natservice/impl/src/main/java/org/opendaylight/netvirt/natservice/internal/VxlanGreConntrackBasedSnatService.java

   1 /*
   2  * Copyright © 2017 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 package org.opendaylight.netvirt.natservice.internal;
   9
  10 import java.math.BigInteger;
  11 import java.util.ArrayList;
  12 import java.util.Collections;
  13 import java.util.List;
  14
  15 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  16 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
  17 import org.opendaylight.genius.interfacemanager.interfaces.IInterfaceManager;
  18 import org.opendaylight.genius.mdsalutil.ActionInfo;
  19 import org.opendaylight.genius.mdsalutil.BucketInfo;
  20 import org.opendaylight.genius.mdsalutil.GroupEntity;
  21 import org.opendaylight.genius.mdsalutil.InstructionInfo;
  22 import org.opendaylight.genius.mdsalutil.MDSALUtil;
  23 import org.opendaylight.genius.mdsalutil.MatchInfo;
  24 import org.opendaylight.genius.mdsalutil.MatchInfoBase;
  25 import org.opendaylight.genius.mdsalutil.MetaDataUtil;
  26 import org.opendaylight.genius.mdsalutil.NwConstants;
  27 import org.opendaylight.genius.mdsalutil.actions.ActionGroup;
  28 import org.opendaylight.genius.mdsalutil.actions.ActionNxConntrack;
  29 import org.opendaylight.genius.mdsalutil.actions.ActionNxConntrack.NxCtAction;
  30 import org.opendaylight.genius.mdsalutil.actions.ActionNxLoadInPort;
  31 import org.opendaylight.genius.mdsalutil.actions.ActionNxResubmit;
  32 import org.opendaylight.genius.mdsalutil.actions.ActionSetFieldMeta;
  33 import org.opendaylight.genius.mdsalutil.actions.ActionSetFieldTunnelId;
  34 import org.opendaylight.genius.mdsalutil.instructions.InstructionApplyActions;
  35 import org.opendaylight.genius.mdsalutil.interfaces.IMdsalApiManager;
  36 import org.opendaylight.genius.mdsalutil.matches.MatchEthernetType;
  37 import org.opendaylight.genius.mdsalutil.matches.MatchIpv4Destination;
  38 import org.opendaylight.genius.mdsalutil.matches.MatchMetadata;
  39 import org.opendaylight.genius.mdsalutil.matches.MatchTunnelId;
  40 import org.opendaylight.genius.mdsalutil.nxmatches.NxMatchCtState;
  41 import org.opendaylight.netvirt.elanmanager.api.IElanService;
  42 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Uuid;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.IdManagerService;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.rpcs.rev160406.OdlInterfaceRpcService;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rpcs.rev160406.ItmRpcService;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.GroupTypes;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.ProviderTypes;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.ext.routers.Routers;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.ext.routers.routers.ExternalIps;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.types.rev160517.IpPrefixOrAddress;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.action.rev140421.NxActionNatFlags;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.action.rev140421.NxActionNatRangePresent;
  53 import org.slf4j.Logger;
  54 import org.slf4j.LoggerFactory;
  55
  56 public class VxlanGreConntrackBasedSnatService extends ConntrackBasedSnatService {
  57
  58     private static final Logger LOG = LoggerFactory.getLogger(VxlanGreConntrackBasedSnatService.class);
  59     private final ExternalRoutersListener externalRouterListener;
  60     private final IElanService elanManager;
  61
  62     public VxlanGreConntrackBasedSnatService(DataBroker dataBroker, IMdsalApiManager mdsalManager,
  63                                              ItmRpcService itmManager, OdlInterfaceRpcService odlInterfaceRpcService,
  64                                              IdManagerService idManager, NAPTSwitchSelector naptSwitchSelector,
  65                                              ExternalRoutersListener externalRouterListener, IElanService elanManager,
  66                                              IInterfaceManager interfaceManager) {
  67         super(dataBroker, mdsalManager, itmManager, idManager, naptSwitchSelector, odlInterfaceRpcService,
  68                 interfaceManager);
  69         this.externalRouterListener = externalRouterListener;
  70         this.elanManager = elanManager;
  71     }
  72
  73     @Override
  74     public boolean handleSnatAllSwitch(Routers routers, BigInteger primarySwitchId,  int addOrRemove) {
  75         ProviderTypes extNwProviderType = NatUtil.getProviderTypefromNetworkId(dataBroker, routers.getNetworkId());
  76         LOG.debug("VxlanGreConntrackBasedSnatService: handleSnatAllSwitch ProviderTypes {}", extNwProviderType);
  77         if (extNwProviderType == ProviderTypes.FLAT || extNwProviderType == ProviderTypes.VLAN) {
  78             return false;
  79         }
  80         return super.handleSnatAllSwitch(routers, primarySwitchId, addOrRemove);
  81     }
  82
  83     @Override
  84     public boolean handleSnat(Routers routers, BigInteger primarySwitchId, BigInteger dpnId,  int addOrRemove) {
  85         ProviderTypes extNwProviderType = NatUtil.getProviderTypefromNetworkId(dataBroker, routers.getNetworkId());
  86         LOG.debug("VxlanGreConntrackBasedSnatService: handleSnat ProviderTypes {}", extNwProviderType);
  87         if (extNwProviderType == ProviderTypes.FLAT || extNwProviderType == ProviderTypes.VLAN) {
  88             return false;
  89         }
  90         return super.handleSnat(routers, primarySwitchId, dpnId, addOrRemove);
  91     }
  92
  93     @Override
  94     protected void installSnatSpecificEntriesForNaptSwitch(Routers routers, BigInteger dpnId, int addOrRemove) {
  95         LOG.info("installSnatSpecificEntriesForNaptSwitch for router {}",
  96                 routers.getRouterName());
  97         String routerName = routers.getRouterName();
  98         Long routerId = NatUtil.getVpnId(dataBroker, routerName);
  99         int elanId = NatUtil.getElanInstanceByName(routers.getNetworkId().getValue(), dataBroker)
 100                 .getElanTag().intValue();
 101         /* Install Outbound NAT entries */
 102
 103         installSnatMissEntryForPrimrySwch(dpnId, routerId, elanId, addOrRemove);
 104         installTerminatingServiceTblEntryForVxlanGre(dpnId, routerName, routerId, elanId, addOrRemove);
 105         //Long extNetVpnId = NatUtil.getNetworkVpnIdFromRouterId(dataBroker, routerId);
 106         Uuid vpnUuid = NatUtil.getVpnIdfromNetworkId(dataBroker, routers.getNetworkId());
 107         if (vpnUuid == null) {
 108             LOG.error("installSnatSpecificEntriesForNaptSwitch: Unable to retrieve external vpn_id for "
 109                     + "external network {} with routerId {}", routers.getNetworkId(), routerId);
 110             return;
 111         }
 112         Long extNetVpnId = NatUtil.getVpnId(dataBroker, vpnUuid.getValue());
 113         /*//Long extNetVpnId = NatUtil.getAssociatedVPN(dataBroker, routers.getNetworkId(), LOG);
 114         if (extNetVpnId == NatConstants.INVALID_ID && addOrRemove == NwConstants.ADD_FLOW) {
 115             LOG.error("installSnatSpecificEntriesForNaptSwitch: Unable to retrieve external vpn_id for "
 116                     + "external network {} with routerId {}", routers.getNetworkId(), routerId);
 117             return;
 118         }*/
 119         LOG.info("installSnatSpecificEntriesForNaptSwitch: external network vpn_id {} for router {}",
 120                 extNetVpnId, routers.getRouterName());
 121         List<ExternalIps> externalIps = routers.getExternalIps();
 122         createOutboundTblTrackEntryForVxlanGre(dpnId, routerId, extNetVpnId, addOrRemove);
 123         createOutboundTblEntryForVxlanGre(dpnId, routerId, extNetVpnId, externalIps, elanId, addOrRemove);
 124         installNaptPfibFlowForVxlanGre(routers, dpnId, extNetVpnId, addOrRemove);
 125         installNaptPfibEntry(dpnId, routerId, addOrRemove);
 126
 127         //Install Inbound NAT entries
 128         installInboundEntryForVxlanGre(dpnId, routerId, extNetVpnId, externalIps, elanId, addOrRemove);
 129         if (externalIps.isEmpty()) {
 130             LOG.error("installSnatSpecificEntriesForNaptSwitch: No externalIP present for router {}",
 131                     routerName);
 132             return;
 133         }
 134         //The logic now handle only one external IP per router, others if present will be ignored.
 135         String externalIp = externalIps.get(0).getIpAddress();
 136         externalIp = NatUtil.validateAndAddNetworkMask(externalIp);
 137         WriteTransaction writeFlowInvTx = dataBroker.newWriteOnlyTransaction();
 138         if (addOrRemove == NwConstants.ADD_FLOW) {
 139             externalRouterListener.handleSnatReverseTraffic(dpnId, routers, routerId, routerName, externalIp,
 140                     writeFlowInvTx);
 141         } else {
 142             externalRouterListener.clearFibTsAndReverseTraffic(dpnId, routerId, routers.getNetworkId(),
 143                     Collections.singletonList(externalIp), null, routers.getExtGwMacAddress(), writeFlowInvTx);
 144         }
 145     }
 146
 147     protected void createOutboundTblTrackEntryForVxlanGre(BigInteger dpnId, Long routerId, Long extNetVpnId,
 148                                                int addOrRemove) {
 149         LOG.info("createOutboundTblTrackEntryForVxlanGre: Install Outbound tracking table flow on dpId {} for "
 150                 + "routerId {}", dpnId, routerId);
 151         List<MatchInfoBase> matches = new ArrayList<>();
 152         matches.add(MatchEthernetType.IPV4);
 153         matches.add(new NxMatchCtState(SNAT_CT_STATE, SNAT_CT_STATE_MASK));
 154         matches.add(new MatchMetadata(MetaDataUtil.getVpnIdMetadata(routerId), MetaDataUtil.METADATA_MASK_VRFID));
 155
 156         ArrayList<ActionInfo> listActionInfo = new ArrayList<>();
 157         if (addOrRemove == NwConstants.ADD_FLOW) {
 158             ActionSetFieldMeta actionSetFieldMeta = new ActionSetFieldMeta(MetaDataUtil
 159                     .getVpnIdMetadata(extNetVpnId));
 160             listActionInfo.add(actionSetFieldMeta);
 161         }
 162         ArrayList<InstructionInfo> instructionInfo = new ArrayList<>();
 163         listActionInfo.add(new ActionNxResubmit(NwConstants.NAPT_PFIB_TABLE));
 164         instructionInfo.add(new InstructionApplyActions(listActionInfo));
 165
 166         String flowRef = getFlowRef(dpnId, NwConstants.OUTBOUND_NAPT_TABLE, routerId);
 167         flowRef += "trkest";
 168         syncFlow(dpnId, NwConstants.OUTBOUND_NAPT_TABLE, flowRef, NatConstants.SNAT_TRK_FLOW_PRIORITY, flowRef,
 169                 NwConstants.COOKIE_SNAT_TABLE, matches, instructionInfo, addOrRemove);
 170
 171     }
 172
 173     protected void createOutboundTblEntryForVxlanGre(BigInteger dpnId, long routerId, Long extNetVpnId,
 174                                                      List<ExternalIps> externalIps, int elanId, int addOrRemove) {
 175         LOG.info("createOutboundTblEntryForVxlanGre: Install Outbound table flow on dpId {} for routerId {}", dpnId,
 176                 routerId);
 177         List<MatchInfoBase> matches = new ArrayList<>();
 178         matches.add(MatchEthernetType.IPV4);
 179         matches.add(new NxMatchCtState(TRACKED_NEW_CT_STATE, TRACKED_NEW_CT_MASK));
 180         matches.add(new MatchMetadata(MetaDataUtil.getVpnIdMetadata(routerId), MetaDataUtil.METADATA_MASK_VRFID));
 181         if (externalIps.isEmpty()) {
 182             LOG.error("createOutboundTblEntryForVxlanGre: No externalIP present for routerId {}",
 183                     routerId);
 184             return;
 185         }
 186         //The logic now handle only one external IP per router, others if present will be ignored.
 187         String externalIp = externalIps.get(0).getIpAddress();
 188         List<ActionInfo> actionsInfos = new ArrayList<>();
 189         if (addOrRemove == NwConstants.ADD_FLOW) {
 190             ActionSetFieldMeta actionSetFieldMeta = new ActionSetFieldMeta(MetaDataUtil
 191                     .getVpnIdMetadata(extNetVpnId));
 192             actionsInfos.add(actionSetFieldMeta);
 193         }
 194         List<ActionNxConntrack.NxCtAction> ctActionsListCommit = new ArrayList<>();
 195         int rangePresent = NxActionNatRangePresent.NXNATRANGEIPV4MIN.getIntValue();
 196         int flags = NxActionNatFlags.NXNATFSRC.getIntValue();
 197         ActionNxConntrack.NxCtAction nxCtActionCommit = new ActionNxConntrack.NxNat(0, flags, rangePresent,
 198                 new IpPrefixOrAddress(externalIp.toCharArray()).getIpAddress(),
 199                 null,0, 0);
 200         ctActionsListCommit.add(nxCtActionCommit);
 201         int ctCommitFlag = 1;
 202         ActionNxConntrack actionNxConntrackSubmit = new ActionNxConntrack(ctCommitFlag, 0, elanId,
 203                 NwConstants.NAPT_PFIB_TABLE, ctActionsListCommit);
 204         actionsInfos.add(actionNxConntrackSubmit);
 205         List<InstructionInfo> instructions = new ArrayList<>();
 206         instructions.add(new InstructionApplyActions(actionsInfos));
 207         String flowRef = getFlowRef(dpnId, NwConstants.OUTBOUND_NAPT_TABLE, routerId);
 208         syncFlow(dpnId, NwConstants.OUTBOUND_NAPT_TABLE, flowRef,  NatConstants.SNAT_NEW_FLOW_PRIORITY,
 209                 flowRef, NwConstants.COOKIE_SNAT_TABLE, matches, instructions, addOrRemove);
 210     }
 211
 212     protected void installNaptPfibFlowForVxlanGre(Routers routers, BigInteger dpnId, Long extNetVpnId,
 213                                                   int addOrRemove) {
 214         LOG.info("installNaptPfibFlowForVxlanGre: Install Napt preFibFlow on dpId {} with matching extNetVpnId {} "
 215                 + "for router {}", dpnId, extNetVpnId, routers.getRouterName());
 216         List<MatchInfoBase> matches = new ArrayList<>();
 217         matches.add(MatchEthernetType.IPV4);
 218         if (addOrRemove == NwConstants.ADD_FLOW) {
 219             matches.add(new MatchMetadata(MetaDataUtil.getVpnIdMetadata(extNetVpnId),
 220                     MetaDataUtil.METADATA_MASK_VRFID));
 221         }
 222         ArrayList<ActionInfo> listActionInfo = new ArrayList<>();
 223         ArrayList<InstructionInfo> instructions = new ArrayList<>();
 224         listActionInfo.add(new ActionNxLoadInPort(BigInteger.ZERO));
 225         listActionInfo.add(new ActionNxResubmit(NwConstants.L3_FIB_TABLE));
 226         instructions.add(new InstructionApplyActions(listActionInfo));
 227         String flowRef = getFlowRef(dpnId, NwConstants.NAPT_PFIB_TABLE, extNetVpnId);
 228         syncFlow(dpnId, NwConstants.NAPT_PFIB_TABLE, flowRef, NatConstants.SNAT_TRK_FLOW_PRIORITY,
 229                 flowRef, NwConstants.COOKIE_SNAT_TABLE, matches, instructions, addOrRemove);
 230     }
 231
 232     protected void installInboundEntryForVxlanGre(BigInteger dpnId, long routerId, Long extNeVpnId,
 233                                                   List<ExternalIps> externalIps, int elanId, int addOrRemove) {
 234         LOG.info("installInboundEntryForVxlanGre:  Install Inbound table entry on dpId {} for routerId {}",
 235                 dpnId, routerId);
 236         List<MatchInfoBase> matches = new ArrayList<>();
 237         matches.add(MatchEthernetType.IPV4);
 238         if (externalIps.isEmpty()) {
 239             LOG.error("installInboundEntryForVxlanGre : createInboundTblEntry no externalIP present for routerId {}",
 240                     routerId);
 241             return;
 242         }
 243         String externalIp = externalIps.get(0).getIpAddress();
 244         matches.add(new MatchIpv4Destination(externalIp,"32"));
 245         if (addOrRemove == NwConstants.ADD_FLOW) {
 246             matches.add(new MatchMetadata(MetaDataUtil.getVpnIdMetadata(extNeVpnId),
 247                     MetaDataUtil.METADATA_MASK_VRFID));
 248         }
 249         List<ActionInfo> actionsInfos = new ArrayList<>();
 250         List<ActionNxConntrack.NxCtAction> ctActionsList = new ArrayList<>();
 251         ActionNxConntrack.NxCtAction nxCtAction = new ActionNxConntrack.NxNat(0, 0, 0,null, null,0, 0);
 252         ActionSetFieldMeta actionSetFieldMeta = new ActionSetFieldMeta(MetaDataUtil
 253                 .getVpnIdMetadata(routerId));
 254         actionsInfos.add(actionSetFieldMeta);
 255         ctActionsList.add(nxCtAction);
 256         ActionNxConntrack actionNxConntrack = new ActionNxConntrack(0, 0, elanId, NwConstants
 257                 .NAPT_PFIB_TABLE,ctActionsList);
 258
 259         actionsInfos.add(actionNxConntrack);
 260         List<InstructionInfo> instructions = new ArrayList<>();
 261         instructions.add(new InstructionApplyActions(actionsInfos));
 262         String flowRef = getFlowRef(dpnId, NwConstants.INBOUND_NAPT_TABLE, routerId);
 263         syncFlow(dpnId, NwConstants.INBOUND_NAPT_TABLE, flowRef, NatConstants.DEFAULT_TS_FLOW_PRIORITY, flowRef,
 264                 NwConstants.COOKIE_SNAT_TABLE, matches, instructions, addOrRemove);
 265     }
 266
 267     protected void installTerminatingServiceTblEntryForVxlanGre(BigInteger dpnId, String routerName,
 268             Long  routerId, int elanId, int addOrRemove) {
 269         LOG.info("installTerminatingServiceTblEntryForVxlanGre : creating entry for"
 270                 + "Terminating Service Table for switch {}, routerId {}", dpnId, routerId);
 271         List<MatchInfo> matches = new ArrayList<>();
 272         matches.add(MatchEthernetType.IPV4);
 273
 274         BigInteger tunnelId = BigInteger.valueOf(routerId);
 275         if (elanManager.isOpenStackVniSemanticsEnforced()) {
 276             tunnelId = NatOverVxlanUtil.getRouterVni(idManager, routerName, routerId);
 277         }
 278         matches.add(new MatchTunnelId(tunnelId));
 279
 280         List<ActionInfo> actionsInfos = new ArrayList<>();
 281         List<NxCtAction> ctActionsList = new ArrayList<>();
 282         NxCtAction nxCtAction = new ActionNxConntrack.NxNat(0, 0, 0,null, null,0, 0);
 283         ctActionsList.add(nxCtAction);
 284         ActionNxConntrack actionNxConntrack = new ActionNxConntrack(0, 0, elanId, NwConstants
 285                 .OUTBOUND_NAPT_TABLE,ctActionsList);
 286         ActionSetFieldMeta actionSetFieldMeta = new ActionSetFieldMeta(MetaDataUtil
 287                 .getVpnIdMetadata(routerId.longValue()));
 288         actionsInfos.add(actionSetFieldMeta);
 289         actionsInfos.add(actionNxConntrack);
 290         List<InstructionInfo> instructions = new ArrayList<>();
 291         instructions.add(new InstructionApplyActions(actionsInfos));
 292         String flowRef = getFlowRef(dpnId, NwConstants.INTERNAL_TUNNEL_TABLE, routerId.longValue());
 293         syncFlow(dpnId,  NwConstants.INTERNAL_TUNNEL_TABLE, flowRef, NatConstants.DEFAULT_TS_FLOW_PRIORITY, flowRef,
 294                  NwConstants.COOKIE_SNAT_TABLE, matches, instructions, addOrRemove);
 295
 296     }
 297
 298     protected void installSnatMissEntry(BigInteger dpnId, Long routerId, String routerName, BigInteger primarySwitchId,
 299             int addOrRemove) {
 300         LOG.debug("installSnatMissEntry : Installing SNAT miss entry in switch {}", dpnId);
 301         List<ActionInfo> listActionInfoPrimary = new ArrayList<>();
 302         String ifNamePrimary = getTunnelInterfaceName(dpnId, primarySwitchId);
 303         List<BucketInfo> listBucketInfo = new ArrayList<>();
 304         if (ifNamePrimary != null) {
 305             LOG.debug("installSnatMissEntry : On Non- Napt switch , Primary Tunnel interface is {}", ifNamePrimary);
 306             listActionInfoPrimary = NatUtil.getEgressActionsForInterface(odlInterfaceRpcService, itmManager,
 307                     interfaceManager, ifNamePrimary, routerId);
 308         }
 309         BucketInfo bucketPrimary = new BucketInfo(listActionInfoPrimary);
 310         listBucketInfo.add(0, bucketPrimary);
 311         LOG.debug("installSnatMissEntry : installSnatMissEntry called for dpnId {} with primaryBucket {} ", dpnId,
 312                 listBucketInfo.get(0));
 313         // Install the select group
 314         long groupId = createGroupId(getGroupIdKey(routerName));
 315         GroupEntity groupEntity = MDSALUtil.buildGroupEntity(dpnId, groupId, routerName, GroupTypes.GroupAll,
 316                 listBucketInfo);
 317         LOG.debug("installSnatMissEntry : installing the SNAT to NAPT GroupEntity:{}", groupEntity);
 318         mdsalManager.installGroup(groupEntity);
 319         // Install miss entry pointing to group
 320         LOG.debug("installSnatMissEntry : buildSnatFlowEntity is called for dpId {}, routerName {} and groupId {}",
 321                 dpnId, routerName, groupId);
 322         List<MatchInfo> matches = new ArrayList<>();
 323         matches.add(new MatchEthernetType(0x0800L));
 324         matches.add(new MatchMetadata(MetaDataUtil.getVpnIdMetadata(routerId), MetaDataUtil.METADATA_MASK_VRFID));
 325
 326         List<ActionInfo> actionsInfo = new ArrayList<>();
 327
 328         BigInteger tunnelId = BigInteger.valueOf(routerId);
 329         if (elanManager.isOpenStackVniSemanticsEnforced()) {
 330             tunnelId = NatOverVxlanUtil.getRouterVni(idManager, routerName, routerId);
 331         }
 332
 333         actionsInfo.add(new ActionSetFieldTunnelId(tunnelId));
 334         LOG.debug("AbstractSnatService : Setting the tunnel to the list of action infos {}", actionsInfo);
 335         actionsInfo.add(new ActionGroup(groupId));
 336         List<InstructionInfo> instructions = new ArrayList<>();
 337         instructions.add(new InstructionApplyActions(actionsInfo));
 338         String flowRef = getFlowRef(dpnId, NwConstants.PSNAT_TABLE, routerId);
 339         syncFlow(dpnId, NwConstants.PSNAT_TABLE, flowRef,  NatConstants.DEFAULT_PSNAT_FLOW_PRIORITY, flowRef,
 340                 NwConstants.COOKIE_SNAT_TABLE, matches, instructions, addOrRemove);
 341     }
 342
 343 }