/*
* Copyright (C) 2013 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package org.glyptodon.guacamole.net;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
import javax.net.SocketFactory;
import javax.net.ssl.SSLSocketFactory;
import org.glyptodon.guacamole.GuacamoleException;
import org.glyptodon.guacamole.GuacamoleServerException;
import org.glyptodon.guacamole.io.GuacamoleReader;
import org.glyptodon.guacamole.io.GuacamoleWriter;
import org.glyptodon.guacamole.io.ReaderGuacamoleReader;
import org.glyptodon.guacamole.io.WriterGuacamoleWriter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Provides abstract socket-like access to a Guacamole connection over SSL to
* a given hostname and port.
*
* @author Michael Jumper
*/
public class SSLGuacamoleSocket implements GuacamoleSocket {
/**
* Logger for this class.
*/
private Logger logger = LoggerFactory.getLogger(SSLGuacamoleSocket.class);
/**
* The GuacamoleReader this socket should read from.
*/
private GuacamoleReader reader;
/**
* The GuacamoleWriter this socket should write to.
*/
private GuacamoleWriter writer;
/**
* The number of milliseconds to wait for data on the TCP socket before
* timing out.
*/
private static final int SOCKET_TIMEOUT = 15000;
/**
* The TCP socket that the GuacamoleReader and GuacamoleWriter exposed
* by this class should affect.
*/
private Socket sock;
/**
* Creates a new SSLGuacamoleSocket which reads and writes instructions
* to the Guacamole instruction stream of the Guacamole proxy server
* running at the given hostname and port using SSL.
*
* @param hostname The hostname of the Guacamole proxy server to connect to.
* @param port The port of the Guacamole proxy server to connect to.
* @throws GuacamoleException If an error occurs while connecting to the
* Guacamole proxy server.
*/
public SSLGuacamoleSocket(String hostname, int port) throws GuacamoleException {
// Get factory for SSL sockets
SocketFactory socket_factory = SSLSocketFactory.getDefault();
try {
logger.debug("Connecting to guacd at {}:{} via SSL/TLS.",
hostname, port);
// Get address
SocketAddress address = new InetSocketAddress(
InetAddress.getByName(hostname),
port
);
// Connect with timeout
sock = socket_factory.createSocket();
sock.connect(address, SOCKET_TIMEOUT);
// Set read timeout
sock.setSoTimeout(SOCKET_TIMEOUT);
// On successful connect, retrieve I/O streams
reader = new ReaderGuacamoleReader(new InputStreamReader(sock.getInputStream(), "UTF-8"));
writer = new WriterGuacamoleWriter(new OutputStreamWriter(sock.getOutputStream(), "UTF-8"));
}
catch (IOException e) {
throw new GuacamoleServerException(e);
}
}
@Override
public void close() throws GuacamoleException {
try {
logger.debug("Closing socket to guacd.");
sock.close();
}
catch (IOException e) {
throw new GuacamoleServerException(e);
}
}
@Override
public GuacamoleReader getReader() {
return reader;
}
@Override
public GuacamoleWriter getWriter() {
return writer;
}
@Override
public boolean isOpen() {
return !sock.isClosed();
}
}