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1
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2 package com.trilead.ssh2;
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3
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4 import java.io.IOException;
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5 import java.io.InputStream;
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6 import java.io.OutputStream;
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7
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8 import com.trilead.ssh2.channel.Channel;
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9 import com.trilead.ssh2.channel.ChannelManager;
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10 import com.trilead.ssh2.channel.LocalAcceptThread;
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11
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12
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13 /**
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14 * A <code>LocalStreamForwarder</code> forwards an Input- and Outputstream
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15 * pair via the secure tunnel to another host (which may or may not be identical
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16 * to the remote SSH-2 server).
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17 *
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18 * @author Christian Plattner, plattner@trilead.com
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19 * @version $Id: LocalStreamForwarder.java,v 1.1 2007/10/15 12:49:56 cplattne Exp $
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20 */
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21 public class LocalStreamForwarder {
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22 ChannelManager cm;
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23
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24 String host_to_connect;
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25 int port_to_connect;
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26 LocalAcceptThread lat;
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27
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28 Channel cn;
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29
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30 LocalStreamForwarder(ChannelManager cm, String host_to_connect, int port_to_connect) throws IOException {
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31 this.cm = cm;
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32 this.host_to_connect = host_to_connect;
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33 this.port_to_connect = port_to_connect;
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34 cn = cm.openDirectTCPIPChannel(host_to_connect, port_to_connect, "127.0.0.1", 0);
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35 }
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36
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37 /**
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38 * @return An <code>InputStream</code> object.
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39 * @throws IOException
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40 */
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41 public InputStream getInputStream() throws IOException {
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42 return cn.getStdoutStream();
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43 }
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44
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45 /**
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46 * Get the OutputStream. Please be aware that the implementation MAY use an
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47 * internal buffer. To make sure that the buffered data is sent over the
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48 * tunnel, you have to call the <code>flush</code> method of the
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49 * <code>OutputStream</code>. To signal EOF, please use the
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50 * <code>close</code> method of the <code>OutputStream</code>.
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51 *
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52 * @return An <code>OutputStream</code> object.
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53 * @throws IOException
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54 */
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55 public OutputStream getOutputStream() throws IOException {
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56 return cn.getStdinStream();
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57 }
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58
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59 /**
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60 * Close the underlying SSH forwarding channel and free up resources.
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61 * You can also use this method to force the shutdown of the underlying
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62 * forwarding channel. Pending output (OutputStream not flushed) will NOT
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63 * be sent. Pending input (InputStream) can still be read. If the shutdown
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64 * operation is already in progress (initiated from either side), then this
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65 * call is a no-op.
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66 *
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67 * @throws IOException
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68 */
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69 public void close() throws IOException {
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70 cm.closeChannel(cn, "Closed due to user request.", true);
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71 }
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72 }
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