1 /* 2 * Copyright (c) 2006-2011 Christian Plattner. All rights reserved. 3 * Please refer to the LICENSE.txt for licensing details. 4 */ 5 package ch.ethz.ssh2; 6 7 import java.io.IOException; 8 import java.io.InputStream; 9 import java.io.OutputStream; 10 import java.net.InetAddress; 11 12 import ch.ethz.ssh2.channel.Channel; 13 import ch.ethz.ssh2.channel.ChannelManager; 14 15 /** 16 * A <code>LocalStreamForwarder</code> forwards an Input- and Outputstream 17 * pair via the secure tunnel to another host (which may or may not be identical 18 * to the remote SSH-2 server). 19 * 20 * @author Christian Plattner 21 * @version 2.50, 03/15/10 22 */ 23 public class LocalStreamForwarder 24 { 25 private ChannelManager cm; 26 27 private Channel cn; 28 LocalStreamForwarder(ChannelManager cm, String host_to_connect, int port_to_connect)29 LocalStreamForwarder(ChannelManager cm, String host_to_connect, int port_to_connect) throws IOException 30 { 31 this.cm = cm; 32 cn = cm.openDirectTCPIPChannel(host_to_connect, port_to_connect, 33 InetAddress.getLocalHost().getHostAddress(), 0); 34 } 35 36 /** 37 * @return An <code>InputStream</code> object. 38 * @throws IOException 39 */ getInputStream()40 public InputStream getInputStream() throws IOException 41 { 42 return cn.getStdoutStream(); 43 } 44 45 /** 46 * Get the OutputStream. Please be aware that the implementation MAY use an 47 * internal buffer. To make sure that the buffered data is sent over the 48 * tunnel, you have to call the <code>flush</code> method of the 49 * <code>OutputStream</code>. To signal EOF, please use the 50 * <code>close</code> method of the <code>OutputStream</code>. 51 * 52 * @return An <code>OutputStream</code> object. 53 * @throws IOException 54 */ getOutputStream()55 public OutputStream getOutputStream() throws IOException 56 { 57 return cn.getStdinStream(); 58 } 59 60 /** 61 * Close the underlying SSH forwarding channel and free up resources. 62 * You can also use this method to force the shutdown of the underlying 63 * forwarding channel. Pending output (OutputStream not flushed) will NOT 64 * be sent. Pending input (InputStream) can still be read. If the shutdown 65 * operation is already in progress (initiated from either side), then this 66 * call is a no-op. 67 * 68 * @throws IOException 69 */ close()70 public void close() throws IOException 71 { 72 cm.closeChannel(cn, "Closed due to user request.", true); 73 } 74 } 75