| /* |
| * Copyright 2016-present 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.pce.pceservice; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.LinkedList; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.IpPrefix; |
| import org.onlab.packet.MplsLabel; |
| import org.onlab.packet.TpPort; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.incubator.net.resource.label.DefaultLabelResource; |
| import org.onosproject.incubator.net.resource.label.LabelResource; |
| import org.onosproject.incubator.net.resource.label.LabelResourceId; |
| import org.onosproject.incubator.net.resource.label.LabelResourceAdminService; |
| import org.onosproject.incubator.net.resource.label.LabelResourceService; |
| import org.onosproject.incubator.net.tunnel.DefaultLabelStack; |
| import org.onosproject.incubator.net.tunnel.LabelStack; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.pce.pcestore.api.PceStore; |
| import org.onosproject.net.Link; |
| import org.onosproject.net.Path; |
| import org.onosproject.net.PortNumber; |
| import org.onosproject.net.flow.DefaultTrafficSelector; |
| import org.onosproject.net.flow.DefaultTrafficTreatment; |
| import org.onosproject.net.flow.TrafficSelector; |
| import org.onosproject.net.flow.TrafficTreatment; |
| import org.onosproject.net.flowobjective.DefaultForwardingObjective; |
| import org.onosproject.net.flowobjective.FlowObjectiveService; |
| import org.onosproject.net.flowobjective.ForwardingObjective; |
| import org.onosproject.net.flowobjective.Objective; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.collect.ArrayListMultimap; |
| import com.google.common.collect.Multimap; |
| |
| /** |
| * PCE SR-BE and SR-TE functionality. |
| * SR-BE: Each node (PCC) is allocated a node-SID (label) by the PCECC. The PCECC sends PCLabelUpd to |
| * update the label map of each node to all the nodes in the domain. |
| * SR-TE: apart from node-SID, Adj-SID is used where each adjacency is allocated an Adj-SID (label) by the PCECC. |
| * The PCECC sends PCLabelUpd to update the label map of each Adj to the corresponding nodes in the domain. |
| */ |
| public final class PceccSrTeBeHandler { |
| private static final Logger log = LoggerFactory.getLogger(PceccSrTeBeHandler.class); |
| |
| private static final String LABEL_RESOURCE_ADMIN_SERVICE_NULL = "Label Resource Admin Service cannot be null"; |
| private static final String LABEL_RESOURCE_SERVICE_NULL = "Label Resource Service cannot be null"; |
| private static final String PCE_STORE_NULL = "PCE Store cannot be null"; |
| private static final String DEVICE_SERVICE_NULL = "Device Service cannot be null"; |
| private static final String DEVICE_ID_NULL = "Device-Id cannot be null"; |
| private static final String LSR_ID_NULL = "LSR-Id cannot be null"; |
| private static final String DEVICE_ID_LSR_ID_MAP_NULL = "Device-Id and LSR-Id map cannot be null"; |
| private static final String LINK_NULL = "Link cannot be null"; |
| private static final String PATH_NULL = "Path cannot be null"; |
| private static final String LSR_ID = "lsrId"; |
| private static final int PREFIX_LENGTH = 32; |
| private static PceccSrTeBeHandler srTeHandlerInstance = null; |
| private LabelResourceAdminService labelRsrcAdminService; |
| private LabelResourceService labelRsrcService; |
| private FlowObjectiveService flowObjectiveService; |
| private PceStore pceStore; |
| private ApplicationId appId; |
| |
| /** |
| * Initializes default values. |
| */ |
| private PceccSrTeBeHandler() { |
| } |
| |
| /** |
| * Returns single instance of this class. |
| * |
| * @return this class single instance |
| */ |
| public static PceccSrTeBeHandler getInstance() { |
| if (srTeHandlerInstance == null) { |
| srTeHandlerInstance = new PceccSrTeBeHandler(); |
| } |
| return srTeHandlerInstance; |
| } |
| |
| /** |
| * Initialization of label manager interfaces and pce store. |
| * |
| * @param labelRsrcAdminService label resource admin service |
| * @param labelRsrcService label resource service |
| * @param pceStore PCE label store |
| */ |
| public void initialize(LabelResourceAdminService labelRsrcAdminService, |
| LabelResourceService labelRsrcService, |
| FlowObjectiveService flowObjectiveService, |
| ApplicationId appId, PceStore pceStore) { |
| this.labelRsrcAdminService = labelRsrcAdminService; |
| this.labelRsrcService = labelRsrcService; |
| this.flowObjectiveService = flowObjectiveService; |
| this.pceStore = pceStore; |
| this.appId = appId; |
| } |
| |
| /** |
| * Reserves the global label pool. |
| * |
| * @param beginLabel minimum value of global label space |
| * @param endLabel maximum value of global label space |
| * @return success or failure |
| */ |
| public boolean reserveGlobalPool(long beginLabel, long endLabel) { |
| checkNotNull(labelRsrcAdminService, LABEL_RESOURCE_ADMIN_SERVICE_NULL); |
| return labelRsrcAdminService.createGlobalPool(LabelResourceId.labelResourceId(beginLabel), |
| LabelResourceId.labelResourceId(endLabel)); |
| } |
| |
| /** |
| * Allocates node label from global node label pool to specific device. |
| * Configure this device with labels and lsrid mapping of all other devices and vice versa. |
| * |
| * @param specificDeviceId node label needs to be allocated to specific device |
| * @param specificLsrId lsrid of specific device |
| * @param deviceIdLsrIdMap deviceid and lsrid mapping |
| * @return success or failure |
| */ |
| public boolean allocateNodeLabel(DeviceId specificDeviceId, String specificLsrId, |
| Map<DeviceId, String> deviceIdLsrIdMap) { |
| long applyNum = 1; // For each node only one node label |
| LabelResourceId specificLabelId = null; |
| |
| checkNotNull(specificDeviceId, DEVICE_ID_NULL); |
| checkNotNull(specificLsrId, LSR_ID_NULL); |
| checkNotNull(deviceIdLsrIdMap, DEVICE_ID_LSR_ID_MAP_NULL); |
| checkNotNull(labelRsrcService, LABEL_RESOURCE_SERVICE_NULL); |
| checkNotNull(pceStore, PCE_STORE_NULL); |
| |
| // The specificDeviceId is the new device and is not there in the deviceIdLsrIdMap. |
| // So, first generate its label and configure label and its lsr-id to it. |
| Collection<LabelResource> result = labelRsrcService.applyFromGlobalPool(applyNum); |
| if (result.size() > 0) { |
| // Only one element (label-id) to retrieve |
| Iterator<LabelResource> iterator = result.iterator(); |
| DefaultLabelResource defaultLabelResource = (DefaultLabelResource) iterator.next(); |
| specificLabelId = defaultLabelResource.labelResourceId(); |
| if (specificLabelId == null) { |
| log.error("Unable to retrieve global node label for a device id {}.", specificDeviceId.toString()); |
| return false; |
| } |
| } else { |
| log.error("Unable to allocate global node label for a device id {}.", specificDeviceId.toString()); |
| return false; |
| } |
| |
| pceStore.addGlobalNodeLabel(specificDeviceId, specificLabelId); |
| // Push its label information into specificDeviceId |
| advertiseNodeLabelRule(specificDeviceId, specificLabelId, |
| IpPrefix.valueOf(IpAddress.valueOf(specificLsrId), PREFIX_LENGTH), |
| Objective.Operation.ADD, false); |
| |
| // Configure (node-label, lsr-id) mapping of each devices in list to specific device and vice versa. |
| for (Map.Entry<DeviceId, String> element:deviceIdLsrIdMap.entrySet()) { |
| DeviceId otherDevId = element.getKey(); |
| String otherLsrId = element.getValue(); |
| if (otherLsrId == null) { |
| log.error("The lsr-id of device id {} is null.", otherDevId.toString()); |
| releaseNodeLabel(specificDeviceId, specificLsrId, deviceIdLsrIdMap); |
| return false; |
| } |
| |
| // Label for other device in list should be already allocated. |
| LabelResourceId otherLabelId = pceStore.getGlobalNodeLabel(otherDevId); |
| if (otherLabelId == null) { |
| log.error("Unable to find global node label in store for a device id {}.", otherDevId.toString()); |
| releaseNodeLabel(specificDeviceId, specificLsrId, deviceIdLsrIdMap); |
| return false; |
| } |
| |
| // Push to device |
| // Push label information of specificDeviceId to otherDevId in list and vice versa. |
| advertiseNodeLabelRule(otherDevId, specificLabelId, IpPrefix.valueOf(IpAddress.valueOf(specificLsrId), |
| PREFIX_LENGTH), Objective.Operation.ADD, false); |
| advertiseNodeLabelRule(specificDeviceId, otherLabelId, IpPrefix.valueOf(IpAddress.valueOf(otherLsrId), |
| PREFIX_LENGTH), Objective.Operation.ADD, false); |
| } |
| |
| return true; |
| } |
| |
| /** |
| * Releases assigned node label of specific device from global node label pool and pce store. |
| * and remove configured this node label from all other devices. |
| * |
| * @param specificDeviceId node label needs to be released for specific device |
| * @param specificLsrId lsrid of specific device |
| * @param deviceIdLsrIdMap deviceid and lsrid mapping |
| * @return success or failure |
| */ |
| public boolean releaseNodeLabel(DeviceId specificDeviceId, String specificLsrId, |
| Map<DeviceId, String> deviceIdLsrIdMap) { |
| checkNotNull(specificDeviceId, DEVICE_ID_NULL); |
| checkNotNull(specificLsrId, LSR_ID_NULL); |
| checkNotNull(deviceIdLsrIdMap, DEVICE_ID_LSR_ID_MAP_NULL); |
| checkNotNull(labelRsrcService, LABEL_RESOURCE_SERVICE_NULL); |
| checkNotNull(pceStore, PCE_STORE_NULL); |
| boolean retValue = true; |
| |
| // Release node label entry of this specific device from all other devices |
| // Retrieve node label of this specific device from store |
| LabelResourceId labelId = pceStore.getGlobalNodeLabel(specificDeviceId); |
| if (labelId == null) { |
| log.error("Unable to retrieve label of a device id {} from store.", specificDeviceId.toString()); |
| return false; |
| } |
| |
| // Go through all devices in the map and remove label entry |
| for (Map.Entry<DeviceId, String> element:deviceIdLsrIdMap.entrySet()) { |
| DeviceId otherDevId = element.getKey(); |
| |
| // Remove this specific device label information from all other nodes except |
| // this specific node where connection already lost. |
| if (!specificDeviceId.equals(otherDevId)) { |
| advertiseNodeLabelRule(otherDevId, labelId, IpPrefix.valueOf(IpAddress.valueOf(specificLsrId), |
| PREFIX_LENGTH), Objective.Operation.REMOVE, false); |
| } |
| } |
| |
| // Release from label manager |
| Set<LabelResourceId> release = new HashSet<>(); |
| release.add(labelId); |
| if (!labelRsrcService.releaseToGlobalPool(release)) { |
| log.error("Unable to release label id {} from label manager.", labelId.toString()); |
| retValue = false; |
| } |
| |
| // Remove from store |
| if (!pceStore.removeGlobalNodeLabel(specificDeviceId)) { |
| log.error("Unable to remove global node label id {} from store.", labelId.toString()); |
| retValue = false; |
| } |
| |
| return retValue; |
| } |
| |
| /** |
| * Allocates adjacency label to a link from local resource pool by a specific device id. |
| * |
| * @param link between devices |
| * @return success or failure |
| */ |
| public boolean allocateAdjacencyLabel(Link link) { |
| long applyNum = 1; // Single label to each link. |
| DeviceId srcDeviceId = link.src().deviceId(); |
| Collection<LabelResource> labelList; |
| |
| checkNotNull(link, LINK_NULL); |
| checkNotNull(labelRsrcService, LABEL_RESOURCE_SERVICE_NULL); |
| checkNotNull(pceStore, PCE_STORE_NULL); |
| |
| // Allocate adjacency label to a link from label manager. |
| // Take label from source device pool to allocate. |
| labelList = labelRsrcService.applyFromDevicePool(srcDeviceId, applyNum); |
| if (labelList.size() <= 0) { |
| log.error("Unable to allocate label to a device id {}.", srcDeviceId.toString()); |
| return false; |
| } |
| |
| // Currently only one label to a device. So, no need to iterate through list |
| Iterator<LabelResource> iterator = labelList.iterator(); |
| DefaultLabelResource defaultLabelResource = (DefaultLabelResource) iterator.next(); |
| LabelResourceId labelId = defaultLabelResource.labelResourceId(); |
| if (labelId == null) { |
| log.error("Unable to allocate label to a device id {}.", srcDeviceId.toString()); |
| return false; |
| } |
| log.debug("Allocated adjacency label {} to a link {}.", labelId.toString(), |
| link.toString()); |
| |
| // Push adjacency label to device |
| installAdjLabelRule(srcDeviceId, labelId, link.src().port(), link.dst().port(), Objective.Operation.ADD); |
| |
| // Save in store |
| pceStore.addAdjLabel(link, labelId); |
| return true; |
| } |
| |
| /** |
| * Releases unused adjacency labels from device pools. |
| * |
| * @param link between devices |
| * @return success or failure |
| */ |
| public boolean releaseAdjacencyLabel(Link link) { |
| checkNotNull(link, LINK_NULL); |
| checkNotNull(labelRsrcService, LABEL_RESOURCE_SERVICE_NULL); |
| checkNotNull(pceStore, PCE_STORE_NULL); |
| boolean retValue = true; |
| |
| // Retrieve link label from store |
| LabelResourceId labelId = pceStore.getAdjLabel(link); |
| if (labelId == null) { |
| log.error("Unabel to retrieve label for a link {} from store.", link.toString()); |
| return false; |
| } |
| |
| // Device |
| DeviceId srcDeviceId = link.src().deviceId(); |
| |
| // Release adjacency label from device |
| installAdjLabelRule(srcDeviceId, labelId, link.src().port(), link.dst().port(), Objective.Operation.REMOVE); |
| |
| // Release link label from label manager |
| Multimap<DeviceId, LabelResource> release = ArrayListMultimap.create(); |
| DefaultLabelResource defaultLabelResource = new DefaultLabelResource(srcDeviceId, labelId); |
| release.put(srcDeviceId, defaultLabelResource); |
| if (!labelRsrcService.releaseToDevicePool(release)) { |
| log.error("Unable to release label id {} from label manager.", labelId.toString()); |
| retValue = false; |
| } |
| |
| // Remove adjacency label from store |
| if (!pceStore.removeAdjLabel(link)) { |
| log.error("Unable to remove adjacency label id {} from store.", labelId.toString()); |
| retValue = false; |
| } |
| return retValue; |
| } |
| |
| /** |
| * Computes label stack for a path. |
| * |
| * @param path lsp path |
| * @return label stack |
| */ |
| public LabelStack computeLabelStack(Path path) { |
| checkNotNull(path, PATH_NULL); |
| // Label stack is linked list to make labels in order. |
| List<LabelResourceId> labelStack = new LinkedList<>(); |
| List<Link> linkList = path.links(); |
| if ((linkList != null) && (linkList.size() > 0)) { |
| // Path: [x] ---- [y] ---- [z] |
| // For other than last link, add only source[x] device label. |
| // For the last link, add both source[y] and destination[z] device labels. |
| // For all links add adjacency label |
| Link link = null; |
| LabelResourceId nodeLabelId = null; |
| LabelResourceId adjLabelId = null; |
| DeviceId deviceId = null; |
| for (Iterator<Link> iterator = linkList.iterator(); iterator.hasNext();) { |
| link = iterator.next(); |
| // Add source device label now |
| deviceId = link.src().deviceId(); |
| nodeLabelId = pceStore.getGlobalNodeLabel(deviceId); |
| if (nodeLabelId == null) { |
| log.error("Unable to find node label for a device id {} in store.", deviceId.toString()); |
| return null; |
| } |
| labelStack.add(nodeLabelId); |
| |
| // Add adjacency label for this link |
| adjLabelId = pceStore.getAdjLabel(link); |
| if (adjLabelId == null) { |
| log.error("Adjacency label id is null for a link {}.", link.toString()); |
| return null; |
| } |
| labelStack.add(adjLabelId); |
| } |
| |
| // This is the last link in path |
| // Add destination device label now. |
| if (link != null) { |
| deviceId = link.dst().deviceId(); |
| nodeLabelId = pceStore.getGlobalNodeLabel(deviceId); |
| if (nodeLabelId == null) { |
| log.error("Unable to find node label for a device id {} in store.", deviceId.toString()); |
| return null; |
| } |
| labelStack.add(nodeLabelId); |
| } |
| } else { |
| log.debug("Empty link in path."); |
| return null; |
| } |
| return new DefaultLabelStack(labelStack); |
| } |
| |
| /** |
| * Install a rule for pushing unique global labels to the device. |
| * @param deviceId device to which flow should be pushed |
| * @param labelId label for the device |
| * @param type type of operation |
| */ |
| private void installNodeLabelRule(DeviceId deviceId, LabelResourceId labelId, Objective.Operation type) { |
| checkNotNull(flowObjectiveService); |
| checkNotNull(appId); |
| TrafficSelector.Builder selectorBuilder = DefaultTrafficSelector.builder(); |
| |
| selectorBuilder.matchMplsLabel(MplsLabel.mplsLabel(labelId.id().intValue())); |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .build(); |
| |
| ForwardingObjective.Builder forwardingObjective = DefaultForwardingObjective.builder() |
| .withSelector(selectorBuilder.build()) |
| .withTreatment(treatment) |
| .withFlag(ForwardingObjective.Flag.VERSATILE) |
| .fromApp(appId) |
| .makePermanent(); |
| |
| if (type.equals(Objective.Operation.ADD)) { |
| |
| flowObjectiveService.forward(deviceId, forwardingObjective.add()); |
| } else { |
| flowObjectiveService.forward(deviceId, forwardingObjective.remove()); |
| } |
| } |
| |
| /** |
| * Install a rule for pushing node labels to the device of other nodes. |
| * @param deviceId device to which flow should be pushed |
| * @param labelId label for the device |
| * @param ipPrefix device for which label is pushed |
| * @param type type of operation |
| * @param bBos is this the end of sync push |
| */ |
| public void advertiseNodeLabelRule(DeviceId deviceId, LabelResourceId labelId, |
| IpPrefix ipPrefix, Objective.Operation type, boolean bBos) { |
| checkNotNull(flowObjectiveService); |
| checkNotNull(appId); |
| TrafficSelector.Builder selectorBuilder = DefaultTrafficSelector.builder(); |
| |
| selectorBuilder.matchMplsLabel(MplsLabel.mplsLabel(labelId.id().intValue())); |
| selectorBuilder.matchIPSrc(ipPrefix); |
| |
| if (bBos) { |
| selectorBuilder.matchMplsBos(bBos); |
| } |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .build(); |
| |
| ForwardingObjective.Builder forwardingObjective = DefaultForwardingObjective.builder() |
| .withSelector(selectorBuilder.build()) |
| .withTreatment(treatment) |
| .withFlag(ForwardingObjective.Flag.VERSATILE) |
| .fromApp(appId) |
| .makePermanent(); |
| |
| if (type.equals(Objective.Operation.ADD)) { |
| flowObjectiveService.forward(deviceId, forwardingObjective.add()); |
| } else { |
| flowObjectiveService.forward(deviceId, forwardingObjective.remove()); |
| } |
| } |
| |
| /** |
| * Install a rule for pushing Adjacency labels to the device. |
| * @param deviceId device to which flow should be pushed |
| * @param labelId label for the adjacency |
| * @param srcPortNum local port of the adjacency |
| * @param dstPortNum remote port of the adjacency |
| * @param type type of operation |
| */ |
| public void installAdjLabelRule(DeviceId deviceId, LabelResourceId labelId, |
| PortNumber srcPortNum, PortNumber dstPortNum, |
| Objective.Operation type) { |
| checkNotNull(flowObjectiveService); |
| checkNotNull(appId); |
| TrafficSelector.Builder selectorBuilder = DefaultTrafficSelector.builder(); |
| |
| selectorBuilder.matchMplsLabel(MplsLabel.mplsLabel(labelId.id().intValue())); |
| selectorBuilder.matchTcpSrc(TpPort.tpPort((int) srcPortNum.toLong())); |
| selectorBuilder.matchTcpDst(TpPort.tpPort((int) dstPortNum.toLong())); |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .build(); |
| |
| ForwardingObjective.Builder forwardingObjective = DefaultForwardingObjective.builder() |
| .withSelector(selectorBuilder.build()) |
| .withTreatment(treatment) |
| .withFlag(ForwardingObjective.Flag.VERSATILE) |
| .fromApp(appId) |
| .makePermanent(); |
| |
| if (type.equals(Objective.Operation.ADD)) { |
| flowObjectiveService.forward(deviceId, forwardingObjective.add()); |
| } else { |
| flowObjectiveService.forward(deviceId, forwardingObjective.remove()); |
| } |
| } |
| } |