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1
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2 package com.trilead.ssh2.channel;
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3
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4 import java.io.IOException;
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5 import java.net.InetSocketAddress;
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6 import java.net.ServerSocket;
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7 import java.net.Socket;
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8
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9 /**
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10 * LocalAcceptThread.
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11 *
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12 * @author Christian Plattner, plattner@trilead.com
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13 * @version $Id: LocalAcceptThread.java,v 1.1 2007/10/15 12:49:56 cplattne Exp $
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14 */
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15 public class LocalAcceptThread extends Thread implements IChannelWorkerThread {
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16 ChannelManager cm;
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17 String host_to_connect;
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18 int port_to_connect;
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19
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20 final ServerSocket ss;
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21
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22 public LocalAcceptThread(ChannelManager cm, int local_port, String host_to_connect, int port_to_connect)
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23 throws IOException {
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24 this.cm = cm;
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25 this.host_to_connect = host_to_connect;
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26 this.port_to_connect = port_to_connect;
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27 ss = new ServerSocket(local_port);
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28 }
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29
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30 public LocalAcceptThread(ChannelManager cm, InetSocketAddress localAddress, String host_to_connect,
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31 int port_to_connect) throws IOException {
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32 this.cm = cm;
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33 this.host_to_connect = host_to_connect;
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34 this.port_to_connect = port_to_connect;
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35 ss = new ServerSocket();
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36 ss.bind(localAddress);
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37 }
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38
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39 public void run() {
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40 try {
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41 cm.registerThread(this);
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42 }
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43 catch (IOException e) {
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44 stopWorking();
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45 return;
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46 }
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47
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48 while (true) {
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49 Socket s = null;
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50
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51 try {
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52 s = ss.accept();
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53 }
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54 catch (IOException e) {
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55 stopWorking();
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56 return;
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57 }
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58
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59 Channel cn = null;
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60 StreamForwarder r2l = null;
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61 StreamForwarder l2r = null;
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62
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63 try {
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64 /* This may fail, e.g., if the remote port is closed (in optimistic terms: not open yet) */
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65 cn = cm.openDirectTCPIPChannel(host_to_connect, port_to_connect, s.getInetAddress().getHostAddress(), s
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66 .getPort());
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67 }
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68 catch (IOException e) {
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69 /* Simply close the local socket and wait for the next incoming connection */
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70 try {
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71 s.close();
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72 }
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73 catch (IOException ignore) {
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74 }
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75
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76 continue;
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77 }
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78
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79 try {
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80 r2l = new StreamForwarder(cn, null, s, cn.stdoutStream, s.getOutputStream(), "RemoteToLocal");
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81 l2r = new StreamForwarder(cn, r2l, s, s.getInputStream(), cn.stdinStream, "LocalToRemote");
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82 }
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83 catch (IOException e) {
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84 try {
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85 /* This message is only visible during debugging, since we discard the channel immediatelly */
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86 cn.cm.closeChannel(cn, "Weird error during creation of StreamForwarder (" + e.getMessage() + ")",
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87 true);
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88 }
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89 catch (IOException ignore) {
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90 }
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91
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92 continue;
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93 }
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94
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95 r2l.setDaemon(true);
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96 l2r.setDaemon(true);
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97 r2l.start();
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98 l2r.start();
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99 }
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100 }
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101
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102 public void stopWorking() {
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103 try {
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104 /* This will lead to an IOException in the ss.accept() call */
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105 ss.close();
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106 }
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107 catch (IOException e) {
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108 }
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109 }
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110 }
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