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/*
* Copyright 2015-present Open Networking Foundation
*
* 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.segmentrouting.grouphandler;
import static com.google.common.base.Preconditions.checkArgument;
import static org.slf4j.LoggerFactory.getLogger;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import org.onlab.packet.MacAddress;
import org.onlab.packet.MplsLabel;
import org.onosproject.core.ApplicationId;
import org.onosproject.segmentrouting.SegmentRoutingManager;
import org.onosproject.segmentrouting.config.DeviceConfigNotFoundException;
import org.onosproject.segmentrouting.config.DeviceProperties;
import org.onosproject.segmentrouting.grouphandler.GroupBucketIdentifier.BucketOutputType;
import org.onosproject.net.DeviceId;
import org.onosproject.net.PortNumber;
import org.onosproject.net.flow.DefaultTrafficTreatment;
import org.onosproject.net.flow.TrafficTreatment;
import org.onosproject.net.flowobjective.FlowObjectiveService;
import org.onosproject.net.group.GroupBucket;
import org.onosproject.net.link.LinkService;
import org.slf4j.Logger;
/**
* A module to create group chains based on the specified device
* ports and label stack to be applied on each port.
*/
public class PolicyGroupHandler extends DefaultGroupHandler {
private final Logger log = getLogger(getClass());
private HashMap dependentGroups = new HashMap<>();
/**
* Constructs policy group handler.
*
* @param deviceId device identifier
* @param appId application identifier
* @param config interface to retrieve the device properties
* @param linkService link service object
* @param flowObjService flow objective service object
* @param srManager segment routing manager
*/
public PolicyGroupHandler(DeviceId deviceId,
ApplicationId appId,
DeviceProperties config,
LinkService linkService,
FlowObjectiveService flowObjService,
SegmentRoutingManager srManager) {
super(deviceId, appId, config, linkService, flowObjService, srManager);
}
/**
* Creates policy group chain.
*
* @param id unique identifier associated with the policy group
* @param params a list of policy group params
* @return policy group identifier
*/
public PolicyGroupIdentifier createPolicyGroupChain(String id,
List params) {
List bucketIds = new ArrayList<>();
for (PolicyGroupParams param: params) {
List ports = param.getPorts();
if (ports == null) {
log.warn("createPolicyGroupChain in sw {} with wrong "
+ "input parameters", deviceId);
return null;
}
int labelStackSize = (param.getLabelStack() != null) ?
param.getLabelStack().size() : 0;
if (labelStackSize > 1) {
for (PortNumber sp : ports) {
PolicyGroupIdentifier previousGroupkey = null;
DeviceId neighbor = portDeviceMap.get(sp);
for (int idx = 0; idx < param.getLabelStack().size(); idx++) {
int label = param.getLabelStack().get(idx);
if (idx == (labelStackSize - 1)) {
// Innermost Group
GroupBucketIdentifier bucketId =
new GroupBucketIdentifier(label,
previousGroupkey);
bucketIds.add(bucketId);
} else if (idx == 0) {
// Outermost Group
List outBuckets = new ArrayList<>();
GroupBucketIdentifier bucketId =
new GroupBucketIdentifier(label, sp);
PolicyGroupIdentifier key = new
PolicyGroupIdentifier(id,
Collections.singletonList(param),
Collections.singletonList(bucketId));
MacAddress neighborEthDst;
try {
neighborEthDst = deviceConfig.getDeviceMac(neighbor);
} catch (DeviceConfigNotFoundException e) {
log.warn(e.getMessage()
+ " Skipping createPolicyGroupChain for this label.");
continue;
}
TrafficTreatment.Builder tBuilder =
DefaultTrafficTreatment.builder();
tBuilder.setOutput(sp)
.setEthDst(neighborEthDst)
.setEthSrc(nodeMacAddr)
.pushMpls()
.setMpls(MplsLabel.mplsLabel(label));
/*outBuckets.add(DefaultGroupBucket.
createSelectGroupBucket(tBuilder.build()));
GroupDescription desc = new
DefaultGroupDescription(deviceId,
GroupDescription.Type.INDIRECT,
new GroupBuckets(outBuckets));
//TODO: BoS*/
previousGroupkey = key;
//groupService.addGroup(desc);
//TODO: Use nextObjective APIs here
} else {
// Intermediate Groups
GroupBucketIdentifier bucketId =
new GroupBucketIdentifier(label,
previousGroupkey);
PolicyGroupIdentifier key = new
PolicyGroupIdentifier(id,
Collections.singletonList(param),
Collections.singletonList(bucketId));
// Add to group dependency list
dependentGroups.put(previousGroupkey, key);
previousGroupkey = key;
}
}
}
} else {
int label = -1;
if (labelStackSize == 1) {
label = param.getLabelStack().get(0);
}
for (PortNumber sp : ports) {
GroupBucketIdentifier bucketId =
new GroupBucketIdentifier(label, sp);
bucketIds.add(bucketId);
}
}
}
PolicyGroupIdentifier innermostGroupkey = null;
if (!bucketIds.isEmpty()) {
innermostGroupkey = new
PolicyGroupIdentifier(id,
params,
bucketIds);
// Add to group dependency list
boolean fullyResolved = true;
for (GroupBucketIdentifier bucketId:bucketIds) {
if (bucketId.type() == BucketOutputType.GROUP) {
dependentGroups.put(bucketId.outGroup(),
innermostGroupkey);
fullyResolved = false;
}
}
if (fullyResolved) {
List outBuckets = new ArrayList<>();
for (GroupBucketIdentifier bucketId : bucketIds) {
DeviceId neighbor = portDeviceMap.
get(bucketId.outPort());
MacAddress neighborEthDst;
try {
neighborEthDst = deviceConfig.getDeviceMac(neighbor);
} catch (DeviceConfigNotFoundException e) {
log.warn(e.getMessage()
+ " Skipping createPolicyGroupChain for this bucketId.");
continue;
}
TrafficTreatment.Builder tBuilder =
DefaultTrafficTreatment.builder();
tBuilder.setOutput(bucketId.outPort())
.setEthDst(neighborEthDst)
.setEthSrc(nodeMacAddr);
if (bucketId.label() != DestinationSet.NO_EDGE_LABEL) {
tBuilder.pushMpls()
.setMpls(MplsLabel.mplsLabel(bucketId.label()));
}
//TODO: BoS
/*outBuckets.add(DefaultGroupBucket.
createSelectGroupBucket(tBuilder.build()));*/
}
/*GroupDescription desc = new
DefaultGroupDescription(deviceId,
GroupDescription.Type.SELECT,
new GroupBuckets(outBuckets));
groupService.addGroup(desc);*/
//TODO: Use nextObjective APIs here
}
}
return innermostGroupkey;
}
//TODO: Use nextObjective APIs to handle the group chains
/*
@Override
protected void handleGroupEvent(GroupEvent event) {}
*/
/**
* Generates policy group key.
*
* @param id unique identifier associated with the policy group
* @param params a list of policy group params
* @return policy group identifier
*/
public PolicyGroupIdentifier generatePolicyGroupKey(String id,
List params) {
List bucketIds = new ArrayList<>();
for (PolicyGroupParams param: params) {
List ports = param.getPorts();
if (ports == null) {
log.warn("generateGroupKey in sw {} with wrong "
+ "input parameters", deviceId);
return null;
}
int labelStackSize = (param.getLabelStack() != null)
? param.getLabelStack().size() : 0;
if (labelStackSize > 1) {
for (PortNumber sp : ports) {
PolicyGroupIdentifier previousGroupkey = null;
for (int idx = 0; idx < param.getLabelStack().size(); idx++) {
int label = param.getLabelStack().get(idx);
if (idx == (labelStackSize - 1)) {
// Innermost Group
GroupBucketIdentifier bucketId =
new GroupBucketIdentifier(label,
previousGroupkey);
bucketIds.add(bucketId);
} else if (idx == 0) {
// Outermost Group
GroupBucketIdentifier bucketId =
new GroupBucketIdentifier(label, sp);
PolicyGroupIdentifier key = new
PolicyGroupIdentifier(id,
Collections.singletonList(param),
Collections.singletonList(bucketId));
previousGroupkey = key;
} else {
// Intermediate Groups
GroupBucketIdentifier bucketId =
new GroupBucketIdentifier(label,
previousGroupkey);
PolicyGroupIdentifier key = new
PolicyGroupIdentifier(id,
Collections.singletonList(param),
Collections.singletonList(bucketId));
previousGroupkey = key;
}
}
}
} else {
int label = -1;
if (labelStackSize == 1) {
label = param.getLabelStack().get(0);
}
for (PortNumber sp : ports) {
GroupBucketIdentifier bucketId =
new GroupBucketIdentifier(label, sp);
bucketIds.add(bucketId);
}
}
}
PolicyGroupIdentifier innermostGroupkey = null;
if (!bucketIds.isEmpty()) {
innermostGroupkey = new
PolicyGroupIdentifier(id,
params,
bucketIds);
}
return innermostGroupkey;
}
/**
* Removes policy group chain.
*
* @param key policy group identifier
*/
public void removeGroupChain(PolicyGroupIdentifier key) {
checkArgument(key != null);
List groupsToBeDeleted = new ArrayList<>();
groupsToBeDeleted.add(key);
Iterator it =
groupsToBeDeleted.iterator();
while (it.hasNext()) {
PolicyGroupIdentifier innerMostGroupKey = it.next();
for (GroupBucketIdentifier bucketId:
innerMostGroupKey.bucketIds()) {
if (bucketId.type() != BucketOutputType.GROUP) {
groupsToBeDeleted.add(bucketId.outGroup());
}
}
/*groupService.removeGroup(deviceId,
getGroupKey(innerMostGroupKey),
appId);*/
//TODO: Use nextObjective APIs here
it.remove();
}
}
}
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