git.opendaylight Code Review - netvirt.git/blob

   1 /*
   2  * Copyright (c) 2016 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 package org.opendaylight.netvirt.aclservice;
   9
  10 import java.math.BigInteger;
  11 import java.util.ArrayList;
  12 import java.util.List;
  13 import java.util.Map;
  14 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  15 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  16 import org.opendaylight.genius.mdsalutil.ActionInfo;
  17 import org.opendaylight.genius.mdsalutil.ActionType;
  18 import org.opendaylight.genius.mdsalutil.InstructionInfo;
  19 import org.opendaylight.genius.mdsalutil.InstructionType;
  20 import org.opendaylight.genius.mdsalutil.MDSALUtil;
  21 import org.opendaylight.genius.mdsalutil.MatchFieldType;
  22 import org.opendaylight.genius.mdsalutil.MatchInfo;
  23 import org.opendaylight.genius.mdsalutil.MatchInfoBase;
  24 import org.opendaylight.genius.mdsalutil.NwConstants;
  25 import org.opendaylight.genius.mdsalutil.NxMatchFieldType;
  26 import org.opendaylight.genius.mdsalutil.NxMatchInfo;
  27 import org.opendaylight.genius.mdsalutil.interfaces.IMdsalApiManager;
  28 import org.opendaylight.genius.utils.ServiceIndex;
  29 import org.opendaylight.netvirt.aclservice.api.AclServiceManager.Action;
  30 import org.opendaylight.netvirt.aclservice.utils.AclConstants;
  31 import org.opendaylight.netvirt.aclservice.utils.AclServiceOFFlowBuilder;
  32 import org.opendaylight.netvirt.aclservice.utils.AclServiceUtils;
  33 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160218.access.lists.Acl;
  34 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160218.access.lists.acl.AccessListEntries;
  35 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160218.access.lists.acl.access.list.entries.Ace;
  36 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160218.access.lists.acl.access.list.entries.ace.Matches;
  37 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160218.access.lists.acl.access.list.entries.ace.matches.AceType;
  38 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160218.access.lists.acl.access.list.entries.ace.matches.ace.type.AceIp;
  39 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Uuid;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.list.Instruction;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.ServiceModeIngress;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.service.bindings.services.info.BoundServices;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.aclservice.rev160608.DirectionEgress;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.aclservice.rev160608.IpPrefixOrAddress;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.aclservice.rev160608.SecurityRuleAttr;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.aclservice.rev160608.interfaces._interface.AllowedAddressPairs;
  47 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  48 import org.slf4j.Logger;
  49 import org.slf4j.LoggerFactory;
  50
  51 /**
  52  * Provides the stateful implementation for egress (w.r.t VM) ACL service.
  53  *
  54  * <p>
  55  * Note: Table names used are w.r.t switch. Hence, switch ingress is VM egress
  56  * and vice versa.
  57  */
  58 public class EgressAclServiceImpl extends AbstractAclServiceImpl {
  59
  60     private static final Logger LOG = LoggerFactory.getLogger(EgressAclServiceImpl.class);
  61
  62     /**
  63      * Initialize the member variables.
  64      *
  65      * @param dataBroker the data broker instance.
  66      * @param mdsalManager the mdsal manager instance.
  67      */
  68     public EgressAclServiceImpl(DataBroker dataBroker, IMdsalApiManager mdsalManager) {
  69         // Service mode is w.rt. switch
  70         super(ServiceModeIngress.class, dataBroker, mdsalManager);
  71     }
  72
  73     /**
  74      * Bind service.
  75      *
  76      * @param interfaceName the interface name
  77      */
  78     @Override
  79     protected void bindService(String interfaceName) {
  80         int flowPriority = AclConstants.EGRESS_ACL_DEFAULT_FLOW_PRIORITY;
  81
  82         int instructionKey = 0;
  83         List<Instruction> instructions = new ArrayList<>();
  84         instructions.add(MDSALUtil.buildAndGetGotoTableInstruction(NwConstants.INGRESS_ACL_TABLE, ++instructionKey));
  85         short serviceIndex = ServiceIndex.getIndex(NwConstants.ACL_SERVICE_NAME, NwConstants.ACL_SERVICE_INDEX);
  86         BoundServices serviceInfo =
  87                 AclServiceUtils.getBoundServices(String.format("%s.%s.%s", "vpn", "egressacl", interfaceName),
  88                 serviceIndex, flowPriority, AclConstants.COOKIE_ACL_BASE, instructions);
  89         InstanceIdentifier<BoundServices> path =
  90                 AclServiceUtils.buildServiceId(interfaceName, serviceIndex, ServiceModeIngress.class);
  91         MDSALUtil.syncWrite(dataBroker, LogicalDatastoreType.CONFIGURATION, path, serviceInfo);
  92     }
  93
  94     /**
  95      * Unbind service.
  96      *
  97      * @param interfaceName the interface name
  98      */
  99     @Override
 100     protected void unbindService(String interfaceName) {
 101         InstanceIdentifier<BoundServices> path =
 102                 AclServiceUtils.buildServiceId(interfaceName,
 103                         ServiceIndex.getIndex(NwConstants.ACL_SERVICE_NAME, NwConstants.ACL_SERVICE_INDEX),
 104                         ServiceModeIngress.class);
 105         MDSALUtil.syncDelete(dataBroker, LogicalDatastoreType.CONFIGURATION, path);
 106     }
 107
 108     /**
 109      * Program conntrack rules.
 110      *
 111      * @param dpid the dpid
 112      * @param dhcpMacAddress the dhcp mac address.
 113      * @param allowedAddresses the allowed addresses
 114      * @param lportTag the lport tag
 115      * @param addOrRemove addorRemove
 116      */
 117     @Override
 118     protected void programSpecificFixedRules(BigInteger dpid, String dhcpMacAddress,
 119             List<AllowedAddressPairs> allowedAddresses, int lportTag, String portId, Action action, int addOrRemove) {
 120         programEgressAclFixedConntrackRule(dpid, allowedAddresses, lportTag, portId, action, addOrRemove);
 121     }
 122
 123     @Override
 124     protected void programGeneralFixedRules(BigInteger dpid, String dhcpMacAddress,
 125             List<AllowedAddressPairs> allowedAddresses, int lportTag, Action action, int addOrRemove) {
 126         LOG.info("programFixedRules :  adding default rules.");
 127
 128         if (action == Action.ADD || action == Action.REMOVE) {
 129             egressAclDhcpAllowClientTraffic(dpid, dhcpMacAddress, lportTag, addOrRemove);
 130             egressAclDhcpv6AllowClientTraffic(dpid, dhcpMacAddress, lportTag, addOrRemove);
 131             egressAclDhcpDropServerTraffic(dpid, dhcpMacAddress, lportTag, addOrRemove);
 132             egressAclDhcpv6DropServerTraffic(dpid, dhcpMacAddress, lportTag, addOrRemove);
 133             egressAclIcmpv6AllowAll(dpid, lportTag, addOrRemove);
 134             egressAclIcmpv6DropRouterAdvts(dpid, lportTag, addOrRemove);
 135         }
 136         programArpRule(dpid, allowedAddresses, lportTag, addOrRemove);
 137     }
 138
 139     @Override
 140     protected boolean programAclRules(List<Uuid> aclUuidList, BigInteger dpId, int lportTag, int addOrRemove, String
 141             portId) {
 142         LOG.trace("Applying custom rules DpId {}, lportTag {}", dpId, lportTag);
 143         for (Uuid sgUuid :aclUuidList ) {
 144             Acl acl = AclServiceUtils.getAcl(dataBroker, sgUuid.getValue());
 145             if (null == acl) {
 146                 LOG.warn("The ACL is empty");
 147                 continue;
 148             }
 149             AccessListEntries accessListEntries = acl.getAccessListEntries();
 150             List<Ace> aceList = accessListEntries.getAce();
 151             for (Ace ace: aceList) {
 152                 programAceRule(dpId, lportTag, addOrRemove, ace, portId, null);
 153             }
 154         }
 155         return true;
 156     }
 157
 158     @Override
 159     protected void programAceRule(BigInteger dpId, int lportTag, int addOrRemove, Ace ace, String portId,
 160                                   List<AllowedAddressPairs> syncAllowedAddresses) {
 161         SecurityRuleAttr aceAttr = AclServiceUtils.getAccesssListAttributes(ace);
 162         if (!aceAttr.getDirection().equals(DirectionEgress.class)) {
 163             return;
 164         }
 165         Matches matches = ace.getMatches();
 166         AceType aceType = matches.getAceType();
 167         Map<String,List<MatchInfoBase>> flowMap = null;
 168         if (aceType instanceof AceIp) {
 169             flowMap = AclServiceOFFlowBuilder.programIpFlow(matches);
 170             if (syncAllowedAddresses != null) {
 171                 flowMap = AclServiceUtils.getFlowForAllowedAddresses(syncAllowedAddresses, flowMap, false);
 172             } else if (aceAttr.getRemoteGroupId() != null) {
 173                 flowMap = AclServiceUtils.getFlowForRemoteAcl(aceAttr.getRemoteGroupId(), portId, flowMap,
 174                     false);
 175             }
 176         }
 177         if (null == flowMap) {
 178             LOG.error("Failed to apply ACL {} lportTag {}", ace.getKey(), lportTag);
 179             return;
 180         }
 181         //The flow map contains list of flows if port range is selected.
 182         for ( String  flowName : flowMap.keySet()) {
 183             List<MatchInfoBase> flows = flowMap.get(flowName);
 184             flowName += "Egress" + lportTag + ace.getKey().getRuleName();
 185             flows.add(AclServiceUtils.buildLPortTagMatch(lportTag));
 186             flows.add(new NxMatchInfo(NxMatchFieldType.ct_state,
 187                 new long[] {AclConstants.TRACKED_NEW_CT_STATE, AclConstants.TRACKED_NEW_CT_STATE_MASK}));
 188
 189             Long elanId = AclServiceUtils.getElanIdFromInterface(portId, dataBroker);
 190             List<ActionInfo> actionsInfos = new ArrayList<>();
 191             actionsInfos.add(new ActionInfo(ActionType.nx_conntrack,
 192                 new String[] {"1", "0", elanId.toString(), "255"}, 2));
 193             List<InstructionInfo> instructions = getDispatcherTableResubmitInstructions(actionsInfos);
 194
 195             syncFlow(dpId, NwConstants.INGRESS_ACL_FILTER_TABLE, flowName, AclConstants.PROTO_MATCH_PRIORITY,
 196                 "ACL", 0, 0, AclConstants.COOKIE_ACL_BASE, flows, instructions, addOrRemove);
 197         }
 198     }
 199
 200     /**
 201      * Anti-spoofing rule to block the Ipv4 DHCP server traffic from the port.
 202      *
 203      * @param dpId the dpId
 204      * @param dhcpMacAddress the Dhcp mac address
 205      * @param lportTag the lport tag
 206      * @param addOrRemove add/remove the flow.
 207      */
 208     protected void egressAclDhcpDropServerTraffic(BigInteger dpId, String dhcpMacAddress, int lportTag,
 209             int addOrRemove) {
 210         List<MatchInfoBase> matches = AclServiceUtils.buildDhcpMatches(AclConstants.DHCP_SERVER_PORT_IPV4,
 211                 AclConstants.DHCP_CLIENT_PORT_IPV4, lportTag);
 212
 213         List<InstructionInfo> instructions = new ArrayList<>();
 214         List<ActionInfo> actionsInfos = new ArrayList<>();
 215         actionsInfos.add(new ActionInfo(ActionType.drop_action, new String[] {}));
 216         String flowName = "Egress_DHCP_Server_v4" + dpId + "_" + lportTag + "_" + dhcpMacAddress + "_Drop_";
 217         syncFlow(dpId, NwConstants.INGRESS_ACL_TABLE, flowName,
 218                 AclConstants.PROTO_DHCP_CLIENT_TRAFFIC_MATCH_PRIORITY, "ACL", 0,
 219                 0, AclConstants.COOKIE_ACL_BASE, matches, instructions, addOrRemove);
 220     }
 221
 222     /**
 223      * Anti-spoofing rule to block the Ipv6 DHCP server traffic from the port.
 224      *
 225      * @param dpId the dpId
 226      * @param dhcpMacAddress the Dhcp mac address
 227      * @param lportTag the lport tag
 228      * @param addOrRemove add/remove the flow.
 229      */
 230     protected void egressAclDhcpv6DropServerTraffic(BigInteger dpId, String dhcpMacAddress, int lportTag,
 231             int addOrRemove) {
 232         List<MatchInfoBase> matches = AclServiceUtils.buildDhcpV6Matches(AclConstants.DHCP_SERVER_PORT_IPV6,
 233                 AclConstants.DHCP_CLIENT_PORT_IPV6, lportTag);
 234
 235         List<InstructionInfo> instructions = new ArrayList<>();
 236         List<ActionInfo> actionsInfos = new ArrayList<>();
 237         actionsInfos.add(new ActionInfo(ActionType.drop_action, new String[] {}));
 238         String flowName = "Egress_DHCP_Server_v6" + "_" + dpId + "_" + lportTag + "_" + dhcpMacAddress + "_Drop_";
 239         syncFlow(dpId, NwConstants.INGRESS_ACL_TABLE, flowName,
 240                 AclConstants.PROTO_DHCP_CLIENT_TRAFFIC_MATCH_PRIORITY, "ACL", 0,
 241                 0, AclConstants.COOKIE_ACL_BASE, matches, instructions, addOrRemove);
 242     }
 243
 244     /**
 245      * Add rule to allow all ICMPv6 traffic from the VM port.
 246      *
 247      * @param dpId the dpId
 248      * @param lportTag the lport tag
 249      * @param addOrRemove add/remove the flow.
 250      */
 251     private void egressAclIcmpv6AllowAll(BigInteger dpId, int lportTag, int addOrRemove) {
 252         final List<MatchInfoBase> matches = AclServiceUtils.buildIcmpV6Matches(0, 0, lportTag);
 253
 254         List<ActionInfo> actionsInfos = new ArrayList<>();
 255         List<InstructionInfo> instructions = getDispatcherTableResubmitInstructions(actionsInfos);
 256
 257         String flowName = "Egress_ICMPv6_ALL" + dpId + "_" + lportTag + "_Permit_";
 258         syncFlow(dpId, NwConstants.INGRESS_ACL_TABLE, flowName, AclConstants.PROTO_IPV6_ALLOWED_PRIORITY,
 259                 "ACL", 0, 0, AclConstants.COOKIE_ACL_BASE, matches, instructions, addOrRemove);
 260     }
 261
 262     /**
 263      * Anti-spoofing rule to block the Ipv6 Router Advts from the VM port.
 264      *
 265      * @param dpId the dpId
 266      * @param lportTag the lport tag
 267      * @param addOrRemove add/remove the flow.
 268      */
 269     private void egressAclIcmpv6DropRouterAdvts(BigInteger dpId, int lportTag, int addOrRemove) {
 270         List<MatchInfoBase> matches = AclServiceUtils.buildIcmpV6Matches(AclConstants.ICMPV6_TYPE_RA, 0, lportTag);
 271
 272         List<InstructionInfo> instructions = new ArrayList<>();
 273         List<ActionInfo> actionsInfos = new ArrayList<>();
 274         actionsInfos.add(new ActionInfo(ActionType.drop_action, new String[] {}));
 275         String flowName = "Egress_ICMPv6" + "_" + dpId + "_" + lportTag + "_" + AclConstants.ICMPV6_TYPE_RA + "_Drop_";
 276         syncFlow(dpId, NwConstants.INGRESS_ACL_TABLE, flowName, AclConstants.PROTO_IPV6_DROP_PRIORITY, "ACL", 0,
 277                 0, AclConstants.COOKIE_ACL_BASE, matches, instructions, addOrRemove);
 278     }
 279
 280     /**
 281      * Add rule to ensure only DHCP server traffic from the specified mac is
 282      * allowed.
 283      *
 284      * @param dpId the dpid
 285      * @param dhcpMacAddress the DHCP server mac address
 286      * @param lportTag the lport tag
 287      * @param addOrRemove whether to add or remove the flow
 288      */
 289     private void egressAclDhcpAllowClientTraffic(BigInteger dpId, String dhcpMacAddress, int lportTag,
 290             int addOrRemove) {
 291         final List<MatchInfoBase> matches = AclServiceUtils.buildDhcpMatches(AclConstants.DHCP_CLIENT_PORT_IPV4,
 292                 AclConstants.DHCP_SERVER_PORT_IPV4, lportTag);
 293
 294         List<ActionInfo> actionsInfos = new ArrayList<>();
 295         List<InstructionInfo> instructions = getDispatcherTableResubmitInstructions(actionsInfos);
 296
 297         String flowName = "Egress_DHCP_Client_v4" + dpId + "_" + lportTag + "_" + dhcpMacAddress + "_Permit_";
 298         syncFlow(dpId, NwConstants.INGRESS_ACL_TABLE, flowName, AclConstants.PROTO_DHCP_CLIENT_TRAFFIC_MATCH_PRIORITY,
 299             "ACL", 0, 0, AclConstants.COOKIE_ACL_BASE, matches, instructions, addOrRemove);
 300     }
 301
 302     /**
 303      * Add rule to ensure only DHCPv6 server traffic from the specified mac is
 304      * allowed.
 305      *
 306      * @param dpId the dpid
 307      * @param dhcpMacAddress the DHCP server mac address
 308      * @param lportTag the lport tag
 309      * @param addOrRemove whether to add or remove the flow
 310      */
 311     private void egressAclDhcpv6AllowClientTraffic(BigInteger dpId, String dhcpMacAddress, int lportTag,
 312             int addOrRemove) {
 313         final List<MatchInfoBase> matches = AclServiceUtils.buildDhcpV6Matches(AclConstants.DHCP_CLIENT_PORT_IPV6,
 314                 AclConstants.DHCP_SERVER_PORT_IPV6, lportTag);
 315
 316         List<ActionInfo> actionsInfos = new ArrayList<>();
 317         List<InstructionInfo> instructions = getDispatcherTableResubmitInstructions(actionsInfos);
 318
 319         String flowName = "Egress_DHCP_Client_v6" + "_" + dpId + "_" + lportTag + "_" + dhcpMacAddress + "_Permit_";
 320         syncFlow(dpId, NwConstants.INGRESS_ACL_TABLE, flowName, AclConstants.PROTO_DHCP_CLIENT_TRAFFIC_MATCH_PRIORITY,
 321             "ACL", 0, 0, AclConstants.COOKIE_ACL_BASE, matches, instructions, addOrRemove);
 322     }
 323
 324     /**
 325      * Adds the rule to send the packet to the netfilter to check whether it is
 326      * a known packet.
 327      *
 328      * @param dpId the dpId
 329      * @param allowedAddresses the allowed addresses
 330      * @param priority the priority of the flow
 331      * @param flowId the flowId
 332      * @param conntrackState the conntrack state of the packets thats should be
 333      *        send
 334      * @param conntrackMask the conntrack mask
 335      * @param portId the portId
 336      * @param addOrRemove whether to add or remove the flow
 337      */
 338     private void programConntrackRecircRules(BigInteger dpId, List<AllowedAddressPairs> allowedAddresses,
 339             Integer priority, String flowId, int conntrackState, int conntrackMask, String portId, int addOrRemove) {
 340         for (AllowedAddressPairs allowedAddress : allowedAddresses) {
 341             IpPrefixOrAddress attachIp = allowedAddress.getIpAddress();
 342             String attachMac = allowedAddress.getMacAddress().getValue();
 343
 344             List<MatchInfoBase> matches = new ArrayList<>();
 345             matches.add(new MatchInfo(MatchFieldType.eth_type, new long[] {NwConstants.ETHTYPE_IPV4}));
 346             matches.add(new NxMatchInfo(NxMatchFieldType.ct_state, new long[] {conntrackState, conntrackMask}));
 347             matches.add(new MatchInfo(MatchFieldType.eth_src, new String[] {attachMac}));
 348             matches.addAll(AclServiceUtils.buildIpMatches(attachIp, MatchFieldType.ipv4_source));
 349
 350             Long elanTag = AclServiceUtils.getElanIdFromInterface(portId, dataBroker);
 351             List<InstructionInfo> instructions = new ArrayList<>();
 352             List<ActionInfo> actionsInfos = new ArrayList<>();
 353             actionsInfos.add(new ActionInfo(ActionType.nx_conntrack,
 354                     new String[] {"0", "0", elanTag.toString(), Short.toString(
 355                         NwConstants.INGRESS_ACL_FILTER_TABLE)}, 2));
 356             instructions.add(new InstructionInfo(InstructionType.apply_actions, actionsInfos));
 357
 358             String flowName = "Egress_Fixed_Conntrk_Untrk_" + dpId + "_" + attachMac + "_"
 359                     + String.valueOf(attachIp.getValue()) + "_" + flowId;
 360             syncFlow(dpId, NwConstants.INGRESS_ACL_TABLE, flowName, AclConstants.PROTO_MATCH_PRIORITY, "ACL", 0, 0,
 361                     AclConstants.COOKIE_ACL_BASE, matches, instructions, addOrRemove);
 362         }
 363     }
 364
 365     /**
 366      * Adds the rule to allow arp packets.
 367      *
 368      * @param dpId the dpId
 369      * @param allowedAddresses the allowed addresses
 370      * @param lportTag the lport tag
 371      * @param addOrRemove whether to add or remove the flow
 372      */
 373     protected void programArpRule(BigInteger dpId, List<AllowedAddressPairs> allowedAddresses, int lportTag,
 374             int addOrRemove) {
 375         for (AllowedAddressPairs allowedAddress : allowedAddresses) {
 376             String attachMac = allowedAddress.getMacAddress().getValue();
 377             List<MatchInfo> matches = new ArrayList<>();
 378             matches.add(new MatchInfo(MatchFieldType.eth_type, new long[] {NwConstants.ETHTYPE_ARP}));
 379             matches.add(new MatchInfo(MatchFieldType.arp_sha, new String[] {attachMac}));
 380             matches.add(AclServiceUtils.buildLPortTagMatch(lportTag));
 381
 382             List<InstructionInfo> instructions = getDispatcherTableResubmitInstructions(new ArrayList<>());
 383
 384             String flowName = "Egress_ARP_" + dpId + "_" + attachMac;
 385             syncFlow(dpId, NwConstants.INGRESS_ACL_TABLE, flowName,
 386                     AclConstants.PROTO_ARP_TRAFFIC_MATCH_PRIORITY, "ACL", 0, 0,
 387                     AclConstants.COOKIE_ACL_BASE, matches, instructions, addOrRemove);
 388         }
 389     }
 390
 391     /**
 392      * Programs the default connection tracking rules.
 393      *
 394      * @param dpid the dp id
 395      * @param allowedAddresses the allowed addresses
 396      * @param lportTag the lport tag
 397      * @param portId the portId
 398      * @param action the action
 399      * @param write whether to add or remove the flow.
 400      */
 401     private void programEgressAclFixedConntrackRule(BigInteger dpid, List<AllowedAddressPairs> allowedAddresses,
 402             int lportTag, String portId, Action action, int write) {
 403         programConntrackRecircRules(dpid, allowedAddresses, AclConstants.CT_STATE_UNTRACKED_PRIORITY,
 404             "Untracked",AclConstants.UNTRACKED_CT_STATE,AclConstants.UNTRACKED_CT_STATE_MASK, portId, write );
 405         LOG.info("programEgressAclFixedConntrackRule :  default connection tracking rule are added.");
 406     }
 407 }