/*******************************************************************************
*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: chris grzegorczyk <grze@eucalyptus.com>
*/
package com.eucalyptus.dns;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import org.apache.log4j.Logger;
import org.xbill.DNS.ARecord;
import org.xbill.DNS.DClass;
import org.xbill.DNS.NSRecord;
import org.xbill.DNS.Name;
import org.xbill.DNS.PTRRecord;
import org.xbill.DNS.RRset;
import org.xbill.DNS.Record;
import org.xbill.DNS.SOARecord;
import org.xbill.DNS.TextParseException;
import com.eucalyptus.cluster.VmInstance;
import com.eucalyptus.cluster.VmInstances;
import edu.ucsb.eucalyptus.cloud.entities.SystemConfiguration;
public class TransientZone extends Zone {
private static Logger LOG = Logger.getLogger( TransientZone.class );
private static int ttl = 604800;
private static Zone INSTANCE_EXTERNAL = null;
private static Zone INSTANCE_INTERNAL = null;
public TransientZone( Name name, Record[] records ) throws IOException {
super(name,records);
}
public static Zone getInstanceExternalZone( ) {
try {
Name name = getExternalName( );
long serial = 1;
long refresh = 86400;
long retry = ttl;
long expires = 2419200;
long minimum = ttl;
Record soarec = new SOARecord( name, DClass.IN, ttl, name, Name.fromString( "root." + name.toString( ) ), serial,
refresh, retry, expires, minimum );
long nsTTL = 604800;
Record nsrec = new NSRecord( name, DClass.IN, nsTTL,
Name.fromString( InetAddress.getByName( SystemConfiguration.getCloudHostAddress( ) ).getCanonicalHostName( )+"." ) );
return new TransientZone( name, new Record[] { soarec, nsrec } );
} catch ( Exception e ) {
LOG.error( e, e );
return null;
}
}
public static Name getExternalName( ) throws TextParseException {
String nameString = "eucalyptus."+SystemConfiguration.getSystemConfiguration( ).getDnsDomain( )+".";
Name name = Name.fromString( nameString );
return name;
}
public static Zone getInstanceInternalZone( ) {
try {
Name name = getInternalName( );
long serial = 1;
long refresh = 86400;
long retry = ttl;
long expires = 2419200;
long minimum = ttl;
Record soarec = new SOARecord( name, DClass.IN, ttl, name, Name.fromString( "root." + name.toString( ) ), serial,
refresh, retry, expires, minimum );
long nsTTL = 604800;
Record nsrec = new NSRecord( name, DClass.IN, nsTTL,
Name.fromString( InetAddress.getByName( SystemConfiguration.getCloudHostAddress( ) ).getCanonicalHostName( ) +".") );
return new TransientZone( name, new Record[] { soarec, nsrec } );
} catch ( Exception e ) {
LOG.error( e, e );
return null;
}
}
public static Name getInternalName( ) throws TextParseException {
String nameString = "eucalyptus.internal.";
Name name = Name.fromString( nameString );
return name;
}
@Override
public SetResponse findRecords( Name name, int type ) {
if( name.toString( ).matches("euca-.+{3}-.+{3}-.+{3}-.+{3}\\..*") ) {
try {
String[] tryIp = name.toString( ).replaceAll( "euca-", "" ).replaceAll("\\.eucalyptus.*","").split("-");
if( tryIp.length < 4 ) return super.findRecords( name, type );
String ipCandidate = new StringBuffer()
.append(tryIp[0]).append(".")
.append(tryIp[1]).append(".")
.append(tryIp[2]).append(".")
.append(tryIp[3]).toString( );
try {
VmInstances.getInstance( ).lookupByPublicIp( ipCandidate );
} catch ( Exception e ) {
try {
VmInstances.getInstance( ).lookupByInstanceIp( ipCandidate );
} catch ( Exception e1 ) {
return super.findRecords( name, type );
}
}
InetAddress ip = InetAddress.getByName( ipCandidate );
SetResponse resp = new SetResponse(SetResponse.SUCCESSFUL);
resp.addRRset( new RRset( new ARecord( name, 1, ttl, ip ) ) );
return resp;
} catch ( Throwable e ) {
return super.findRecords( name, type );
}
} else if (name.toString().endsWith(".in-addr.arpa.")) {
int index = name.toString().indexOf(".in-addr.arpa.");
Name target;
if ( index > 0 ) {
String ipString = name.toString().substring(0, index);
String[] parts = ipString.split("\\.");
String ipCandidate;
if (parts.length == 4) {
ipCandidate = new StringBuffer()
.append(parts[3]).append(".")
.append(parts[2]).append(".")
.append(parts[1]).append(".")
.append(parts[0]).toString( );
} else {
return super.findRecords( name, type );
}
try {
VmInstance instance = VmInstances.getInstance( ).lookupByPublicIp( ipCandidate );
target = new Name(instance.getNetworkConfig().getPublicDnsName() + ".");
} catch ( Exception e ) {
try {
VmInstance instance = VmInstances.getInstance( ).lookupByInstanceIp( ipCandidate );
target = new Name(instance.getNetworkConfig().getPrivateDnsName() + ".");
} catch ( Exception e1 ) {
return super.findRecords( name, type );
}
}
SetResponse resp = new SetResponse(SetResponse.SUCCESSFUL);
resp.addRRset( new RRset( new PTRRecord( name, DClass.IN, ttl, target ) ) );
return resp;
} else {
return super.findRecords( name, type );
}
} else {
return super.findRecords( name, type );
}
}
public static Zone getPtrZone(Name queryName) {
try {
String nameString = queryName.toString();
Name name;
int index = nameString.indexOf(".in-addr.arpa.");
if ( index > 0 ) {
String ipString = nameString.substring(0, index);
String[] parts = ipString.split("\\.");
//fix this for v6
if(parts.length == 4) {
nameString = nameString.substring(parts[0].length() + 1);
name = new Name(nameString);
} else {
return null;
}
} else {
return null;
}
long serial = 1;
long refresh = 86400;
long retry = ttl;
long expires = 2419200;
long minimum = ttl;
Record soarec = new SOARecord( name, DClass.IN, ttl, name, Name.fromString( "root." + name.toString( ) ), serial,
refresh, retry, expires, minimum );
long nsTTL = 604800;
Record nsrec = new NSRecord( name, DClass.IN, nsTTL,
Name.fromString( InetAddress.getByName( SystemConfiguration.getCloudHostAddress( ) ).getCanonicalHostName( ) +".") );
return new TransientZone( name, new Record[] { soarec, nsrec } );
} catch ( Exception e ) {
LOG.error( e, e );
return null;
}
}
}