IP*Works! SSL telnets Component : telnets OCX, telnets .NET Component, telnets Class, telnets Bean, telnets Object

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Available in: SSH | SSL

TelnetS Component [IP*Works! SSL V8]

Properties Methods Events Configuration Settings

The TelnetS component is used to communicate with servers implementing the TELNET protocol.

NOTE: What follows is a very short description of the component interfaces. For more information, please consult the help files that come with the respective package.

Remarks

The TelnetS component is the SSL-enabled equivalent of the IP*Works! Telnet component. The main difference is the introduction of a set of new configuration settings, properties and events that deal with SSL security. The SSLProvider configuration setting chooses a security provider subsystem. The SSLEnabledProtocols and SSLCipherStrength configuration settings determine which protocols are enabled and at what security level. The property is used to select a client certificate if the server is requesting client authentication. The SSLSecurityFlags configuration setting, together with the event allow you to check the server identity and other security attributes. Finally, the event provides information about the SSL handshake.

The TelnetS component provides a simple interface to Telnet communications as specified by RFC 854. It allows sending of Telnet command codes to remote Telnet servers and it scans the input data for Telnet commands. Appropriate events are fired for received commands.

The connection interface is very similar to that of IPPort. The same properties and events are used for sending and receiving normal data, and the same property set is used for setting properties of the connection. The TelnetS component adds a number of properties like , , etc. which allow sending of Telnet commands to the other end. The respective events (, , etc.) are fired when the corresponding Telnet commands are received.

Property List

The following is the full list of the properties of the component with short descriptions. Click on the links for further details.


AcceptData	Enables or disables data reception (the DataIn event).
BytesSent	The number of bytes actually sent after an assignment to DataToSend .
Command	A single character Telnet command code to be sent to the server.
Connected	Triggers a connection or disconnection.
DataToSend	A string of data to be sent to the remote host.
DontOption	A single character Telnet option code to be sent to the server with the Telnet DONT command.
DoOption	A single character Telnet option code to be sent to the server with the Telnet DO command.
DoSubOption	A Telnet suboption to send to the server with the suboption command.
Firewall	A set of properties related to firewall access.
KeepAlive	When True, KEEPALIVE packets are enabled (for long connections).
Linger	When set to True, connections are terminated gracefully.
LocalHost	The name of the local host or user-assigned IP interface through which connections are initiated or accepted.
LocalPort	The TCP port in the local host where IPPort binds.
RemoteHost	The address of the remote host. Domain names are resolved to IP addresses.
RemotePort	The secure Telnet port in the remote host (default is 992).
SSLAcceptServerCert	Instructs the component to unconditionally accept the server certificate that matches the supplied certificate.
SSLCert	The certificate to be used during ssl negotiation.
SSLServerCert	The server certificate for the last established connection.
SSLStartMode	Determines how the component starts the SSL negotiation.
Timeout	A timeout for the component.
Transparent	When True, Telnet command processing is disabled.
UrgentData	A string of data to be sent urgently (out-of-band) to the remote host.
WillOption	A single character Telnet option code to be sent to the server with the Telnet WILL command.
WontOption	A single character Telnet option code to be sent to the server with the Telnet WONT command.

Method List

The following is the full list of the methods of the component with short descriptions. Click on the links for further details.


Config	Sets or retrieves a configuration setting.
Connect	Connect to a remote host.
Disconnect	Disconnect from the remote host.
DoEvents	Processes events from the internal message queue.
Send	Send data to the remote host.

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.


Command	Fired when a Telnet command comes from the Telnet server.
Connected	Fired immediately after a connection completes (or fails).
ConnectionStatus	Fired to indicate changes in connection state.
DataIn	Fired when data is received from the remote host.
Disconnected	Fired when a connection is closed.
Do	Fired when a Telnet DO OPTION command comes from the Telnet server.
Dont	Fired when a Telnet DONT OPTION command comes from the Telnet server.
Error	Information about errors during data delivery.
ReadyToSend	Fired when the component is ready to send data.
SSLServerAuthentication	Fired after the server presents its certificate to the client.
SSLStatus	Shows the progress of the secure connection.
SubOption	Fired when a Telnet suboption command comes from the Telnet server.
Will	Fired when a Telnet WILL OPTION command comes from the Telnet server.
Wont	Fired when a Telnet WONT OPTION command comes from the Telnet server.

Configuration Settings

The following is a list of configuration settings for the component with short descriptions. Click on the links for further details.


MaxLineLength	The maximum amount of data to accumulate when no EOL is found.
FirewallListener	If true, the component binds to a SOCKS firewall as a server (IPPort only).
CloseStreamAfterTransfer	If true, the component will close the upload or download stream after the transfer.
TcpNoDelay	Whether or not to delay when sending packets
AcceptAnyServerCert	If set the component will accept any certificate presented by the server
SSLProvider	The name of the security provider to use.
SSLCipherStrength	The minimum cipher strength used for bulk encryption.
SSLEnabledProtocols	Used to enable/disable the supported security protocols.
SSLSecurityFlags	Flags that control certificate verification
ReuseSSLSession	Determines if the SSL session is reused.
OpenSSLCipherList	A string that controls the ciphers to be used by SSL.
OpenSSLPrngSeedData	The data to seed the pseudo random number generator(PRNG).
OpenSSLCAFile	Name of the file containing the list of CA's trusted by your application.
OpenSSLCADir	The path to a directory containing CA certificates.
InBufferSize	The size in bytes of the incoming queue of the socket.
OutBufferSize	The size in bytes of the outgoing queue of the socket.
AbsoluteTimeout	Determines whether timeouts are inactivity timeouts or absolute timeouts.
FirewallData	Used to send extra data to the firewall.
CodePage	The system code page used for Unicode to Multibyte translations (Windows/COM only).

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