/*
* 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.client.channel;
import java.io.IOException;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.net.InetAddress;
import java.net.UnknownHostException;
import org.apache.sshd.client.future.DefaultOpenFuture;
import org.apache.sshd.client.future.OpenFuture;
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.util.Buffer;
/**
* TODO Add javadoc
*
* @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a>
*/
public class ChannelDirectTcpip extends AbstractClientChannel {
private final SshdSocketAddress local;
private final SshdSocketAddress remote;
private final PipedOutputStream pipe = new PipedOutputStream();
public ChannelDirectTcpip(SshdSocketAddress local, SshdSocketAddress remote) {
super("direct-tcpip");
if (local == null) {
try {
local = new SshdSocketAddress(InetAddress.getLocalHost().getHostName(), 0);
} catch (UnknownHostException e) {
throw new IllegalStateException("Unable to retrieve local host name");
}
}
if (remote == null) {
throw new IllegalArgumentException("Remote address must not be null");
}
this.local = local;
this.remote = remote;
}
@Override
protected OpenFuture internalOpen() throws IOException {
if (closeFuture.isClosed()) {
throw new SshException("Session has been closed");
}
openFuture = new DefaultOpenFuture(lock);
log.info("Send SSH_MSG_CHANNEL_OPEN on channel {}", id);
Buffer buffer = session.createBuffer(SshConstants.Message.SSH_MSG_CHANNEL_OPEN, 0);
buffer.putString(type);
buffer.putInt(id);
buffer.putInt(localWindow.getSize());
buffer.putInt(localWindow.getPacketSize());
buffer.putString(remote.getHostName());
buffer.putInt(remote.getPort());
buffer.putString(local.getHostName());
buffer.putInt(local.getPort());
writePacket(buffer);
return openFuture;
}
@Override
protected void doOpen() throws IOException {
out = new ChannelOutputStream(this, remoteWindow, log, SshConstants.Message.SSH_MSG_CHANNEL_DATA);
in = new PipedInputStream(pipe);
}
public OpenFuture open() throws IOException {
return internalOpen();
}
@Override
protected void doWriteData(byte[] data, int off, int len) throws IOException {
pipe.write(data, off, len);
pipe.flush();
localWindow.consumeAndCheck(len);
}
}