Class telnet

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Container
                   |
                   +----java.awt.Panel
                           |
                           +----java.applet.Applet
                                   |
                                   +----telnet

public class telnet

extends Applet

implements Runnable, TerminalHost, StatusPeer

Version:

$Id: telnet.java,v 1.19 1998/02/09 10:22:15 leo Exp $

Author:

Matthias L. Jugel, Marcus Meißner

address

The host address to connect to.

emulation

Emulation type (default is vt320).

modules

Dynamically loaded modules are stored here.

params

This Hashtable contains information retrievable by getParameter() in case the program is run as an application and the AppletStub is missing.

port

The port number (default ist 23).

proxy

The proxy ip address.

proxyport

The proxy port number.

term

The terminal emulation (dynamically loaded).

tio

The telnet io methods.

telnet()

connect()

Connect to the specified host and port but don't break existing connections.

connect(String)

Connect to the specified host and port but don't break existing connections.

connect(String, int)

Connect to the specified host and port but don't break existing connections.

disconnect()

Disconnect from the remote host.

getAppletInfo()

Retrieve the current version of the applet.

getParameter(String)

We override the Applet method getParameter() to be able to handle parameters even as application.

getParameterInfo()

Retrieve parameter tag information.

init()

Initialize applet.

main(String[])

The main function is called on startup of the application.

notifyStatus(Vector)

This method is called when telnet needs to be notified of status changes.

run()

Try to read data from the sockets and put it on the terminal.

send(String)

Send a String to the remote host.

start()

Upon start of the applet try to create a new connection.

stop()

Disconnect when the applet is stopped.

writeToSocket(String)

Send a String to the remote Host.

writeToUser(String)

Send a String to the users terminal

  protected TelnetIO tio

The telnet io methods.

See Also:

TelnetIO

  protected Terminal term

The terminal emulation (dynamically loaded).

See Also:

emulation, Terminal, TerminalHost

  protected String address

The host address to connect to. This is retrieved from the PARAM tag "address".

  protected int port

The port number (default ist 23). This can be specified as the PARAM tag "port".

  protected String proxy

The proxy ip address. If this variable is set telnet will try to connect to this address and then send a string to tell the relay where the target host is.

See Also:

address

  protected int proxyport

The proxy port number. This is the port where the relay is expected to listen for incoming connections.

See Also:

proxy, port

  protected String emulation

Emulation type (default is vt320). This can be specified as the PARAM tag "emulation".

See Also:

term, Terminal, TerminalHost

  protected Vector modules

Dynamically loaded modules are stored here.

  public Hashtable params

This Hashtable contains information retrievable by getParameter() in case the program is run as an application and the AppletStub is missing.

  public telnet()

  public String getAppletInfo()

Retrieve the current version of the applet.

Returns:

String a string with the version information.

Overrides:

getAppletInfo in class Applet

  public String[][] getParameterInfo()

Retrieve parameter tag information. This includes the tag information from terminal and loaded modules.

Returns:

String an array of array of string with tag information

Overrides:

getParameterInfo in class Applet

See Also:

getParameterInfo

  public String getParameter(String name)

We override the Applet method getParameter() to be able to handle parameters even as application.

Parameters:

name - The name of the queried parameter.

Returns:

the value of the parameter

Overrides:

getParameter in class Applet

See Also:

getParameter

  public static void main(String args[])

The main function is called on startup of the application.

  public void init()

Initialize applet. This method reads the PARAM tags "address", "port" and "emulation". The emulation class is loaded dynamically. It also loads modules given as parameter "module#".

Overrides:

init in class Applet

  public void start()

Upon start of the applet try to create a new connection.

Overrides:

start in class Applet

  public final void stop()

Disconnect when the applet is stopped.

Overrides:

stop in class Applet

  public void run()

Try to read data from the sockets and put it on the terminal. This is done until the thread dies or an error occurs.

  public boolean connect()

Connect to the specified host and port but don't break existing connections. Connects to the host and port specified in the tags.

Returns:

false if connection was unsuccessful

  public boolean connect(String host)

Connect to the specified host and port but don't break existing connections. Uses the port specified in the tags or 23.

Parameters:

host - destination host address

  public boolean connect(String host,
                         int prt)

Connect to the specified host and port but don't break existing connections.

Parameters:

host - destination host address

prt - destination hosts port

  public boolean disconnect()

Disconnect from the remote host.

Returns:

false if there was a problem disconnecting.

  public boolean send(String str)

Send a String to the remote host. Implements display.TerminalHost

Parameters:

s - String to be sent

Returns:

true if we are connected

See Also:

TerminalHost

  public boolean writeToSocket(String str)

Send a String to the remote Host.

Parameters:

str - String to be sent

Returns:

true if we are connected

See Also:

BSXModule

  public void writeToUser(String str)

Send a String to the users terminal

Parameters:

str - String to be displayed

Returns:

void

See Also:

BSXModule

  public Object notifyStatus(Vector status)

This method is called when telnet needs to be notified of status changes.

Parameters:

status - Vector of status information.

Returns:

an object of the information requested.

See Also:

StatusPeer