Using the Rlogin class

The Rlogin class allows you to connect to a remote host as you would with a Telnet session. Unlike telnet, however, Rlogin does not support option negotiation and therefore is simpler to use. To establish an Rlogin session with a remote host you first instantiate Rlogin, assign event handlers, and pass the desired remote host hostname and username to the Connect method.

Example

This example demonstrates an interactive session using the Rlogin class.

[C#]

using Jscape.Telnet;

namespace RloginTest {

       class RloginExample {

               public RloginExample() {

                       // Instantiate Rlogin

                       Rlogin rlogin = new Rlogin();

                       // Assign delegate methods to capture events

                       rlogin.ConnectedEvent += new Rlogin.RloginConnectedEventHandler(OnConnected);

                       rlogin.DataReceivedEvent += new Rlogin.RloginDataReceivedEventHandler(OnDataReceived);

                       // Connect to Remote Host

                       rlogin.Connect("remotehost.com", "username");

                       string line = null;

                       while((line = Console.ReadLine()) != null) {

                               rlogin.Send(line + "\r\n");

                       }

                       // Disconnect from Remote Host

                       rlogin.Disconnect();

               }

               public void OnDataReceived(object sender, RloginDataReceivedEventArgs e) {

                       byte[] buffer = e.Data;

                       string data = rlogin.Encoding.GetString(buffer);

                       Console.Write(data);

               }

               public void OnConnected(object sender, RloginConnectedEventArgs e) {

                       Console.WriteLine("Connected.");

               }

               /// The main entry point for the application.

               [STAThread]

               static void Main(string[] args) {

                       RloginExample example = new RloginExample();

               }

       }

}

[Visual Basic]

Imports System

Imports Jscape.Telnet

Public Class RloginExample

   Public WithEvents myRlogin As Rlogin

   Dim connect As Boolean = False

   Public Sub New(ByVal hostname As String)

       ' Instantiate Rlogin

       myRlogin = New Rlogin

       ' Connect to remote host

       myRlogin.Connect(hostname, "sconcepts")

       ' Begin reading and writing data to remote host

       Dim dataIn As String = ""

       Do

           dataIn = Console.ReadLine()

           If (dataIn <> "exit") Then

               myRlogin.Send(dataIn & vbCr)

           Else

               Me.Connected = False

           End If

       Loop While Me.Connected = True

       ' Disconnect from remote host

       myRlogin.Disconnect()

   End Sub

   Property Connected() As Boolean

       Get

           Return connect

       End Get

       Set(ByVal Value As Boolean)

           connect = Value

       End Set

   End Property

   Public Shared Sub Main()

       Dim hostname As String

       Dim example As RloginExample

       Console.Write("Remote Host: ")

       hostname = Console.ReadLine()

       If (hostname <> "") Then

           example = New RloginExample(hostname)

       End If

   End Sub

   Public Sub OnConnected(ByVal sender As Object, ByVal e As RloginConnectedEventArgs) Handles myRlogin.ConnectedEvent

       Me.Connected = True

       Console.WriteLine("Connected to {0}", e.Hostname)

   End Sub

   Private Sub OnDisconnected(ByVal sender As Object, ByVal e As RloginDisconnectedEventArgs) Handles myRlogin.DisconnectedEvent

       Console.WriteLine("Disconnected.")

       Me.Connected = False

   End Sub

   Private Sub OnDataReceived(ByVal sender As Object, ByVal e As RloginDataReceivedEventArgs) Handles myRlogin.DataReceivedEvent

       Console.Write(myRlogin.Encoding.GetString(e.Data))

   End Sub

End Class