Telnetting a server using node.js

[Bugzu G]

Hi Guyz,


I am new to nodejs. I am using this script for telnetting a server and
i am able to connect and receive response from server.

var net = require('net');
var conn = net.createConnection(port,host);

Is it write way to do?
if yes then how can i pass username and password so that i am able to
login without user interaction?



Thanks in advance.

Bugzu

[Bugzu G]

[Bugzu G]

Anyone, please help me with this. Any help would be highly appreciated.

Thanks,
bugzu

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[Matt]

Authentication depends entirely on the protocol in question.

[Isaac Schlueter]

What's the server?

So far, yes, that is the right way to create a connection. Here's the rest:

var conn = net.createConnection(port,host);
conn.on("connection", function (socket) {
socket.on("data", function (c) {
// data coming in. deal with it
socket.write("hello")
socket.end("send one last optional buffer and close the connection")
})
socket.on("end", function () {
// ITS OVER!
})
})

[Andrew Stone]

I don't believe telnet has an option to do this. If you can use ssh. Telnet should have died years ago, although it is useful for things like getting a repl on localhost.

You can try the following though. 

echo {password} | telnet -l {username}  host.com

This is not a node issue and is strictly related to telnet.

-Andrew

[Marco Rogers]

@Bugzu Since you say you're new to node, I'll add a little info that might be helpful.  The net socket that you are creating is just a "dumb" socket.  Node doesn't give you any help in figuring out how to talk over that socket.  You can use it like a telnet connection.  But you'll have to parse the data coming from the other end and respond accordingly.  For example, expanding Isaac's example.

var conn = net.createConnection(port,host);

conn.on("connection", function (socket) {
  socket.on("data", function (c) {

    var data = c + ''; // make sure it's a string

    switch (data) {

      case 'login: ': // prompting you for a login

         socket.write('username');  // send username

         break;

      case 'password: ': // prompting you for password

          socket.write('supersekrit');  // send password

          break;

      case 'Invalid Username!':

          // handle this

          break;

      default:

          // do something else

          break;

    }
  })
  socket.on("end", function () {
    // ITS OVER!
  })
})

You can get data and write data to the socket as long as it's open. And you have to manage that communication yourself.  The important thing to note here is that data coming off the socket is in chunks. It's not necessarily going to be line by line, and almost certainly won't be suitable for a simple switch/case statement like this.  This is just to illustrate the idea.

Hope this helps.

:Marco

[Bugzu G]

Thanks all for replying.

what i am doing is below creating a conn. with freechess.org

var port = 5000, host = "freechess.org";

var net = require('net');

var fics = net.createConnection(port,host);

    fics.addListener('connect',function(){
        var input = process.openStdin(),
            output = process.stdout;

        sys.puts('Connected to FICS');

        fics.addListener('data',function(chunk){
            //here client is browser...i am doing this using socket.io
            client.send(chunk.toString('utf8',0,chunk.length));
        })
    });


what i want to do is send username and password to freechess.org without user interaction.


Thanks,
bugzu

[Bugzu G]

As Marcos pointed socket.write...but it didnt work.
Is there any other way to accomplish this.

Thanks All,
bugzu

[Jann Horn]

Am Freitag, den 25.03.2011, 18:00 +0530 schrieb Bugzu G:
> fics.addListener('connect',function(){
> var input = process.openStdin(),
> output = process.stdout;
>
> sys.puts('Connected to FICS');
>
> fics.addListener('data',function(chunk){
> //here client is browser...i am doing this using socket.io
> client.send(chunk.toString('utf8',0,chunk.length));
> })
> });
> what i want to do is send username and password to freechess.org without
> user interaction.

Try to write to "fics" when the "connect" event fires, maybe it will
work. If it doesn't, you probably have to look through the incoming
chunks until you get a login prompt, send your username, wait for the
password prompt and send the password.

Jann