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/*
* Copyright 2015 Open Networking Laboratory
*
* 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.onosproject.mfwd.impl;
import org.apache.felix.scr.annotations.Activate;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Service;
import org.apache.felix.scr.annotations.Deactivate;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.ReferenceCardinality;
import org.onlab.packet.Ethernet;
import org.onosproject.net.intent.Intent;
import org.onosproject.net.intent.SinglePointToMultiPointIntent;
import org.onosproject.net.intent.IntentService;
import org.onosproject.net.flow.DefaultTrafficSelector;
import org.onosproject.net.flow.DefaultTrafficTreatment;
import org.onosproject.net.flow.TrafficSelector;
import org.onosproject.net.flow.TrafficTreatment;
@Component(immediate = true)
@Service(value = org.onosproject.mfwd.impl.McastIntentManager.class)
public class McastIntentManager {
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected IntentService intentService;
private static McastIntentManager instance;
public McastIntentManager() {
instance = this;
}
/**
* Active this component.
*/
@Activate
public void activate() { }
/**
* Deactivate this component.
*/
@Deactivate
public void deactivate() {
withdrawAllIntents();
}
/**
* Get instance of this intentManager.
*
* @return the instance of this intent manager.
*/
public static McastIntentManager getInstance() {
if (instance == null) {
instance = new McastIntentManager();
}
return instance;
}
/**
* Install the PointToMultipoint forwarding intent.
*
* @param mroute multicast route entry
* @return the intent that has been set or null otherwise
*/
public SinglePointToMultiPointIntent setIntent(McastRoute mroute) {
TrafficSelector.Builder selector = DefaultTrafficSelector.builder();
TrafficTreatment treatment = DefaultTrafficTreatment.emptyTreatment();
if (mroute.getIngressPoint() == null) {
return null;
}
/*
* Match the group AND source addresses. We will also check ether type to
* determine if we are doing ipv4 or ipv6.
*
* If we really wanted to be pendantic we could put in a
* condition to make sure the ethernet MAC address was also
* mcast.
*/
selector.matchEthType(Ethernet.TYPE_IPV4)
.matchIPDst(mroute.getGaddr())
.matchIPSrc(mroute.getSaddr());
SinglePointToMultiPointIntent.Builder builder = SinglePointToMultiPointIntent.builder()
.appId(McastForwarding.getAppId())
.selector(selector.build())
.treatment(treatment)
.ingressPoint(mroute.getIngressPoint().getConnectPoint());
// allowing intent to be pushed without egress points means we can drop packets.
if (!mroute.getEgressPoints().isEmpty()) {
builder.egressPoints(mroute.getEgressConnectPoints());
}
SinglePointToMultiPointIntent intent = builder.build();
intentService.submit(intent);
mroute.setDirty(false);
return intent;
}
/**
* Withdraw the intent represented by this route.
*
* @param mroute the mcast route whose intent we want to remove
*/
public void withdrawIntent(McastRoute mroute) {
Intent intent = intentService.getIntent(mroute.getIntentKey());
intentService.withdraw(intent);
mroute.setDirty(false);
}
/**
* Withdraw all intents.
*
* This will be called from the deactivate method so we don't leave
* a mess behind us after we leave.
*/
public void withdrawAllIntents() {
for (Intent intent : intentService.getIntents()) {
intentService.withdraw(intent);
}
}
}
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