/* * 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.netvirt.elan.internal; import com.google.common.base.Optional; import java.math.BigInteger; import java.util.Arrays; import org.opendaylight.controller.liblldp.NetUtils; import org.opendaylight.controller.md.sal.binding.api.WriteTransaction; import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType; import org.opendaylight.genius.interfacemanager.globals.InterfaceInfo; import org.opendaylight.genius.mdsalutil.MDSALUtil; import org.opendaylight.genius.mdsalutil.MetaDataUtil; import org.opendaylight.genius.mdsalutil.NWUtil; import org.opendaylight.genius.mdsalutil.NwConstants; import org.opendaylight.genius.mdsalutil.packet.Ethernet; import org.opendaylight.netvirt.elan.l2gw.utils.ElanL2GatewayUtils; import org.opendaylight.netvirt.elan.utils.ElanUtils; 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.genius.interfacemanager.meta.rev160406._if.indexes._interface.map.IfIndexInterface; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.instances.ElanInstance; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.tag.name.map.ElanTagName; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.forwarding.entries.MacEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.forwarding.entries.MacEntryBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.forwarding.entries.MacEntryKey; 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.yangtools.yang.binding.InstanceIdentifier; import org.slf4j.Logger; import org.slf4j.LoggerFactory; @SuppressWarnings("deprecation") public class ElanPacketInHandler implements PacketProcessingListener { private ElanServiceProvider elanServiceProvider = null; private static volatile ElanPacketInHandler elanPacketInHandler = null; private static final Logger logger = LoggerFactory.getLogger(ElanPacketInHandler.class); public ElanPacketInHandler(ElanServiceProvider elanServiceProvider) { this.elanServiceProvider = elanServiceProvider; } public static ElanPacketInHandler getElanPacketInHandler(ElanServiceProvider elanServiceProvider) { if (elanPacketInHandler == null) { synchronized (ElanPacketInHandler.class) { if (elanPacketInHandler == null) { ElanPacketInHandler elanPacketInHandler = new ElanPacketInHandler(elanServiceProvider); return elanPacketInHandler; } } } return elanPacketInHandler; } @Override public void onPacketReceived(PacketReceived notification) { Class pktInReason = notification.getPacketInReason(); short tableId = notification.getTableId().getValue(); if (pktInReason == NoMatch.class && tableId == NwConstants.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(); Optional interfaceInfoOp = ElanUtils.getInterfaceInfoByInterfaceTag(portTag); if (!interfaceInfoOp.isPresent()) { logger.warn("There is no interface for given portTag {}", portTag); return; } String interfaceName = interfaceInfoOp.get().getInterfaceName(); ElanTagName elanTagName = ElanUtils.getElanInfoByElanTag(elanTag); if (elanTagName == null) { logger.warn("not able to find elanTagName in elan-tag-name-map for elan tag {}", elanTag); return; } String elanName = elanTagName.getName(); 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 macEntryId = ElanUtils .getInterfaceMacEntriesIdentifierOperationalDataPath(interfaceName, physAddress); ElanUtils.delete(elanServiceProvider.getBroker(), 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 macEntryId = ElanUtils .getInterfaceMacEntriesIdentifierOperationalDataPath(interfaceName, physAddress); ElanUtils.delete(elanServiceProvider.getBroker(), 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 macEntryId = ElanUtils .getInterfaceMacEntriesIdentifierOperationalDataPath(interfaceName, physAddress); MDSALUtil.syncWrite(elanServiceProvider.getBroker(), LogicalDatastoreType.OPERATIONAL, macEntryId, macEntry); InstanceIdentifier elanMacEntryId = ElanUtils.getMacEntryOperationalDataPath(elanName, physAddress); MDSALUtil.syncWrite(elanServiceProvider.getBroker(), LogicalDatastoreType.OPERATIONAL, elanMacEntryId, macEntry); ElanInstance elanInstance = ElanUtils.getElanInstanceByName(elanName); WriteTransaction flowWritetx = elanServiceProvider.getBroker().newWriteOnlyTransaction(); ElanUtils.setupMacFlows(elanInstance, elanServiceProvider.getInterfaceManager().getInterfaceInfo(interfaceName), elanInstance.getMacTimeout(), macAddress, flowWritetx); flowWritetx.submit(); BigInteger dpId = elanServiceProvider.getInterfaceManager().getDpnForInterface(interfaceName); ElanL2GatewayUtils.scheduleAddDpnMacInExtDevices(elanInstance.getElanInstanceName(), dpId, Arrays.asList(physAddress)); } 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 = elanServiceProvider.getInterfaceManager() .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; } WriteTransaction flowDeletetx = elanServiceProvider.getBroker().newWriteOnlyTransaction(); ElanUtils.deleteMacFlows(elanInfo, oldInterfaceLport, macEntry, flowDeletetx); flowDeletetx.submit(); ElanL2GatewayUtils.removeMacsFromElanExternalDevices(elanInfo, Arrays.asList(macEntry.getMacAddress())); } }