/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.sshd.common.forward;
import java.io.IOException;
import java.net.InetSocketAddress;
import org.apache.sshd.client.channel.AbstractClientChannel;
import org.apache.sshd.client.future.DefaultOpenFuture;
import org.apache.sshd.client.future.OpenFuture;
import org.apache.sshd.common.Closeable;
import org.apache.sshd.common.SshConstants;
import org.apache.sshd.common.SshException;
import org.apache.sshd.common.SshdSocketAddress;
import org.apache.sshd.common.channel.ChannelOutputStream;
import org.apache.sshd.common.future.CloseFuture;
import org.apache.sshd.common.future.DefaultCloseFuture;
import org.apache.sshd.common.future.SshFutureListener;
import org.apache.sshd.common.io.IoSession;
import org.apache.sshd.common.util.Buffer;
import org.apache.sshd.common.util.CloseableUtils;
/**
* TODO Add javadoc
*
* @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a>
*/
public class TcpipClientChannel extends AbstractClientChannel {
public enum Type {
Direct,
Forwarded
}
private final Type typeEnum;
private final IoSession serverSession;
private final SshdSocketAddress remote;
public TcpipClientChannel(Type type, IoSession serverSession, SshdSocketAddress remote) {
super(type == Type.Direct ? "direct-tcpip" : "forwarded-tcpip");
this.typeEnum = type;
this.serverSession = serverSession;
this.remote = remote;
}
public OpenFuture getOpenFuture() {
return openFuture;
}
public synchronized OpenFuture open() throws IOException {
InetSocketAddress src = null, dst = null;
switch (typeEnum) {
case Direct:
src = (InetSocketAddress) serverSession.getRemoteAddress();
dst = this.remote.toInetSocketAddress();
break;
case Forwarded:
src = (InetSocketAddress) serverSession.getRemoteAddress();
dst = (InetSocketAddress) serverSession.getLocalAddress();
break;
}
if (closeFuture.isClosed()) {
throw new SshException("Session has been closed");
}
openFuture = new DefaultOpenFuture(lock);
log.info("Send SSH_MSG_CHANNEL_OPEN on channel {}", this);
Buffer buffer = session.createBuffer(SshConstants.SSH_MSG_CHANNEL_OPEN);
buffer.putString(type);
buffer.putInt(id);
buffer.putInt(localWindow.getSize());
buffer.putInt(localWindow.getPacketSize());
buffer.putString(dst.getAddress().getHostAddress());
buffer.putInt(dst.getPort());
buffer.putString(src.getAddress().getHostAddress());
buffer.putInt(src.getPort());
writePacket(buffer);
return openFuture;
}
@Override
protected synchronized void doOpen() throws IOException {
if (streaming == Streaming.Async) {
throw new IllegalArgumentException("Asynchronous streaming isn't supported yet on this channel");
}
invertedIn = out = new ChannelOutputStream(this, remoteWindow, log, SshConstants.SSH_MSG_CHANNEL_DATA);
}
@Override
protected Closeable getInnerCloseable() {
return CloseableUtils.sequential(serverSession, super.getInnerCloseable());
}
protected synchronized void doWriteData(byte[] data, int off, int len) throws IOException {
// Make sure we copy the data as the incoming buffer may be reused
Buffer buf = new Buffer(data, off, len);
buf = new Buffer(buf.getCompactData());
localWindow.consumeAndCheck(len);
serverSession.write(buf);
}
}