Android™
Android™
Request SSH X11 Forwarding
See more SSH Examples
Demonstrates the Chilkat Ssh.SendReqX11Forwarding method, which sends an X11-forwarding request on a session channel. The arguments are the channel number, whether forwarding is limited to a single connection, and the X11 authentication protocol, cookie, and screen number.
Background: X11 forwarding lets a graphical program running on the remote host display its window on your local machine, tunneled over SSH. This is a low-level method that only sends the protocol request — your application is still responsible for the local X server side of the arrangement. The authentication cookie guards the forwarded display, so it should be a freshly generated value rather than a fixed constant.
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// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;
import android.app.Activity;
import com.chilkatsoft.*;
import android.widget.TextView;
import android.os.Bundle;
public class SimpleActivity extends Activity {
private static final String TAG = "Chilkat";
// Called when the activity is first created.
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
boolean success = false;
// Demonstrates the Ssh.SendReqX11Forwarding method, which sends an SSH X11-forwarding request
// on a session channel. The 1st argument is the channel number, the 2nd limits forwarding to a
// single connection, and the 3rd through 5th supply the X11 authentication protocol, cookie,
// and screen number.
CkSsh ssh = new CkSsh();
int sshPort = 22;
success = ssh.Connect("ssh.example.com",sshPort);
if (success == false) {
Log.i(TAG, 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) {
Log.i(TAG, ssh.lastErrorText());
return;
}
// Open a session channel. A negative return value indicates failure.
int channelNum = ssh.OpenSessionChannel();
if (channelNum < 0) {
Log.i(TAG, ssh.lastErrorText());
return;
}
// Request X11 forwarding. Named variables make each argument's meaning clear.
boolean singleConnection = false;
String authProt = "MIT-MAGIC-COOKIE-1";
String authCookie = "d92f5e1a7c8b4306af17c2e5b9d43081";
int screenNum = 0;
success = ssh.SendReqX11Forwarding(channelNum,singleConnection,authProt,authCookie,screenNum);
if (success == false) {
Log.i(TAG, ssh.lastErrorText());
return;
}
Log.i(TAG, "X11 forwarding requested.");
ssh.Disconnect();
}
static {
System.loadLibrary("chilkat");
// Note: If the incorrect library name is passed to System.loadLibrary,
// then you will see the following error message at application startup:
//"The application <your-application-name> has stopped unexpectedly. Please try again."
}
}