// SMSLib for Java v3
// A Java API library for sending and receiving SMS via a GSM modem
// or other supported gateways.
// Web Site: http://www.smslib.org
//
// Copyright (C) 2002-2012, Thanasis Delenikas, Athens/GREECE.
// SMSLib is distributed under the terms of the Apache License version 2.0
//
// 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 org.smslib.modem;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.NoSuchAlgorithmException;
import java.util.StringTokenizer;
import javax.net.ssl.SSLContext;
import org.apache.commons.net.telnet.EchoOptionHandler;
import org.apache.commons.net.telnet.InvalidTelnetOptionException;
import org.apache.commons.net.telnet.SimpleOptionHandler;
import org.apache.commons.net.telnet.SuppressGAOptionHandler;
import org.apache.commons.net.telnet.TelnetClient;
import org.apache.commons.net.telnet.TerminalTypeOptionHandler;
import org.smslib.AGateway.GatewayStatuses;
import org.smslib.GatewayException;
import org.smslib.Service;
import org.smslib.helper.Logger;
import org.smslib.modem.ModemGateway.IPProtocols;
class IPModemDriver extends AModemDriver
{
private String ipAddress;
private int ipPort;
private TelnetClient tc;
private InputStream in;
private OutputStream out;
private Peeker peeker;
private TerminalTypeOptionHandler ttopt = new TerminalTypeOptionHandler("VT100", false, false, true, false);
private SimpleOptionHandler binaryopt = new SimpleOptionHandler(0, true, false, true, false);
private EchoOptionHandler echoopt = new EchoOptionHandler(true, false, true, false);
private SuppressGAOptionHandler gaopt = new SuppressGAOptionHandler(true, true, true, true);
protected IPModemDriver(ModemGateway myGateway, String deviceParms)
{
super(myGateway, deviceParms);
StringTokenizer tokens = new StringTokenizer(deviceParms, ":");
this.ipAddress = tokens.nextToken();
this.ipPort = Integer.parseInt(tokens.nextToken());
this.tc = null;
}
@Override
protected void connectPort() throws GatewayException, IOException, InterruptedException
{
try
{
Logger.getInstance().logInfo("Opening: " + this.ipAddress + " @" + this.ipPort, null, getGateway().getGatewayId());
this.tc = new TelnetClient();
this.tc.addOptionHandler(this.ttopt);
this.tc.addOptionHandler(this.echoopt);
this.tc.addOptionHandler(this.gaopt);
if (getGateway().getIpProtocol() == IPProtocols.BINARY) this.tc.addOptionHandler(this.binaryopt); // Make telnet session binary, so ^Z in ATHander.Sendmessage is send raw!
if (getGateway().getIpEncryption())
{
try
{
this.tc.setSocketFactory(SSLContext.getInstance("Default").getSocketFactory());
}
catch (NoSuchAlgorithmException e)
{
Logger.getInstance().logError("Unable to find algorithm needed for using SSL", e, getGateway().getGatewayId());
// TODO: although not supposed to happen, something should be done if it does
}
}
this.tc.connect(this.ipAddress, this.ipPort);
this.in = this.tc.getInputStream();
this.out = this.tc.getOutputStream();
this.peeker = new Peeker();
}
catch (InvalidTelnetOptionException e)
{
throw new GatewayException("Unsupported telnet option for the selected IP connection.");
}
}
@Override
protected void disconnectPort() throws IOException, InterruptedException
{
Logger.getInstance().logInfo("Closing: " + this.ipAddress + " @" + this.ipPort, null, getGateway().getGatewayId());
synchronized (getSYNCReader())
{
if (this.tc != null) this.tc.disconnect();
this.tc = null;
if (this.peeker != null)
{
this.peeker.interrupt();
this.peeker.join();
}
this.peeker = null;
}
}
@Override
protected void clear() throws IOException
{
while (portHasData())
read();
}
@Override
protected boolean portHasData() throws IOException
{
return (this.in.available() > 0);
}
@Override
public void write(char c) throws IOException
{
this.out.write((short) c);
this.out.flush();
}
@Override
public void write(byte[] s) throws IOException
{
this.out.write(s);
this.out.flush();
}
@Override
protected int read() throws IOException
{
return this.in.read();
}
TelnetClient getTc()
{
return this.tc;
}
private class Peeker extends Thread
{
public Peeker()
{
setPriority(MIN_PRIORITY);
start();
}
@Override
public void run()
{
Logger.getInstance().logDebug("Peeker started.", null, getGateway().getGatewayId());
while (true)
{
try
{
if (getTc() != null)
{
if (portHasData())
{
synchronized (getSYNCReader())
{
setDataReceived(true);
getSYNCReader().notifyAll();
}
}
}
sleep(Service.getInstance().getSettings().SERIAL_POLLING_INTERVAL);
}
catch (InterruptedException e)
{
if (getTc() == null) break;
}
catch (IOException e)
{
getGateway().setStatus(GatewayStatuses.RESTART);
}
}
Logger.getInstance().logDebug("Peeker stopped.", null, getGateway().getGatewayId());
}
}
}