/*******************************************************************************
*Copyright (c) 2009 Eucalyptus Systems, Inc.
*
* 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, only version 3 of the License.
*
*
* This file 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/>.
*
* Please contact Eucalyptus Systems, Inc., 130 Castilian
* Dr., Goleta, CA 93101 USA or visit <http://www.eucalyptus.com/licenses/>
* if you need additional information or have any questions.
*
* This file may incorporate work covered under the following copyright and
* permission notice:
*
* Software License Agreement (BSD License)
*
* Copyright (c) 2008, Regents of the University of California
* All rights reserved.
*
* Redistribution and use of this software in source and binary forms, with
* or without modification, are permitted provided that the following
* conditions are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. USERS OF
* THIS SOFTWARE ACKNOWLEDGE THE POSSIBLE PRESENCE OF OTHER OPEN SOURCE
* LICENSED MATERIAL, COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS
* SOFTWARE, AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING
* IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA, SANTA
* BARBARA WHO WILL THEN ASCERTAIN THE MOST APPROPRIATE REMEDY, WHICH IN
* THE REGENTS’ DISCRETION MAY INCLUDE, WITHOUT LIMITATION, REPLACEMENT
* OF THE CODE SO IDENTIFIED, LICENSING OF THE CODE SO IDENTIFIED, OR
* WITHDRAWAL OF THE CODE CAPABILITY TO THE EXTENT NEEDED TO COMPLY WITH
* ANY SUCH LICENSES OR RIGHTS.
*******************************************************************************/
/*
*
* Author: Neil Soman neil@eucalyptus.com
*
* Parts of this code are licensed under the BSD license and carry the following copyright,
* Copyright (c) 1999-2004 Brian Wellington (bwelling@xbill.org)
* @author Brian Wellington <bwelling@xbill.org>
*
*/
package com.eucalyptus.cloud.ws;
import org.apache.log4j.Logger;
import org.xbill.DNS.Message;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
public class UDPHandler extends ConnectionHandler {
private static Logger LOG = Logger.getLogger( UDPHandler.class );
DatagramSocket socket;
public UDPHandler(DatagramSocket s) {
this.socket = s;
}
public void run() {
try {
final short udpLength = 512;
byte [] in = new byte[udpLength];
DatagramPacket indp = new DatagramPacket(in, in.length);
DatagramPacket outdp = null;
while (true) {
indp.setLength(in.length);
try {
socket.receive(indp);
}
catch (InterruptedIOException e) {
continue;
}
Message query;
byte [] response = null;
try {
query = new Message(in);
response = generateReply(query, in,
indp.getLength(),
null);
if (response == null)
continue;
}
catch (IOException e) {
response = formerrMessage(in);
}
if (outdp == null)
outdp = new DatagramPacket(response,
response.length,
indp.getAddress(),
indp.getPort());
else {
outdp.setData(response);
outdp.setLength(response.length);
outdp.setAddress(indp.getAddress());
outdp.setPort(indp.getPort());
}
socket.send(outdp);
}
}
catch (IOException e) {
LOG.error(e);
}
}
}