/*
* Copyright 2010, 2011 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.
*
* This file may incorporate work covered by the following copyright and
* permission notice:
*
* 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 net.schmizz.sshj.connection.channel.direct;
import net.schmizz.sshj.common.Buffer;
import net.schmizz.sshj.common.Message;
import net.schmizz.sshj.common.SSHPacket;
import net.schmizz.sshj.connection.Connection;
import net.schmizz.sshj.connection.ConnectionException;
import net.schmizz.sshj.connection.channel.AbstractChannel;
import net.schmizz.sshj.connection.channel.Channel;
import net.schmizz.sshj.connection.channel.OpenFailException;
import net.schmizz.sshj.transport.TransportException;
import java.util.concurrent.TimeUnit;
/** Base class for direct channels whose open is initated by the client. */
public abstract class AbstractDirectChannel
extends AbstractChannel
implements Channel.Direct {
protected AbstractDirectChannel(Connection conn, String type) {
super(conn, type);
/*
* We expect to receive channel open confirmation/rejection and want to be able to next this packet.
*/
conn.attach(this);
}
@Override
public void open()
throws ConnectionException, TransportException {
trans.write(buildOpenReq());
open.await(conn.getTimeout(), TimeUnit.SECONDS);
}
private void gotOpenConfirmation(SSHPacket buf)
throws ConnectionException {
try {
init(buf.readUInt32AsInt(), buf.readUInt32AsInt(), buf.readUInt32AsInt());
} catch (Buffer.BufferException be) {
throw new ConnectionException(be);
}
open.set();
}
private void gotOpenFailure(SSHPacket buf)
throws ConnectionException {
try {
open.deliverError(new OpenFailException(getType(), buf.readUInt32AsInt(), buf.readString()));
} catch (Buffer.BufferException be) {
throw new ConnectionException(be);
}
finishOff();
}
protected SSHPacket buildOpenReq() {
return new SSHPacket(Message.CHANNEL_OPEN)
.putString(getType())
.putUInt32(getID())
.putUInt32(getLocalWinSize())
.putUInt32(getLocalMaxPacketSize());
}
@Override
protected void gotUnknown(Message cmd, SSHPacket buf)
throws ConnectionException, TransportException {
switch (cmd) {
case CHANNEL_OPEN_CONFIRMATION:
gotOpenConfirmation(buf);
break;
case CHANNEL_OPEN_FAILURE:
gotOpenFailure(buf);
break;
default:
super.gotUnknown(cmd, buf);
}
}
}