Ts3 telnet connection with C#

Question

I try to connect to my TeamSpeak 3 server using telnet in a C# application.

By the way, im not very experienced using telnet ^^', so I showed up the telnet Code at the Site https://msdn.microsoft.com/en-us/library/system.net.sockets.tcpclient(VS.80).aspx

The following code should:

connect to the teamspeak server
send the password and read out the welcome message

send the command "help" and read out the help Message

    string command = "help";

    // creates new TCP client
    TcpClient client = new TcpClient(adress, port);

    // get client stream
    NetworkStream stream = client.GetStream();

    // send Password
    Byte[] data = System.Text.Encoding.ASCII.GetBytes(password);
    stream.Write(data, 0, data.Length);
    data = new Byte[256];
    Thread.Sleep(200);

    Int32 bytes = stream.Read(data, 0, data.Length);
    String responseData = System.Text.Encoding.ASCII.GetString(data, 0, bytes);
    Console.WriteLine(responseData);


    // send the given command
    Byte[] data2 = System.Text.Encoding.ASCII.GetBytes(command);
    stream.Write(data2, 0, data2.Length);
    data2 = new Byte[2560];
    Thread.Sleep(200);

    Int32 bytes2 = stream.Read(data2, 0, data2.Length);
    String responseData2 = System.Text.Encoding.ASCII.GetString(data2, 0, bytes2);
    Console.WriteLine(responseData2);

    // end stream and client
    stream.Close();
    client.Close();

The first query works as it should and writes the welcome message into the Console. But at Int32 bytes2 = stream.Read(data2, 0, data2.Length); in the seccond query the application stops without giving back any exeption.

Can anyone explain why the I cant read out the Help Message?

If you're not adverse to using a library I've a NuGet package at https://www.nuget.org/packages/Telnet (code at https://github.com/9swampy/Telnet/) that would do all the telnet communications for you... — 9swampy, Dec 12 '15 at 09:37
Thanks for the offer, but I am always happy when I can implement all by myself. So that I know what I'm doing. ^^ — Gonios, Dec 12 '15 at 23:29
Yeah, I'm a bit like that too. Have a look at the code on Github then if you're still stuck. Good luck. — 9swampy, Dec 13 '15 at 10:49

score 0 · Accepted Answer · edited Dec 15 '15 at 22:30

The reason the application appears to stop is because NetworkStream.Read() will block if there is no data available to read and the connection is still open. Note that before calling stream.Read(data2, 0, data2.Length), we can see that the stream.DataAvailable property is set to false.

Now, as to why there is no data available: you need to terminate your commands with a line feed so that TeamSpeak knows that the command is complete:

string command = "help\n";

...

// send the given command
byte[] data2 = Encoding.ASCII.GetBytes(command);
stream.Write(data2, 0, data2.Length);

Your first query actually didn't succeed, for the same reason. The welcome message is sent by the server on connect; it is not a response to your command. Additionally, I can't see what the value of password is, but if you intend to log in the full command is login <username> <password>, like so:

TS3
Welcome to the TeamSpeak 3 ServerQuery interface, type "help" for a list of commands and "help <command>" for information on a specific command.
login serveradmin hunter2
error id=0 msg=ok

Ts3 telnet connection with C#

1 Answers1