/*
* Copyright 2010-2012 sshj contributors
*
* 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 net.schmizz.sshj.connection.channel.forwarded;
import net.schmizz.concurrent.Event;
import net.schmizz.sshj.common.StreamCopier;
import net.schmizz.sshj.connection.channel.Channel;
import net.schmizz.sshj.connection.channel.SocketStreamCopyMonitor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.net.Socket;
import java.net.SocketAddress;
import java.util.concurrent.TimeUnit;
/** A {@link ConnectListener} that forwards what is received over the channel to a socket and vice-versa. */
public class SocketForwardingConnectListener
implements ConnectListener {
protected final Logger log = LoggerFactory.getLogger(getClass());
protected final SocketAddress addr;
/** Create with a {@link SocketAddress} this listener will forward to. */
public SocketForwardingConnectListener(SocketAddress addr) {
this.addr = addr;
}
/** On connect, confirm the channel and start forwarding. */
@Override
public void gotConnect(Channel.Forwarded chan)
throws IOException {
log.debug("New connection from {}:{}", chan.getOriginatorIP(), chan.getOriginatorPort());
final Socket sock = new Socket();
sock.setSendBufferSize(chan.getLocalMaxPacketSize());
sock.setReceiveBufferSize(chan.getRemoteMaxPacketSize());
sock.connect(addr);
// ok so far -- could connect, let's confirm the channel
chan.confirm();
final Event<IOException> soc2chan = new StreamCopier(sock.getInputStream(), chan.getOutputStream())
.bufSize(chan.getRemoteMaxPacketSize())
.spawnDaemon("soc2chan");
final Event<IOException> chan2soc = new StreamCopier(chan.getInputStream(), sock.getOutputStream())
.bufSize(chan.getLocalMaxPacketSize())
.spawnDaemon("chan2soc");
SocketStreamCopyMonitor.monitor(5, TimeUnit.SECONDS, chan2soc, soc2chan, chan, sock);
}
}