Get the Type of an Active SSH Channel

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Demonstrates the Chilkat Ssh.GetChannelType method, which returns the type of the channel at a zero-based enumeration index. The only argument is the index — an enumeration position, not a channel number. Values include session, x11, forwarded-tcpip, and direct-tcpip.

Background: Paired with GetChannelNumber, this turns the channel collection into a readable inventory of what a connection is currently doing — which channels are running commands (session) versus tunneling TCP traffic (direct-tcpip). That is valuable for diagnostics and for application code that manages several channel kinds at once. An out-of-range index causes the string-returning method to report failure.

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bool success = false;

//  Demonstrates the Ssh.GetChannelType method, which returns the type of the channel at a
//  zero-based enumeration index.  The only argument is the index, which is an enumeration
//  position and not a channel number.  Values include "session" and "direct-tcpip".

Chilkat.Ssh ssh = new Chilkat.Ssh();

int sshPort = 22;
success = ssh.Connect("ssh.example.com",sshPort);
if (success == false) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

//  Normally you would not hard-code the password in source.  You should instead obtain it
//  from an interactive prompt, environment variable, or a secrets vault.
string password = "mySshPassword";

success = ssh.AuthenticatePw("mySshLogin",password);
if (success == false) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

int channelNum = ssh.OpenSessionChannel();
if (channelNum < 0) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

//  Enumerate the active channels and report each one's number and type.
int n = ssh.NumOpenChannels;
int i;
for (i = 0; i <= n - 1; i++) {
    int chNum = ssh.GetChannelNumber(i);
    string chType = ssh.GetChannelType(i);
    if (ssh.LastMethodSuccess == false) {
        Debug.WriteLine(ssh.LastErrorText);
        return;
    }

    Debug.WriteLine("Channel " + Convert.ToString(chNum) + " is of type " + chType);
}

ssh.Disconnect();