--- /dev/null
+/*
+ * 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.elan.internal;
+
+import org.opendaylight.controller.md.sal.binding.api.DataBroker;
+import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
+import org.opendaylight.vpnservice.elan.utils.ElanConstants;
+import org.opendaylight.vpnservice.elan.utils.ElanUtils;
+//import org.opendaylight.vpnservice.interfacemgr.globals.InterfaceInfo;
+import org.opendaylight.vpnservice.interfacemgr.globals.InterfaceInfo;
+import org.opendaylight.vpnservice.interfacemgr.interfaces.IInterfaceManager;
+import org.opendaylight.vpnservice.mdsalutil.MDSALUtil;
+import org.opendaylight.vpnservice.mdsalutil.MetaDataUtil;
+import org.opendaylight.vpnservice.mdsalutil.NWUtil;
+import org.opendaylight.controller.liblldp.NetUtils;
+import org.opendaylight.vpnservice.mdsalutil.packet.Ethernet;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev100924.MacAddress;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.PhysAddress;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.NoMatch;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.PacketInReason;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.PacketProcessingListener;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.PacketReceived;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.elan.rev150602.elan.instances.ElanInstance;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.elan.rev150602.elan.state.Elan;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.elan.rev150602.elan.tag.name.map.ElanTagName;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.elan.rev150602.forwarding.entries.MacEntry;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.elan.rev150602.forwarding.entries.MacEntryBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.elan.rev150602.forwarding.entries.MacEntryKey;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.interfacemgr.meta.rev151007._if.indexes._interface.map.IfIndexInterface;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.math.BigInteger;
+
+public class ElanPacketInHandler implements PacketProcessingListener {
+
+ private final DataBroker broker;
+ private IInterfaceManager interfaceManager;
+
+ private static final Logger logger = LoggerFactory.getLogger(ElanPacketInHandler.class);
+
+ public ElanPacketInHandler(DataBroker dataBroker) {
+ broker = dataBroker;
+ }
+
+ public void setInterfaceManager(IInterfaceManager interfaceManager) {
+ this.interfaceManager = interfaceManager;
+ }
+
+ @Override
+ public void onPacketReceived(PacketReceived notification) {
+ Class<? extends PacketInReason> pktInReason = notification.getPacketInReason();
+ short tableId = notification.getTableId().getValue();
+ if(pktInReason == NoMatch.class && tableId == ElanConstants.ELAN_SMAC_TABLE) {
+ try {
+ byte[] data = notification.getPayload();
+ Ethernet res = new Ethernet();
+
+ res.deserialize(data, 0, data.length * NetUtils.NumBitsInAByte);
+
+ byte[] srcMac = res.getSourceMACAddress();
+ String macAddress = NWUtil.toStringMacAddress(srcMac);
+ PhysAddress physAddress = new PhysAddress(macAddress);
+ BigInteger metadata = notification.getMatch().getMetadata().getMetadata();
+ long elanTag = MetaDataUtil.getElanTagFromMetadata(metadata);
+
+ long portTag = MetaDataUtil.getLportFromMetadata(metadata).intValue();
+
+ IfIndexInterface interfaceInfo = ElanUtils.getInterfaceInfoByInterfaceTag(portTag);
+ if (interfaceInfo == null) {
+ logger.warn("There is no interface for given portTag {}", portTag);
+ return;
+ }
+ String interfaceName = interfaceInfo.getInterfaceName();
+ ElanTagName elanTagName = ElanUtils.getElanInfoByElanTag(elanTag);
+ String elanName = elanTagName.getName();
+ Elan elanInfo = ElanUtils.getElanByName(elanName);
+ MacEntry macEntry = ElanUtils.getInterfaceMacEntriesOperationalDataPath(interfaceName, physAddress);
+ if(macEntry != null && macEntry.getInterface() == interfaceName) {
+ BigInteger macTimeStamp = macEntry.getControllerLearnedForwardingEntryTimestamp();
+ if (System.currentTimeMillis() > macTimeStamp.longValue()+2000) {
+ /*
+ * Protection time expired. Even though the MAC has been learnt (it is in the cache)
+ * the packets are punted to controller. Which means, the the flows were not successfully
+ * created in the DPN, but the MAC entry has been added successfully in the cache.
+ *
+ * So, the cache has to be cleared and the flows and cache should be recreated (clearing
+ * of cache is required so that the timestamp is updated).
+ */
+ InstanceIdentifier<MacEntry> macEntryId = ElanUtils.getInterfaceMacEntriesIdentifierOperationalDataPath(interfaceName, physAddress);
+ ElanUtils.delete(broker, LogicalDatastoreType.OPERATIONAL, macEntryId);
+ } else {
+ // Protection time running. Ignore packets for 2 seconds
+ return;
+ }
+ } else if(macEntry != null) {
+ // MAC address has moved. Overwrite the mapping and replace MAC flows
+ long macTimeStamp = macEntry.getControllerLearnedForwardingEntryTimestamp().longValue();
+ if (System.currentTimeMillis() > macTimeStamp+1000) {
+
+ InstanceIdentifier<MacEntry> macEntryId = ElanUtils.getInterfaceMacEntriesIdentifierOperationalDataPath(interfaceName, physAddress);
+ ElanUtils.delete(broker, LogicalDatastoreType.OPERATIONAL, macEntryId);
+ tryAndRemoveInvalidMacEntry(elanName, macEntry);
+ } else {
+ // New FEs flood their packets on all interfaces. This can lead
+ // to many contradicting packet_ins. Ignore all packets received
+ // within 1s after the first packet_in
+ return;
+ }
+ }
+ BigInteger timeStamp = new BigInteger(String.valueOf((long)System.currentTimeMillis()));
+ macEntry = new MacEntryBuilder().setInterface(interfaceName).setMacAddress(physAddress).setKey(new MacEntryKey(physAddress)).setControllerLearnedForwardingEntryTimestamp(timeStamp).setIsStaticAddress(false).build();
+ InstanceIdentifier<MacEntry> macEntryId = ElanUtils.getInterfaceMacEntriesIdentifierOperationalDataPath(interfaceName, physAddress);
+ MDSALUtil.syncWrite(broker, LogicalDatastoreType.OPERATIONAL, macEntryId, macEntry);
+ InstanceIdentifier<MacEntry> elanMacEntryId = ElanUtils.getMacEntryOperationalDataPath(elanName, physAddress);
+ MDSALUtil.syncWrite(broker, LogicalDatastoreType.OPERATIONAL, elanMacEntryId, macEntry);
+ ElanInstance elanInstance = ElanUtils.getElanInstanceByName(elanName);
+ ElanUtils.setupMacFlows(elanInstance, interfaceManager.getInterfaceInfo(interfaceName), elanInstance.getMacTimeout(), macAddress);
+ } catch (Exception e) {
+ logger.trace("Failed to decode packet: {}", e);
+ }
+ }
+
+ }
+
+
+ /*
+ * Though this method is a little costlier because it uses try-catch construct, it is used
+ * only in rare scenarios like MAC movement or invalid Static MAC having been added on a
+ * wrong ELAN.
+ */
+ private void tryAndRemoveInvalidMacEntry(String elanName, MacEntry macEntry) {
+ ElanInstance elanInfo = ElanUtils.getElanInstanceByName(elanName);
+ if (elanInfo == null) {
+ logger.warn(String.format("MAC %s is been added (either statically or dynamically) for an invalid Elan %s. "
+ + "Manual cleanup may be necessary", macEntry.getMacAddress(), elanName));
+ return;
+ }
+
+ InterfaceInfo oldInterfaceLport = interfaceManager.getInterfaceInfo(macEntry.getInterface());
+ if (oldInterfaceLport == null) {
+ logger.warn(String.format("MAC %s is been added (either statically or dynamically) on an invalid Logical Port %s. "
+ + "Manual cleanup may be necessary", macEntry.getMacAddress(), macEntry.getInterface()));
+ return;
+ }
+ ElanUtils.deleteMacFlows(elanInfo, oldInterfaceLport, macEntry);
+ }
+
+}
Code Review / vpnservice.git / blobdiff