This example demonstrates how forwarding X11 connections from a remote host can be accomplished.
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import net.schmizz.sshj.SSHClient; import net.schmizz.sshj.common.StreamCopier; import net.schmizz.sshj.connection.channel.direct.Session; import net.schmizz.sshj.connection.channel.direct.Session.Command; import net.schmizz.sshj.connection.channel.forwarded.SocketForwardingConnectListener; import java.io.IOException; import java.net.InetSocketAddress; public class X11 { public static void main(String... args) throws IOException, InterruptedException { final SSHClient ssh = new SSHClient(); // Compression makes X11 more feasible over slower connections // ssh.useCompression(); ssh.loadKnownHosts(); // NOTE: Forwarding incoming X connections to localhost:6000 only works if X is started without the // "-nolisten tcp" option (this is usually not the default for good reason) ssh.registerX11Forwarder(new SocketForwardingConnectListener(new InetSocketAddress("localhost", 6000))); ssh.connect("localhost"); try { ssh.authPublickey(System.getProperty("user.name")); Session sess = ssh.startSession(); // It is recommendable to send a fake cookie, and in your ConnectListener when a connection comes in replace // it with the real one. But here simply one from `xauth list` is being used. sess.reqX11Forwarding("MIT-MAGIC-COOKIE-1", "b0956167c9ad8f34c8a2788878307dc9", 0); final Command cmd = sess.exec("/usr/X11/bin/xcalc"); new StreamCopier(cmd.getInputStream(), System.out).spawn("stdout"); new StreamCopier(cmd.getErrorStream(), System.err).spawn("stderr"); // Wait for session & X11 channel to get closed ssh.getConnection().join(); } finally { ssh.disconnect(); } } } |
