minimalistic - C# Telnet Library




vb net telnet library (5)

Is there a good, free telnet library available for C# (not ASP .NET)? I have found a few on google, but they all have one issue or another (don't support login/password, don't support a scripted mode).

I am assuming that MS still has not included a telnet library as part of .NET v3.5 as I couldn't find it if it was. I would loooooove to be wrong though.

https://code.i-harness.com




Here is my code that is finally working

using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text.RegularExpressions;
using System.Threading;

class TelnetTest
{

    static void Main(string[] args)
    {
        TelnetTest tt = new TelnetTest();

    tt.tcpClient = new TcpClient("myserver", 23);
    tt.ns = tt.tcpClient.GetStream();

    tt.connectHost("admin", "admin");
    tt.sendCommand();

    tt.tcpClient.Close();
}

public void connectHost(string user, string passwd) {
    bool i = true;
    while (i)
    {
        Console.WriteLine("Connecting.....");
        Byte[] output = new Byte[1024];
        String responseoutput = String.Empty;
        Byte[] cmd = System.Text.Encoding.ASCII.GetBytes("\n");
        ns.Write(cmd, 0, cmd.Length);

        Thread.Sleep(1000);
        Int32 bytes = ns.Read(output, 0, output.Length);
        responseoutput = System.Text.Encoding.ASCII.GetString(output, 0, bytes);
        Console.WriteLine("Responseoutput: " + responseoutput);
        Regex objToMatch = new Regex("login:");
        if (objToMatch.IsMatch(responseoutput)) {
           cmd = System.Text.Encoding.ASCII.GetBytes(user + "\r");
           ns.Write(cmd, 0, cmd.Length);
        }

        Thread.Sleep(1000);
        bytes = ns.Read(output, 0, output.Length);
        responseoutput = System.Text.Encoding.ASCII.GetString(output, 0, bytes);
        Console.Write(responseoutput);
        objToMatch = new Regex("Password");
        if (objToMatch.IsMatch(responseoutput))
        {
            cmd = System.Text.Encoding.ASCII.GetBytes(passwd + "\r");
            ns.Write(cmd, 0, cmd.Length);
        }

        Thread.Sleep(1000);
        bytes = ns.Read(output, 0, output.Length);
        responseoutput = System.Text.Encoding.ASCII.GetString(output, 0, bytes);
        Console.Write("Responseoutput: " + responseoutput);

        objToMatch = new Regex("#");
        if (objToMatch.IsMatch(responseoutput))
        {
            i = false;
        }

    }

    Console.WriteLine("Just works");
}
}


I ended up finding MinimalistTelnet and adapted it to my uses. I ended up needing to be able to heavily modify the code due to the unique** device that I am attempting to attach to.

** Unique in this instance can be validly interpreted as brain-dead.





telnet