/*
 * ConnectBot: simple, powerful, open-source SSH client for Android
 * Copyright 2007 Kenny Root, Jeffrey Sharkey
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package ch.ethz.ssh2;

import java.io.IOException;
import java.net.InetSocketAddress;

import ch.ethz.ssh2.channel.ChannelManager;
import ch.ethz.ssh2.channel.DynamicAcceptThread;

/**
 * A <code>DynamicPortForwarder</code> forwards TCP/IP connections to a local
 * port via the secure tunnel to another host which is selected via the
 * SOCKS protocol. Checkout {@link Connection#createDynamicPortForwarder(int)}
 * on how to create one.
 *
 * @author Kenny Root
 * @version $Id: $
 */
public class DynamicPortForwarder {
    ChannelManager cm;

    DynamicAcceptThread dat;

    DynamicPortForwarder(ChannelManager cm, int local_port)
    throws IOException {
        this.cm = cm;
        dat = new DynamicAcceptThread(cm, local_port);
        dat.setDaemon(true);
        dat.start();
    }

    DynamicPortForwarder(ChannelManager cm, InetSocketAddress addr) throws IOException {
        this.cm = cm;
        dat = new DynamicAcceptThread(cm, addr);
        dat.setDaemon(true);
        dat.start();
    }

    /**
     * Stop TCP/IP forwarding of newly arriving connections.
     *
     * @throws IOException
     */
    public void close() throws IOException {
        dat.stopWorking();
    }
}