/*
* Copyright (c) 2012 Alexander Diener,
*
* 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 3 of the License, or (at your option) any later
* version.
*
* 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.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package de.fhkn.in.uce.mediator.connectionhandling;
import java.net.Socket;
import de.fhkn.in.uce.mediator.peerregistry.UserData;
import de.fhkn.in.uce.mediator.peerregistry.UserList;
import de.fhkn.in.uce.mediator.util.MediatorUtil;
import de.fhkn.in.uce.plugininterface.mediator.HandleMessage;
import de.fhkn.in.uce.plugininterface.message.NATTraversalTechniqueAttribute;
import de.fhkn.in.uce.stun.attribute.Username;
import de.fhkn.in.uce.stun.message.Message;
/**
* Handler which processes requests for supported NAT traversal techniques for a
* user. The handler adds the {@link NATTraversalTechniqueAttribute}s of the
* supported techniques to the response message and sends it.
*
* @author Alexander Diener (aldiener@htwg-konstanz.de)
*
*/
public final class DefaultTravTechRequestHandling implements HandleMessage {
private final UserList userList;
private final MediatorUtil mediatorUtil;
/**
* Creates a {@link DefaultTravTechRequestHandling}.
*/
public DefaultTravTechRequestHandling() {
this.userList = UserList.INSTANCE;
this.mediatorUtil = MediatorUtil.INSTANCE;
}
@Override
public void handleMessage(final Message message, final Socket controlConnection) throws Exception {
this.mediatorUtil.checkForAttribute(message, Username.class);
final Username username = message.getAttribute(Username.class);
final UserData user = this.userList.getUserDataByUserId(username.getUsernameAsString());
final Message response = message.buildSuccessResponse();
for (final NATTraversalTechniqueAttribute attr : user.getSupportedNatTraversalTechniques()) {
response.addAttribute(attr);
}
response.writeTo(controlConnection.getOutputStream());
}
@Override
public NATTraversalTechniqueAttribute getAttributeForTraversalTechnique() {
return new NATTraversalTechniqueAttribute(Integer.MAX_VALUE);
}
}