dhcpservice/impl/src/main/java/org/opendaylight/netvirt/dhcpservice/DhcpServiceUtils.java

   1 /*
   2  * Copyright (c) 2016 Ericsson India Global Services Pvt Ltd. 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.netvirt.dhcpservice;
  10
  11 import static org.opendaylight.controller.md.sal.binding.api.WriteTransaction.CREATE_MISSING_PARENTS;
  12
  13 import com.google.common.base.Optional;
  14 import java.math.BigInteger;
  15 import java.net.InetAddress;
  16 import java.net.UnknownHostException;
  17 import java.util.ArrayList;
  18 import java.util.Arrays;
  19 import java.util.Collections;
  20 import java.util.LinkedList;
  21 import java.util.List;
  22 import java.util.Objects;
  23 import java.util.concurrent.CopyOnWriteArrayList;
  24 import java.util.concurrent.ExecutionException;
  25 import java.util.function.BiConsumer;
  26 import java.util.function.Consumer;
  27 import java.util.stream.Collectors;
  28 import java.util.stream.LongStream;
  29 import org.eclipse.jdt.annotation.NonNull;
  30 import org.eclipse.jdt.annotation.Nullable;
  31 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  32 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  33 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  34 import org.opendaylight.genius.datastoreutils.SingleTransactionDataBroker;
  35 import org.opendaylight.genius.infra.Datastore.Configuration;
  36 import org.opendaylight.genius.infra.Datastore.Operational;
  37 import org.opendaylight.genius.infra.TypedReadWriteTransaction;
  38 import org.opendaylight.genius.infra.TypedWriteTransaction;
  39 import org.opendaylight.genius.interfacemanager.globals.InterfaceInfo;
  40 import org.opendaylight.genius.interfacemanager.interfaces.IInterfaceManager;
  41 import org.opendaylight.genius.mdsalutil.ActionInfo;
  42 import org.opendaylight.genius.mdsalutil.FlowEntity;
  43 import org.opendaylight.genius.mdsalutil.InstructionInfo;
  44 import org.opendaylight.genius.mdsalutil.MDSALUtil;
  45 import org.opendaylight.genius.mdsalutil.MatchInfo;
  46 import org.opendaylight.genius.mdsalutil.NWUtil;
  47 import org.opendaylight.genius.mdsalutil.NwConstants;
  48 import org.opendaylight.genius.mdsalutil.actions.ActionDrop;
  49 import org.opendaylight.genius.mdsalutil.actions.ActionPuntToController;
  50 import org.opendaylight.genius.mdsalutil.instructions.InstructionApplyActions;
  51 import org.opendaylight.genius.mdsalutil.interfaces.IMdsalApiManager;
  52 import org.opendaylight.genius.mdsalutil.matches.MatchArpOp;
  53 import org.opendaylight.genius.mdsalutil.matches.MatchArpTpa;
  54 import org.opendaylight.genius.mdsalutil.matches.MatchEthernetSource;
  55 import org.opendaylight.genius.mdsalutil.matches.MatchEthernetType;
  56 import org.opendaylight.genius.mdsalutil.matches.MatchIpProtocol;
  57 import org.opendaylight.genius.mdsalutil.matches.MatchTunnelId;
  58 import org.opendaylight.genius.mdsalutil.matches.MatchUdpDestinationPort;
  59 import org.opendaylight.genius.mdsalutil.matches.MatchUdpSourcePort;
  60 import org.opendaylight.genius.utils.ServiceIndex;
  61 import org.opendaylight.netvirt.dhcpservice.api.DhcpMConstants;
  62 import org.opendaylight.netvirt.elanmanager.api.ElanHelper;
  63 import org.opendaylight.netvirt.neutronvpn.api.utils.NeutronUtils;
  64 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
  65 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddressBuilder;
  66 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.InterfacesState;
  67 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.MacAddress;
  68 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Uuid;
  69 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.Flow;
  70 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.list.Instruction;
  71 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.ServiceBindings;
  72 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.ServiceModeIngress;
  73 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.ServiceTypeFlowBased;
  74 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.StypeOpenflow;
  75 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.StypeOpenflowBuilder;
  76 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.service.bindings.ServicesInfo;
  77 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.service.bindings.ServicesInfoKey;
  78 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.service.bindings.services.info.BoundServices;
  79 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.service.bindings.services.info.BoundServicesBuilder;
  80 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.service.bindings.services.info.BoundServicesKey;
  81 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.Nodes;
  82 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
  83 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.ElanDpnInterfaces;
  84 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.dpn.interfaces.ElanDpnInterfacesList;
  85 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.dpn.interfaces.ElanDpnInterfacesListKey;
  86 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.dpn.interfaces.elan.dpn.interfaces.list.DpnInterfaces;
  87 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.NetworkMaps;
  88 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.networkmaps.NetworkMap;
  89 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.networkmaps.NetworkMapKey;
  90 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.constants.rev150712.IpVersionBase;
  91 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.constants.rev150712.IpVersionV4;
  92 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.networks.rev150712.NetworkTypeVxlan;
  93 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.networks.rev150712.networks.attributes.Networks;
  94 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.networks.rev150712.networks.attributes.networks.Network;
  95 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.networks.rev150712.networks.attributes.networks.NetworkKey;
  96 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.ports.rev150712.port.attributes.FixedIps;
  97 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.ports.rev150712.ports.attributes.ports.Port;
  98 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.rev150712.Neutron;
  99 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.subnets.rev150712.subnets.attributes.Subnets;
 100 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.subnets.rev150712.subnets.attributes.subnets.Subnet;
 101 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.subnets.rev150712.subnets.attributes.subnets.SubnetKey;
 102 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.dhcpservice.api.rev150710.InterfaceNameMacAddresses;
 103 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.dhcpservice.api.rev150710.SubnetDhcpPortData;
 104 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.dhcpservice.api.rev150710._interface.name.mac.addresses.InterfaceNameMacAddress;
 105 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.dhcpservice.api.rev150710._interface.name.mac.addresses.InterfaceNameMacAddressBuilder;
 106 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.dhcpservice.api.rev150710._interface.name.mac.addresses.InterfaceNameMacAddressKey;
 107 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.dhcpservice.api.rev150710.subnet.dhcp.port.data.SubnetToDhcpPort;
 108 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.dhcpservice.api.rev150710.subnet.dhcp.port.data.SubnetToDhcpPortBuilder;
 109 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.dhcpservice.api.rev150710.subnet.dhcp.port.data.SubnetToDhcpPortKey;
 110 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
 111 import org.slf4j.Logger;
 112 import org.slf4j.LoggerFactory;
 113
 114 public final class DhcpServiceUtils {
 115
 116     private static final Logger LOG = LoggerFactory.getLogger(DhcpServiceUtils.class);
 117     private static List<BigInteger> connectedDpnIds = new CopyOnWriteArrayList<>();
 118
 119     private DhcpServiceUtils() { }
 120
 121     public static void setupDhcpFlowEntry(@Nullable BigInteger dpId, short tableId, @Nullable String vmMacAddress,
 122                                           int addOrRemove,
 123                                           IMdsalApiManager mdsalUtil, DhcpServiceCounters dhcpServiceCounters,
 124                                           TypedReadWriteTransaction<Configuration> tx)
 125             throws ExecutionException, InterruptedException {
 126         if (dpId == null || dpId.equals(DhcpMConstants.INVALID_DPID) || vmMacAddress == null) {
 127             return;
 128         }
 129         List<MatchInfo> matches = getDhcpMatch(vmMacAddress);
 130         List<InstructionInfo> instructions = new ArrayList<>();
 131         List<ActionInfo> actionsInfos = new ArrayList<>();
 132
 133         // Punt to controller
 134         actionsInfos.add(new ActionPuntToController());
 135         instructions.add(new InstructionApplyActions(actionsInfos));
 136         if (addOrRemove == NwConstants.DEL_FLOW) {
 137             LOG.trace("Removing DHCP Flow DpId {}, vmMacAddress {}", dpId, vmMacAddress);
 138             dhcpServiceCounters.removeDhcpFlow();
 139             mdsalUtil.removeFlow(tx, dpId, getDhcpFlowRef(dpId, tableId, vmMacAddress), tableId);
 140         } else {
 141             FlowEntity flowEntity = MDSALUtil.buildFlowEntity(dpId, tableId,
 142                     getDhcpFlowRef(dpId, tableId, vmMacAddress), DhcpMConstants.DEFAULT_DHCP_FLOW_PRIORITY,
 143                     "DHCP", 0, 0, DhcpMConstants.COOKIE_DHCP_BASE, matches, instructions);
 144             LOG.trace("Installing DHCP Flow DpId {}, vmMacAddress {}", dpId, vmMacAddress);
 145             dhcpServiceCounters.installDhcpFlow();
 146             mdsalUtil.addFlow(tx, flowEntity);
 147         }
 148     }
 149
 150     private static String getDhcpFlowRef(BigInteger dpId, long tableId, String vmMacAddress) {
 151         return new StringBuffer().append(DhcpMConstants.FLOWID_PREFIX)
 152                 .append(dpId).append(NwConstants.FLOWID_SEPARATOR)
 153                 .append(tableId).append(NwConstants.FLOWID_SEPARATOR)
 154                 .append(vmMacAddress).toString();
 155     }
 156
 157     private static String getDhcpArpFlowRef(BigInteger dpId, long tableId, long lportTag, String ipAddress) {
 158         return new StringBuffer().append(DhcpMConstants.FLOWID_PREFIX)
 159                 .append(dpId).append(NwConstants.FLOWID_SEPARATOR)
 160                 .append(tableId).append(NwConstants.FLOWID_SEPARATOR)
 161                 .append(lportTag).append(NwConstants.FLOWID_SEPARATOR)
 162                 .append(ipAddress).toString();
 163     }
 164
 165     public static void setupDhcpDropAction(BigInteger dpId, short tableId, String vmMacAddress, int addOrRemove,
 166                                            IMdsalApiManager mdsalUtil, DhcpServiceCounters dhcpServiceCounters,
 167                                            TypedReadWriteTransaction<Configuration> tx)
 168             throws ExecutionException, InterruptedException {
 169         if (dpId == null || dpId.equals(DhcpMConstants.INVALID_DPID) || vmMacAddress == null) {
 170             return;
 171         }
 172         List<MatchInfo> matches = getDhcpMatch(vmMacAddress);
 173
 174         List<ActionInfo> actionsInfos = new ArrayList<>();
 175         List<InstructionInfo> instructions = new ArrayList<>();
 176         instructions.add(new InstructionApplyActions(actionsInfos));
 177         // Drop Action
 178         actionsInfos.add(new ActionDrop());
 179         if (addOrRemove == NwConstants.DEL_FLOW) {
 180             LOG.trace("Removing DHCP Drop Flow DpId {}, vmMacAddress {}", dpId, vmMacAddress);
 181             dhcpServiceCounters.removeDhcpDropFlow();
 182             mdsalUtil.removeFlow(tx, dpId, getDhcpFlowRef(dpId, tableId, vmMacAddress), tableId);
 183         } else {
 184             FlowEntity flowEntity = MDSALUtil.buildFlowEntity(dpId, tableId,
 185                     getDhcpFlowRef(dpId, tableId, vmMacAddress), DhcpMConstants.DEFAULT_DHCP_FLOW_PRIORITY,
 186                     "DHCP", 0, 0, DhcpMConstants.COOKIE_DHCP_BASE, matches, instructions);
 187             LOG.trace("Installing DHCP Drop Flow DpId {}, vmMacAddress {}", dpId, vmMacAddress);
 188             dhcpServiceCounters.installDhcpDropFlow();
 189             mdsalUtil.addFlow(tx, flowEntity);
 190         }
 191     }
 192
 193     public static void setupDhcpArpRequest(BigInteger dpId, short tableId, BigInteger vni, String dhcpIpAddress,
 194                                            int lportTag, @Nullable Long elanTag, boolean add,
 195                                            IMdsalApiManager mdsalUtil, TypedReadWriteTransaction<Configuration> tx)
 196             throws ExecutionException, InterruptedException {
 197         List<MatchInfo> matches = getDhcpArpMatch(vni, dhcpIpAddress);
 198         if (add) {
 199             Flow flow = MDSALUtil.buildFlowNew(tableId, getDhcpArpFlowRef(dpId, tableId, lportTag, dhcpIpAddress),
 200                     DhcpMConstants.DEFAULT_DHCP_ARP_FLOW_PRIORITY, "DHCPArp", 0, 0,
 201                     generateDhcpArpCookie(lportTag, dhcpIpAddress), matches, null);
 202             LOG.trace("Removing DHCP ARP Flow DpId {}, DHCP Port IpAddress {}", dpId, dhcpIpAddress);
 203             mdsalUtil.removeFlow(tx, dpId, flow);
 204         } else {
 205             Flow flow = MDSALUtil.buildFlowNew(tableId, getDhcpArpFlowRef(dpId, tableId, lportTag, dhcpIpAddress),
 206                     DhcpMConstants.DEFAULT_DHCP_ARP_FLOW_PRIORITY, "DHCPArp", 0, 0,
 207                     generateDhcpArpCookie(lportTag, dhcpIpAddress), matches,
 208                     getDhcpArpInstructions(elanTag, lportTag));
 209             LOG.trace("Adding DHCP ARP Flow DpId {}, DHCPPort IpAddress {}", dpId, dhcpIpAddress);
 210             mdsalUtil.addFlow(tx, dpId, flow);
 211         }
 212     }
 213
 214     public static List<MatchInfo> getDhcpMatch() {
 215         List<MatchInfo> matches = new ArrayList<>();
 216         matches.add(MatchEthernetType.IPV4);
 217         matches.add(MatchIpProtocol.UDP);
 218         matches.add(new MatchUdpSourcePort(DhcpMConstants.DHCP_CLIENT_PORT));
 219         matches.add(new MatchUdpDestinationPort(DhcpMConstants.DHCP_SERVER_PORT));
 220         return matches;
 221     }
 222
 223     public static List<MatchInfo> getDhcpMatch(String vmMacAddress) {
 224         List<MatchInfo> matches = getDhcpMatch();
 225         matches.add(new MatchEthernetSource(new MacAddress(vmMacAddress)));
 226         return matches;
 227     }
 228
 229     private static List<MatchInfo> getDhcpArpMatch(BigInteger vni, String ipAddress) {
 230         return Arrays.asList(MatchEthernetType.ARP, MatchArpOp.REQUEST, new MatchTunnelId(vni),
 231                 new MatchArpTpa(ipAddress, "32"));
 232     }
 233
 234     private static List<Instruction> getDhcpArpInstructions(Long elanTag, int lportTag) {
 235         List<Instruction> mkInstructions = new ArrayList<>();
 236         int instructionKey = 0;
 237         mkInstructions.add(MDSALUtil.buildAndGetWriteMetadaInstruction(
 238                 ElanHelper.getElanMetadataLabel(elanTag, lportTag), ElanHelper.getElanMetadataMask(),
 239                 ++instructionKey));
 240         mkInstructions.add(MDSALUtil.buildAndGetGotoTableInstruction(NwConstants.ARP_RESPONDER_TABLE,
 241                 ++instructionKey));
 242         return mkInstructions;
 243     }
 244
 245     private static BigInteger generateDhcpArpCookie(int lportTag, String ipAddress) {
 246         try {
 247             BigInteger cookie = NwConstants.TUNNEL_TABLE_COOKIE.add(BigInteger.valueOf(255))
 248                     .add(BigInteger.valueOf(NWUtil.convertInetAddressToLong(InetAddress.getByName(ipAddress))));
 249             return cookie.add(BigInteger.valueOf(lportTag));
 250         } catch (UnknownHostException e) {
 251             return NwConstants.TUNNEL_TABLE_COOKIE.add(BigInteger.valueOf(lportTag));
 252         }
 253     }
 254
 255     public static List<BigInteger> getListOfDpns(DataBroker broker) {
 256         if (!connectedDpnIds.isEmpty()) {
 257             return connectedDpnIds;
 258         }
 259         return extractDpnsFromNodes(MDSALUtil.read(broker, LogicalDatastoreType.OPERATIONAL,
 260                 InstanceIdentifier.builder(Nodes.class).build()));
 261     }
 262
 263     @NonNull
 264     private static List<BigInteger> extractDpnsFromNodes(Optional<Nodes> optionalNodes) {
 265         return optionalNodes.toJavaUtil().map(
 266             nodes -> nodes.nonnullNode().stream().map(Node::getId).filter(Objects::nonNull).map(
 267                     MDSALUtil::getDpnIdFromNodeName).collect(
 268                     Collectors.toList())).orElse(Collections.emptyList());
 269     }
 270
 271     @NonNull
 272     public static List<BigInteger> getDpnsForElan(String elanInstanceName, DataBroker broker) {
 273         List<BigInteger> elanDpns = new LinkedList<>();
 274         InstanceIdentifier<ElanDpnInterfacesList> elanDpnInstanceIdentifier =
 275                 InstanceIdentifier.builder(ElanDpnInterfaces.class)
 276                         .child(ElanDpnInterfacesList.class, new ElanDpnInterfacesListKey(elanInstanceName)).build();
 277         Optional<ElanDpnInterfacesList> elanDpnOptional =
 278                 MDSALUtil.read(broker, LogicalDatastoreType.OPERATIONAL, elanDpnInstanceIdentifier);
 279         if (elanDpnOptional.isPresent()) {
 280             List<DpnInterfaces> dpns = elanDpnOptional.get().nonnullDpnInterfaces();
 281             for (DpnInterfaces dpnInterfaces : dpns) {
 282                 elanDpns.add(dpnInterfaces.getDpId());
 283             }
 284         }
 285         return elanDpns;
 286     }
 287
 288     public static org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state
 289             .@Nullable Interface getInterfaceFromOperationalDS(String interfaceName, DataBroker dataBroker) {
 290         org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces
 291                 .state.InterfaceKey interfaceKey =
 292                 new org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces
 293                         .state.InterfaceKey(interfaceName);
 294         InstanceIdentifier<org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508
 295                 .interfaces.state.Interface> interfaceId = InstanceIdentifier.builder(InterfacesState.class)
 296                 .child(org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508
 297                         .interfaces.state.Interface.class, interfaceKey).build();
 298         return MDSALUtil.read(LogicalDatastoreType.OPERATIONAL, interfaceId, dataBroker).orNull();
 299     }
 300
 301
 302     @Nullable
 303     public static String getSegmentationId(Uuid networkId, DataBroker broker) {
 304         InstanceIdentifier<Network> inst = InstanceIdentifier.create(Neutron.class)
 305                 .child(Networks.class).child(Network.class, new NetworkKey(networkId));
 306         Optional<Network> optionalNetwork = MDSALUtil.read(broker, LogicalDatastoreType.CONFIGURATION, inst);
 307         if (!optionalNetwork.isPresent()) {
 308             return null;
 309         }
 310         Network network = optionalNetwork.get();
 311         String segmentationId = NeutronUtils.getSegmentationIdFromNeutronNetwork(network, NetworkTypeVxlan.class);
 312         return segmentationId;
 313     }
 314
 315     public static String getJobKey(String interfaceName) {
 316         return new StringBuilder().append(DhcpMConstants.DHCP_JOB_KEY_PREFIX).append(interfaceName).toString();
 317     }
 318
 319     public static void bindDhcpService(String interfaceName, short tableId, TypedWriteTransaction<Configuration> tx) {
 320         int instructionKey = 0;
 321         List<Instruction> instructions = new ArrayList<>();
 322         instructions.add(MDSALUtil.buildAndGetGotoTableInstruction(tableId, ++instructionKey));
 323         short serviceIndex = ServiceIndex.getIndex(NwConstants.DHCP_SERVICE_NAME, NwConstants.DHCP_SERVICE_INDEX);
 324         BoundServices
 325                 serviceInfo =
 326                 getBoundServices(String.format("%s.%s", "dhcp", interfaceName),
 327                         serviceIndex, DhcpMConstants.DEFAULT_FLOW_PRIORITY,
 328                         DhcpMConstants.COOKIE_VM_INGRESS_TABLE, instructions);
 329         tx.put(buildServiceId(interfaceName, serviceIndex), serviceInfo, CREATE_MISSING_PARENTS);
 330     }
 331
 332     public static void unbindDhcpService(String interfaceName, TypedWriteTransaction<Configuration> tx) {
 333         short serviceIndex = ServiceIndex.getIndex(NwConstants.DHCP_SERVICE_NAME, NwConstants.DHCP_SERVICE_INDEX);
 334         tx.delete(buildServiceId(interfaceName, serviceIndex));
 335     }
 336
 337     private static InstanceIdentifier<BoundServices> buildServiceId(String interfaceName,
 338                                                              short dhcpServicePriority) {
 339         return InstanceIdentifier.builder(ServiceBindings.class)
 340                 .child(ServicesInfo.class, new ServicesInfoKey(interfaceName, ServiceModeIngress.class))
 341                 .child(BoundServices.class, new BoundServicesKey(dhcpServicePriority)).build();
 342     }
 343
 344     public static BoundServices getBoundServices(String serviceName, short servicePriority, int flowPriority,
 345                                           BigInteger cookie, List<Instruction> instructions) {
 346         StypeOpenflowBuilder augBuilder = new StypeOpenflowBuilder().setFlowCookie(cookie)
 347                 .setFlowPriority(flowPriority).setInstruction(instructions);
 348         return new BoundServicesBuilder().withKey(new BoundServicesKey(servicePriority))
 349                 .setServiceName(serviceName).setServicePriority(servicePriority)
 350                 .setServiceType(ServiceTypeFlowBased.class)
 351                 .addAugmentation(StypeOpenflow.class, augBuilder.build()).build();
 352     }
 353
 354     @SuppressWarnings("checkstyle:IllegalCatch")
 355     protected static void createSubnetDhcpPortData(Port port,
 356             BiConsumer<InstanceIdentifier<SubnetToDhcpPort>, SubnetToDhcpPort> consumer) {
 357         java.util.Optional<String> ip4Address = getIpV4Address(port);
 358         java.util.Optional<String> subnetId = getNeutronSubnetId(port);
 359         if (!(ip4Address.isPresent() && subnetId.isPresent())) {
 360             return;
 361         }
 362         LOG.trace("Adding SubnetPortData entry for subnet {}", subnetId.get());
 363         InstanceIdentifier<SubnetToDhcpPort> identifier = buildSubnetToDhcpPort(subnetId.get());
 364         SubnetToDhcpPort subnetToDhcpPort = getSubnetToDhcpPort(port, subnetId.get(), ip4Address.get());
 365         try {
 366             LOG.trace("Adding to SubnetToDhcpPort subnet {}  mac {}.", subnetId.get(),
 367                     port.getMacAddress().getValue());
 368             consumer.accept(identifier, subnetToDhcpPort);
 369         } catch (Exception e) {
 370             LOG.error("Failure while creating SubnetToDhcpPort map for network {}.", port.getNetworkId(), e);
 371         }
 372     }
 373
 374     @SuppressWarnings("checkstyle:IllegalCatch")
 375     protected static void removeSubnetDhcpPortData(Port port, Consumer<InstanceIdentifier<SubnetToDhcpPort>> consumer) {
 376         String subnetId = port.getDeviceId().substring("OpenDaylight".length() + 1);
 377         LOG.trace("Removing NetworkPortData entry for Subnet {}", subnetId);
 378         InstanceIdentifier<SubnetToDhcpPort> identifier = buildSubnetToDhcpPort(subnetId);
 379         try {
 380             consumer.accept(identifier);
 381             LOG.trace("Deleted SubnetDhcpPort for Subnet {}", subnetId);
 382         } catch (Exception e) {
 383             LOG.error("Failure while removing SubnetToDhcpPort for subnet {}.", subnetId, e);
 384         }
 385
 386     }
 387
 388     static InstanceIdentifier<SubnetToDhcpPort> buildSubnetToDhcpPort(String subnetId) {
 389         return InstanceIdentifier.builder(SubnetDhcpPortData.class)
 390                 .child(SubnetToDhcpPort.class, new SubnetToDhcpPortKey(subnetId)).build();
 391     }
 392
 393     public static java.util.Optional<SubnetToDhcpPort> getSubnetDhcpPortData(DataBroker broker, String subnetId) {
 394         InstanceIdentifier<SubnetToDhcpPort> id = buildSubnetToDhcpPort(subnetId);
 395         try {
 396             return java.util.Optional
 397                     .ofNullable(SingleTransactionDataBroker.syncRead(broker, LogicalDatastoreType.CONFIGURATION, id));
 398         } catch (ReadFailedException e) {
 399             LOG.warn("Failed to read SubnetToDhcpPort for DS due to error {}", e.getMessage());
 400         }
 401         return java.util.Optional.empty();
 402     }
 403
 404     static IpAddress convertLongToIp(long ip) {
 405         String[] array = LongStream.of(24, 16, 8, 0) //
 406                 .map(x -> ip >> x & 0xFF).boxed() //
 407                 .map(String::valueOf) //
 408                 .toArray(String[]::new);
 409         return IpAddressBuilder.getDefaultInstance(String.join(".", array));
 410     }
 411
 412     static long convertIpToLong(IpAddress ipa) {
 413         String[] splitIp = ipa.stringValue().split("\\.");
 414         long result = 0;
 415         for (String part : splitIp) {
 416             result <<= 8;
 417             result |= Integer.parseInt(part);
 418         }
 419         return result;
 420     }
 421
 422
 423     static SubnetToDhcpPort getSubnetToDhcpPort(Port port, String subnetId, String ipAddress) {
 424         return new SubnetToDhcpPortBuilder()
 425                 .withKey(new SubnetToDhcpPortKey(subnetId))
 426                 .setSubnetId(subnetId).setPortName(port.getUuid().getValue())
 427                 .setPortMacaddress(port.getMacAddress().getValue()).setPortFixedip(ipAddress).build();
 428     }
 429
 430     static InterfaceInfo getInterfaceInfo(IInterfaceManager interfaceManager, String interfaceName) {
 431         return interfaceManager.getInterfaceInfoFromOperationalDataStore(interfaceName);
 432     }
 433
 434     public static java.util.Optional<String> getIpV4Address(Port port) {
 435         if (port.getFixedIps() == null) {
 436             return java.util.Optional.empty();
 437         }
 438         return port.getFixedIps().stream().filter(DhcpServiceUtils::isIpV4AddressAvailable)
 439                 .map(v -> v.getIpAddress().getIpv4Address().getValue()).findFirst();
 440     }
 441
 442     public static java.util.Optional<String> getNeutronSubnetId(Port port) {
 443         if (port.getFixedIps() == null) {
 444             return java.util.Optional.empty();
 445         }
 446         return port.getFixedIps().stream().filter(DhcpServiceUtils::isIpV4AddressAvailable)
 447                 .map(v -> v.getSubnetId().getValue()).findFirst();
 448     }
 449
 450     public static boolean isIpV4AddressAvailable(FixedIps fixedIp) {
 451         return fixedIp != null && fixedIp.getIpAddress() != null && fixedIp.getIpAddress().getIpv4Address() != null;
 452     }
 453
 454     @Nullable
 455     public static String getAndUpdateVmMacAddress(TypedReadWriteTransaction<Operational> tx, String interfaceName,
 456             DhcpManager dhcpManager) throws ExecutionException, InterruptedException {
 457         InstanceIdentifier<InterfaceNameMacAddress> instanceIdentifier =
 458                 InstanceIdentifier.builder(InterfaceNameMacAddresses.class)
 459                         .child(InterfaceNameMacAddress.class, new InterfaceNameMacAddressKey(interfaceName)).build();
 460         Optional<InterfaceNameMacAddress> existingEntry = tx.read(instanceIdentifier).get();
 461         if (!existingEntry.isPresent()) {
 462             LOG.trace("Entry for interface {} missing in InterfaceNameVmMacAddress map", interfaceName);
 463             String vmMacAddress = getNeutronMacAddress(interfaceName, dhcpManager);
 464             if (vmMacAddress == null || vmMacAddress.isEmpty()) {
 465                 return null;
 466             }
 467             LOG.trace("Updating InterfaceNameVmMacAddress map with {}, {}", interfaceName,vmMacAddress);
 468             InterfaceNameMacAddress interfaceNameMacAddress =
 469                     new InterfaceNameMacAddressBuilder()
 470                             .withKey(new InterfaceNameMacAddressKey(interfaceName))
 471                             .setInterfaceName(interfaceName).setMacAddress(vmMacAddress).build();
 472             tx.merge(instanceIdentifier, interfaceNameMacAddress, CREATE_MISSING_PARENTS);
 473             return vmMacAddress;
 474         }
 475         return existingEntry.get().getMacAddress();
 476     }
 477
 478     @Nullable
 479     private static String getNeutronMacAddress(String interfaceName, DhcpManager dhcpManager) {
 480         Port port = dhcpManager.getNeutronPort(interfaceName);
 481         if (port != null) {
 482             LOG.trace("Port found in neutron. Interface Name {}, port {}", interfaceName, port);
 483             return port.getMacAddress().getValue();
 484         }
 485         return null;
 486     }
 487
 488     @NonNull
 489     public static List<Uuid> getSubnetIdsFromNetworkId(DataBroker broker, Uuid networkId) {
 490         InstanceIdentifier id = buildNetworkMapIdentifier(networkId);
 491         Optional<NetworkMap> optionalNetworkMap = MDSALUtil.read(broker, LogicalDatastoreType.CONFIGURATION, id);
 492         if (optionalNetworkMap.isPresent()) {
 493             @Nullable List<Uuid> subnetIdList = optionalNetworkMap.get().getSubnetIdList();
 494             if (subnetIdList != null) {
 495                 return subnetIdList;
 496             }
 497         }
 498         return Collections.emptyList();
 499     }
 500
 501     static InstanceIdentifier<NetworkMap> buildNetworkMapIdentifier(Uuid networkId) {
 502         return InstanceIdentifier.builder(NetworkMaps.class).child(NetworkMap.class,
 503             new NetworkMapKey(networkId)).build();
 504     }
 505
 506     public static boolean isIpv4Subnet(DataBroker broker, Uuid subnetUuid) {
 507         final SubnetKey subnetkey = new SubnetKey(subnetUuid);
 508         final InstanceIdentifier<Subnet> subnetidentifier = InstanceIdentifier.create(Neutron.class)
 509                 .child(Subnets.class).child(Subnet.class, subnetkey);
 510         final Optional<Subnet> subnet = MDSALUtil.read(broker, LogicalDatastoreType.CONFIGURATION, subnetidentifier);
 511         if (subnet.isPresent()) {
 512             Class<? extends IpVersionBase> ipVersionBase = subnet.get().getIpVersion();
 513             return IpVersionV4.class.equals(ipVersionBase);
 514         }
 515         return false;
 516     }
 517
 518     public static void addToDpnIdCache(BigInteger dpnId) {
 519         if (!connectedDpnIds.contains(dpnId)) {
 520             connectedDpnIds.add(dpnId);
 521         }
 522     }
 523
 524     public static void removeFromDpnIdCache(BigInteger dpnId) {
 525         connectedDpnIds.remove(dpnId);
 526     }
 527
 528 }
 529