DHCP Handling for TOR VM

[vpnservice.git] / dhcpservice / dhcpservice-impl / src / main / java / org / opendaylight / vpnservice / dhcpservice / DhcpUCastMacListener.java

diff --git a/dhcpservice/dhcpservice-impl/src/main/java/org/opendaylight/vpnservice/dhcpservice/DhcpUCastMacListener.java b/dhcpservice/dhcpservice-impl/src/main/java/org/opendaylight/vpnservice/dhcpservice/DhcpUCastMacListener.java
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+/*
+ * 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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