+/*
+ * Copyright (c) 2016 Ericsson India Global Services Pvt Ltd. and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.vpnservice.dhcpservice;
+
+import java.math.BigInteger;
+
+import org.opendaylight.controller.md.sal.binding.api.ClusteredDataChangeListener;
+import org.opendaylight.controller.md.sal.binding.api.DataBroker;
+import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
+import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker.DataChangeScope;
+import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
+import org.opendaylight.elanmanager.utils.ElanL2GwCacheUtils;
+import org.opendaylight.vpnservice.datastoreutils.AsyncClusteredDataChangeListenerBase;
+import org.opendaylight.vpnservice.mdsalutil.MDSALUtil;
+import org.opendaylight.vpnservice.neutronvpn.api.l2gw.L2GatewayDevice;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpAddress;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.HwvtepGlobalAugmentation;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.hwvtep.global.attributes.LocalUcastMacs;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.hwvtep.global.attributes.LogicalSwitches;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
+import org.opendaylight.yangtools.concepts.ListenerRegistration;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.common.base.Optional;
+
+public class DhcpUCastMacListener extends AsyncClusteredDataChangeListenerBase<LocalUcastMacs, DhcpUCastMacListener> implements AutoCloseable {
+
+ private static final Logger logger = LoggerFactory.getLogger(DhcpUCastMacListener.class);
+ private DataBroker broker;
+ private ListenerRegistration<DataChangeListener> listenerRegistration;
+ private DhcpExternalTunnelManager dhcpExternalTunnelManager;
+
+ public DhcpUCastMacListener(DhcpExternalTunnelManager dhcpManager, DataBroker dataBroker) {
+ super(LocalUcastMacs.class, DhcpUCastMacListener.class);
+ this.broker = dataBroker;
+ this.dhcpExternalTunnelManager = dhcpManager;
+ }
+
+ @Override
+ protected InstanceIdentifier<LocalUcastMacs> getWildCardPath() {
+ return InstanceIdentifier.create(NetworkTopology.class).child(Topology.class).child(Node.class)
+ .augmentation(HwvtepGlobalAugmentation.class).child(LocalUcastMacs.class);
+ }
+
+ @Override
+ public void close() throws Exception {
+ if (listenerRegistration != null) {
+ try {
+ listenerRegistration.close();
+ } catch (final Exception e) {
+ logger.error("Error when cleaning up DataChangeListener.", e);
+ }
+ listenerRegistration = null;
+ }
+ logger.info("DhcpUCastMacListener Closed");
+ }
+
+ @Override
+ protected void remove(InstanceIdentifier<LocalUcastMacs> identifier,
+ LocalUcastMacs del) {
+ // Flow removal for table 18 is handled in Neutron Port delete.
+ }
+
+ @Override
+ protected void update(InstanceIdentifier<LocalUcastMacs> identifier,
+ LocalUcastMacs original, LocalUcastMacs update) {
+ // TODO Auto-generated method stub
+
+ }
+
+ @Override
+ protected void add(InstanceIdentifier<LocalUcastMacs> identifier,
+ LocalUcastMacs add) {
+ NodeId torNodeId = identifier.firstKeyOf(Node.class).getNodeId();
+ InstanceIdentifier<LogicalSwitches> logicalSwitchRef = (InstanceIdentifier<LogicalSwitches>) add.getLogicalSwitchRef().getValue();
+ Optional<LogicalSwitches> logicalSwitchOptional = MDSALUtil.read(broker, LogicalDatastoreType.OPERATIONAL, logicalSwitchRef);
+ if ( !logicalSwitchOptional.isPresent() ) {
+ logger.error("Logical Switch ref doesn't have data {}", logicalSwitchRef);
+ return;
+ }
+ LogicalSwitches logicalSwitch = logicalSwitchOptional.get();
+ String elanInstanceName = logicalSwitch.getHwvtepNodeName().getValue();
+ L2GatewayDevice device = ElanL2GwCacheUtils.getL2GatewayDeviceFromCache(elanInstanceName, torNodeId.getValue());
+ if (device == null) {
+ logger.error("Logical Switch Device with name {} is not present in L2GWCONN cache", elanInstanceName);
+ return;
+ }
+ IpAddress tunnelIp = device.getTunnelIp();
+ BigInteger designatedDpnId = dhcpExternalTunnelManager.readDesignatedSwitchesForExternalTunnel(tunnelIp, elanInstanceName);
+ dhcpExternalTunnelManager.installDhcpFlowsForVms(tunnelIp, elanInstanceName, DhcpServiceUtils.getListOfDpns(broker), designatedDpnId, add.getMacEntryKey().getValue());
+ }
+
+ @Override
+ protected ClusteredDataChangeListener getDataChangeListener() {
+ return DhcpUCastMacListener.this;
+ }
+
+ @Override
+ protected DataChangeScope getDataChangeScope() {
+ return DataChangeScope.SUBTREE;
+ }
+}
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