--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/ch/ethz/ssh2/channel/StreamForwarder.java	Thu Jul 31 16:33:38 2014 -0700
@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2006-2011 Christian Plattner. All rights reserved.
+ * Please refer to the LICENSE.txt for licensing details.
+ */
+package ch.ethz.ssh2.channel;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.Socket;
+
+/**
+ * A StreamForwarder forwards data between two given streams.
+ * If two StreamForwarder threads are used (one for each direction)
+ * then one can be configured to shutdown the underlying channel/socket
+ * if both threads have finished forwarding (EOF).
+ *
+ * @author Christian Plattner
+ * @version 2.50, 03/15/10
+ */
+public class StreamForwarder extends Thread {
+    OutputStream os;
+    InputStream is;
+    byte[] buffer = new byte[Channel.CHANNEL_BUFFER_SIZE];
+    Channel c;
+    StreamForwarder sibling;
+    Socket s;
+    String mode;
+
+    StreamForwarder(Channel c, StreamForwarder sibling, Socket s, InputStream is, OutputStream os, String mode)
+    throws IOException {
+        this.is = is;
+        this.os = os;
+        this.mode = mode;
+        this.c = c;
+        this.sibling = sibling;
+        this.s = s;
+    }
+
+    @Override
+    public void run() {
+        try {
+            while (true) {
+                int len = is.read(buffer);
+
+                if (len <= 0)
+                    break;
+
+                os.write(buffer, 0, len);
+                os.flush();
+            }
+        }
+        catch (IOException e) {
+            try {
+                c.cm.closeChannel(c, e, true);
+            }
+            catch (IOException ignored) {
+            }
+        }
+        finally {
+            try {
+                os.close();
+            }
+            catch (IOException ignored) {
+            }
+
+            try {
+                is.close();
+            }
+            catch (IOException ignored) {
+            }
+
+            if (sibling != null) {
+                while (sibling.isAlive()) {
+                    try {
+                        sibling.join();
+                    }
+                    catch (InterruptedException ignored) {
+                    }
+                }
+
+                try {
+                    c.cm.closeChannel(c, "StreamForwarder (" + mode + ") is cleaning up the connection", true);
+                }
+                catch (IOException ignored) {
+                }
+
+                try {
+                    if (s != null)
+                        s.close();
+                }
+                catch (IOException ignored) {
+                }
+            }
+        }
+    }
+}
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