/*
* Copyright (C) 2013 Tobias Brunner
* Copyright (C) 2012 Christoph Buehler
* Copyright (C) 2012 Patrick Loetscher
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
package org.strongswan.android.logic.imc.attributes;
import java.util.LinkedList;
import org.strongswan.android.logic.imc.collectors.Protocol;
import org.strongswan.android.utils.BufferedByteWriter;
import android.util.Pair;
/**
* PA-TNC Port Filter attribute (see section 4.2.6 of RFC 5792)
*
* 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Reserved |B| Protocol | Port Number |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Reserved |B| Protocol | Port Number |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
public class PortFilterAttribute implements Attribute
{
private final LinkedList<Pair<Protocol, Short>> mPorts = new LinkedList<Pair<Protocol, Short>>();
/**
* Add an open port with the given protocol and port number
* @param protocol transport protocol
* @param port port number
*/
public void addPort(Protocol protocol, short port)
{
mPorts.add(new Pair<Protocol, Short>(protocol, port));
}
@Override
public byte[] getEncoding()
{
BufferedByteWriter writer = new BufferedByteWriter();
for (Pair<Protocol, Short> port : mPorts)
{
/* we report open ports, so the BLOCKED flag is not set */
writer.put((byte)0);
writer.put(port.first.getValue());
writer.put16(port.second);
}
return writer.toByteArray();
}
}