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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.driver.handshaker;
import org.onosproject.openflow.controller.driver.AbstractOpenFlowSwitch;
import org.onosproject.openflow.controller.driver.SwitchDriverSubHandshakeAlreadyStarted;
import org.onosproject.openflow.controller.driver.SwitchDriverSubHandshakeCompleted;
import org.onosproject.openflow.controller.driver.SwitchDriverSubHandshakeNotStarted;
import org.projectfloodlight.openflow.protocol.OFBarrierRequest;
import org.projectfloodlight.openflow.protocol.OFFlowMod;
import org.projectfloodlight.openflow.protocol.OFMessage;
import org.projectfloodlight.openflow.protocol.OFType;
import org.projectfloodlight.openflow.types.OFGroup;
import org.projectfloodlight.openflow.types.TableId;
import java.util.Collections;
import java.util.concurrent.atomic.AtomicBoolean;
/**
* Corsa switch handshaker.
*/
public class CorsaSwitchHandshaker extends AbstractOpenFlowSwitch {
private AtomicBoolean handshakeComplete = new AtomicBoolean(false);
private int barrierXid;
@Override
public Boolean supportNxRole() {
return false;
}
@Override
public void startDriverHandshake() {
if (startDriverHandshakeCalled) {
throw new SwitchDriverSubHandshakeAlreadyStarted();
}
startDriverHandshakeCalled = true;
OFFlowMod fm = factory().buildFlowDelete()
.setTableId(TableId.ALL)
.setOutGroup(OFGroup.ANY)
.build();
sendMsg(Collections.singletonList(fm));
barrierXid = getNextTransactionId();
OFBarrierRequest barrier = factory().buildBarrierRequest()
.setXid(barrierXid).build();
sendHandshakeMessage(barrier);
}
@Override
public boolean isDriverHandshakeComplete() {
if (!startDriverHandshakeCalled) {
throw new SwitchDriverSubHandshakeAlreadyStarted();
}
return handshakeComplete.get();
}
@Override
public void processDriverHandshakeMessage(OFMessage m) {
if (!startDriverHandshakeCalled) {
throw new SwitchDriverSubHandshakeNotStarted();
}
if (handshakeComplete.get()) {
throw new SwitchDriverSubHandshakeCompleted(m);
}
if (m.getType() == OFType.BARRIER_REPLY &&
m.getXid() == barrierXid) {
handshakeComplete.set(true);
}
}
}
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