ipv6service/impl/src/main/java/org/opendaylight/netvirt/ipv6service/utils/Ipv6ServiceUtils.java

   1 /*
   2  * Copyright © 2016, 2017 Red Hat, 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.netvirt.ipv6service.utils;
  10
  11 import com.google.common.base.Optional;
  12 import com.google.common.net.InetAddresses;
  13 import java.math.BigInteger;
  14 import java.net.InetAddress;
  15 import java.net.UnknownHostException;
  16 import java.nio.ByteBuffer;
  17 import java.util.ArrayList;
  18 import java.util.Arrays;
  19 import java.util.List;
  20 import java.util.concurrent.ExecutionException;
  21 import javax.inject.Inject;
  22 import javax.inject.Singleton;
  23 import org.apache.commons.lang3.StringUtils;
  24 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  25 import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
  26 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  27 import org.opendaylight.genius.mdsalutil.ActionInfo;
  28 import org.opendaylight.genius.mdsalutil.FlowEntity;
  29 import org.opendaylight.genius.mdsalutil.InstructionInfo;
  30 import org.opendaylight.genius.mdsalutil.MDSALUtil;
  31 import org.opendaylight.genius.mdsalutil.MatchInfo;
  32 import org.opendaylight.genius.mdsalutil.MetaDataUtil;
  33 import org.opendaylight.genius.mdsalutil.NwConstants;
  34 import org.opendaylight.genius.mdsalutil.actions.ActionPuntToController;
  35 import org.opendaylight.genius.mdsalutil.instructions.InstructionApplyActions;
  36 import org.opendaylight.genius.mdsalutil.interfaces.IMdsalApiManager;
  37 import org.opendaylight.genius.mdsalutil.matches.MatchEthernetType;
  38 import org.opendaylight.genius.mdsalutil.matches.MatchIcmpv6;
  39 import org.opendaylight.genius.mdsalutil.matches.MatchIpProtocol;
  40 import org.opendaylight.genius.mdsalutil.matches.MatchIpv6NdTarget;
  41 import org.opendaylight.genius.mdsalutil.matches.MatchMetadata;
  42 import org.opendaylight.genius.utils.ServiceIndex;
  43 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6Address;
  44 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.Interfaces;
  45 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.InterfacesState;
  46 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.InterfaceKey;
  47 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.Interface;
  48 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.MacAddress;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.list.Instruction;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.ServiceBindings;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.ServiceModeIngress;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.ServiceTypeFlowBased;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.StypeOpenflow;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.StypeOpenflowBuilder;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.service.bindings.ServicesInfo;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.service.bindings.ServicesInfoKey;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.service.bindings.services.info.BoundServices;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.service.bindings.services.info.BoundServicesBuilder;
  59 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.service.bindings.services.info.BoundServicesKey;
  60 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.ipv6service.nd.packet.rev160620.EthernetHeader;
  61 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.ipv6service.nd.packet.rev160620.Ipv6Header;
  62 import org.opendaylight.yangtools.yang.binding.DataObject;
  63 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  64 import org.slf4j.Logger;
  65 import org.slf4j.LoggerFactory;
  66
  67 @Singleton
  68 public class Ipv6ServiceUtils {
  69     private static final Logger LOG = LoggerFactory.getLogger(Ipv6ServiceUtils.class);
  70     public static final Ipv6Address ALL_NODES_MCAST_ADDR = newIpv6Address("FF02::1");
  71     public static final Ipv6Address UNSPECIFIED_ADDR = newIpv6Address("0:0:0:0:0:0:0:0");
  72
  73     private static Ipv6Address newIpv6Address(String ip) {
  74         try {
  75             return Ipv6Address.getDefaultInstance(InetAddress.getByName(ip).getHostAddress());
  76         } catch (UnknownHostException e) {
  77             LOG.error("Ipv6ServiceUtils: Error instantiating ipv6 address", e);
  78             return null;
  79         }
  80     }
  81
  82     private final DataBroker broker;
  83     private final IMdsalApiManager mdsalUtil;
  84
  85     @Inject
  86     public Ipv6ServiceUtils(DataBroker broker, IMdsalApiManager mdsalUtil) {
  87         this.broker = broker;
  88         this.mdsalUtil = mdsalUtil;
  89     }
  90
  91     /**
  92      * Retrieves the object from the datastore.
  93      * @param datastoreType the data store type.
  94      * @param path the wild card path.
  95      * @return the required object.
  96      */
  97     public <T extends DataObject> Optional<T> read(LogicalDatastoreType datastoreType, InstanceIdentifier<T> path) {
  98         try (ReadOnlyTransaction tx = broker.newReadOnlyTransaction()) {
  99             return tx.read(datastoreType, path).get();
 100         } catch (InterruptedException | ExecutionException e) {
 101             throw new RuntimeException(e);
 102         }
 103     }
 104
 105     /**
 106      * Retrieves the Interface from the datastore.
 107      * @param interfaceName the interface name
 108      * @return the interface.
 109      */
 110     public org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces
 111         .Interface getInterface(String interfaceName) {
 112         Optional<org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces
 113             .Interface> optInterface =
 114                 read(LogicalDatastoreType.CONFIGURATION, getInterfaceIdentifier(interfaceName));
 115         if (optInterface.isPresent()) {
 116             return optInterface.get();
 117         }
 118         return null;
 119     }
 120
 121     /**
 122      * Builds the interface identifier.
 123      * @param interfaceName the interface name.
 124      * @return the interface identifier.
 125      */
 126     public static InstanceIdentifier<org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508
 127             .interfaces.Interface> getInterfaceIdentifier(String interfaceName) {
 128         return InstanceIdentifier.builder(Interfaces.class)
 129                 .child(
 130                         org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces
 131                                 .Interface.class, new InterfaceKey(interfaceName)).build();
 132     }
 133
 134     /**
 135      * Build the interface state.
 136      * @param interfaceName the interface name.
 137      * @return the interface state.
 138      */
 139     public static InstanceIdentifier<org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508
 140             .interfaces.state.Interface> buildStateInterfaceId(String interfaceName) {
 141         InstanceIdentifier.InstanceIdentifierBuilder<Interface> idBuilder =
 142                 InstanceIdentifier.builder(InterfacesState.class)
 143                 .child(org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces
 144                         .state.Interface.class,
 145                         new org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces
 146                         .rev140508.interfaces.state.InterfaceKey(interfaceName));
 147         return idBuilder.build();
 148     }
 149
 150     /**
 151      * Retrieves the interface state.
 152      * @param interfaceName the interface name.
 153      * @return the interface state.
 154      */
 155     public org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state
 156             .Interface getInterfaceStateFromOperDS(String interfaceName) {
 157         InstanceIdentifier<org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508
 158                 .interfaces.state.Interface> ifStateId = buildStateInterfaceId(interfaceName);
 159         return MDSALUtil.read(LogicalDatastoreType.OPERATIONAL, ifStateId, broker).orNull();
 160     }
 161
 162     public static String bytesToHexString(byte[] bytes) {
 163         if (bytes == null) {
 164             return "null";
 165         }
 166         StringBuilder buf = new StringBuilder();
 167         for (int i = 0; i < bytes.length; i++) {
 168             if (i > 0) {
 169                 buf.append(":");
 170             }
 171             short u8byte = (short) (bytes[i] & 0xff);
 172             String tmp = Integer.toHexString(u8byte);
 173             if (tmp.length() == 1) {
 174                 buf.append("0");
 175             }
 176             buf.append(tmp);
 177         }
 178         return buf.toString();
 179     }
 180
 181     public static byte[] bytesFromHexString(String values) {
 182         String target = "";
 183         if (values != null) {
 184             target = values;
 185         }
 186         String[] octets = target.split(":");
 187
 188         byte[] ret = new byte[octets.length];
 189         for (int i = 0; i < octets.length; i++) {
 190             ret[i] = Integer.valueOf(octets[i], 16).byteValue();
 191         }
 192         return ret;
 193     }
 194
 195     public static int calcIcmpv6Checksum(byte[] packet, Ipv6Header ip6Hdr) {
 196         long checksum = getSummation(ip6Hdr.getSourceIpv6());
 197         checksum += getSummation(ip6Hdr.getDestinationIpv6());
 198         checksum = normalizeChecksum(checksum);
 199
 200         checksum += ip6Hdr.getIpv6Length();
 201         checksum += ip6Hdr.getNextHeader();
 202
 203         int icmp6Offset = Ipv6Constants.ICMPV6_OFFSET;
 204         long value = (packet[icmp6Offset] & 0xff) << 8 | packet[icmp6Offset + 1] & 0xff;
 205         checksum += value;
 206         checksum = normalizeChecksum(checksum);
 207         icmp6Offset += 2;
 208
 209         //move to icmp6 payload skipping the checksum field
 210         icmp6Offset += 2;
 211         int length = packet.length - icmp6Offset;
 212         while (length > 1) {
 213             value = (packet[icmp6Offset] & 0xff) << 8 | packet[icmp6Offset + 1] & 0xff;
 214             checksum += value;
 215             checksum = normalizeChecksum(checksum);
 216             icmp6Offset += 2;
 217             length -= 2;
 218         }
 219
 220         if (length > 0) {
 221             checksum += packet[icmp6Offset];
 222             checksum = normalizeChecksum(checksum);
 223         }
 224
 225         int finalChecksum = (int)(~checksum & 0xffff);
 226         return finalChecksum;
 227     }
 228
 229     public static boolean validateChecksum(byte[] packet, Ipv6Header ip6Hdr, int recvChecksum) {
 230         return calcIcmpv6Checksum(packet, ip6Hdr) == recvChecksum;
 231     }
 232
 233     private static long getSummation(Ipv6Address addr) {
 234         byte[] baddr = null;
 235         try {
 236             baddr = InetAddress.getByName(addr.getValue()).getAddress();
 237         } catch (UnknownHostException e) {
 238             LOG.error("getSummation: Failed to deserialize address {}", addr.getValue(), e);
 239             return 0;
 240         }
 241
 242         long sum = 0;
 243         int len = 0;
 244         long value = 0;
 245         while (len < baddr.length) {
 246             value = (baddr[len] & 0xff) << 8 | baddr[len + 1] & 0xff;
 247             sum += value;
 248             sum = normalizeChecksum(sum);
 249             len += 2;
 250         }
 251         return sum;
 252     }
 253
 254     private static  long normalizeChecksum(long value) {
 255         if ((value & 0xffff0000) != 0) {
 256             value = value & 0xffff;
 257             value += 1;
 258         }
 259         return value;
 260     }
 261
 262     public static byte[] convertEthernetHeaderToByte(EthernetHeader ethPdu) {
 263         byte[] data = new byte[16];
 264         Arrays.fill(data, (byte)0);
 265
 266         ByteBuffer buf = ByteBuffer.wrap(data);
 267         buf.put(bytesFromHexString(ethPdu.getDestinationMac().getValue()));
 268         buf.put(bytesFromHexString(ethPdu.getSourceMac().getValue()));
 269         buf.putShort((short)ethPdu.getEthertype().intValue());
 270         return data;
 271     }
 272
 273     public static byte[] convertIpv6HeaderToByte(Ipv6Header ip6Pdu) {
 274         byte[] data = new byte[128];
 275         Arrays.fill(data, (byte)0);
 276
 277         ByteBuffer buf = ByteBuffer.wrap(data);
 278         long flowLabel = (long)(ip6Pdu.getVersion() & 0x0f) << 28
 279                 | ip6Pdu.getFlowLabel() & 0x0fffffff;
 280         buf.putInt((int)flowLabel);
 281         buf.putShort((short)ip6Pdu.getIpv6Length().intValue());
 282         buf.put((byte)ip6Pdu.getNextHeader().shortValue());
 283         buf.put((byte)ip6Pdu.getHopLimit().shortValue());
 284         try {
 285             byte[] baddr = InetAddress.getByName(ip6Pdu.getSourceIpv6().getValue()).getAddress();
 286             buf.put(baddr);
 287             baddr = InetAddress.getByName(ip6Pdu.getDestinationIpv6().getValue()).getAddress();
 288             buf.put(baddr);
 289         } catch (UnknownHostException e) {
 290             LOG.error("convertIpv6HeaderToByte: Failed to serialize src, dest address", e);
 291         }
 292         return data;
 293     }
 294
 295     public static Ipv6Address getIpv6LinkLocalAddressFromMac(MacAddress mac) {
 296         byte[] octets = bytesFromHexString(mac.getValue());
 297
 298         /* As per the RFC2373, steps involved to generate a LLA include
 299            1. Convert the 48 bit MAC address to 64 bit value by inserting 0xFFFE
 300               between OUI and NIC Specific part.
 301            2. Invert the Universal/Local flag in the OUI portion of the address.
 302            3. Use the prefix "FE80::/10" along with the above 64 bit Interface
 303               identifier to generate the IPv6 LLA. */
 304
 305         StringBuilder interfaceID = new StringBuilder();
 306         short u8byte = (short) (octets[0] & 0xff);
 307         u8byte ^= 1 << 1;
 308         interfaceID.append(Integer.toHexString(0xFF & u8byte));
 309         interfaceID.append(StringUtils.leftPad(Integer.toHexString(0xFF & octets[1]), 2, "0"));
 310         interfaceID.append(":");
 311         interfaceID.append(Integer.toHexString(0xFF & octets[2]));
 312         interfaceID.append("ff:fe");
 313         interfaceID.append(StringUtils.leftPad(Integer.toHexString(0xFF & octets[3]), 2, "0"));
 314         interfaceID.append(":");
 315         interfaceID.append(Integer.toHexString(0xFF & octets[4]));
 316         interfaceID.append(StringUtils.leftPad(Integer.toHexString(0xFF & octets[5]), 2, "0"));
 317
 318         // Return the address in its fully expanded format.
 319         Ipv6Address ipv6LLA = new Ipv6Address(InetAddresses.forString(
 320                 "fe80:0:0:0:" + interfaceID.toString()).getHostAddress());
 321         return ipv6LLA;
 322     }
 323
 324     public static Ipv6Address getIpv6SolicitedNodeMcastAddress(Ipv6Address ipv6Address) {
 325
 326         /* According to RFC 4291, a Solicited Node Multicast Address is derived by adding the 24
 327            lower order bits with the Solicited Node multicast prefix (i.e., FF02::1:FF00:0/104).
 328            Example: For IPv6Address of FE80::2AA:FF:FE28:9C5A, the corresponding solicited node
 329            multicast address would be FF02::1:FF28:9C5A
 330          */
 331
 332         byte[] octets;
 333         try {
 334             octets = InetAddress.getByName(ipv6Address.getValue()).getAddress();
 335         } catch (UnknownHostException e) {
 336             LOG.error("getIpv6SolicitedNodeMcastAddress: Failed to serialize ipv6Address ", e);
 337             return null;
 338         }
 339
 340         // Return the address in its fully expanded format.
 341         Ipv6Address solictedV6Address = new Ipv6Address(InetAddresses.forString("ff02::1:ff"
 342                  + StringUtils.leftPad(Integer.toHexString(0xFF & octets[13]), 2, "0") + ":"
 343                  + StringUtils.leftPad(Integer.toHexString(0xFF & octets[14]), 2, "0")
 344                  + StringUtils.leftPad(Integer.toHexString(0xFF & octets[15]), 2, "0")).getHostAddress());
 345
 346         return solictedV6Address;
 347     }
 348
 349     public static MacAddress getIpv6MulticastMacAddress(Ipv6Address ipv6Address) {
 350
 351         /* According to RFC 2464, a Multicast MAC address is derived by concatenating 32 lower
 352            order bits of IPv6 Multicast Address with the multicast prefix (i.e., 33:33).
 353            Example: For Multicast IPv6Address of FF02::1:FF28:9C5A, the corresponding L2 multicast
 354            address would be 33:33:28:9C:5A
 355          */
 356         byte[] octets;
 357         try {
 358             octets = InetAddress.getByName(ipv6Address.getValue()).getAddress();
 359         } catch (UnknownHostException e) {
 360             LOG.error("getIpv6MulticastMacAddress: Failed to serialize ipv6Address ", e);
 361             return null;
 362         }
 363
 364         String macAddress = "33:33:"
 365                 + StringUtils.leftPad(Integer.toHexString(0xFF & octets[12]), 2, "0") + ":"
 366                 + StringUtils.leftPad(Integer.toHexString(0xFF & octets[13]), 2, "0") + ":"
 367                 + StringUtils.leftPad(Integer.toHexString(0xFF & octets[14]), 2, "0") + ":"
 368                 + StringUtils.leftPad(Integer.toHexString(0xFF & octets[15]), 2, "0");
 369
 370         return new MacAddress(macAddress);
 371     }
 372
 373     private static List<MatchInfo> getIcmpv6RSMatch(Long elanTag) {
 374         List<MatchInfo> matches = new ArrayList<>();
 375         matches.add(MatchEthernetType.IPV6);
 376         matches.add(MatchIpProtocol.ICMPV6);
 377         matches.add(new MatchIcmpv6(Ipv6Constants.ICMP_V6_RS_CODE, (short) 0));
 378         matches.add(new MatchMetadata(MetaDataUtil.getElanTagMetadata(elanTag), MetaDataUtil.METADATA_MASK_SERVICE));
 379         return matches;
 380     }
 381
 382     private List<MatchInfo> getIcmpv6NSMatch(Long elanTag, String ndTarget) {
 383         List<MatchInfo> matches = new ArrayList<>();
 384         matches.add(MatchEthernetType.IPV6);
 385         matches.add(MatchIpProtocol.ICMPV6);
 386         matches.add(new MatchIcmpv6(Ipv6Constants.ICMP_V6_NS_CODE, (short) 0));
 387         matches.add(new MatchIpv6NdTarget(new Ipv6Address(ndTarget)));
 388         matches.add(new MatchMetadata(MetaDataUtil.getElanTagMetadata(elanTag), MetaDataUtil.METADATA_MASK_SERVICE));
 389         return matches;
 390     }
 391
 392     private static String getIPv6FlowRef(BigInteger dpId, Long elanTag, String flowType) {
 393         return new StringBuffer().append(Ipv6Constants.FLOWID_PREFIX)
 394                 .append(dpId).append(Ipv6Constants.FLOWID_SEPARATOR)
 395                 .append(elanTag).append(Ipv6Constants.FLOWID_SEPARATOR)
 396                 .append(flowType).toString();
 397     }
 398
 399     public void installIcmpv6NsPuntFlow(short tableId, BigInteger dpId,  Long elanTag, String ipv6Address,
 400             int addOrRemove) {
 401         List<MatchInfo> neighborSolicitationMatch = getIcmpv6NSMatch(elanTag, ipv6Address);
 402         List<InstructionInfo> instructions = new ArrayList<>();
 403         List<ActionInfo> actionsInfos = new ArrayList<>();
 404         actionsInfos.add(new ActionPuntToController());
 405         instructions.add(new InstructionApplyActions(actionsInfos));
 406         FlowEntity rsFlowEntity = MDSALUtil.buildFlowEntity(dpId, tableId,
 407                 getIPv6FlowRef(dpId, elanTag, ipv6Address),Ipv6Constants.DEFAULT_FLOW_PRIORITY, "IPv6NS",
 408                 0, 0, NwConstants.COOKIE_IPV6_TABLE, neighborSolicitationMatch, instructions);
 409         if (addOrRemove == Ipv6Constants.DEL_FLOW) {
 410             LOG.trace("Removing IPv6 Neighbor Solicitation Flow DpId {}, elanTag {}", dpId, elanTag);
 411             mdsalUtil.removeFlow(rsFlowEntity);
 412         } else {
 413             LOG.trace("Installing IPv6 Neighbor Solicitation Flow DpId {}, elanTag {}", dpId, elanTag);
 414             mdsalUtil.installFlow(rsFlowEntity);
 415         }
 416     }
 417
 418     public void installIcmpv6RsPuntFlow(short tableId, BigInteger dpId, Long elanTag, int addOrRemove) {
 419         if (dpId == null || dpId.equals(Ipv6Constants.INVALID_DPID)) {
 420             return;
 421         }
 422         List<MatchInfo> routerSolicitationMatch = getIcmpv6RSMatch(elanTag);
 423         List<InstructionInfo> instructions = new ArrayList<>();
 424         List<ActionInfo> actionsInfos = new ArrayList<>();
 425         // Punt to controller
 426         actionsInfos.add(new ActionPuntToController());
 427         instructions.add(new InstructionApplyActions(actionsInfos));
 428         FlowEntity rsFlowEntity = MDSALUtil.buildFlowEntity(dpId, tableId,
 429                 getIPv6FlowRef(dpId, elanTag, "IPv6RS"),Ipv6Constants.DEFAULT_FLOW_PRIORITY, "IPv6RS", 0, 0,
 430                 NwConstants.COOKIE_IPV6_TABLE, routerSolicitationMatch, instructions);
 431         if (addOrRemove == Ipv6Constants.DEL_FLOW) {
 432             LOG.trace("Removing IPv6 Router Solicitation Flow DpId {}, elanTag {}", dpId, elanTag);
 433             mdsalUtil.removeFlow(rsFlowEntity);
 434         } else {
 435             LOG.trace("Installing IPv6 Router Solicitation Flow DpId {}, elanTag {}", dpId, elanTag);
 436             mdsalUtil.installFlow(rsFlowEntity);
 437         }
 438     }
 439
 440     public BoundServices getBoundServices(String serviceName, short servicePriority, int flowPriority,
 441                                           BigInteger cookie, List<Instruction> instructions) {
 442         StypeOpenflowBuilder augBuilder = new StypeOpenflowBuilder().setFlowCookie(cookie)
 443                 .setFlowPriority(flowPriority).setInstruction(instructions);
 444         return new BoundServicesBuilder().setKey(new BoundServicesKey(servicePriority))
 445                 .setServiceName(serviceName).setServicePriority(servicePriority)
 446                 .setServiceType(ServiceTypeFlowBased.class)
 447                 .addAugmentation(StypeOpenflow.class, augBuilder.build()).build();
 448     }
 449
 450     private InstanceIdentifier<BoundServices> buildServiceId(String interfaceName,
 451                                               short priority) {
 452         return InstanceIdentifier.builder(ServiceBindings.class).child(ServicesInfo.class,
 453                 new ServicesInfoKey(interfaceName, ServiceModeIngress.class))
 454                 .child(BoundServices.class, new BoundServicesKey(priority)).build();
 455     }
 456
 457     public void bindIpv6Service(String interfaceName, Long elanTag, short tableId) {
 458         int instructionKey = 0;
 459         List<Instruction> instructions = new ArrayList<>();
 460         instructions.add(MDSALUtil.buildAndGetWriteMetadaInstruction(MetaDataUtil.getElanTagMetadata(elanTag),
 461                 MetaDataUtil.METADATA_MASK_SERVICE, ++instructionKey));
 462         instructions.add(MDSALUtil.buildAndGetGotoTableInstruction(tableId, ++instructionKey));
 463         short serviceIndex = ServiceIndex.getIndex(NwConstants.IPV6_SERVICE_NAME, NwConstants.IPV6_SERVICE_INDEX);
 464         BoundServices
 465                 serviceInfo =
 466                 getBoundServices(String.format("%s.%s", "ipv6", interfaceName),
 467                         serviceIndex, Ipv6Constants.DEFAULT_FLOW_PRIORITY,
 468                         NwConstants.COOKIE_IPV6_TABLE, instructions);
 469         MDSALUtil.syncWrite(broker, LogicalDatastoreType.CONFIGURATION,
 470                 buildServiceId(interfaceName, serviceIndex), serviceInfo);
 471     }
 472
 473     public void unbindIpv6Service(String interfaceName) {
 474         MDSALUtil.syncDelete(broker, LogicalDatastoreType.CONFIGURATION,
 475                 buildServiceId(interfaceName, ServiceIndex.getIndex(NwConstants.IPV6_SERVICE_NAME,
 476                         NwConstants.IPV6_SERVICE_INDEX)));
 477     }
 478 }