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annotate src/ch/ethz/ssh2/LocalStreamForwarder.java @ 292:855cdc3b2ced ganymed

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start conversion from trilead to ganymed
author Carl Byington <carl@five-ten-sg.com>
date Fri, 18 Jul 2014 20:36:45 -0700
parents 91a31873c42a
children 071eccdff8ea
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1 /*
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2 * Copyright (c) 2006-2011 Christian Plattner. All rights reserved.
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3 * Please refer to the LICENSE.txt for licensing details.
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4 */
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5 package ch.ethz.ssh2;
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6
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7 import java.io.IOException;
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8 import java.io.InputStream;
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9 import java.io.OutputStream;
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10 import java.net.InetAddress;
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11
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12 import ch.ethz.ssh2.channel.Channel;
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13 import ch.ethz.ssh2.channel.ChannelManager;
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14
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15 /**
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16 * A <code>LocalStreamForwarder</code> forwards an Input- and Outputstream
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17 * pair via the secure tunnel to another host (which may or may not be identical
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18 * to the remote SSH-2 server).
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19 *
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20 * @author Christian Plattner
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21 * @version 2.50, 03/15/10
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22 */
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23 public class LocalStreamForwarder
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24 {
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25 private ChannelManager cm;
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26
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27 private Channel cn;
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28
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29 LocalStreamForwarder(ChannelManager cm, String host_to_connect, int port_to_connect) throws IOException
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30 {
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31 this.cm = cm;
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32 cn = cm.openDirectTCPIPChannel(host_to_connect, port_to_connect,
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33 InetAddress.getLocalHost().getHostAddress(), 0);
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34 }
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35
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36 /**
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37 * @return An <code>InputStream</code> object.
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38 * @throws IOException
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39 */
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40 public InputStream getInputStream() throws IOException
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41 {
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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 {
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57 return cn.getStdinStream();
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58 }
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59
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60 /**
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61 * Close the underlying SSH forwarding channel and free up resources.
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62 * You can also use this method to force the shutdown of the underlying
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63 * forwarding channel. Pending output (OutputStream not flushed) will NOT
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64 * be sent. Pending input (InputStream) can still be read. If the shutdown
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65 * operation is already in progress (initiated from either side), then this
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66 * call is a no-op.
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67 *
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68 * @throws IOException
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69 */
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70 public void close() throws IOException
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71 {
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72 cm.closeChannel(cn, "Closed due to user request.", true);
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73 }
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74 }