renderers/ofoverlay/src/main/java/org/opendaylight/groupbasedpolicy/renderer/ofoverlay/flow/DestinationMapper.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow;
  10
  11 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.ARP;
  12 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.IPv4;
  13 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.IPv6;
  14 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.addNxRegMatch;
  15 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.applyActionIns;
  16 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.createNodePath;
  17 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.decNwTtlAction;
  18 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.ethernetMatch;
  19 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.getOfPortNum;
  20 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.gotoTableIns;
  21 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.groupAction;
  22 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.instructions;
  23 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.nxLoadArpOpAction;
  24 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.nxLoadArpShaAction;
  25 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.nxLoadArpSpaAction;
  26 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.nxLoadRegAction;
  27 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.nxLoadTunIPv4Action;
  28 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.nxLoadTunIdAction;
  29 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.nxMoveArpShaToArpThaAction;
  30 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.nxMoveArpSpaToArpTpaAction;
  31 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.nxMoveEthSrcToEthDstAction;
  32 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.outputAction;
  33 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.setDlDstAction;
  34 import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.setDlSrcAction;
  35
  36 import java.math.BigInteger;
  37 import java.util.ArrayList;
  38 import java.util.Collection;
  39 import java.util.Collections;
  40 import java.util.HashMap;
  41 import java.util.HashSet;
  42 import java.util.List;
  43 import java.util.Map;
  44 import java.util.Map.Entry;
  45 import java.util.Objects;
  46 import java.util.Set;
  47
  48 import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
  49 import org.opendaylight.controller.md.sal.binding.api.ReadTransaction;
  50 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  51 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  52 import org.opendaylight.groupbasedpolicy.endpoint.EpKey;
  53 import org.opendaylight.groupbasedpolicy.renderer.ofoverlay.OfContext;
  54 import org.opendaylight.groupbasedpolicy.renderer.ofoverlay.PolicyManager.FlowMap;
  55 import org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.RegMatch;
  56 import org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.OrdinalFactory.EndpointFwdCtxOrdinals;
  57 import org.opendaylight.groupbasedpolicy.resolver.EgKey;
  58 import org.opendaylight.groupbasedpolicy.resolver.PolicyInfo;
  59 import org.opendaylight.groupbasedpolicy.resolver.TenantUtils;
  60 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpAddress;
  61 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Prefix;
  62 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv6Prefix;
  63 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev100924.MacAddress;
  64 import org.opendaylight.yang.gen.v1.urn.opendaylight.action.types.rev131112.action.Action;
  65 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
  66 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowId;
  67 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.Flow;
  68 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.FlowBuilder;
  69 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.flow.InstructionsBuilder;
  70 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.flow.MatchBuilder;
  71 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.list.Instruction;
  72 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.list.InstructionBuilder;
  73 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.groups.Group;
  74 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.EndpointGroupId;
  75 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.NetworkDomainId;
  76 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.TenantId;
  77 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.Endpoints;
  78 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.endpoint.fields.L3Address;
  79 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.endpoints.Endpoint;
  80 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.endpoints.EndpointL3;
  81 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.endpoints.EndpointL3Key;
  82 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.ofoverlay.rev140528.EndpointLocation.LocationType;
  83 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.ofoverlay.rev140528.OfOverlayContext;
  84 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.tenants.Tenant;
  85 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.tenants.tenant.L3Context;
  86 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.tenants.tenant.Subnet;
  87 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeConnectorId;
  88 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
  89 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
  90 import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.ethernet.match.fields.EthernetDestinationBuilder;
  91 import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.match.EthernetMatchBuilder;
  92 import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.match.Layer3Match;
  93 import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.match.layer._3.match.ArpMatchBuilder;
  94 import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.match.layer._3.match.Ipv4MatchBuilder;
  95 import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.match.layer._3.match.Ipv6MatchBuilder;
  96 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.NxmNxReg2;
  97 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.NxmNxReg3;
  98 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.NxmNxReg4;
  99 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.NxmNxReg5;
 100 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.NxmNxReg6;
 101 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.NxmNxReg7;
 102 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.overlay.rev150105.TunnelTypeVxlan;
 103 import org.opendaylight.yangtools.yang.binding.DataObject;
 104 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
 105 import org.slf4j.Logger;
 106 import org.slf4j.LoggerFactory;
 107
 108 import com.google.common.base.Optional;
 109 import com.google.common.collect.HashMultimap;
 110 import com.google.common.collect.SetMultimap;
 111 import com.google.common.collect.Sets;
 112 import com.google.common.util.concurrent.CheckedFuture;
 113
 114 /**
 115  * Manage the table that maps the destination address to the next hop for the
 116  * path as well as applies any relevant routing transformations.
 117  */
 118 public class DestinationMapper extends FlowTable {
 119
 120     protected static final Logger LOG = LoggerFactory.getLogger(DestinationMapper.class);
 121
 122     // TODO Li alagalah: Improve UT coverage for this class.
 123
 124     // TODO Li alagalah: Use EndpointL3 for L3 flows, Endpoint for L2 flows
 125     // This ensures we have the appropriate network-containment'
 126
 127     public static final short TABLE_ID = 2;
 128     /**
 129      * This is the MAC address of the magical router in the sky
 130      */
 131     public static final MacAddress ROUTER_MAC = new MacAddress("88:f0:31:b5:12:b5");
 132     public static final MacAddress MULTICAST_MAC = new MacAddress("01:00:00:00:00:00");
 133
 134     public DestinationMapper(OfContext ctx) {
 135         super(ctx);
 136     }
 137
 138     Map<TenantId, HashSet<Subnet>> subnetsByTenant = new HashMap<TenantId, HashSet<Subnet>>();
 139
 140     @Override
 141     public short getTableId() {
 142         return TABLE_ID;
 143     }
 144
 145     @Override
 146     public void sync(NodeId nodeId, PolicyInfo policyInfo, FlowMap flowMap) throws Exception {
 147
 148         TenantId currentTenant;
 149
 150         flowMap.writeFlow(nodeId, TABLE_ID, dropFlow(Integer.valueOf(1), null));
 151
 152         SetMultimap<EpKey, EpKey> visitedEps = HashMultimap.create();
 153         Set<EndpointFwdCtxOrdinals> epOrdSet = new HashSet<>();
 154
 155         for (Endpoint srcEp : ctx.getEndpointManager().getEndpointsForNode(nodeId)) {
 156             Set<EndpointGroupId> srcEpgIds = new HashSet<>();
 157             if (srcEp.getEndpointGroup() != null)
 158                 srcEpgIds.add(srcEp.getEndpointGroup());
 159             if (srcEp.getEndpointGroups() != null)
 160                 srcEpgIds.addAll(srcEp.getEndpointGroups());
 161
 162             for (EndpointGroupId epgId : srcEpgIds) {
 163                 EgKey epg = new EgKey(srcEp.getTenant(), epgId);
 164                 Set<EgKey> peers = Sets.union(Collections.singleton(epg), policyInfo.getPeers(epg));
 165                 for (EgKey peer : peers) {
 166                     for (Endpoint peerEp : ctx.getEndpointManager().getEndpointsForGroup(peer)) {
 167                         currentTenant = peerEp.getTenant();
 168                         subnetsByTenant.put(currentTenant, getSubnets(currentTenant));
 169                         EpKey srcEpKey = new EpKey(srcEp.getL2Context(), srcEp.getMacAddress());
 170                         EpKey peerEpKey = new EpKey(peerEp.getL2Context(), peerEp.getMacAddress());
 171
 172                         if (visitedEps.get(srcEpKey) != null && visitedEps.get(srcEpKey).contains(peerEpKey)) {
 173                             continue;
 174                         }
 175                         syncEP(flowMap, nodeId, policyInfo, srcEp, peerEp);
 176                         visitedEps.put(srcEpKey, peerEpKey);
 177
 178                         // Process subnets and flood-domains for epPeer
 179                         EndpointFwdCtxOrdinals epOrds = OrdinalFactory.getEndpointFwdCtxOrdinals(ctx, policyInfo,
 180                                 peerEp);
 181                         epOrdSet.add(epOrds);
 182                     }
 183                 }
 184             }
 185         }
 186
 187         for (Entry<TenantId, HashSet<Subnet>> subnetEntry : subnetsByTenant.entrySet()) {
 188             if (subnetEntry.getValue() == null) {
 189                 LOG.trace("Tenant: {} has empty subnet entry.", subnetEntry.getKey());
 190                 continue;
 191             }
 192             currentTenant = subnetEntry.getKey();
 193             for (Subnet sn : subnetEntry.getValue()) {
 194                 L3Context l3c = getL3ContextForSubnet(currentTenant, sn);
 195                 Flow arpFlow = createRouterArpFlow(currentTenant, nodeId, sn,
 196                         OrdinalFactory.getContextOrdinal(currentTenant, l3c.getId()));
 197                 if (arpFlow != null) {
 198                     flowMap.writeFlow(nodeId, TABLE_ID, arpFlow);
 199                 } else {
 200                     LOG.debug(
 201                             "Gateway ARP flow is not created, because virtual router IP has not been set for subnet {} .",
 202                             sn.getIpPrefix().getValue());
 203                 }
 204             }
 205         }
 206
 207         // Write broadcast flows per flood domain.
 208         for (EndpointFwdCtxOrdinals epOrd : epOrdSet) {
 209             if (groupExists(nodeId, epOrd.getFdId())) {
 210                 flowMap.writeFlow(nodeId, TABLE_ID, createBroadcastFlow(epOrd));
 211             }
 212         }
 213     }
 214
 215     // set up next-hop destinations for all the endpoints in the endpoint
 216     // group on the node
 217
 218     private Flow createBroadcastFlow(EndpointFwdCtxOrdinals epOrd) {
 219         FlowId flowId = new FlowId(new StringBuilder().
 220                                     append("broadcast|").
 221                                     append(epOrd.getFdId()).
 222                                     toString());
 223         MatchBuilder mb = new MatchBuilder()
 224                             .setEthernetMatch(new EthernetMatchBuilder()
 225                             .setEthernetDestination(new EthernetDestinationBuilder().
 226                                                         setAddress(MULTICAST_MAC)
 227                                                         .setMask(MULTICAST_MAC).build())
 228                             .build());
 229         addNxRegMatch(mb, RegMatch.of(NxmNxReg5.class, Long.valueOf(epOrd.getFdId())));
 230
 231         FlowBuilder flowb = base().setPriority(Integer.valueOf(140))
 232             .setId(flowId)
 233             .setMatch(mb.build())
 234             .setInstructions(
 235                     instructions(applyActionIns(nxLoadTunIdAction(BigInteger.valueOf(epOrd.getFdId()), false),
 236                             groupAction(Long.valueOf(epOrd.getFdId())))));
 237         return flowb.build();
 238     }
 239
 240     private boolean groupExists(NodeId nodeId, Integer fdId) throws Exception {
 241         // Fetch existing GroupTables
 242         if (ctx.getDataBroker() == null) {
 243             return false;
 244         }
 245
 246         ReadOnlyTransaction t = ctx.getDataBroker().newReadOnlyTransaction();
 247         InstanceIdentifier<Node> niid = createNodePath(nodeId);
 248         Optional<Node> r = t.read(LogicalDatastoreType.CONFIGURATION, niid).get();
 249         if (!r.isPresent())
 250             return false;
 251         FlowCapableNode fcn = r.get().getAugmentation(FlowCapableNode.class);
 252         if (fcn == null)
 253             return false;
 254
 255         if (fcn.getGroup() != null) {
 256             for (Group g : fcn.getGroup()) {
 257                 if (g.getGroupId().getValue().equals(Long.valueOf(fdId))) { // Group
 258                                                                             // Exists.
 259                     return true;
 260                 }
 261             }
 262         }
 263         return false;
 264     }
 265
 266     private MacAddress routerPortMac(L3Context l3c, IpAddress ipAddress) {
 267
 268         if (ctx.getDataBroker() == null) {
 269             return null;
 270         }
 271
 272         MacAddress defaultMacAddress = ROUTER_MAC;
 273
 274         EndpointL3Key l3Key = new EndpointL3Key(ipAddress, l3c.getId());
 275         InstanceIdentifier<EndpointL3> endpointsIid = InstanceIdentifier.builder(Endpoints.class)
 276             .child(EndpointL3.class, l3Key)
 277             .build();
 278         ReadOnlyTransaction t = ctx.getDataBroker().newReadOnlyTransaction();
 279
 280         Optional<EndpointL3> r;
 281         try {
 282             r = t.read(LogicalDatastoreType.OPERATIONAL, endpointsIid).get();
 283             if (!r.isPresent())
 284                 return defaultMacAddress;
 285             EndpointL3 epL3 = r.get();
 286             if (epL3.getMacAddress() == null) {
 287                 return defaultMacAddress;
 288             } else {
 289                 return epL3.getMacAddress();
 290             }
 291         } catch (Exception e) {
 292             LOG.error("Error reading EndpointL3 {}.{}", l3c, ipAddress, e);
 293             return null;
 294         }
 295     }
 296
 297     private L3Context getL3ContextForSubnet(TenantId tenantId, Subnet sn) {
 298         L3Context l3c = ctx.getPolicyResolver().getTenant(tenantId).resolveL3Context(sn.getId());
 299         return l3c;
 300     }
 301
 302     private Flow createRouterArpFlow(TenantId tenantId, NodeId nodeId, Subnet sn, int l3Id) {
 303         if (sn == null || sn.getVirtualRouterIp() == null) {
 304             LOG.trace("Didn't create routerArpFlow since either subnet or subnet virtual router was null");
 305             return null;
 306         }
 307         /*
 308          * TODO: Li alagalah: This should be new Yang "gateways" list as well,
 309          * that expresses the gateway and prefixes it is interface for. Should
 310          * also check for external.
 311          */
 312         if (sn.getVirtualRouterIp().getIpv4Address() != null) {
 313             String ikey = sn.getVirtualRouterIp().getIpv4Address().getValue();
 314
 315             L3Context l3c = getL3ContextForSubnet(tenantId, sn);
 316             if (l3c == null) {
 317                 LOG.error("No L3 Context found associated with subnet {}", sn.getId());
 318             }
 319
 320             MacAddress routerMac = routerPortMac(l3c, sn.getVirtualRouterIp());
 321             if (routerMac == null) {
 322                 return null;
 323             }
 324
 325             BigInteger intRouterMac = new BigInteger(1, bytesFromHexString(routerMac.getValue()));
 326
 327             FlowId flowId = new FlowId(new StringBuffer().append("routerarp|")
 328                 .append(sn.getId().getValue())
 329                 .append("|")
 330                 .append(ikey)
 331                 .append("|")
 332                 .append(l3Id)
 333                 .toString());
 334             MatchBuilder mb = new MatchBuilder().setEthernetMatch(ethernetMatch(null, null, ARP)).setLayer3Match(
 335                     new ArpMatchBuilder().setArpOp(Integer.valueOf(1))
 336                         .setArpTargetTransportAddress(new Ipv4Prefix(ikey + "/32"))
 337                         .build());
 338             addNxRegMatch(mb, RegMatch.of(NxmNxReg6.class, Long.valueOf(l3Id)));
 339
 340             FlowBuilder flowb = base().setPriority(150)
 341                 .setId(flowId)
 342                 .setMatch(mb.build())
 343                 .setInstructions(
 344                         instructions(applyActionIns(nxMoveEthSrcToEthDstAction(), setDlSrcAction(routerMac),
 345                                 nxLoadArpOpAction(BigInteger.valueOf(2L)), nxMoveArpShaToArpThaAction(),
 346                                 nxLoadArpShaAction(intRouterMac), nxMoveArpSpaToArpTpaAction(),
 347                                 nxLoadArpSpaAction(ikey), outputAction(new NodeConnectorId(nodeId.getValue()
 348                                         + ":INPORT")))));
 349             return flowb.build();
 350         } else {
 351             LOG.warn("IPv6 virtual router {} for subnet {} not supported", sn.getVirtualRouterIp(), sn.getId()
 352                 .getValue());
 353             return null;
 354         }
 355
 356     }
 357
 358     private Flow createLocalL2Flow(Endpoint ep, EndpointFwdCtxOrdinals epFwdCtxOrds, OfOverlayContext ofc) {
 359
 360         // TODO Li alagalah - refactor common code but keep simple method
 361         ArrayList<Instruction> instructions = new ArrayList<>();
 362         List<Action> applyActions = new ArrayList<>();
 363
 364         int order = 0;
 365
 366         Action setdEPG = nxLoadRegAction(NxmNxReg2.class, BigInteger.valueOf(epFwdCtxOrds.getEpgId()));
 367         Action setdCG = nxLoadRegAction(NxmNxReg3.class, BigInteger.valueOf(epFwdCtxOrds.getCgId()));
 368         Action setNextHop;
 369         String nextHop;
 370
 371         // BEGIN L2 LOCAL
 372         nextHop = ofc.getNodeConnectorId().getValue();
 373
 374         long portNum;
 375         try {
 376             portNum = getOfPortNum(ofc.getNodeConnectorId());
 377         } catch (NumberFormatException ex) {
 378             LOG.warn("Could not parse port number {}", ofc.getNodeConnectorId(), ex);
 379             return null;
 380         }
 381
 382         setNextHop = nxLoadRegAction(NxmNxReg7.class, BigInteger.valueOf(portNum));
 383
 384         // END L2 LOCAL
 385
 386         order += 1;
 387         applyActions.add(setdEPG);
 388         applyActions.add(setdCG);
 389         applyActions.add(setNextHop);
 390         Instruction applyActionsIns = new InstructionBuilder().setOrder(order++)
 391             .setInstruction(applyActionIns(applyActions.toArray(new Action[applyActions.size()])))
 392             .build();
 393         instructions.add(applyActionsIns);
 394
 395         Instruction gotoTable = new InstructionBuilder().setOrder(order++)
 396             .setInstruction(gotoTableIns((short) (getTableId() + 1)))
 397             .build();
 398         instructions.add(gotoTable);
 399
 400         FlowId flowid = new FlowId(new StringBuilder().append(epFwdCtxOrds.getBdId())
 401             .append("|l2|")
 402             .append(ep.getMacAddress().getValue())
 403             .append("|")
 404             .append(nextHop)
 405             .toString());
 406         MatchBuilder mb = new MatchBuilder().setEthernetMatch(ethernetMatch(null, ep.getMacAddress(), null));
 407         addNxRegMatch(mb, RegMatch.of(NxmNxReg4.class, Long.valueOf(epFwdCtxOrds.getBdId())));
 408         FlowBuilder flowb = base().setId(flowid)
 409             .setPriority(Integer.valueOf(50))
 410             .setMatch(mb.build())
 411             .setInstructions(new InstructionsBuilder().setInstruction(instructions).build());
 412         return flowb.build();
 413     }
 414
 415     private void syncEP(FlowMap flowMap, NodeId nodeId, PolicyInfo policyInfo, Endpoint srcEp, Endpoint destEp)
 416             throws Exception {
 417
 418         // TODO: Conditions messed up, but for now, send policyInfo until this
 419         // is fixed.
 420         EndpointFwdCtxOrdinals destEpFwdCtxOrds = OrdinalFactory.getEndpointFwdCtxOrdinals(ctx, policyInfo, destEp);
 421         EndpointFwdCtxOrdinals srcEpFwdCtxOrds = OrdinalFactory.getEndpointFwdCtxOrdinals(ctx, policyInfo, srcEp);
 422
 423         if (destEp.getTenant() == null || (destEp.getEndpointGroup() == null && destEp.getEndpointGroups() == null)) {
 424             LOG.trace("Didn't process endpoint due to either tenant, or EPG(s) being null", destEp.getKey());
 425             return;
 426         }
 427         OfOverlayContext ofc = destEp.getAugmentation(OfOverlayContext.class);
 428
 429         // ////////////////////////////////////////////////////////////////////////////////////////
 430         /*
 431          * NOT HANDLING EXTERNALS TODO: alagalah Li: External Gateway
 432          * functionality needed here.
 433          */
 434         if (LocationType.External.equals(ofc.getLocationType())) {
 435             // XXX - TODO - perform NAT and send to the external network
 436             // TODO: Use case neutron gateway interface
 437             LOG.warn("External endpoints not yet supported");
 438             return;
 439         }
 440
 441         /*
 442          * Only care about subnets for L3, but fetch them before loop. We need
 443          * the local subnets for setting SRC MAC for routing. All Routing is now
 444          * done locally! YAY! Instead of being shovelled L2 style across network
 445          * ala Helium.
 446          */
 447         List<Subnet> localSubnets = getLocalSubnets(nodeId);
 448         if (localSubnets == null) {
 449             LOG.error("No subnets could be found locally for node: {}", nodeId);
 450             return;
 451         }
 452
 453         if (Objects.equals(ofc.getNodeId(), nodeId)) {
 454             // this is a local endpoint; send to the approppriate local
 455             // port
 456
 457             if (srcEpFwdCtxOrds.getBdId() == destEpFwdCtxOrds.getBdId()) {
 458                 flowMap.writeFlow(nodeId, TABLE_ID, createLocalL2Flow(destEp, destEpFwdCtxOrds, ofc));
 459             }
 460             // TODO Li alagalah: Need to move to EndpointL3 for L3 processing.
 461             // The Endpoint conflation must end!
 462             if (destEp.getL3Address() == null) {
 463                 LOG.trace("Endpoint {} didn't have L3 Address so was not processed for L3 flows.", destEp.getKey());
 464                 return;
 465             }
 466
 467             for (L3Address l3a : destEp.getL3Address()) {
 468                 if (l3a.getIpAddress() == null || l3a.getL3Context() == null) {
 469                     LOG.error("Endpoint with L3Address but either IPAddress or L3Context is null. {}",
 470                             destEp.getL3Address());
 471                     continue;
 472                 } else {
 473                     for (Subnet localSubnet : localSubnets) {
 474                         Flow flow = createLocalL3RoutedFlow(destEp, l3a, destEpFwdCtxOrds, ofc, localSubnet);
 475                         if (flow != null) {
 476                             flowMap.writeFlow(nodeId, TABLE_ID, flow);
 477                         } else {
 478                             LOG.trace("Did not write remote L3 flow for endpoint {} and subnet {}", l3a.getIpAddress(),
 479                                     localSubnet.getIpPrefix().getValue());
 480                         }
 481                     }
 482                 }
 483             }
 484         } else {
 485             // this endpoint is on a different switch; send to the
 486             // appropriate tunnel
 487             if (srcEpFwdCtxOrds.getBdId() == destEpFwdCtxOrds.getBdId()) {
 488                 Flow remoteL2Flow = createRemoteL2Flow(destEp, nodeId, srcEpFwdCtxOrds, destEpFwdCtxOrds, ofc);
 489                 if (remoteL2Flow != null) {
 490                     flowMap.writeFlow(nodeId, TABLE_ID, remoteL2Flow);
 491                 }
 492             } else {
 493                 LOG.trace("DestinationMapper: RemoteL2Flow: not created, in different BDs src: {} dst: {}",
 494                         srcEpFwdCtxOrds.getBdId(), destEpFwdCtxOrds.getBdId());
 495             }
 496
 497             // TODO Li alagalah: Need to move to EndpointL3 for L3 processing.
 498             // The Endpoint conflation must end!
 499             if (destEp.getL3Address() == null) {
 500                 LOG.trace("Endpoint {} didn't have L3 Address so was not processed for L3 flows.", destEp.getKey());
 501                 return;
 502             }
 503             for (L3Address l3a : destEp.getL3Address()) {
 504                 if (l3a.getIpAddress() == null || l3a.getL3Context() == null) {
 505                     LOG.error("Endpoint with L3Address but either IPAddress or L3Context is null. {}",
 506                             destEp.getL3Address());
 507                     continue;
 508                 } else {
 509                     for (Subnet localSubnet : localSubnets) {
 510                         Flow remoteL3Flow = createRemoteL3RoutedFlow(destEp, l3a, nodeId, srcEpFwdCtxOrds,
 511                                 destEpFwdCtxOrds, ofc, localSubnet);
 512                         if (remoteL3Flow != null) {
 513                             flowMap.writeFlow(nodeId, TABLE_ID, remoteL3Flow);
 514                         } else {
 515                             LOG.trace("Did not write remote L3 flow for endpoint {} and subnet {}", l3a.getIpAddress(),
 516                                     localSubnet.getIpPrefix().getValue());
 517                         }
 518                     }
 519                 }
 520             }
 521         } // remote (tunnel)
 522
 523         // }
 524
 525     }
 526
 527     /*
 528      * ################################## DestMapper Flow methods
 529      * ##################################
 530      */
 531     private Flow createLocalL3RoutedFlow(Endpoint destEp, L3Address destL3Address, EndpointFwdCtxOrdinals epFwdCtxOrds,
 532             OfOverlayContext ofc, Subnet srcSubnet) {
 533
 534         // TODO Li alagalah - refactor common code but keep simple method
 535
 536         Subnet destSubnet = null;
 537         HashSet<Subnet> subnets = getSubnets(destEp.getTenant());
 538         if (subnets == null) {
 539             LOG.trace("No subnets in tenant {}", destL3Address.getIpAddress());
 540             return null;
 541         }
 542         NetworkDomainId epNetworkContainment = getEPNetworkContainment(destEp);
 543         for (Subnet subnet : subnets) {
 544             // TODO Li alagalah add IPv6 support
 545             if (subnet.getId().getValue().equals(epNetworkContainment.getValue())) {
 546                 destSubnet = subnet;
 547                 break;
 548             }
 549         }
 550         if (destSubnet == null) {
 551             LOG.trace("Destination IP address does not match any subnet in tenant {}", destL3Address.getIpAddress());
 552             return null;
 553         }
 554
 555         if (destSubnet.getVirtualRouterIp() == null) {
 556             LOG.trace("Destination subnet {} for Endpoint {}.{} has no gateway IP", destSubnet.getIpPrefix(),
 557                     destL3Address.getKey());
 558             return null;
 559         }
 560
 561         if (srcSubnet.getVirtualRouterIp() == null) {
 562             LOG.trace("Local subnet {} has no gateway IP", srcSubnet.getIpPrefix());
 563             return null;
 564         }
 565         L3Context destL3c = getL3ContextForSubnet(destEp.getTenant(), destSubnet);
 566         if (destL3c == null || destL3c.getId() == null) {
 567             LOG.error("No L3 Context found associated with subnet {}", destSubnet.getId());
 568             return null;
 569         }
 570         L3Context srcL3c = getL3ContextForSubnet(destEp.getTenant(), srcSubnet);
 571         if (srcL3c == null || srcL3c.getId() == null) {
 572             LOG.error("No L3 Context found associated with subnet {}", srcSubnet.getId());
 573             return null;
 574         }
 575
 576         if (!(srcL3c.getId().getValue().equals(destL3c.getId().getValue()))) {
 577             LOG.trace("Trying to route between two L3Contexts {} and {}. Not currently supported.", srcL3c.getId()
 578                 .getValue(), destL3c.getId().getValue());
 579             return null;
 580         }
 581
 582         MacAddress matcherMac = routerPortMac(destL3c, srcSubnet.getVirtualRouterIp());
 583         MacAddress epDestMac = destEp.getMacAddress();
 584         MacAddress destSubnetGatewayMac = routerPortMac(destL3c, destSubnet.getVirtualRouterIp());
 585
 586         if (srcSubnet.getId().getValue().equals(destSubnet.getId().getValue())) {
 587             // This is our final destination, so match on actual EP mac.
 588             matcherMac = epDestMac;
 589         }
 590
 591         ArrayList<Instruction> l3instructions = new ArrayList<>();
 592         List<Action> applyActions = new ArrayList<>();
 593         List<Action> l3ApplyActions = new ArrayList<>();
 594
 595         int order = 0;
 596
 597         Action setdEPG = nxLoadRegAction(NxmNxReg2.class, BigInteger.valueOf(epFwdCtxOrds.getEpgId()));
 598         Action setdCG = nxLoadRegAction(NxmNxReg3.class, BigInteger.valueOf(epFwdCtxOrds.getCgId()));
 599         Action setNextHop;
 600         String nextHop;
 601
 602         // BEGIN L3 LOCAL
 603         nextHop = ofc.getNodeConnectorId().getValue();
 604
 605         long portNum;
 606         try {
 607             portNum = getOfPortNum(ofc.getNodeConnectorId());
 608         } catch (NumberFormatException ex) {
 609             LOG.warn("Could not parse port number {}", ofc.getNodeConnectorId(), ex);
 610             return null;
 611         }
 612
 613         setNextHop = nxLoadRegAction(NxmNxReg7.class, BigInteger.valueOf(portNum));
 614         // END L3 LOCAL
 615
 616         // Lets not re-write the srcMac if its local.
 617         if (!(matcherMac.getValue().equals(epDestMac.getValue()))) {
 618             Action setDlSrc = setDlSrcAction(destSubnetGatewayMac);
 619             l3ApplyActions.add(setDlSrc);
 620         }
 621
 622         Action setDlDst = setDlDstAction(epDestMac);
 623         l3ApplyActions.add(setDlDst);
 624
 625         Action decTtl = decNwTtlAction();
 626         l3ApplyActions.add(decTtl);
 627
 628         order += 1;
 629         applyActions.add(setdEPG);
 630         applyActions.add(setdCG);
 631         applyActions.add(setNextHop);
 632
 633         applyActions.addAll(l3ApplyActions);
 634         Instruction applyActionsIns = new InstructionBuilder().setOrder(order++)
 635             .setInstruction(applyActionIns(applyActions.toArray(new Action[applyActions.size()])))
 636             .build();
 637
 638         l3instructions.add(applyActionsIns);
 639         Instruction gotoTable = new InstructionBuilder().setOrder(order++)
 640             .setInstruction(gotoTableIns((short) (getTableId() + 1)))
 641             .build();
 642         l3instructions.add(gotoTable);
 643         Layer3Match m = null;
 644         Long etherType = null;
 645         String ikey = null;
 646         if (destL3Address.getIpAddress().getIpv4Address() != null) {
 647             ikey = destL3Address.getIpAddress().getIpv4Address().getValue() + "/32";
 648             etherType = IPv4;
 649             m = new Ipv4MatchBuilder().setIpv4Destination(new Ipv4Prefix(ikey)).build();
 650         } else if (destL3Address.getIpAddress().getIpv6Address() != null) {
 651             ikey = destL3Address.getIpAddress().getIpv6Address().getValue() + "/128";
 652             etherType = IPv6;
 653             m = new Ipv6MatchBuilder().setIpv6Destination(new Ipv6Prefix(ikey)).build();
 654         } else {
 655             LOG.error("Endpoint has IPAddress that is not recognised as either IPv4 or IPv6.", destL3Address.toString());
 656             return null;
 657         }
 658
 659         FlowId flowid = new FlowId(new StringBuilder().append(Integer.toString(epFwdCtxOrds.getL3Id()))
 660             .append("|l3|")
 661             .append(ikey)
 662             .append("|")
 663             .append(Integer.toString(epFwdCtxOrds.getEpgId()))
 664             .append("|")
 665             .append(Integer.toString(epFwdCtxOrds.getCgId()))
 666             .append("|")
 667             .append(matcherMac)
 668             .append("|")
 669             .append(destSubnetGatewayMac)
 670             .append("|")
 671             .append(nextHop)
 672             .toString());
 673         MatchBuilder mb = new MatchBuilder().setEthernetMatch(ethernetMatch(null, matcherMac, etherType))
 674             .setLayer3Match(m);
 675         addNxRegMatch(mb, RegMatch.of(NxmNxReg6.class, Long.valueOf(epFwdCtxOrds.getL3Id())));
 676         FlowBuilder flowb = base().setId(flowid)
 677             .setPriority(Integer.valueOf(132))
 678             .setMatch(mb.build())
 679             .setInstructions(new InstructionsBuilder().setInstruction(l3instructions).build());
 680         return flowb.build();
 681     }
 682
 683     private Flow createRemoteL2Flow(Endpoint ep, NodeId nodeId, EndpointFwdCtxOrdinals srcEpFwdCtxOrds,
 684             EndpointFwdCtxOrdinals destEpFwdCtxOrds, OfOverlayContext ofc) {
 685
 686         // TODO Li alagalah - refactor common code but keep simple method
 687
 688         // this endpoint is on a different switch; send to the
 689         // appropriate tunnel
 690
 691         ArrayList<Instruction> instructions = new ArrayList<>();
 692         List<Action> applyActions = new ArrayList<>();
 693
 694         int order = 0;
 695
 696         Action setdEPG = nxLoadRegAction(NxmNxReg2.class, BigInteger.valueOf(destEpFwdCtxOrds.getEpgId()));
 697         Action setdCG = nxLoadRegAction(NxmNxReg3.class, BigInteger.valueOf(destEpFwdCtxOrds.getCgId()));
 698         Action setNextHop;
 699         String nextHop;
 700
 701         // BEGIN TUNNEL HANDLING
 702         IpAddress tunDst = ctx.getSwitchManager().getTunnelIP(ofc.getNodeId(), TunnelTypeVxlan.class);
 703         NodeConnectorId tunPort = ctx.getSwitchManager().getTunnelPort(nodeId, TunnelTypeVxlan.class);
 704         if (tunDst == null) {
 705             LOG.warn("Failed to get Tunnel IP for NodeId {} with EP {}", nodeId, ep);
 706             return null;
 707         }
 708         if (tunPort == null) {
 709             LOG.warn("Failed to get Tunnel Port for NodeId {} with EP {}", nodeId, ep);
 710             return null;
 711         }
 712
 713         Action tundstAction;
 714
 715         if (tunDst.getIpv4Address() != null) {
 716             nextHop = tunDst.getIpv4Address().getValue();
 717             tundstAction = nxLoadTunIPv4Action(nextHop, false);
 718         } else if (tunDst.getIpv6Address() != null) {
 719             // nextHop = tunDst.getIpv6Address().getValue();
 720             LOG.error("IPv6 tunnel destination {} for {} not supported", tunDst.getIpv6Address().getValue(),
 721                     ofc.getNodeId());
 722             return null;
 723         } else {
 724             // this shouldn't happen
 725             LOG.error("Tunnel IP for {} invalid", ofc.getNodeId());
 726             return null;
 727         }
 728
 729         long portNum;
 730         try {
 731             portNum = getOfPortNum(tunPort);
 732         } catch (NumberFormatException ex) {
 733             LOG.warn("Could not parse port number {}", ofc.getNodeConnectorId(), ex);
 734             return null;
 735         }
 736
 737         setNextHop = nxLoadRegAction(NxmNxReg7.class, BigInteger.valueOf(portNum));
 738         applyActions.add(tundstAction);
 739         // END TUNNEL
 740
 741         order += 1;
 742         applyActions.add(setdEPG);
 743         applyActions.add(setdCG);
 744         applyActions.add(setNextHop);
 745         Instruction applyActionsIns = new InstructionBuilder().setOrder(order++)
 746             .setInstruction(applyActionIns(applyActions.toArray(new Action[applyActions.size()])))
 747             .build();
 748         instructions.add(applyActionsIns);
 749
 750         applyActionsIns = new InstructionBuilder().setOrder(order++)
 751             .setInstruction(applyActionIns(applyActions.toArray(new Action[applyActions.size()])))
 752             .build();
 753
 754         Instruction gotoTable = new InstructionBuilder().setOrder(order++)
 755             .setInstruction(gotoTableIns((short) (getTableId() + 1)))
 756             .build();
 757         instructions.add(gotoTable);
 758
 759         FlowId flowid = new FlowId(new StringBuilder().append(destEpFwdCtxOrds.getBdId())
 760             .append("|l2|")
 761             .append(ep.getMacAddress().getValue())
 762             .append("|")
 763             .append(srcEpFwdCtxOrds.getBdId())
 764             .append("|")
 765             .append(nextHop)
 766             .toString());
 767         MatchBuilder mb = new MatchBuilder().setEthernetMatch(ethernetMatch(null, ep.getMacAddress(), null));
 768         addNxRegMatch(mb, RegMatch.of(NxmNxReg4.class, Long.valueOf(destEpFwdCtxOrds.getBdId())));
 769         FlowBuilder flowb = base().setId(flowid)
 770             .setPriority(Integer.valueOf(50))
 771             .setMatch(mb.build())
 772             .setInstructions(new InstructionsBuilder().setInstruction(instructions).build());
 773
 774         return flowb.build();
 775     }
 776
 777     private Flow createRemoteL3RoutedFlow(Endpoint destEp, L3Address destL3Address, NodeId nodeId,
 778             EndpointFwdCtxOrdinals srcEpFwdCtxOrds, EndpointFwdCtxOrdinals destEpFwdCtxOrds, OfOverlayContext ofc,
 779             Subnet srcSubnet) {
 780
 781         // TODO Li alagalah - refactor common code but keep simple method
 782
 783         // this endpoint is on a different switch; send to the
 784         // appropriate tunnel
 785         Subnet destSubnet = null;
 786         HashSet<Subnet> subnets = getSubnets(destEp.getTenant());
 787         if (subnets == null) {
 788             LOG.trace("No subnets in tenant {}", destL3Address.getIpAddress());
 789             return null;
 790         }
 791         NetworkDomainId epNetworkContainment = getEPNetworkContainment(destEp);
 792         for (Subnet subnet : subnets) {
 793             // TODO Li alagalah add IPv6 support
 794             if (subnet.getId().getValue().equals(epNetworkContainment.getValue())) {
 795                 destSubnet = subnet;
 796                 break;
 797             }
 798         }
 799         if (destSubnet == null) {
 800             LOG.info("Destination IP address does not match any subnet in tenant {}", destL3Address.getIpAddress());
 801             return null;
 802         }
 803
 804         if (destSubnet.getVirtualRouterIp() == null) {
 805             LOG.trace("Destination subnet {} for Endpoint {}.{} has no gateway IP", destSubnet.getIpPrefix(),
 806                     destL3Address.getKey());
 807             return null;
 808         }
 809
 810         if (srcSubnet.getVirtualRouterIp() == null) {
 811             LOG.trace("Local subnet {} has no gateway IP", srcSubnet.getIpPrefix());
 812             return null;
 813         }
 814         L3Context destL3c = getL3ContextForSubnet(destEp.getTenant(), destSubnet);
 815         if (destL3c == null || destL3c.getId() == null) {
 816             LOG.error("No L3 Context found associated with subnet {}", destSubnet.getId());
 817             return null;
 818         }
 819         L3Context srcL3c = getL3ContextForSubnet(destEp.getTenant(), srcSubnet);
 820         if (srcL3c == null || srcL3c.getId() == null) {
 821             LOG.error("No L3 Context found associated with subnet {}", srcSubnet.getId());
 822             return null;
 823         }
 824
 825         if (!(srcL3c.getId().getValue().equals(destL3c.getId().getValue()))) {
 826             LOG.trace("Trying to route between two L3Contexts {} and {}. Not currently supported.", srcL3c.getId()
 827                 .getValue(), destL3c.getId().getValue());
 828             return null;
 829         }
 830
 831         MacAddress matcherMac = routerPortMac(destL3c, srcSubnet.getVirtualRouterIp());
 832         MacAddress epDestMac = destEp.getMacAddress();
 833         MacAddress destSubnetGatewayMac = routerPortMac(destL3c, destSubnet.getVirtualRouterIp());
 834
 835         ArrayList<Instruction> l3instructions = new ArrayList<>();
 836         List<Action> applyActions = new ArrayList<>();
 837         List<Action> l3ApplyActions = new ArrayList<>();
 838
 839         int order = 0;
 840
 841         Action setdEPG = nxLoadRegAction(NxmNxReg2.class, BigInteger.valueOf(destEpFwdCtxOrds.getEpgId()));
 842         Action setdCG = nxLoadRegAction(NxmNxReg3.class, BigInteger.valueOf(destEpFwdCtxOrds.getCgId()));
 843         Action setNextHop;
 844         String nextHop;
 845
 846         // BEGIN TUNNEL HANDLING
 847         IpAddress tunDst = ctx.getSwitchManager().getTunnelIP(ofc.getNodeId(), TunnelTypeVxlan.class);
 848         NodeConnectorId tunPort = ctx.getSwitchManager().getTunnelPort(nodeId, TunnelTypeVxlan.class);
 849         if (tunDst == null) {
 850             LOG.warn("Failed to get Tunnel IP for NodeId {} with L3Address {}", nodeId, destL3Address);
 851             return null;
 852         }
 853         if (tunPort == null) {
 854             LOG.warn("Failed to get Tunnel port for NodeId {} with L3Address {}", nodeId, destL3Address);
 855             return null;
 856         }
 857
 858         Action tundstAction;
 859
 860         if (tunDst.getIpv4Address() != null) {
 861             nextHop = tunDst.getIpv4Address().getValue();
 862             tundstAction = nxLoadTunIPv4Action(nextHop, false);
 863         } else if (tunDst.getIpv6Address() != null) {
 864             // nextHop = tunDst.getIpv6Address().getValue();
 865             LOG.error("IPv6 tunnel destination {} for {} not supported", tunDst.getIpv6Address().getValue(),
 866                     ofc.getNodeId());
 867             return null;
 868         } else {
 869             // this shouldn't happen
 870             LOG.error("Tunnel IP for {} invalid", ofc.getNodeId());
 871             return null;
 872         }
 873
 874         long portNum;
 875         try {
 876             portNum = getOfPortNum(tunPort);
 877         } catch (NumberFormatException ex) {
 878             LOG.warn("Could not parse port number {}", ofc.getNodeConnectorId(), ex);
 879             return null;
 880         }
 881
 882         setNextHop = nxLoadRegAction(NxmNxReg7.class, BigInteger.valueOf(portNum));
 883         applyActions.add(tundstAction);
 884         // END TUNNEL
 885
 886         order += 1;
 887         applyActions.add(setdEPG);
 888         applyActions.add(setdCG);
 889         applyActions.add(setNextHop);
 890
 891         Action setDlSrc = setDlSrcAction(destSubnetGatewayMac);
 892         l3ApplyActions.add(setDlSrc);
 893
 894         Action setDlDst = setDlDstAction(epDestMac);
 895         l3ApplyActions.add(setDlDst);
 896
 897         Action decTtl = decNwTtlAction();
 898         l3ApplyActions.add(decTtl);
 899
 900         applyActions.addAll(l3ApplyActions);
 901         Instruction applyActionsIns = new InstructionBuilder().setOrder(order++)
 902             .setInstruction(applyActionIns(applyActions.toArray(new Action[applyActions.size()])))
 903             .build();
 904
 905         l3instructions.add(applyActionsIns);
 906         Instruction gotoTable = new InstructionBuilder().setOrder(order++)
 907             .setInstruction(gotoTableIns((short) (getTableId() + 1)))
 908             .build();
 909         l3instructions.add(gotoTable);
 910         Layer3Match m = null;
 911         Long etherType = null;
 912         String ikey = null;
 913         if (destL3Address.getIpAddress().getIpv4Address() != null) {
 914             ikey = destL3Address.getIpAddress().getIpv4Address().getValue() + "/32";
 915             etherType = IPv4;
 916             m = new Ipv4MatchBuilder().setIpv4Destination(new Ipv4Prefix(ikey)).build();
 917         } else if (destL3Address.getIpAddress().getIpv6Address() != null) {
 918             ikey = destL3Address.getIpAddress().getIpv6Address().getValue() + "/128";
 919             etherType = IPv6;
 920             m = new Ipv6MatchBuilder().setIpv6Destination(new Ipv6Prefix(ikey)).build();
 921         } else {
 922             LOG.error("Endpoint has IPAddress that is not recognised as either IPv4 or IPv6.", destL3Address.toString());
 923             return null;
 924         }
 925
 926         FlowId flowid = new FlowId(new StringBuilder().append(Integer.toString(destEpFwdCtxOrds.getL3Id()))
 927             .append("|l3|")
 928             .append(ikey)
 929             .append("|")
 930             .append(matcherMac)
 931             .append("|")
 932             .append(destSubnetGatewayMac)
 933             .append("|")
 934             .append(srcEpFwdCtxOrds.getL3Id())
 935             .append("|")
 936             .append(nextHop)
 937             .toString());
 938         MatchBuilder mb = new MatchBuilder().setEthernetMatch(ethernetMatch(null, matcherMac, etherType))
 939             .setLayer3Match(m);
 940         addNxRegMatch(mb, RegMatch.of(NxmNxReg6.class, Long.valueOf(destEpFwdCtxOrds.getL3Id())));
 941
 942         FlowBuilder flowb = base().setId(flowid)
 943             .setPriority(Integer.valueOf(132))
 944             .setMatch(mb.build())
 945             .setInstructions(new InstructionsBuilder().setInstruction(l3instructions).build());
 946         return flowb.build();
 947     }
 948
 949     private NetworkDomainId getEPNetworkContainment(Endpoint endpoint) {
 950         if (endpoint.getNetworkContainment() != null) {
 951             return endpoint.getNetworkContainment();
 952         } else {
 953             /*
 954              * TODO: Be alagalah: Endpoint Refactor: This should be set on input
 955              * which we can't do because of the backwards way endpoints were
 956              * "architected".
 957              */
 958             return ctx.getPolicyResolver()
 959                 .getTenant(endpoint.getTenant())
 960                 .getEndpointGroup(endpoint.getEndpointGroup())
 961                 .getNetworkDomain();
 962         }
 963     }
 964
 965     private HashSet<Subnet> getSubnets(final TenantId tenantId) {
 966
 967         // if (subnetsByTenant.get(tenantId) != null) {
 968         // return subnetsByTenant.get(tenantId);
 969         // }
 970
 971         if (ctx.getDataBroker() == null) {
 972             return null;
 973         }
 974
 975         ReadOnlyTransaction t = ctx.getDataBroker().newReadOnlyTransaction();
 976         InstanceIdentifier<Tenant> tiid = TenantUtils.tenantIid(tenantId);
 977         Optional<Tenant> tenantInfo;
 978         try {
 979             tenantInfo = t.read(LogicalDatastoreType.CONFIGURATION, tiid).get();
 980         } catch (Exception e) {
 981             LOG.error("Could not read Tenant {}", tenantId, e);
 982             return null;
 983         }
 984
 985         HashSet<Subnet> subnets = new HashSet<Subnet>();
 986
 987         if (!tenantInfo.isPresent()) {
 988             LOG.warn("Tenant {} not found", tenantId);
 989             return null;
 990         }
 991
 992         subnets.addAll(tenantInfo.get().getSubnet());
 993         // subnetsByTenant.put(tenantId, subnets);
 994         return subnets;
 995     }
 996
 997     // Need a method to get subnets for EPs attached to the node locally
 998     // to set the source Mac address for the router interface.
 999     private List<Subnet> getLocalSubnets(NodeId nodeId) {
1000         Collection<Endpoint> endpointsForNode = ctx.getEndpointManager().getEndpointsForNode(nodeId);
1001
1002         List<Subnet> localSubnets = new ArrayList<Subnet>();
1003
1004         for (Endpoint endpoint : endpointsForNode) {
1005             HashSet<Subnet> subnets = getSubnets(endpoint.getTenant());
1006             if (subnets == null) {
1007                 LOG.error("No local subnets.");
1008                 return null;
1009             }
1010             NetworkDomainId epNetworkContainment = getEPNetworkContainment(endpoint);
1011             for (Subnet subnet : subnets) {
1012                 if (epNetworkContainment.getValue().equals(subnet.getId().getValue())) {
1013                     localSubnets.add(subnet);
1014                 }
1015             }
1016         }
1017         return localSubnets;
1018     }
1019
1020     /**
1021      * Reads data from datastore as synchronous call.
1022      *
1023      * @return {@link Optional#isPresent()} is {@code true} if reading was
1024      *         successful and data exists in datastore; {@link Optional#isPresent()} is
1025      *         {@code false} otherwise
1026      */
1027     public static <T extends DataObject> Optional<T> readFromDs(LogicalDatastoreType store, InstanceIdentifier<T> path,
1028             ReadTransaction rTx) {
1029         CheckedFuture<Optional<T>, ReadFailedException> resultFuture = rTx.read(store, path);
1030         try {
1031             return resultFuture.checkedGet();
1032         } catch (ReadFailedException e) {
1033             LOG.warn("Read failed from DS.", e);
1034             return Optional.absent();
1035         }
1036     }
1037
1038     static byte[] bytesFromHexString(String values) {
1039         String target = "";
1040         if (values != null) {
1041             target = values;
1042         }
1043         String[] octets = target.split(":");
1044
1045         byte[] ret = new byte[octets.length];
1046         for (int i = 0; i < octets.length; i++) {
1047             ret[i] = Integer.valueOf(octets[i], 16).byteValue();
1048         }
1049         return ret;
1050     }
1051 }