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IP*Works! V9
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Telnet Component

Properties   Methods   Events   Configuration Settings   Errors  

The Telnet Component is used to communicate with servers implementing the TELNET protocol.

Syntax

TipwTelnet

Remarks

The Telnet 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 Telnet Component adds a number of properties like Command, DoOption, etc. which allow sending of Telnet commands to the other end. The respective events (Command, Do, 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.

AcceptDataEnables or disables data reception (the DataIn event).
BytesSentThe number of bytes actually sent after an assignment to DataToSend .
CommandA single character Telnet command code to be sent to the server.
ConnectedTriggers a connection or disconnection.
DataToSendA string of data to be sent to the remote host.
DontOptionA single character Telnet option code to be sent to the server with the Telnet DONT command.
DoOptionA single character Telnet option code to be sent to the server with the Telnet DO command.
DoSubOptionA Telnet SubOption to send to the server with the SubOption command.
FirewallAutoDetectThis property tells the component whether or not to automatically detect and use firewall system settings, if available.
FirewallTypeThis property determines the type of firewall to connect through.
FirewallHostThis property contains the name or IP address of firewall (optional).
FirewallPasswordThis property contains a password if authentication is to be used when connecting through the firewall.
FirewallPortThis property contains the TCP port for the firewall Host .
FirewallUserThis property contains a user name if authentication is to be used connecting through a firewall.
KeepAliveWhen True, KEEPALIVE packets are enabled (for long connections).
LingerWhen set to True, connections are terminated gracefully.
LocalHostThe name of the local host or user-assigned IP interface through which connections are initiated or accepted.
LocalPortThe TCP port in the local host where IPPort binds.
RemoteHostThe address of the remote host. Domain names are resolved to IP addresses.
RemotePortThe Telnet port in the remote host (default is 23).
TimeoutA timeout for the component.
TransparentWhen True, Telnet command processing is disabled.
UrgentDataA string of data to be sent urgently (out-of-band) to the remote host.
WillOptionA single character Telnet option code to be sent to the server with the Telnet WILL command.
WontOptionA 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.

ConfigSets or retrieves a configuration setting .
ConnectConnect to a remote host.
DisconnectDisconnect from the remote host.
DoEventsProcesses events from the internal message queue.
SendSend 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.

CommandFired when a Telnet command comes from the Telnet server.
ConnectedFired immediately after a connection completes (or fails).
ConnectionStatusFired to indicate changes in connection state.
DataInFired when data is received from the remote host.
DisconnectedFired when a connection is closed.
DoFired when a Telnet DO OPTION command comes from the Telnet server.
DontFired when a Telnet DONT OPTION command comes from the Telnet server.
ErrorInformation about errors during data delivery.
ReadyToSendFired when the component is ready to send data.
SubOptionFired when a Telnet SubOption command comes from the Telnet server.
WillFired when a Telnet WILL OPTION command comes from the Telnet server.
WontFired 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.

ConnectionTimeoutSets a separate timeout value for establishing a connection.
FirewallAutoDetectTells the component whether or not to automatically detect and use firewall system settings, if available.
FirewallHostName or IP address of firewall (optional).
FirewallPasswordPassword to be used if authentication is to be used when connecting through the firewall.
FirewallPortThe TCP port for the FirewallHost;.
FirewallTypeDetermines the type of firewall to connect through.
FirewallUserA user name if authentication is to be used connecting through a firewall.
KeepAliveTimeThe inactivity time in milliseconds before a TCP keep-alive packet is sent.
KeepAliveIntervalThe retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received.
LingerWhen set to True, connections are terminated gracefully.
LingerTimeTime in seconds to have the connection linger.
LocalHostThe name of the local host through which connections are initiated or accepted.
LocalPortThe TCP port in the local host where the component binds.
MaxLineLengthThe maximum amount of data to accumulate when no EOL is found.
MaxTransferRateThe transfer rate limit in bytes per second.
RecordLengthThe length of received data records.
TCPKeepAliveDetermines whether or not the keep alive socket option is enabled.
UseIPv6Whether to use IPv6.
TcpNoDelayWhether or not to delay when sending packets.
AbsoluteTimeoutDetermines whether timeouts are inactivity timeouts or absolute timeouts.
FirewallDataUsed to send extra data to the firewall.
InBufferSizeThe size in bytes of the incoming queue of the socket.
OutBufferSizeThe size in bytes of the outgoing queue of the socket.
CodePageThe system code page used for Unicode to Multibyte translations.

 
 
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