security attributes. The SSLStatus event provides information about the SSL handshake. Additional SSL-related settings are also supported through the Config method. The SSLCert properties are used to select a certificate for the server.
Note: A valid certificate MUST be selected before the server can function.
TCPServer is the server complement of TCPClient, which is used to create client applications. They share a common design philosophy and interface. We expect you will find TCPServer as easy to use as TCPClient.
By default, each instance of TCPServer can handle up to 1,000 simultaneous incoming connections. This number may be increased up to 100,000 or decreased to a lower value by using the MaxConnections configuration setting.
The connections are identified by a ConnectionId, an Id generated by the component to identify each connection. This Id is unique to each connection. TCPServer's events also have ConnectionId as a parameter to identify the connection they relate to.
Our main goal in designing TCPServer was to make it easy to use without sacrificing performance. The component has a minimum number of properties, and six events: ConnectionRequest, Connected, DataIn, Disconnected, ReadyToSend, and Error.
TCPServer can start to listen on a port by setting the Listening property to True. When a remote host asks for a connection, the ConnectionRequest event is fired. At that point, the connection can either be accepted or rejected. If the connection is accepted, a ConnectionId is assigned, and communication can start. From this point on, the operation is very similar to TCPClient. Data are sent by assigning the data string to the Text parameter of the Send method. The address and port of the incoming connection can be found by querying the RemoteHost and RemotePort properties.
Note: Server components are designed to process events as they occur. To ensure that events are processed in a timely manner, DoEvents should be called in a loop after the server is started.
Property List
The following is the full list of the properties of the component with short descriptions. Click on the links for further details.
ConnectionBacklog | This property includes the maximum number of pending connections maintained by the Transmission Control Protocol (TCP)/IP subsystem. |
Connections | This property includes a collection of currently connected clients. |
DefaultEOL | This property includes a default end-of-line (EOL) value to be used by incoming connections. |
DefaultIdleTimeout | This property includes the default idle timeout for inactive clients. |
DefaultMaxLineLength | The property includes the default maximum line length value for inbound connections. |
DefaultSingleLineMode | This property tells the component whether or not to treat new connections as line oriented. |
DefaultTimeout | This property includes an initial timeout value to be used by incoming connections. |
KeepAlive | When True, KEEPALIVE packets are enabled (for long connections). |
Linger | When set to True, connections are terminated gracefully. |
Listening | This property indicates whether the component is listening for incoming connections on LocalPort. |
LocalHost | The name of the local host or user-assigned IP interface through which connections are initiated or accepted. |
LocalPort | This property includes the Transmission Control Protocol (TCP) port in the local host where the component listens. |
SSLAuthenticateClients | If set to True, the server asks the client(s) for a certificate. |
SSLCert | The certificate to be used during Secure Sockets Layer (SSL) negotiation. |
SSLEnabled | This property indicates whether Transport Layer Security/Secure Sockets Layer (TLS/SSL) is enabled. |
SSLProvider | The Secure Sockets Layer/Transport Layer Security (SSL/TLS) implementation to use. |
SSLStartMode | This property determines how the component starts the Secure Sockets Layer (SSL) negotiation. |
Method List
The following is the full list of the methods of the component with short descriptions. Click on the links for further details.
ChangeRecordLength | This method changes the length of received data records. |
Config | Sets or retrieves a configuration setting. |
Disconnect | This method disconnects the specified client. |
DoEvents | This method processes events from the internal message queue. |
Interrupt | This method interrupts a synchronous send to the remote host. |
PauseData | This method pauses data reception. |
ProcessData | This method reenables data reception after a call to PauseData . |
Reset | This method will reset the component. |
Send | This method sends binary data to the specified client. |
SendBytes | This method sends binary data to the specified client. |
SendFile | This method sends the file to the remote host. |
SendLine | This method sends a string followed by a new line. |
SendText | This method sends text to the specified client. |
Shutdown | This method shuts down the server. |
StartListening | This method starts listening for incoming connections. |
StartSSL | This method starts the Secure Sockets Layer (SSL) negotiation on a connection. |
StopListening | This method stops listening for new connections. |
Event List
The following is the full list of the events fired by the component with short descriptions. Click on the links for further details.
Connected | This event is fired immediately after a connection completes (or fails). |
ConnectionRequest | This event is fired when a request for connection comes from a remote host. |
DataIn | This event is fired when data come in. |
Disconnected | This event is fired when a connection is closed. |
Error | This event fires information about errors during data delivery. |
ReadyToSend | This event is fired when the component is ready to send data. |
SSLClientAuthentication | This event is fired when the client presents its credentials to the server. |
SSLConnectionRequest | This event fires when a Secure Sockets Layer (SSL) connection is requested. |
SSLStatus | This event is fired to show the progress of the secure connection. |
Config Settings
The following is a list of config settings for the component with short descriptions. Click on the links for further details.
AllowedClients | A comma-separated list of host names or IP addresses that can access the component. |
BindExclusively | Whether or not the component considers a local port reserved for exclusive use. |
BlockedClients | A comma-separated list of host names or IP addresses that cannot access the component. |
CloseStreamAfterTransfer | If true, the component will close the upload or download stream after the transfer. |
DefaultConnectionTimeout | The inactivity timeout applied to the SSL handshake. |
InBufferSize | The size in bytes of the incoming queue of the socket. |
KeepAliveInterval | The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received. |
KeepAliveTime | The inactivity time in milliseconds before a TCP keep-alive packet is sent. |
MaxConnections | The maximum number of connections available. |
OutBufferSize | The size in bytes of the outgoing queue of the socket. |
TcpNoDelay | Whether or not to delay when sending packets. |
UseIPv6 | Whether to use IPv6. |
LogSSLPackets | Controls whether SSL packets are logged when using the internal security API. |
OpenSSLCADir | The path to a directory containing CA certificates. |
OpenSSLCAFile | Name of the file containing the list of CA's trusted by your application. |
OpenSSLCipherList | A string that controls the ciphers to be used by SSL. |
OpenSSLPrngSeedData | The data to seed the pseudo random number generator (PRNG). |
ReuseSSLSession | Determines if the SSL session is reused. |
SSLCACerts | A newline separated list of CA certificates to be included when performing an SSL handshake. |
SSLCheckCRL | Whether to check the Certificate Revocation List for the server certificate. |
SSLCheckOCSP | Whether to use OCSP to check the status of the server certificate. |
SSLCipherStrength | The minimum cipher strength used for bulk encryption. |
SSLClientCACerts | A newline separated list of CA certificates to use during SSL client certificate validation. |
SSLEnabledCipherSuites | The cipher suite to be used in an SSL negotiation. |
SSLEnabledProtocols | Used to enable/disable the supported security protocols. |
SSLEnableRenegotiation | Whether the renegotiation_info SSL extension is supported. |
SSLIncludeCertChain | Whether the entire certificate chain is included in the SSLServerAuthentication event. |
SSLKeyLogFile | The location of a file where per-session secrets are written for debugging purposes. |
SSLNegotiatedCipher | Returns the negotiated cipher suite. |
SSLNegotiatedCipherStrength | Returns the negotiated cipher suite strength. |
SSLNegotiatedCipherSuite | Returns the negotiated cipher suite. |
SSLNegotiatedKeyExchange | Returns the negotiated key exchange algorithm. |
SSLNegotiatedKeyExchangeStrength | Returns the negotiated key exchange algorithm strength. |
SSLNegotiatedVersion | Returns the negotiated protocol version. |
SSLSecurityFlags | Flags that control certificate verification. |
SSLServerCACerts | A newline separated list of CA certificates to use during SSL server certificate validation. |
TLS12SignatureAlgorithms | Defines the allowed TLS 1.2 signature algorithms when SSLProvider is set to Internal. |
TLS12SupportedGroups | The supported groups for ECC. |
TLS13KeyShareGroups | The groups for which to pregenerate key shares. |
TLS13SignatureAlgorithms | The allowed certificate signature algorithms. |
TLS13SupportedGroups | The supported groups for (EC)DHE key exchange. |
BuildInfo | Information about the product's build. |
CodePage | The system code page used for Unicode to Multibyte translations. |
LicenseInfo | Information about the current license. |
MaskSensitiveData | Whether sensitive data is masked in log messages. |
UseInternalSecurityAPI | Whether or not to use the system security libraries or an internal implementation. |
ConnectionBacklog Property (TCPServer Component)
This property includes the maximum number of pending connections maintained by the Transmission Control Protocol (TCP)/IP subsystem.
Syntax
property ConnectionBacklog: Integer read get_ConnectionBacklog write set_ConnectionBacklog;
Default Value
5
Remarks
This property contains the maximum number of pending connections maintained by the TCP/IP subsystem. This value reflects the SOMAXCONN option for the main listening socket. The default value for most systems is 5. You may set this property to a larger value if the server is expected to receive a large number of connections, and queuing them is desirable.
This property is not available at design time.
Connections Property (TCPServer Component)
This property includes a collection of currently connected clients.
Syntax
property Connections: TipwConnectionList read get_Connections;
Remarks
This property contains a collection of currently connected clients. All of the connections may be managed using this property. Each connection is described by the different fields of the Connection type.
This collection is a hash-table type of collection, in which the Connection Id string is used as the key to the desired connection. You may acquire the key for a given connection through the Connected event.
Example (Broadcasting Data)
For i = 0 to Control.ConnectionCount
Control.DataToSend(Control.ConnectionId(i)) = "Broadcast Data"
Next i
This property is read-only.
Please refer to the Connection type for a complete list of fields.DefaultEOL Property (TCPServer Component)
This property includes a default end-of-line (EOL) value to be used by incoming connections.
Syntax
property DefaultEOL: String read get_DefaultEOL write set_DefaultEOL; property DefaultEOLB: TBytes read get_DefaultEOLB write set_DefaultEOLB;
Default Value
''
Remarks
This property contains a default end-of-line (EOL) value to be used by incoming connections. Once the component accepts and establishes an inbound connection, it will set that connection's EOL to the value in this property. By default, this value is empty (""), meaning that data will be fired as it is received.
DefaultIdleTimeout Property (TCPServer Component)
This property includes the default idle timeout for inactive clients.
Syntax
property DefaultIdleTimeout: Integer read get_DefaultIdleTimeout write set_DefaultIdleTimeout;
Default Value
0
Remarks
This property specifies the idle timeout (in seconds) for clients. When set to a positive value, the component will disconnect idle clients after the specified timeout.
This applies only to clients that have not sent or received data within DefaultIdleTimeout seconds.
If set to 0 (default), no idle timeout is applied.
Note: DoEvents must be called for the component to check existing connections.
DefaultMaxLineLength Property (TCPServer Component)
The property includes the default maximum line length value for inbound connections.
Syntax
property DefaultMaxLineLength: Integer read get_DefaultMaxLineLength write set_DefaultMaxLineLength;
Default Value
2048
Remarks
This property controls the default size of an internal buffer that holds received data while waiting for an end-of-line (EOL) string.
The minimum value for this property is 256 bytes. The default value is 2048 bytes.
DefaultSingleLineMode Property (TCPServer Component)
This property tells the component whether or not to treat new connections as line oriented.
Syntax
property DefaultSingleLineMode: Boolean read get_DefaultSingleLineMode write set_DefaultSingleLineMode;
Default Value
false
Remarks
This property instructs the component whether or not to treat newly established connections as line-oriented protocols. If this value is True, newly accepted connections will read the incoming data stream as lines separated by a carriage return line feed (CRLF), carriage return (CR), or line feed (LF) and will ignore the end of lines (EOLs).
DefaultTimeout Property (TCPServer Component)
This property includes an initial timeout value to be used by incoming connections.
Syntax
property DefaultTimeout: Integer read get_DefaultTimeout write set_DefaultTimeout;
Default Value
0
Remarks
This property is used by the component to set the operational timeout value of all inbound connections once they are established.
By default, the timeout is 0, meaning that all inbound connections will behave asynchronously.
KeepAlive Property (TCPServer Component)
When True, KEEPALIVE packets are enabled (for long connections).
Syntax
property KeepAlive: Boolean read get_KeepAlive write set_KeepAlive;
Default Value
false
Remarks
This property enables the SO_KEEPALIVE option on the incoming connections. This option prevents long connections from timing out in case of inactivity.
Note: System Transmission Control Protocol (TCP)/IP stack implementations are not required to support SO_KEEPALIVE.
This property is shared among incoming connections. When the property is set, the corresponding value is set for incoming connections as they are accepted. Existing connections are not modified.
Linger Property (TCPServer Component)
When set to True, connections are terminated gracefully.
Syntax
property Linger: Boolean read get_Linger write set_Linger;
Default Value
true
Remarks
This property controls how a connection is closed. The default is True. In this case, the connection is closed only after all the data are sent. Setting it to False forces an abrupt (hard) disconnection. Any data that were in the sending queue may be lost.
The default behavior (which is also the default mode for stream sockets) might result in an indefinite delay in closing the connection. Although the component returns control immediately, the system might indefinitely hold system resources until all pending data are sent (even after your application closes). This means that valuable system resources might be wasted.
Setting this property to False forces an immediate disconnection. If you know that the other side has received all the data you have sent (e.g., by a client acknowledgment), then setting this property to False might be the appropriate course of action.
This property is shared among incoming connections. When the property is set, the corresponding value is set for incoming connections as they are accepted. Existing connections are not modified.
Listening Property (TCPServer Component)
This property indicates whether the component is listening for incoming connections on LocalPort.
Syntax
property Listening: Boolean read get_Listening;
Default Value
false
Remarks
This property indicates whether the component is listening for connections on the port specified by the LocalPort property. Use the StartListening and StopListening methods to control whether the component is listening.
This property is read-only and not available at design time.
LocalHost Property (TCPServer Component)
The name of the local host or user-assigned IP interface through which connections are initiated or accepted.
Syntax
property LocalHost: String read get_LocalHost write set_LocalHost;
Default Value
''
Remarks
This property contains the name of the local host as obtained by the gethostname() system call, or if the user has assigned an IP address, the value of that address.
In multihomed hosts (machines with more than one IP interface) setting LocalHost to the IP address of an interface will make the component initiate connections (or accept in the case of server components) only through that interface. It is recommended to provide an IP address rather than a hostname when setting this property to ensure the desired interface is used.
If the component is connected, the LocalHost property shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multihomed hosts (machines with more than one IP interface).
Note: LocalHost is not persistent. You must always set it in code, and never in the property window.
LocalPort Property (TCPServer Component)
This property includes the Transmission Control Protocol (TCP) port in the local host where the component listens.
Syntax
property LocalPort: Integer read get_LocalPort write set_LocalPort;
Default Value
0
Remarks
This property must be set before the component can start listening. If its value is 0, then the TCP/IP subsystem picks a port number at random. The port number can be found by checking the value of this property after the component is listening (i.e., after successfully assigning True to the Listening property).
The service port is not shared among servers so two components cannot be listening on the same port at the same time.
SSLAuthenticateClients Property (TCPServer Component)
If set to True, the server asks the client(s) for a certificate.
Syntax
property SSLAuthenticateClients: Boolean read get_SSLAuthenticateClients write set_SSLAuthenticateClients;
Default Value
false
Remarks
This property is used in conjunction with the SSLClientAuthentication event. Please refer to the documentation of the SSLClientAuthentication event for details.
SSLCert Property (TCPServer Component)
The certificate to be used during Secure Sockets Layer (SSL) negotiation.
Syntax
property SSLCert: TipwCertificate read get_SSLCert write set_SSLCert;
Remarks
This property includes the digital certificate that the component will use during SSL negotiation. Set this property to a valid certificate before starting SSL negotiation. To set a certificate, you may set the Encoded field to the encoded certificate. To select a certificate, use the store and subject fields.
Please refer to the Certificate type for a complete list of fields.SSLEnabled Property (TCPServer Component)
This property indicates whether Transport Layer Security/Secure Sockets Layer (TLS/SSL) is enabled.
Syntax
property SSLEnabled: Boolean read get_SSLEnabled write set_SSLEnabled;
Default Value
false
Remarks
This property specifies whether TLS/SSL is enabled in the component. When False (default), the component operates in plaintext mode. When True, TLS/SSL is enabled.
TLS/SSL may also be enabled by setting SSLStartMode. Setting SSLStartMode will automatically update this property value.
This property is not available at design time.
SSLProvider Property (TCPServer Component)
The Secure Sockets Layer/Transport Layer Security (SSL/TLS) implementation to use.
Syntax
property SSLProvider: TipwTSSLProviders read get_SSLProvider write set_SSLProvider;
TipwTSSLProviders = ( sslpAutomatic, sslpPlatform, sslpInternal );
Default Value
sslpAutomatic
Remarks
This property specifies the SSL/TLS implementation to use. In most cases the default value of 0 (Automatic) is recommended and should not be changed. When set to 0 (Automatic), the component will select whether to use the platform implementation or the internal implementation depending on the operating system as well as the TLS version being used.
Possible values are as follows:
0 (sslpAutomatic - default) | Automatically selects the appropriate implementation. |
1 (sslpPlatform) | Uses the platform/system implementation. |
2 (sslpInternal) | Uses the internal implementation. |
In most cases using the default value (Automatic) is recommended. The component will select a provider depending on the current platform.
When Automatic is selected, on Windows, the component will use the platform implementation. On Linux/macOS, the component will use the internal implementation. When TLS 1.3 is enabled via SSLEnabledProtocols, the internal implementation is used on all platforms.
SSLStartMode Property (TCPServer Component)
This property determines how the component starts the Secure Sockets Layer (SSL) negotiation.
Syntax
property SSLStartMode: TipwTSSLStartModes read get_SSLStartMode write set_SSLStartMode;
TipwTSSLStartModes = ( sslAutomatic, sslImplicit, sslExplicit, sslNone );
Default Value
sslNone
Remarks
The SSLStartMode property may have one of the following values:
0 (sslAutomatic) | If the remote port is set to the standard plaintext port of the protocol (where applicable), the component will behave the same as if SSLStartMode is set to sslExplicit. In all other cases, SSL negotiation will be implicit (sslImplicit). |
1 (sslImplicit) | The SSL negotiation will start immediately after the connection is established. |
2 (sslExplicit) | The component will first connect in plaintext, and then will explicitly start SSL negotiation through a protocol command such as STARTTLS. |
3 (sslNone - default) | No SSL negotiation; no SSL security. All communication will be in plaintext mode. |
ChangeRecordLength Method (TCPServer Component)
This method changes the length of received data records.
Syntax
procedure ChangeRecordLength(ConnectionId: Integer; RecordLength: Integer);
Remarks
This method defines the length of data records to be received (in bytes) for the specified ConnectionId.
If RecordLength is set to a positive value, the component will accumulate data until RecordLength bytes of data are received and only then will fire the DataIn event with data of the specified length RecordLength. This allows data to be received as records of known length. This method can be called at any time to change the record length, including within the DataIn event.
A value of 0 (default) means this functionality is not used.
Config Method (TCPServer Component)
Sets or retrieves a configuration setting.
Syntax
function Config(ConfigurationString: String): String;
Remarks
Config is a generic method available in every component. It is used to set and retrieve configuration settings for the component.
These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these internal properties is provided through the Config method.
To set a configuration setting named PROPERTY, you must call Config("PROPERTY=VALUE"), where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).
To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.
Disconnect Method (TCPServer Component)
This method disconnects the specified client.
Syntax
procedure Disconnect(ConnectionId: Integer);
Remarks
Calling this method will disconnect the client specified by the ConnectionId parameter.
DoEvents Method (TCPServer Component)
This method processes events from the internal message queue.
Syntax
procedure DoEvents();
Remarks
When DoEvents is called, the component processes any available events. If no events are available, it waits for a preset period of time, and then returns.
Interrupt Method (TCPServer Component)
This method interrupts a synchronous send to the remote host.
Syntax
procedure Interrupt(ConnectionId: Integer);
Remarks
This property is called using the Connection Id if you wish to interrupt a connection and stop a file from uploading without disconnecting the client connected to the component. If you use SendFile to upload a file, the component will run synchronously on that Connection Id until it is completed.
PauseData Method (TCPServer Component)
This method pauses data reception.
Syntax
procedure PauseData(ConnectionId: Integer);
Remarks
This method pauses data reception for the connection identified by ConnectionId when called. While data reception is paused, the DataIn event will not fire for the specified connection. Call ProcessData to reenable data reception.
ProcessData Method (TCPServer Component)
This method reenables data reception after a call to PauseData .
Syntax
procedure ProcessData(ConnectionId: Integer);
Remarks
This method reenables data reception for the connection identified by ConnectionId after a previous call to PauseData. When PauseData is called, the DataIn event will not fire for the specified connection. To reenable data reception and allow DataIn to fire, call this method.
Note: This method is used only after previously calling PauseData. It does not need to be called to process incoming data by default.
Reset Method (TCPServer Component)
This method will reset the component.
Syntax
procedure Reset();
Remarks
This method will reset the component's properties to their default values.
Send Method (TCPServer Component)
This method sends binary data to the specified client.
Syntax
procedure Send(ConnectionId: Integer; Text: TBytes);
Remarks
This method sends binary data to the client identified by ConnectionId. To send text, use the SendText method instead.
When Timeout is set to 0, the component will behave asynchronously. If you are sending data to the remote host faster than it can process it, or faster than the network's bandwidth allows, the outgoing queue might fill up. When this happens, the operation raises the exception with errorcode 10035 and message '[10035] Operation would block' (WSAEWOULDBLOCK). You can handle this exception, and then try to send the data again. . The BytesSent property shows how many bytes were sent (if any). If 0 bytes were sent, then you can wait for the ReadyToSend event before attempting to send data again.
Note: The ReadyToSend event is not fired when part of the data is sent successfully.
SendBytes Method (TCPServer Component)
This method sends binary data to the specified client.
Syntax
procedure SendBytes(ConnectionId: Integer; Data: TBytes);
Remarks
This method sends binary data to the client identified by ConnectionId. To send text, use the SendText method instead.
When Timeout is set to 0, the component will behave asynchronously. If you are sending data to the remote host faster than it can process it, or faster than the network's bandwidth allows, the outgoing queue might fill up. When this happens, the operation raises the exception with errorcode 10035 and message '[10035] Operation would block' (WSAEWOULDBLOCK). You can handle this exception, and then try to send the data again. . The BytesSent property shows how many bytes were sent (if any). If 0 bytes were sent, then you can wait for the ReadyToSend event before attempting to send data again.
Note: The ReadyToSend event is not fired when part of the data is sent successfully.
SendFile Method (TCPServer Component)
This method sends the file to the remote host.
Syntax
procedure SendFile(ConnectionId: Integer; FileName: String);
Remarks
This method sends the file to the client specified by the ConnectionId.
SendLine Method (TCPServer Component)
This method sends a string followed by a new line.
Syntax
procedure SendLine(ConnectionId: Integer; Text: String);
Remarks
This method is used to send data with line-oriented protocols. The line is followed by CRLF ('#13#10') .
Please refer to the GetLine method and SingleLineMode property for more information.
SendText Method (TCPServer Component)
This method sends text to the specified client.
Syntax
procedure SendText(ConnectionId: Integer; Text: String);
Remarks
This method sends text to the client identified by ConnectionId. To send binary data, use the SendBytes method instead.
When Timeout is set to 0, the component will behave asynchronously. If you are sending data to the remote host faster than it can process it, or faster than the network's bandwidth allows, the outgoing queue might fill up. When this happens, the operation raises the exception with errorcode 10035 and message '[10035] Operation would block' (WSAEWOULDBLOCK). You can handle this exception, and then try to send the data again. . The BytesSent property shows how many bytes were sent (if any). If 0 bytes were sent, then you can wait for the ReadyToSend event before attempting to send data again.
Note: The ReadyToSend event is not fired when part of the data is sent successfully.
Shutdown Method (TCPServer Component)
This method shuts down the server.
Syntax
procedure Shutdown();
Remarks
This method shuts down the server. Calling this method is equivalent to calling StopListening and then breaking every client connection by calling Disconnect.
StartListening Method (TCPServer Component)
This method starts listening for incoming connections.
Syntax
procedure StartListening();
Remarks
This method begins listening for incoming connections on the port specified by LocalPort. Once listening, events will fire as new clients connect and data are transferred.
To stop listening for new connections, call StopListening. To stop listening for new connections and to disconnect all existing clients, call Shutdown.
StartSSL Method (TCPServer Component)
This method starts the Secure Sockets Layer (SSL) negotiation on a connection.
Syntax
procedure StartSSL(ConnectionId: Integer);
Remarks
This method is used to start the SSL negotiation on a plaintext connection. Please refer to the SSLStartMode property for more information.
Note: The Connected event will fire again after the SSL negotiation is complete.
StopListening Method (TCPServer Component)
This method stops listening for new connections.
Syntax
procedure StopListening();
Remarks
This method stops listening for new connections. After being called, any new connection attempts will be rejected. Calling this method does not disconnect existing connections.
To stop listening and to disconnect all existing clients, call Shutdown instead.
Connected Event (TCPServer Component)
This event is fired immediately after a connection completes (or fails).
Syntax
type TConnectedEvent = procedure ( Sender: TObject; ConnectionId: Integer; StatusCode: Integer; const Description: String ) of Object;
property OnConnected: TConnectedEvent read FOnConnected write FOnConnected;
Remarks
If the connection is made normally, StatusCode is 0, and Description is 'OK'.
If the connection fails, StatusCode has the error code returned by the system. Description contains a description of this code. The value of StatusCode is equal to the value of the system error.
Please refer to the Error Codes section for more information.
ConnectionRequest Event (TCPServer Component)
This event is fired when a request for connection comes from a remote host.
Syntax
type TConnectionRequestEvent = procedure ( Sender: TObject; const Address: String; Port: Integer; var Accept: Boolean ) of Object;
property OnConnectionRequest: TConnectionRequestEvent read FOnConnectionRequest write FOnConnectionRequest;
Remarks
This event indicates an incoming connection. The connection is accepted by default. Address and Port will contain information about the remote host requesting the inbound connection. If you want to refuse it, you can set the Accept parameter to False.
DataIn Event (TCPServer Component)
This event is fired when data come in.
Syntax
type TDataInEvent = procedure ( Sender: TObject; ConnectionId: Integer; const Text: String; const TextB: TBytes; EOL: Boolean ) of Object;
property OnDataIn: TDataInEvent read FOnDataIn write FOnDataIn;
Remarks
Trapping the DataIn event is your only chance to get the data coming from the other end of the connection specified by ConnectionId. The incoming data are provided through the Text parameter.
EOL indicates whether or not the EOL string was found at the end of Text. If the EOL string was found, then EOL is True.
If Text is part of the data portion of length larger than either DefaultMaxLineLength or MaxLineLength with no EOL strings in it, then EOL is False. Please note that this means that one or more DataIn events with EOL set to False can be received during a connection.
If the EOL property is '' (empty string), then EOL can be disregarded (it is always True).
Note: Events are not re-entrant. Performing time-consuming operations within this event will prevent it from firing again in a timely manner and may affect overall performance.
Disconnected Event (TCPServer Component)
This event is fired when a connection is closed.
Syntax
type TDisconnectedEvent = procedure ( Sender: TObject; ConnectionId: Integer; StatusCode: Integer; const Description: String ) of Object;
property OnDisconnected: TDisconnectedEvent read FOnDisconnected write FOnDisconnected;
Remarks
If the connection is broken normally, StatusCode is 0, and Description is 'OK'.
If the connection is broken for any other reason, StatusCode has the error code returned by the system. Description contains a description of this code. The value of StatusCode is equal to the value of the system error.
Please refer to the Error Codes section for more information.
Error Event (TCPServer Component)
This event fires information about errors during data delivery.
Syntax
type TErrorEvent = procedure ( Sender: TObject; ConnectionId: Integer; ErrorCode: Integer; const Description: String ) of Object;
property OnError: TErrorEvent read FOnError write FOnError;
Remarks
The Error event is fired in case of exceptional conditions during message processing. Normally, the component raises an exception.
ErrorCode contains an error code and Description contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Error Codes section.
ConnectionId indicates the connection for which the error is applicable.
ReadyToSend Event (TCPServer Component)
This event is fired when the component is ready to send data.
Syntax
type TReadyToSendEvent = procedure ( Sender: TObject; ConnectionId: Integer ) of Object;
property OnReadyToSend: TReadyToSendEvent read FOnReadyToSend write FOnReadyToSend;
Remarks
The ReadyToSend event indicates that the underlying Transmission Control Protocol (TCP)/IP subsystem is ready to accept data after a failed Send. This event is also fired immediately after a connection is established.
SSLClientAuthentication Event (TCPServer Component)
This event is fired when the client presents its credentials to the server.
Syntax
type TSSLClientAuthenticationEvent = procedure ( Sender: TObject; ConnectionId: Integer; const CertEncoded: String; const CertEncodedB: TBytes; const CertSubject: String; const CertIssuer: String; const Status: String; var Accept: Boolean ) of Object;
property OnSSLClientAuthentication: TSSLClientAuthenticationEvent read FOnSSLClientAuthentication write FOnSSLClientAuthentication;
Remarks
This event enables the server to decide whether or not to continue. The Accept parameter is a recommendation on whether to continue or to close the connection. This is just a suggestion: application software must use its own logic to determine whether or not to continue.
When Accept is False, Status shows why the verification failed (otherwise, Status contains the string "OK").
SSLConnectionRequest Event (TCPServer Component)
This event fires when a Secure Sockets Layer (SSL) connection is requested.
Syntax
type TSSLConnectionRequestEvent = procedure ( Sender: TObject; ConnectionId: Integer; const SupportedCipherSuites: String; const SupportedSignatureAlgs: String; var CertStoreType: Integer; var CertStore: String; var CertPassword: String; var CertSubject: String ) of Object;
property OnSSLConnectionRequest: TSSLConnectionRequestEvent read FOnSSLConnectionRequest write FOnSSLConnectionRequest;
Remarks
This event fires when an SSL connection is requested and SSLProvider is set to Internal. This event provides an opportunity to select an alternative certificate to the connecting client. This event does not fire when SSLProvider is set to Platform.
This event allows the component to be configured to use both RSA and ECDSA certificates depending on the connecting client's capabilities.
ConnectionId is the connection Id of the client requesting the connection.
SupportedCipherSuites is a comma-separated list of cipher suites that the client supports.
SupportedSignatureAlgs is a comma-separated list of certificate signature algorithms that the client supports.
CertStoreType is the store type of the alternate certificate to use for this connection. The component supports both public and private keys in a variety of formats. When the cstAuto value is used, the component will automatically determine the type. This property can take one of the following values:
0 (cstUser - default) | For Windows, this specifies that the certificate store is a certificate store owned by the current user.
Note: This store type is not available in Java. |
1 (cstMachine) | For Windows, this specifies that the certificate store is a machine store.
Note: This store type is not available in Java. |
2 (cstPFXFile) | The certificate store is the name of a PFX (PKCS#12) file containing certificates. |
3 (cstPFXBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in PFX (PKCS#12) format. |
4 (cstJKSFile) | The certificate store is the name of a Java Key Store (JKS) file containing certificates.
Note: This store type is only available in Java. |
5 (cstJKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in Java Key Store (JKS) format.
Note: This store type is only available in Java. |
6 (cstPEMKeyFile) | The certificate store is the name of a PEM-encoded file that contains a private key and an optional certificate. |
7 (cstPEMKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a private key and an optional certificate. |
8 (cstPublicKeyFile) | The certificate store is the name of a file that contains a PEM- or DER-encoded public key certificate. |
9 (cstPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a PEM- or DER-encoded public key certificate. |
10 (cstSSHPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains an SSH-style public key. |
11 (cstP7BFile) | The certificate store is the name of a PKCS#7 file containing certificates. |
12 (cstP7BBlob) | The certificate store is a string (binary) representing a certificate store in PKCS#7 format. |
13 (cstSSHPublicKeyFile) | The certificate store is the name of a file that contains an SSH-style public key. |
14 (cstPPKFile) | The certificate store is the name of a file that contains a PPK (PuTTY Private Key). |
15 (cstPPKBlob) | The certificate store is a string (binary) that contains a PPK (PuTTY Private Key). |
16 (cstXMLFile) | The certificate store is the name of a file that contains a certificate in XML format. |
17 (cstXMLBlob) | The certificate store is a string that contains a certificate in XML format. |
18 (cstJWKFile) | The certificate store is the name of a file that contains a JWK (JSON Web Key). |
19 (cstJWKBlob) | The certificate store is a string that contains a JWK (JSON Web Key). |
21 (cstBCFKSFile) | The certificate store is the name of a file that contains a BCFKS (Bouncy Castle FIPS Key Store).
Note: This store type is only available in Java and .NET. |
22 (cstBCFKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in BCFKS (Bouncy Castle FIPS Key Store) format.
Note: This store type is only available in Java and .NET. |
23 (cstPKCS11) | The certificate is present on a physical security key accessible via a PKCS#11 interface.
To use a security key, the necessary data must first be collected using the CertMgr component. The ListStoreCertificates method may be called after setting CertStoreType to cstPKCS11, CertStorePassword to the PIN, and CertStore to the full path of the PKCS#11 DLL. The certificate information returned in the CertList event's CertEncoded parameter may be saved for later use. When using a certificate, pass the previously saved security key information as the Store and set StorePassword to the PIN. Code Example. SSH Authentication with Security Key:
|
99 (cstAuto) | The store type is automatically detected from the input data. This setting may be used with both public and private keys and can detect any of the supported formats automatically. |
CertStore is the store name or location of the alternate certificate to use for this connection.
Designations of certificate stores are platform dependent.
The following designations are the most common User and Machine certificate stores in Windows:
MY | A certificate store holding personal certificates with their associated private keys. |
CA | Certifying authority certificates. |
ROOT | Root certificates. |
When the certificate store type is cstPFXFile, this property must be set to the name of the file. When the type is cstPFXBlob, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store).
CertPassword is the password of the certificate store containing the alternate certificate to use for this connection.
CertSubject is the subject of the alternate certificate to use for this connection.
The special value * matches any subject and will select the first certificate in the store. The certificate subject is a comma-separated list of distinguished name fields and values. For instance, "CN=www.server.com, OU=test, C=US, E=support@nsoftware.com". Common fields and their meanings are as follows:
Field | Meaning |
CN | Common Name. This is commonly a hostname like www.server.com. |
O | Organization |
OU | Organizational Unit |
L | Locality |
S | State |
C | Country |
E | Email Address |
If a field value contains a comma, it must be quoted.
SSLStatus Event (TCPServer Component)
This event is fired to show the progress of the secure connection.
Syntax
type TSSLStatusEvent = procedure ( Sender: TObject; ConnectionId: Integer; const Message: String ) of Object;
property OnSSLStatus: TSSLStatusEvent read FOnSSLStatus write FOnSSLStatus;
Remarks
The event is fired for informational and logging purposes only. It is used to track the progress of the connection.
Certificate Type
This is the digital certificate being used.
Remarks
This type describes the current digital certificate. The certificate may be a public or private key. The fields are used to identify or select certificates.
Fields
EffectiveDate
String (read-only)
Default Value: ""
The date on which this certificate becomes valid. Before this date, it is not valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:
23-Jan-2000 15:00:00.
ExpirationDate
String (read-only)
Default Value: ""
The date on which the certificate expires. After this date, the certificate will no longer be valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:
23-Jan-2001 15:00:00.
ExtendedKeyUsage
String (read-only)
Default Value: ""
A comma-delimited list of extended key usage identifiers. These are the same as ASN.1 object identifiers (OIDs).
Fingerprint
String (read-only)
Default Value: ""
The hex-encoded, 16-byte MD5 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.
The following example illustrates the format: bc:2a:72:af:fe:58:17:43:7a:5f:ba:5a:7c:90:f7:02
FingerprintSHA1
String (read-only)
Default Value: ""
The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.
The following example illustrates the format: 30:7b:fa:38:65:83:ff:da:b4:4e:07:3f:17:b8:a4:ed:80:be:ff:84
FingerprintSHA256
String (read-only)
Default Value: ""
The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.
The following example illustrates the format: 6a:80:5c:33:a9:43:ea:b0:96:12:8a:64:96:30:ef:4a:8a:96:86:ce:f4:c7:be:10:24:8e:2b:60:9e:f3:59:53
Issuer
String (read-only)
Default Value: ""
The issuer of the certificate. This property contains a string representation of the name of the issuing authority for the certificate.
PrivateKey
String (read-only)
Default Value: ""
The private key of the certificate (if available). The key is provided as PEM/Base64-encoded data.
Note: The PrivateKey may be available but not exportable. In this case, PrivateKey returns an empty string.
PrivateKeyAvailable
Boolean (read-only)
Default Value: False
Whether a PrivateKey is available for the selected certificate. If PrivateKeyAvailable is True, the certificate may be used for authentication purposes (e.g., server authentication).
PrivateKeyContainer
String (read-only)
Default Value: ""
The name of the PrivateKey container for the certificate (if available). This functionality is available only on Windows platforms.
PublicKey
String (read-only)
Default Value: ""
The public key of the certificate. The key is provided as PEM/Base64-encoded data.
PublicKeyAlgorithm
String (read-only)
Default Value: ""
The textual description of the certificate's public key algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_DH") or an object identifier (OID) string representing the algorithm.
PublicKeyLength
Integer (read-only)
Default Value: 0
The length of the certificate's public key (in bits). Common values are 512, 1024, and 2048.
SerialNumber
String (read-only)
Default Value: ""
The serial number of the certificate encoded as a string. The number is encoded as a series of hexadecimal digits, with each pair representing a byte of the serial number.
SignatureAlgorithm
String (read-only)
Default Value: ""
The text description of the certificate's signature algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_MD5RSA") or an object identifier (OID) string representing the algorithm.
Store
String
Default Value: "MY"
The name of the certificate store for the client certificate.
The StoreType property denotes the type of the certificate store specified by Store. If the store is password-protected, specify the password in StorePassword.
Store is used in conjunction with the Subject property to specify client certificates. If Store has a value, and Subject or Encoded is set, a search for a certificate is initiated. Please see the Subject property for details.
Designations of certificate stores are platform dependent.
The following designations are the most common User and Machine certificate stores in Windows:
MY | A certificate store holding personal certificates with their associated private keys. |
CA | Certifying authority certificates. |
ROOT | Root certificates. |
When the certificate store type is cstPFXFile, this property must be set to the name of the file. When the type is cstPFXBlob, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store).
StoreB
TBytes
Default Value: "MY"
The name of the certificate store for the client certificate.
The StoreType property denotes the type of the certificate store specified by Store. If the store is password-protected, specify the password in StorePassword.
Store is used in conjunction with the Subject property to specify client certificates. If Store has a value, and Subject or Encoded is set, a search for a certificate is initiated. Please see the Subject property for details.
Designations of certificate stores are platform dependent.
The following designations are the most common User and Machine certificate stores in Windows:
MY | A certificate store holding personal certificates with their associated private keys. |
CA | Certifying authority certificates. |
ROOT | Root certificates. |
When the certificate store type is cstPFXFile, this property must be set to the name of the file. When the type is cstPFXBlob, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store).
StorePassword
String
Default Value: ""
If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.
StoreType
TipwCertStoreTypes
Default Value: 0
The type of certificate store for this certificate.
The component supports both public and private keys in a variety of formats. When the cstAuto value is used, the component will automatically determine the type. This property can take one of the following values:
0 (cstUser - default) | For Windows, this specifies that the certificate store is a certificate store owned by the current user.
Note: This store type is not available in Java. |
1 (cstMachine) | For Windows, this specifies that the certificate store is a machine store.
Note: This store type is not available in Java. |
2 (cstPFXFile) | The certificate store is the name of a PFX (PKCS#12) file containing certificates. |
3 (cstPFXBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in PFX (PKCS#12) format. |
4 (cstJKSFile) | The certificate store is the name of a Java Key Store (JKS) file containing certificates.
Note: This store type is only available in Java. |
5 (cstJKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in Java Key Store (JKS) format.
Note: This store type is only available in Java. |
6 (cstPEMKeyFile) | The certificate store is the name of a PEM-encoded file that contains a private key and an optional certificate. |
7 (cstPEMKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a private key and an optional certificate. |
8 (cstPublicKeyFile) | The certificate store is the name of a file that contains a PEM- or DER-encoded public key certificate. |
9 (cstPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a PEM- or DER-encoded public key certificate. |
10 (cstSSHPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains an SSH-style public key. |
11 (cstP7BFile) | The certificate store is the name of a PKCS#7 file containing certificates. |
12 (cstP7BBlob) | The certificate store is a string (binary) representing a certificate store in PKCS#7 format. |
13 (cstSSHPublicKeyFile) | The certificate store is the name of a file that contains an SSH-style public key. |
14 (cstPPKFile) | The certificate store is the name of a file that contains a PPK (PuTTY Private Key). |
15 (cstPPKBlob) | The certificate store is a string (binary) that contains a PPK (PuTTY Private Key). |
16 (cstXMLFile) | The certificate store is the name of a file that contains a certificate in XML format. |
17 (cstXMLBlob) | The certificate store is a string that contains a certificate in XML format. |
18 (cstJWKFile) | The certificate store is the name of a file that contains a JWK (JSON Web Key). |
19 (cstJWKBlob) | The certificate store is a string that contains a JWK (JSON Web Key). |
21 (cstBCFKSFile) | The certificate store is the name of a file that contains a BCFKS (Bouncy Castle FIPS Key Store).
Note: This store type is only available in Java and .NET. |
22 (cstBCFKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in BCFKS (Bouncy Castle FIPS Key Store) format.
Note: This store type is only available in Java and .NET. |
23 (cstPKCS11) | The certificate is present on a physical security key accessible via a PKCS#11 interface.
To use a security key, the necessary data must first be collected using the CertMgr component. The ListStoreCertificates method may be called after setting CertStoreType to cstPKCS11, CertStorePassword to the PIN, and CertStore to the full path of the PKCS#11 DLL. The certificate information returned in the CertList event's CertEncoded parameter may be saved for later use. When using a certificate, pass the previously saved security key information as the Store and set StorePassword to the PIN. Code Example. SSH Authentication with Security Key:
|
99 (cstAuto) | The store type is automatically detected from the input data. This setting may be used with both public and private keys and can detect any of the supported formats automatically. |
SubjectAltNames
String (read-only)
Default Value: ""
Comma-separated lists of alternative subject names for the certificate.
ThumbprintMD5
String (read-only)
Default Value: ""
The MD5 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.
ThumbprintSHA1
String (read-only)
Default Value: ""
The SHA-1 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.
ThumbprintSHA256
String (read-only)
Default Value: ""
The SHA-256 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.
Usage
String (read-only)
Default Value: ""
The text description of UsageFlags.
This value will be one or more of the following strings and will be separated by commas:
- Digital Signature
- Non-Repudiation
- Key Encipherment
- Data Encipherment
- Key Agreement
- Certificate Signing
- CRL Signing
- Encipher Only
If the provider is OpenSSL, the value is a comma-separated list of X.509 certificate extension names.
UsageFlags
Integer (read-only)
Default Value: 0
The flags that show intended use for the certificate. The value of UsageFlags is a combination of the following flags:
0x80 | Digital Signature |
0x40 | Non-Repudiation |
0x20 | Key Encipherment |
0x10 | Data Encipherment |
0x08 | Key Agreement |
0x04 | Certificate Signing |
0x02 | CRL Signing |
0x01 | Encipher Only |
Please see the Usage property for a text representation of UsageFlags.
This functionality currently is not available when the provider is OpenSSL.
Version
String (read-only)
Default Value: ""
The certificate's version number. The possible values are the strings "V1", "V2", and "V3".
Subject
String
Default Value: ""
The subject of the certificate used for client authentication.
This property must be set after all other certificate properties are set. When this property is set, a search is performed in the current certificate store to locate a certificate with a matching subject.
If a matching certificate is found, the property is set to the full subject of the matching certificate.
If an exact match is not found, the store is searched for subjects containing the value of the property.
If a match is still not found, the property is set to an empty string, and no certificate is selected.
The special value "*" picks a random certificate in the certificate store.
The certificate subject is a comma-separated list of distinguished name fields and values. For instance, "CN=www.server.com, OU=test, C=US, E=support@nsoftware.com". Common fields and their meanings are as follows:
Field | Meaning |
CN | Common Name. This is commonly a hostname like www.server.com. |
O | Organization |
OU | Organizational Unit |
L | Locality |
S | State |
C | Country |
E | Email Address |
If a field value contains a comma, it must be quoted.
Encoded
String
Default Value: ""
The certificate (PEM/Base64 encoded). This property is used to assign a specific certificate. The Store and Subject properties also may be used to specify a certificate.
When Encoded is set, a search is initiated in the current Store for the private key of the certificate. If the key is found, Subject is updated to reflect the full subject of the selected certificate; otherwise, Subject is set to an empty string.
EncodedB
TBytes
Default Value: ""
The certificate (PEM/Base64 encoded). This property is used to assign a specific certificate. The Store and Subject properties also may be used to specify a certificate.
When Encoded is set, a search is initiated in the current Store for the private key of the certificate. If the key is found, Subject is updated to reflect the full subject of the selected certificate; otherwise, Subject is set to an empty string.
Constructors
>
constructor Create();
Creates a instance whose properties can be set. This is useful for use with when generating new certificates.
constructor Create(valEncoded: TBytes);
Parses Encoded as an X.509 public key.
constructor Create(valStoreType: TipwCertStoreTypes; valStore: String; valStorePassword: String; valSubject: String);
StoreType identifies the type of certificate store to use. See for descriptions of the different certificate stores. Store is a file containing the certificate store. StorePassword is the password used to protect the store.
After the store has been successfully opened, the component will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The Subject parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format.
constructor Create(valStoreType: TipwCertStoreTypes; valStore: TBytes; valStorePassword: String; valSubject: String);
StoreType identifies the type of certificate store to use. See for descriptions of the different certificate stores. Store is a byte array containing the certificate data. StorePassword is the password used to protect the store.
After the store has been successfully opened, the component will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The Subject parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format.
Connection Type
This is a currently connected client.
Remarks
This type describes the connection of a client that is currently connected to the component. You may use the different fields of this type to manage the connection.
Fields
AcceptData
Boolean (read-only)
Default Value: True
This property indicates whether data reception is currently enabled. When False, data reception is disabled and the DataIn event will not fire for the connection. Use the PauseData and ProcessData methods to pause and resume data reception.
BytesSent
Integer (read-only)
Default Value: 0
This property shows how many bytes were sent after calling Send or SendBytes. Please see Send or SendBytes for more information.
Note: This property will always return 0 when the component is operating in the synchronous mode (i.e., the Timeout property is set to a positive value).
Connected
Boolean (read-only)
Default Value: False
This property indicates the status of individual connections.
When True, the connection is established. Use the Disconnect method to disconnect an existing connection.
ConnectionId
Integer (read-only)
Default Value: 0
This property contains an identifier generated by the component to identify each connection. This identifier is unique to this connection.
EOL
String
Default Value: ""
The EOL property is used to define boundaries in the input stream using the value of the property.
The EOL property is especially useful with ASCII files. By setting it to CRLF ('#13#10') , the incoming ASCII text stream can be split into lines. In this case, one event is fired for each line received (as well as in packet boundaries). The CRLF ('#13#10') . bytes are discarded.
The EOL property is a binary string. This means that it can be more than one byte long, and it can contain NULL bytes.
EOLB
TBytes
Default Value: ""
The EOL property is used to define boundaries in the input stream using the value of the property.
The EOL property is especially useful with ASCII files. By setting it to CRLF ('#13#10') , the incoming ASCII text stream can be split into lines. In this case, one event is fired for each line received (as well as in packet boundaries). The CRLF ('#13#10') . bytes are discarded.
The EOL property is a binary string. This means that it can be more than one byte long, and it can contain NULL bytes.
IdleTimeout
Integer
Default Value: 0
This property contains the idle timeout for this connection. This property is similar to DefaultIdleTimeout but may be set on a per-connection basis to override DefaultIdleTimeout. This property specifies the idle timeout (in seconds) for the connected client. When set to a positive value, the component will disconnect idle clients after the specified timeout.
This applies only to clients that have not sent to received data within the specified number of seconds.
If set to 0 (default), no idle timeout is applied.
Note: DoEvents must be called for the component to check existing connections.
LocalAddress
String (read-only)
Default Value: ""
This property shows the IP address of the interface through which the connection is passing.
LocalAddress is important for multihomed hosts so that it can be used to find the particular network interface through which an individual connection is going.
MaxLineLength
Integer
Default Value: 2048
This property is the size of an internal buffer that holds received data while waiting for an EOL string.
If an EOL string is found in the input stream before MaxLineLength bytes are received, the DataIn event is fired with the EOL parameter set to True, and the buffer is reset.
If no EOL is found, and MaxLineLength bytes are accumulated in the buffer, the DataIn event is fired with the EOL parameter set to False, and the buffer is reset.
The minimum value for MaxLineLength is 256 bytes. The default value is 2048 bytes.
ReadyToSend
Boolean (read-only)
Default Value: False
This property indicates whether the component is ready to send data.
This is True after a client connects but will become False after a failed call to Send or SendBytes. After a failed call to Send or SendBytes, the ReadyToSend event will fire and this property will be True when data can be sent again.
RecordLength
Integer (read-only)
Default Value: 0
This property holds the current record length set by ChangeRecordLength. When this value is a positive number, the component will accumulate data until RecordLength is reached and only then will fire the DataIn event with the data of length RecordLength. This allows data to be received as records of known length. This value can be changed at any time by calling ChangeRecordLength, including within the DataIn event.
A value of 0 (default) means this setting is not used.
RemoteHost
String (read-only)
Default Value: ""
This property shows the IP address of the remote host through which the connection is coming.
The connection must be valid or an error will be fired.
If the component is configured to use a SOCKS firewall, the value assigned to this property may be preceded with an "*". If this is the case, the host name is passed to the firewall unresolved and the firewall performs the DNS resolution.
RemotePort
Integer (read-only)
Default Value: 0
This property shows the Transmission Control Protocol (TCP) port on the remote host through which the connection is coming.
The connection must be valid or an error will be fired.
SingleLineMode
Boolean
Default Value: False
This property shows the special mode for line-oriented protocols. When SingleLineMode is True, the component treats the incoming data stream as lines separated by carriage return (CR), line feed (LF), or CRLF. The EOL property is ignored.
Timeout
Integer
Default Value: 0
This property specifies a timeout for the component.
If the Timeout property is set to 0, all operations return immediately, potentially failing with a WOULDBLOCK error if data cannot be sent immediately.
If Timeout is set to a positive value, data is sent in a blocking manner and the component will wait for the operation to complete before returning control. The component will handle any potential WOULDBLOCK errors internally and automatically retry the operation for a maximum of Timeout seconds.
The component will use DoEvents to enter an efficient wait loop during any potential waiting period, making sure that all system events are processed immediately as they arrive. This ensures that the host application does not freeze and remains responsive.
If Timeout expires, and the operation is not yet complete, the component raises an exception.
Note: By default, all timeouts are inactivity timeouts, that is, the timeout period is extended by Timeout seconds when any amount of data is successfully sent or received.
The default value for the Timeout property is 0 (asynchronous operation).
UserData
String
Default Value: ""
The UserData property holds connection-specific user-specified data.
User-specified data may be set or retrieved at any point while the connection is valid. This provides a simple way to associate arbitrary data with a specific connection.
UserDataB
TBytes
Default Value: ""
The UserData property holds connection-specific user-specified data.
User-specified data may be set or retrieved at any point while the connection is valid. This provides a simple way to associate arbitrary data with a specific connection.
Constructors
constructor Create();
Config Settings (TCPServer Component)
The component accepts one or more of the following configuration settings. Configuration settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these internal properties is provided through the Config method.TCPServer Config Settings
When a client connects, the client's address is checked against the list defined here. If there is no match, the ConnectionRequest event fires with an Accept value set to False. If no action is taken within the ConnectionRequest event, the client will be disconnected.
When a client connects, the client's address is checked against the list defined here. If there is a match, the ConnectionRequest event fires with an Accept value set to False. If no action is taken within the ConnectionRequest event, the client will not be connected.
Note: This is applicable only to incoming SSL connections. This should be set only if there is a specific reason to do so.
Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the component is activated, the InBufferSize reverts to its defined size. The same thing will happen if you attempt to make it too large or too small.
InBufferSize is shared among incoming connections. When the property is set, the corresponding value is set for incoming connections as they are accepted. Existing connections are not modified.
Note: This value is not applicable in macOS.
Note: Unix/Linux operating systems limit the number of simultaneous connections to 1024.
Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the component is activated the OutBufferSize reverts to its defined size. The same thing will happen if you attempt to make it too large or too small.
OutBufferSize is shared among incoming connections. When the property is set, the corresponding value is set for incoming connections as they are accepted. Existing connections are not modified.
By default, this configuration setting is set to False.
0 | IPv4 Only |
1 | IPv6 Only |
2 | IPv6 and IPv4 |
SSL Config Settings
When enabled, SSL packet logs are output using the SSLStatus event, which will fire each time an SSL packet is sent or received.
Enabling this configuration setting has no effect if SSLProvider is set to Platform.
The path set by this property should point to a directory containing CA certificates in PEM format. The files each contain one CA certificate. The files are looked up by the CA subject name hash value, which must hence be available. If more than one CA certificate with the same name hash value exist, the extension must be different (e.g., 9d66eef0.0, 9d66eef0.1). OpenSSL recommends the use of the c_rehash utility to create the necessary links. Please refer to the OpenSSL man page SSL_CTX_load_verify_locations(3) for details.
The file set by this property should contain a list of CA certificates in PEM format. The file can contain several CA certificates identified by the following sequences:
-----BEGIN CERTIFICATE-----
... (CA certificate in base64 encoding) ...
-----END CERTIFICATE-----
Before, between, and after the certificate text is allowed, which can be used, for example, for descriptions of the certificates. Refer to the OpenSSL man page SSL_CTX_load_verify_locations(3) for details.
The format of this string is described in the OpenSSL man page ciphers(1) section "CIPHER LIST FORMAT". Please refer to it for details. The default string "DEFAULT" is determined at compile time and is normally equivalent to "ALL:!ADH:RC4+RSA:+SSLv2:@STRENGTH".
By default, OpenSSL uses the device file "/dev/urandom" to seed the PRNG, and setting OpenSSLPrngSeedData is not required. If set, the string specified is used to seed the PRNG.
If set to True, the component will reuse the context if and only if the following criteria are met:
- The target host name is the same.
- The system cache entry has not expired (default timeout is 10 hours).
- The application process that calls the function is the same.
- The logon session is the same.
- The instance of the component is the same.
-----BEGIN CERTIFICATE----- MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw ... Intermediate Cert ... eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w F0I1XhM+pKj7FjDr+XNj -----END CERTIFICATE----- \r \n -----BEGIN CERTIFICATE----- MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp ... Root Cert ... d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA -----END CERTIFICATE-----
When set to 0 (default), the CRL check will not be performed by the component. When set to 1, it will attempt to perform the CRL check, but it will continue without an error if the server's certificate does not support CRL. When set to 2, it will perform the CRL check and will throw an error if CRL is not supported.
This configuration setting is supported only in the Java, C#, and C++ editions. In the C++ edition, it is supported only on Windows operating systems.
When set to 0 (default), the component will not perform an OCSP check. When set to 1, it will attempt to perform the OCSP check, but it will continue without an error if the server's certificate does not support OCSP. When set to 2, it will perform the OCSP check and will throw an error if OCSP is not supported.
This configuration setting is supported only in the Java, C#, and C++ editions. In the C++ edition, it is supported only on Windows operating systems.
Note: This configuration setting contains the minimum cipher strength requested from the security library. The actual cipher strength used for the connection is shown by the SSLStatus event.
Use this configuration setting with caution. Requesting a lower cipher strength than necessary could potentially cause serious security vulnerabilities in your application.
When the provider is OpenSSL, SSLCipherStrength is currently not supported. This functionality is instead made available through the OpenSSLCipherList configuration setting.
The value of this configuration setting is a newline-separated (CR/LF) list of certificates. For instance:
-----BEGIN CERTIFICATE----- MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw ... Intermediate Cert ... eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w F0I1XhM+pKj7FjDr+XNj -----END CERTIFICATE----- \r \n -----BEGIN CERTIFICATE----- MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp ... Root Cert ... d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA -----END CERTIFICATE-----
By default, the enabled cipher suites will include all available ciphers ("*").
The special value "*" means that the component will pick all of the supported cipher suites. If SSLEnabledCipherSuites is set to any other value, only the specified cipher suites will be considered.
Multiple cipher suites are separated by semicolons.
Example values when SSLProvider is set to Platform include the following:
obj.config("SSLEnabledCipherSuites=*");
obj.config("SSLEnabledCipherSuites=CALG_AES_256");
obj.config("SSLEnabledCipherSuites=CALG_AES_256;CALG_3DES");
Possible values when SSLProvider is set to Platform include the following:
- CALG_3DES
- CALG_3DES_112
- CALG_AES
- CALG_AES_128
- CALG_AES_192
- CALG_AES_256
- CALG_AGREEDKEY_ANY
- CALG_CYLINK_MEK
- CALG_DES
- CALG_DESX
- CALG_DH_EPHEM
- CALG_DH_SF
- CALG_DSS_SIGN
- CALG_ECDH
- CALG_ECDH_EPHEM
- CALG_ECDSA
- CALG_ECMQV
- CALG_HASH_REPLACE_OWF
- CALG_HUGHES_MD5
- CALG_HMAC
- CALG_KEA_KEYX
- CALG_MAC
- CALG_MD2
- CALG_MD4
- CALG_MD5
- CALG_NO_SIGN
- CALG_OID_INFO_CNG_ONLY
- CALG_OID_INFO_PARAMETERS
- CALG_PCT1_MASTER
- CALG_RC2
- CALG_RC4
- CALG_RC5
- CALG_RSA_KEYX
- CALG_RSA_SIGN
- CALG_SCHANNEL_ENC_KEY
- CALG_SCHANNEL_MAC_KEY
- CALG_SCHANNEL_MASTER_HASH
- CALG_SEAL
- CALG_SHA
- CALG_SHA1
- CALG_SHA_256
- CALG_SHA_384
- CALG_SHA_512
- CALG_SKIPJACK
- CALG_SSL2_MASTER
- CALG_SSL3_MASTER
- CALG_SSL3_SHAMD5
- CALG_TEK
- CALG_TLS1_MASTER
- CALG_TLS1PRF
obj.config("SSLEnabledCipherSuites=*");
obj.config("SSLEnabledCipherSuites=TLS_DHE_DSS_WITH_AES_128_CBC_SHA");
obj.config("SSLEnabledCipherSuites=TLS_DHE_DSS_WITH_AES_128_CBC_SHA;TLS_ECDH_RSA_WITH_AES_128_CBC_SHA");
Possible values when SSLProvider is set to Internal include the following:
- TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
- TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
- TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
- TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
- TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384
- TLS_RSA_WITH_AES_256_GCM_SHA384
- TLS_RSA_WITH_AES_128_GCM_SHA256
- TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256
- TLS_DHE_DSS_WITH_AES_256_GCM_SHA384
- TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
- TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384
- TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256
- TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
- TLS_DHE_DSS_WITH_AES_128_GCM_SHA256
- TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
- TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
- TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384
- TLS_DHE_DSS_WITH_AES_256_CBC_SHA256
- TLS_RSA_WITH_AES_256_CBC_SHA256
- TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
- TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384
- TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
- TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
- TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
- TLS_RSA_WITH_AES_128_CBC_SHA256
- TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256
- TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256
- TLS_DHE_DSS_WITH_AES_128_CBC_SHA256
- TLS_RSA_WITH_AES_256_CBC_SHA
- TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
- TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
- TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA
- TLS_DHE_RSA_WITH_AES_256_CBC_SHA
- TLS_ECDH_RSA_WITH_AES_256_CBC_SHA
- TLS_DHE_DSS_WITH_AES_256_CBC_SHA
- TLS_RSA_WITH_AES_128_CBC_SHA
- TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
- TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
- TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA
- TLS_ECDH_RSA_WITH_AES_128_CBC_SHA
- TLS_DHE_RSA_WITH_AES_128_CBC_SHA
- TLS_DHE_DSS_WITH_AES_128_CBC_SHA
- TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA
- TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
- TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA
- TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA
- TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA
- TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA
- TLS_RSA_WITH_3DES_EDE_CBC_SHA
- TLS_RSA_WITH_DES_CBC_SHA
- TLS_DHE_RSA_WITH_DES_CBC_SHA
- TLS_DHE_DSS_WITH_DES_CBC_SHA
- TLS_RSA_WITH_RC4_128_MD5
- TLS_RSA_WITH_RC4_128_SHA
When TLS 1.3 is negotiated (see SSLEnabledProtocols), only the following cipher suites are supported:
- TLS_AES_256_GCM_SHA384
- TLS_CHACHA20_POLY1305_SHA256
- TLS_AES_128_GCM_SHA256
SSLEnabledCipherSuites is used together with SSLCipherStrength.
Not all supported protocols are enabled by default. The default value is 4032 for client components, and 3072 for server components. To specify a combination of enabled protocol versions set this config to the binary OR of one or more of the following values:
TLS1.3 | 12288 (Hex 3000) |
TLS1.2 | 3072 (Hex C00) (Default - Client and Server) |
TLS1.1 | 768 (Hex 300) (Default - Client) |
TLS1 | 192 (Hex C0) (Default - Client) |
SSL3 | 48 (Hex 30) |
SSL2 | 12 (Hex 0C) |
Note that only TLS 1.2 is enabled for server components that accept incoming connections. This adheres to industry standards to ensure a secure connection. Client components enable TLS 1.0, TLS 1.1, and TLS 1.2 by default and will negotiate the highest mutually supported version when connecting to a server, which should be TLS 1.2 in most cases.
SSLEnabledProtocols: Transport Layer Security (TLS) 1.3 Notes:
By default when TLS 1.3 is enabled, the component will use the internal TLS implementation when the SSLProvider is set to Automatic for all editions.
In editions that are designed to run on Windows, SSLProvider can be set to Platform to use the platform implementation instead of the internal implementation. When configured in this manner, please note that the platform provider is supported only on Windows 11/Windows Server 2022 and up. The default internal provider is available on all platforms and is not restricted to any specific OS version.
If set to 1 (Platform provider), please be aware of the following notes:
- The platform provider is available only on Windows 11/Windows Server 2022 and up.
- SSLEnabledCipherSuites and other similar SSL configuration settings are not supported.
- If SSLEnabledProtocols includes both TLS 1.3 and TLS 1.2, these restrictions are still applicable even if TLS 1.2 is negotiated. Enabling TLS 1.3 with the platform provider changes the implementation used for all TLS versions.
SSLEnabledProtocols: SSL2 and SSL3 Notes:
SSL 2.0 and 3.0 are not supported by the component when the SSLProvider is set to internal. To use SSL 2.0 or SSL 3.0, the platform security API must have the protocols enabled and SSLProvider needs to be set to platform.
This configuration setting is applicable only when SSLProvider is set to Internal.
If set to True, all certificates returned by the server will be present in the Encoded parameter of the SSLServerAuthentication event. This includes the leaf certificate, any intermediate certificate, and the root certificate.
When set, the component will save the session secrets in the same format as the SSLKEYLOGFILE environment variable functionality used by most major browsers and tools, such as Chrome, Firefox, and cURL. This file can then be used in tools such as Wireshark to decrypt TLS traffic for debugging purposes. When writing to this file, the component will only append, it will not overwrite previous values.
Note: This configuration setting is applicable only when SSLProvider is set to Internal.
Note: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:
server.Config("SSLNegotiatedCipher[connId]");
Note: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:
server.Config("SSLNegotiatedCipherStrength[connId]");
Note: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:
server.Config("SSLNegotiatedCipherSuite[connId]");
Note: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:
server.Config("SSLNegotiatedKeyExchange[connId]");
Note: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:
server.Config("SSLNegotiatedKeyExchangeStrength[connId]");
Note: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:
server.Config("SSLNegotiatedVersion[connId]");
0x00000001 | Ignore time validity status of certificate. |
0x00000002 | Ignore time validity status of CTL. |
0x00000004 | Ignore non-nested certificate times. |
0x00000010 | Allow unknown certificate authority. |
0x00000020 | Ignore wrong certificate usage. |
0x00000100 | Ignore unknown certificate revocation status. |
0x00000200 | Ignore unknown CTL signer revocation status. |
0x00000400 | Ignore unknown certificate authority revocation status. |
0x00000800 | Ignore unknown root revocation status. |
0x00008000 | Allow test root certificate. |
0x00004000 | Trust test root certificate. |
0x80000000 | Ignore non-matching CN (certificate CN non-matching server name). |
This functionality is currently not available when the provider is OpenSSL.
The value of this configuration setting is a newline-separated (CR/LF) list of certificates. For instance:
-----BEGIN CERTIFICATE----- MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw ... Intermediate Cert... eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w F0I1XhM+pKj7FjDr+XNj -----END CERTIFICATE----- \r \n -----BEGIN CERTIFICATE----- MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp ... Root Cert... d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA -----END CERTIFICATE-----
When specified the component will verify that the server certificate signature algorithm is among the values specified in this configuration setting. If the server certificate signature algorithm is unsupported, the component raises an exception.
The format of this value is a comma-separated list of hash-signature combinations. For instance:
component.SSLProvider = TCPClientSSLProviders.sslpInternal;
component.Config("SSLEnabledProtocols=3072"); //TLS 1.2
component.Config("TLS12SignatureAlgorithms=sha256-rsa,sha256-dsa,sha1-rsa,sha1-dsa");
The default value for this configuration setting is sha512-ecdsa,sha512-rsa,sha512-dsa,sha384-ecdsa,sha384-rsa,sha384-dsa,sha256-ecdsa,sha256-rsa,sha256-dsa,sha224-ecdsa,sha224-rsa,sha224-dsa,sha1-ecdsa,sha1-rsa,sha1-dsa.
To not restrict the server's certificate signature algorithm, specify an empty string as the value for this configuration setting, which will cause the signature_algorithms TLS 1.2 extension to not be sent.
The default value is ecdhe_secp256r1,ecdhe_secp384r1,ecdhe_secp521r1.
When using TLS 1.2 and SSLProvider is set to Internal, the values refer to the supported groups for ECC. The following values are supported:
- "ecdhe_secp256r1" (default)
- "ecdhe_secp384r1" (default)
- "ecdhe_secp521r1" (default)
The default value is set to balance common supported groups and the computational resources required to generate key shares. As a result, only some groups are included by default in this configuration setting.
Note: All supported groups can always be used during the handshake even if not listed here, but if a group is used that is not present in this list, it will incur an additional roundtrip and time to generate the key share for that group.
In most cases, this configuration setting does not need to be modified. This should be modified only if there is a specific reason to do so.
The default value is ecdhe_x25519,ecdhe_secp256r1,ecdhe_secp384r1,ffdhe_2048,ffdhe_3072
The values are ordered from most preferred to least preferred. The following values are supported:
- "ecdhe_x25519" (default)
- "ecdhe_x448"
- "ecdhe_secp256r1" (default)
- "ecdhe_secp384r1" (default)
- "ecdhe_secp521r1"
- "ffdhe_2048" (default)
- "ffdhe_3072" (default)
- "ffdhe_4096"
- "ffdhe_6144"
- "ffdhe_8192"
- "ed25519" (default)
- "ed448" (default)
- "ecdsa_secp256r1_sha256" (default)
- "ecdsa_secp384r1_sha384" (default)
- "ecdsa_secp521r1_sha512" (default)
- "rsa_pkcs1_sha256" (default)
- "rsa_pkcs1_sha384" (default)
- "rsa_pkcs1_sha512" (default)
- "rsa_pss_sha256" (default)
- "rsa_pss_sha384" (default)
- "rsa_pss_sha512" (default)
The default value is ecdhe_x25519,ecdhe_x448,ecdhe_secp256r1,ecdhe_secp384r1,ecdhe_secp521r1,ffdhe_2048,ffdhe_3072,ffdhe_4096,ffdhe_6144,ffdhe_8192
The values are ordered from most preferred to least preferred. The following values are supported:
- "ecdhe_x25519" (default)
- "ecdhe_x448" (default)
- "ecdhe_secp256r1" (default)
- "ecdhe_secp384r1" (default)
- "ecdhe_secp521r1" (default)
- "ffdhe_2048" (default)
- "ffdhe_3072" (default)
- "ffdhe_4096" (default)
- "ffdhe_6144" (default)
- "ffdhe_8192" (default)
Base Config Settings
The following is a list of valid code page identifiers:
Identifier | Name |
037 | IBM EBCDIC - U.S./Canada |
437 | OEM - United States |
500 | IBM EBCDIC - International |
708 | Arabic - ASMO 708 |
709 | Arabic - ASMO 449+, BCON V4 |
710 | Arabic - Transparent Arabic |
720 | Arabic - Transparent ASMO |
737 | OEM - Greek (formerly 437G) |
775 | OEM - Baltic |
850 | OEM - Multilingual Latin I |
852 | OEM - Latin II |
855 | OEM - Cyrillic (primarily Russian) |
857 | OEM - Turkish |
858 | OEM - Multilingual Latin I + Euro symbol |
860 | OEM - Portuguese |
861 | OEM - Icelandic |
862 | OEM - Hebrew |
863 | OEM - Canadian-French |
864 | OEM - Arabic |
865 | OEM - Nordic |
866 | OEM - Russian |
869 | OEM - Modern Greek |
870 | IBM EBCDIC - Multilingual/ROECE (Latin-2) |
874 | ANSI/OEM - Thai (same as 28605, ISO 8859-15) |
875 | IBM EBCDIC - Modern Greek |
932 | ANSI/OEM - Japanese, Shift-JIS |
936 | ANSI/OEM - Simplified Chinese (PRC, Singapore) |
949 | ANSI/OEM - Korean (Unified Hangul Code) |
950 | ANSI/OEM - Traditional Chinese (Taiwan; Hong Kong SAR, PRC) |
1026 | IBM EBCDIC - Turkish (Latin-5) |
1047 | IBM EBCDIC - Latin 1/Open System |
1140 | IBM EBCDIC - U.S./Canada (037 + Euro symbol) |
1141 | IBM EBCDIC - Germany (20273 + Euro symbol) |
1142 | IBM EBCDIC - Denmark/Norway (20277 + Euro symbol) |
1143 | IBM EBCDIC - Finland/Sweden (20278 + Euro symbol) |
1144 | IBM EBCDIC - Italy (20280 + Euro symbol) |
1145 | IBM EBCDIC - Latin America/Spain (20284 + Euro symbol) |
1146 | IBM EBCDIC - United Kingdom (20285 + Euro symbol) |
1147 | IBM EBCDIC - France (20297 + Euro symbol) |
1148 | IBM EBCDIC - International (500 + Euro symbol) |
1149 | IBM EBCDIC - Icelandic (20871 + Euro symbol) |
1200 | Unicode UCS-2 Little-Endian (BMP of ISO 10646) |
1201 | Unicode UCS-2 Big-Endian |
1250 | ANSI - Central European |
1251 | ANSI - Cyrillic |
1252 | ANSI - Latin I |
1253 | ANSI - Greek |
1254 | ANSI - Turkish |
1255 | ANSI - Hebrew |
1256 | ANSI - Arabic |
1257 | ANSI - Baltic |
1258 | ANSI/OEM - Vietnamese |
1361 | Korean (Johab) |
10000 | MAC - Roman |
10001 | MAC - Japanese |
10002 | MAC - Traditional Chinese (Big5) |
10003 | MAC - Korean |
10004 | MAC - Arabic |
10005 | MAC - Hebrew |
10006 | MAC - Greek I |
10007 | MAC - Cyrillic |
10008 | MAC - Simplified Chinese (GB 2312) |
10010 | MAC - Romania |
10017 | MAC - Ukraine |
10021 | MAC - Thai |
10029 | MAC - Latin II |
10079 | MAC - Icelandic |
10081 | MAC - Turkish |
10082 | MAC - Croatia |
12000 | Unicode UCS-4 Little-Endian |
12001 | Unicode UCS-4 Big-Endian |
20000 | CNS - Taiwan |
20001 | TCA - Taiwan |
20002 | Eten - Taiwan |
20003 | IBM5550 - Taiwan |
20004 | TeleText - Taiwan |
20005 | Wang - Taiwan |
20105 | IA5 IRV International Alphabet No. 5 (7-bit) |
20106 | IA5 German (7-bit) |
20107 | IA5 Swedish (7-bit) |
20108 | IA5 Norwegian (7-bit) |
20127 | US-ASCII (7-bit) |
20261 | T.61 |
20269 | ISO 6937 Non-Spacing Accent |
20273 | IBM EBCDIC - Germany |
20277 | IBM EBCDIC - Denmark/Norway |
20278 | IBM EBCDIC - Finland/Sweden |
20280 | IBM EBCDIC - Italy |
20284 | IBM EBCDIC - Latin America/Spain |
20285 | IBM EBCDIC - United Kingdom |
20290 | IBM EBCDIC - Japanese Katakana Extended |
20297 | IBM EBCDIC - France |
20420 | IBM EBCDIC - Arabic |
20423 | IBM EBCDIC - Greek |
20424 | IBM EBCDIC - Hebrew |
20833 | IBM EBCDIC - Korean Extended |
20838 | IBM EBCDIC - Thai |
20866 | Russian - KOI8-R |
20871 | IBM EBCDIC - Icelandic |
20880 | IBM EBCDIC - Cyrillic (Russian) |
20905 | IBM EBCDIC - Turkish |
20924 | IBM EBCDIC - Latin-1/Open System (1047 + Euro symbol) |
20932 | JIS X 0208-1990 & 0121-1990 |
20936 | Simplified Chinese (GB2312) |
21025 | IBM EBCDIC - Cyrillic (Serbian, Bulgarian) |
21027 | Extended Alpha Lowercase |
21866 | Ukrainian (KOI8-U) |
28591 | ISO 8859-1 Latin I |
28592 | ISO 8859-2 Central Europe |
28593 | ISO 8859-3 Latin 3 |
28594 | ISO 8859-4 Baltic |
28595 | ISO 8859-5 Cyrillic |
28596 | ISO 8859-6 Arabic |
28597 | ISO 8859-7 Greek |
28598 | ISO 8859-8 Hebrew |
28599 | ISO 8859-9 Latin 5 |
28605 | ISO 8859-15 Latin 9 |
29001 | Europa 3 |
38598 | ISO 8859-8 Hebrew |
50220 | ISO 2022 Japanese with no halfwidth Katakana |
50221 | ISO 2022 Japanese with halfwidth Katakana |
50222 | ISO 2022 Japanese JIS X 0201-1989 |
50225 | ISO 2022 Korean |
50227 | ISO 2022 Simplified Chinese |
50229 | ISO 2022 Traditional Chinese |
50930 | Japanese (Katakana) Extended |
50931 | US/Canada and Japanese |
50933 | Korean Extended and Korean |
50935 | Simplified Chinese Extended and Simplified Chinese |
50936 | Simplified Chinese |
50937 | US/Canada and Traditional Chinese |
50939 | Japanese (Latin) Extended and Japanese |
51932 | EUC - Japanese |
51936 | EUC - Simplified Chinese |
51949 | EUC - Korean |
51950 | EUC - Traditional Chinese |
52936 | HZ-GB2312 Simplified Chinese |
54936 | Windows XP: GB18030 Simplified Chinese (4 Byte) |
57002 | ISCII Devanagari |
57003 | ISCII Bengali |
57004 | ISCII Tamil |
57005 | ISCII Telugu |
57006 | ISCII Assamese |
57007 | ISCII Oriya |
57008 | ISCII Kannada |
57009 | ISCII Malayalam |
57010 | ISCII Gujarati |
57011 | ISCII Punjabi |
65000 | Unicode UTF-7 |
65001 | Unicode UTF-8 |
Identifier | Name |
1 | ASCII |
2 | NEXTSTEP |
3 | JapaneseEUC |
4 | UTF8 |
5 | ISOLatin1 |
6 | Symbol |
7 | NonLossyASCII |
8 | ShiftJIS |
9 | ISOLatin2 |
10 | Unicode |
11 | WindowsCP1251 |
12 | WindowsCP1252 |
13 | WindowsCP1253 |
14 | WindowsCP1254 |
15 | WindowsCP1250 |
21 | ISO2022JP |
30 | MacOSRoman |
10 | UTF16String |
0x90000100 | UTF16BigEndian |
0x94000100 | UTF16LittleEndian |
0x8c000100 | UTF32String |
0x98000100 | UTF32BigEndian |
0x9c000100 | UTF32LittleEndian |
65536 | Proprietary |
- Product: The product the license is for.
- Product Key: The key the license was generated from.
- License Source: Where the license was found (e.g., RuntimeLicense, License File).
- License Type: The type of license installed (e.g., Royalty Free, Single Server).
- Last Valid Build: The last valid build number for which the license will work.
This setting only works on these components: AS3Receiver, AS3Sender, Atom, Client(3DS), FTP, FTPServer, IMAP, OFTPClient, SSHClient, SCP, Server(3DS), Sexec, SFTP, SFTPServer, SSHServer, TCPClient, TCPServer.
Setting this configuration setting to True tells the component to use the internal implementation instead of using the system security libraries.
This setting is set to False by default on all platforms.
Trappable Errors (TCPServer Component)
TCPServer Errors
100 | You cannot change the RemotePort at this time. A connection is in progress. |
101 | You cannot change the RemoteHost at this time. A connection is in progress. |
102 | The RemoteHost address is invalid (0.0.0.0). |
104 | TCPServer is already listening. |
106 | Cannot change LocalPort when TCPServer is listening. |
107 | Cannot change LocalHost when TCPServer is listening. |
108 | Cannot change MaxConnections when TCPServer is listening. |
112 | You cannot change MaxLineLength at this time. A connection is in progress. |
116 | RemotePort cannot be zero. Please specify a valid service port number. |
126 | Invalid ConnectionId. |
135 | Operation would block. |
SSL Errors
270 | Cannot load specified security library. |
271 | Cannot open certificate store. |
272 | Cannot find specified certificate. |
273 | Cannot acquire security credentials. |
274 | Cannot find certificate chain. |
275 | Cannot verify certificate chain. |
276 | Error during handshake. |
280 | Error verifying certificate. |
281 | Could not find client certificate. |
282 | Could not find server certificate. |
283 | Error encrypting data. |
284 | Error decrypting data. |
TCP/IP Errors
10004 | [10004] Interrupted system call. |
10009 | [10009] Bad file number. |
10013 | [10013] Access denied. |
10014 | [10014] Bad address. |
10022 | [10022] Invalid argument. |
10024 | [10024] Too many open files. |
10035 | [10035] Operation would block. |
10036 | [10036] Operation now in progress. |
10037 | [10037] Operation already in progress. |
10038 | [10038] Socket operation on nonsocket. |
10039 | [10039] Destination address required. |
10040 | [10040] Message is too long. |
10041 | [10041] Protocol wrong type for socket. |
10042 | [10042] Bad protocol option. |
10043 | [10043] Protocol is not supported. |
10044 | [10044] Socket type is not supported. |
10045 | [10045] Operation is not supported on socket. |
10046 | [10046] Protocol family is not supported. |
10047 | [10047] Address family is not supported by protocol family. |
10048 | [10048] Address already in use. |
10049 | [10049] Cannot assign requested address. |
10050 | [10050] Network is down. |
10051 | [10051] Network is unreachable. |
10052 | [10052] Net dropped connection or reset. |
10053 | [10053] Software caused connection abort. |
10054 | [10054] Connection reset by peer. |
10055 | [10055] No buffer space available. |
10056 | [10056] Socket is already connected. |
10057 | [10057] Socket is not connected. |
10058 | [10058] Cannot send after socket shutdown. |
10059 | [10059] Too many references, cannot splice. |
10060 | [10060] Connection timed out. |
10061 | [10061] Connection refused. |
10062 | [10062] Too many levels of symbolic links. |
10063 | [10063] File name is too long. |
10064 | [10064] Host is down. |
10065 | [10065] No route to host. |
10066 | [10066] Directory is not empty |
10067 | [10067] Too many processes. |
10068 | [10068] Too many users. |
10069 | [10069] Disc Quota Exceeded. |
10070 | [10070] Stale NFS file handle. |
10071 | [10071] Too many levels of remote in path. |
10091 | [10091] Network subsystem is unavailable. |
10092 | [10092] WINSOCK DLL Version out of range. |
10093 | [10093] Winsock is not loaded yet. |
11001 | [11001] Host not found. |
11002 | [11002] Nonauthoritative 'Host not found' (try again or check DNS setup). |
11003 | [11003] Nonrecoverable errors: FORMERR, REFUSED, NOTIMP. |
11004 | [11004] Valid name, no data record (check DNS setup). |