vpnservice/aclservice/impl/src/main/java/org/opendaylight/netvirt/aclservice/EgressAclServiceImpl.java

   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
  15 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  16 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  17 import org.opendaylight.genius.mdsalutil.ActionInfo;
  18 import org.opendaylight.genius.mdsalutil.ActionType;
  19 import org.opendaylight.genius.mdsalutil.InstructionInfo;
  20 import org.opendaylight.genius.mdsalutil.InstructionType;
  21 import org.opendaylight.genius.mdsalutil.MDSALUtil;
  22 import org.opendaylight.genius.mdsalutil.MatchFieldType;
  23 import org.opendaylight.genius.mdsalutil.MatchInfo;
  24 import org.opendaylight.genius.mdsalutil.MatchInfoBase;
  25 import org.opendaylight.genius.mdsalutil.NwConstants;
  26 import org.opendaylight.genius.mdsalutil.NxMatchFieldType;
  27 import org.opendaylight.genius.mdsalutil.NxMatchInfo;
  28 import org.opendaylight.genius.mdsalutil.interfaces.IMdsalApiManager;
  29 import org.opendaylight.netvirt.aclservice.utils.AclConstants;
  30 import org.opendaylight.netvirt.aclservice.utils.AclServiceOFFlowBuilder;
  31 import org.opendaylight.netvirt.aclservice.utils.AclServiceUtils;
  32 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160218.access.lists.Acl;
  33 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160218.access.lists.acl.AccessListEntries;
  34 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.access.control.list.rev160218.access.lists.acl.access.list.entries.Ace;
  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.Matches;
  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.AceType;
  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.ace.type.AceIp;
  38 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Uuid;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.list.Instruction;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.rpcs.rev160406.OdlInterfaceRpcService;
  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.yangtools.yang.binding.InstanceIdentifier;
  47 import org.slf4j.Logger;
  48 import org.slf4j.LoggerFactory;
  49
  50 public class EgressAclServiceImpl extends AbstractAclServiceImpl {
  51
  52     private static final Logger LOG = LoggerFactory.getLogger(EgressAclServiceImpl.class);
  53     private final DataBroker dataBroker;
  54
  55     /**
  56      * Initialize the member variables.
  57      * @param dataBroker the data broker instance.
  58      * @param interfaceManager the interface manager instance.
  59      * @param mdsalManager the mdsal manager instance.
  60      */
  61     public EgressAclServiceImpl(DataBroker dataBroker, OdlInterfaceRpcService interfaceManager,
  62                                 IMdsalApiManager mdsalManager) {
  63         super(dataBroker,interfaceManager,mdsalManager);
  64         this.dataBroker = dataBroker;
  65     }
  66
  67     /**
  68      * Bind service.
  69      *
  70      * @param interfaceName the interface name
  71      */
  72     protected void bindService(String interfaceName) {
  73         int flowPriority = AclConstants.EGRESS_ACL_DEFAULT_FLOW_PRIORITY;
  74
  75         int instructionKey = 0;
  76         List<Instruction> instructions = new ArrayList<>();
  77         instructions.add(MDSALUtil.buildAndGetGotoTableInstruction(AclConstants.EGRESS_ACL_TABLE_ID, ++instructionKey));
  78         BoundServices serviceInfo = AclServiceUtils.getBoundServices(
  79                 String.format("%s.%s.%s", "vpn", "egressacl", interfaceName), AclConstants.EGRESS_ACL_SERVICE_PRIORITY,
  80                 flowPriority, AclConstants.COOKIE_ACL_BASE, instructions);
  81         InstanceIdentifier<BoundServices> path = AclServiceUtils.buildServiceId(interfaceName,
  82                 AclConstants.EGRESS_ACL_SERVICE_PRIORITY, ServiceModeIngress.class);
  83         MDSALUtil.syncWrite(dataBroker, LogicalDatastoreType.CONFIGURATION, path, serviceInfo);
  84     }
  85
  86     /**
  87      * Unbind service.
  88      *
  89      * @param interfaceName the interface name
  90      */
  91     protected void unbindService(String interfaceName) {
  92         InstanceIdentifier<BoundServices> path = AclServiceUtils.buildServiceId(interfaceName,
  93                 AclConstants.EGRESS_ACL_SERVICE_PRIORITY, ServiceModeIngress.class);
  94         MDSALUtil.syncDelete(dataBroker, LogicalDatastoreType.CONFIGURATION, path);
  95     }
  96
  97     /**
  98      * Program the default anti-spoofing rule and the conntrack rules.
  99      *
 100      * @param dpid the dpid
 101      * @param dhcpMacAddress the dhcp mac address.
 102      * @param attachMac The vm mac address
 103      * @param addOrRemove addorRemove
 104      */
 105     protected void programFixedRules(BigInteger dpid, String dhcpMacAddress,
 106                                              String attachMac, int addOrRemove) {
 107         LOG.info("programFixedRules :  adding default rules.");
 108         egressAclDhcpAllowClientTraffic(dpid, dhcpMacAddress, attachMac, addOrRemove);
 109         egressAclDhcpv6AllowClientTraffic(dpid, dhcpMacAddress, attachMac, addOrRemove);
 110         egressAclDhcpDropServerTraffic(dpid, dhcpMacAddress, attachMac, addOrRemove);
 111         egressAclDhcpv6DropServerTraffic(dpid, dhcpMacAddress, attachMac, addOrRemove);
 112
 113         //if (securityServicesManager.isConntrackEnabled()) {
 114         programEgressAclFixedConntrackRule(dpid, attachMac, addOrRemove);
 115         //}
 116         programArpRule(dpid,attachMac, addOrRemove);
 117     }
 118
 119     /**
 120      * Programs the custom flows.
 121      *
 122      * @param aclUuidList the list of acl uuid to be applied
 123      * @param dpId the dpId
 124      * @param attachMac the attached mac
 125      * @param addOrRemove whether to delete or add flow
 126      */
 127     protected void programAclRules(List<Uuid> aclUuidList, BigInteger dpId, String attachMac,
 128                                    IpPrefixOrAddress attachIp, int addOrRemove) {
 129         LOG.trace("Applying custom rules DpId {}, vmMacAddress {}", dpId, attachMac );
 130         for (Uuid sgUuid :aclUuidList ) {
 131             Acl acl = AclServiceUtils.getAcl(dataBroker, sgUuid.getValue());
 132             AccessListEntries accessListEntries = acl.getAccessListEntries();
 133             List<Ace> aceList = accessListEntries.getAce();
 134             for (Ace ace: aceList) {
 135                 programAceRule(dpId, attachMac, attachIp, addOrRemove, ace);
 136             }
 137         }
 138
 139     }
 140
 141     protected void programAceRule(BigInteger dpId, String attachMac, IpPrefixOrAddress attachIp, int addOrRemove,
 142                                   Ace ace) {
 143         SecurityRuleAttr aceAttr = AclServiceUtils.getAccesssListAttributes(ace);
 144         if (!aceAttr.getDirection().equals(DirectionEgress.class)) {
 145             return;
 146         }
 147         Matches matches = ace.getMatches();
 148         AceType aceType = matches.getAceType();
 149         Map<String,List<MatchInfoBase>> flowMap = null;
 150         if (aceType instanceof AceIp) {
 151             flowMap = AclServiceOFFlowBuilder.programIpFlow(matches);
 152         }
 153         if (null == flowMap) {
 154             LOG.error("Failed to apply ACL {} vmMacAddress {}", ace.getKey(), attachMac);
 155             return;
 156         }
 157         //The flow map contains list of flows if port range is selected.
 158         for ( String  flowName : flowMap.keySet()) {
 159             List<MatchInfoBase> flows = flowMap.get(flowName);
 160             flowName += "Egress" + attachMac + String.valueOf(attachIp.getValue()) + ace.getKey().getRuleName();
 161             flows .add(new MatchInfo(MatchFieldType.eth_src,
 162                 new String[] { attachMac }));
 163             flows.addAll(AclServiceUtils.getAllowedIpMatches(attachIp, MatchFieldType.ipv4_source));
 164             List<InstructionInfo> instructions = new ArrayList<>();
 165             List<ActionInfo> actionsInfos = new ArrayList<>();
 166             actionsInfos.add(new ActionInfo(ActionType.nx_conntrack,
 167                 new String[] {"1", "0", "0", "255"}, 2));
 168             instructions.add(new InstructionInfo(InstructionType.apply_actions,
 169                 actionsInfos));
 170             instructions.add(new InstructionInfo(InstructionType.goto_table,
 171                 new long[] { AclConstants.EGRESS_ACL_NEXT_TABLE_ID }));
 172             syncFlow(dpId, AclConstants.EGRESS_ACL_TABLE_ID, flowName, AclConstants.PROTO_MATCH_PRIORITY,
 173                 "ACL", 0, 0, AclConstants.COOKIE_ACL_BASE, flows, instructions, addOrRemove);
 174         }
 175     }
 176
 177     /**
 178      * Anti-spoofing rule to block the Ipv4 DHCP server traffic from the port.
 179      * @param dpId the dpId
 180      * @param dhcpMacAddress the Dhcp mac address
 181      * @param attachMac the attached mac address
 182      * @param addOrRemove add/remove the flow.
 183      */
 184     private void egressAclDhcpDropServerTraffic(BigInteger dpId, String dhcpMacAddress,
 185             String attachMac, int addOrRemove) {
 186         List<MatchInfoBase> matches = AclServiceUtils.buildDhcpSourceMatches(AclConstants.DHCP_SERVER_PORT_IPV4,
 187                 AclConstants.DHCP_CLIENT_PORT_IPV4, attachMac);
 188
 189         List<InstructionInfo> instructions = new ArrayList<>();
 190
 191         List<ActionInfo> actionsInfos = new ArrayList<>();
 192
 193         actionsInfos.add(new ActionInfo(ActionType.drop_action,
 194             new String[] {}));
 195         String flowName = "Egress_DHCP_Server_v4" + dpId + "_" + attachMac + "_" + dhcpMacAddress + "_Drop_";
 196         syncFlow(dpId, AclConstants.EGRESS_ACL_TABLE_ID, flowName, AclConstants.PROTO_MATCH_PRIORITY, "ACL", 0, 0,
 197                 AclConstants.COOKIE_ACL_BASE, matches, instructions, addOrRemove);
 198     }
 199
 200     /**
 201      * Anti-spoofing rule to block the Ipv6 DHCP server traffic from the port.
 202      * @param dpId the dpId
 203      * @param dhcpMacAddress the Dhcp mac address
 204      * @param attachMac the attached mac address
 205      * @param addOrRemove add/remove the flow.
 206      */
 207     private void egressAclDhcpv6DropServerTraffic(BigInteger dpId, String dhcpMacAddress,
 208                                                   String attachMac, int addOrRemove) {
 209         List<MatchInfoBase> matches = AclServiceUtils.buildDhcpSourceMatches(AclConstants.DHCP_SERVER_PORT_IPV6,
 210                 AclConstants.DHCP_CLIENT_PORT_IPV6, attachMac);
 211
 212         List<InstructionInfo> instructions = new ArrayList<>();
 213
 214         List<ActionInfo> actionsInfos = new ArrayList<>();
 215
 216         actionsInfos.add(new ActionInfo(ActionType.drop_action,
 217             new String[] {}));
 218         String flowName = "Egress_DHCP_Server_v6" + "_" + dpId + "_" + attachMac + "_" + dhcpMacAddress + "_Drop_";
 219         syncFlow(dpId, AclConstants.EGRESS_ACL_TABLE_ID, flowName, AclConstants.PROTO_MATCH_PRIORITY, "ACL", 0, 0,
 220                 AclConstants.COOKIE_ACL_BASE, matches, instructions, addOrRemove);
 221     }
 222
 223     /**
 224      * Add rule to ensure only DHCP server traffic from the specified mac is allowed.
 225      *
 226      * @param dpId the dpid
 227      * @param dhcpMacAddress the DHCP server mac address
 228      * @param attachMac the mac address of the port
 229      * @param addOrRemove whether to add or remove the flow
 230      */
 231     private void egressAclDhcpAllowClientTraffic(BigInteger dpId, String dhcpMacAddress,
 232                                                  String attachMac, int addOrRemove) {
 233         final List<MatchInfoBase> matches =
 234                 AclServiceUtils.buildDhcpSourceMatches(AclConstants.DHCP_CLIENT_PORT_IPV4,
 235                         AclConstants.DHCP_SERVER_PORT_IPV4, attachMac);
 236
 237         List<InstructionInfo> instructions = new ArrayList<>();
 238
 239         List<ActionInfo> actionsInfos = new ArrayList<>();
 240
 241         actionsInfos.add(new ActionInfo(ActionType.nx_conntrack,
 242             new String[] {"1", "0", "0", "255"}, 2));
 243         instructions.add(new InstructionInfo(InstructionType.apply_actions,
 244             actionsInfos));
 245
 246
 247         instructions.add(new InstructionInfo(InstructionType.goto_table,
 248             new long[] { AclConstants.EGRESS_ACL_NEXT_TABLE_ID }));
 249         String flowName = "Egress_DHCP_Client_v4" + dpId + "_" + attachMac + "_" + dhcpMacAddress + "_Permit_";
 250         syncFlow(dpId, AclConstants.EGRESS_ACL_TABLE_ID, flowName, AclConstants.PROTO_MATCH_PRIORITY, "ACL", 0, 0,
 251                 AclConstants.COOKIE_ACL_BASE, matches, instructions, addOrRemove);
 252     }
 253
 254     /**
 255      * Add rule to ensure only DHCPv6 server traffic from the specified mac is allowed.
 256      *
 257      * @param dpId the dpid
 258      * @param dhcpMacAddress the DHCP server mac address
 259      * @param attachMac the mac address of  the port
 260      * @param addOrRemove whether to add or remove the flow
 261      */
 262     private void egressAclDhcpv6AllowClientTraffic(BigInteger dpId, String dhcpMacAddress,
 263                                                    String attachMac, int addOrRemove) {
 264         final List<MatchInfoBase> matches =
 265                 AclServiceUtils.buildDhcpSourceMatches(AclConstants.DHCP_CLIENT_PORT_IPV6,
 266                         AclConstants.DHCP_SERVER_PORT_IPV6, attachMac);
 267
 268         List<InstructionInfo> instructions = new ArrayList<>();
 269
 270         List<ActionInfo> actionsInfos = new ArrayList<>();
 271
 272         actionsInfos.add(new ActionInfo(ActionType.nx_conntrack,
 273             new String[] {"1", "0", "0", "255"}, 2));
 274         instructions.add(new InstructionInfo(InstructionType.apply_actions,
 275             actionsInfos));
 276
 277         instructions.add(new InstructionInfo(InstructionType.goto_table,
 278             new long[] { AclConstants.EGRESS_ACL_NEXT_TABLE_ID }));
 279         String flowName = "Egress_DHCP_Client_v6" + "_" + dpId + "_" + attachMac + "_" + dhcpMacAddress + "_Permit_";
 280         syncFlow(dpId, AclConstants.EGRESS_ACL_TABLE_ID, flowName, AclConstants.PROTO_MATCH_PRIORITY, "ACL", 0, 0,
 281                 AclConstants.COOKIE_ACL_BASE, matches, instructions, addOrRemove);
 282     }
 283
 284     /**
 285      * Adds the rule to send the packet to the netfilter to check whether it is a known packet.
 286      * @param dpId the dpId
 287      * @param attachMac the attached mac address
 288      * @param priority the priority of the flow
 289      * @param flowId the flowId
 290      * @param conntrackState the conntrack state of the packets thats should be send
 291      * @param conntrackMask the conntrack mask
 292      * @param addOrRemove whether to add or remove the flow
 293      */
 294     private void programConntrackRecircRule(BigInteger dpId, String attachMac, Integer priority, String flowId,
 295                                              int conntrackState, int conntrackMask, int addOrRemove) {
 296         List<MatchInfoBase> matches = new ArrayList<>();
 297         matches.add(new MatchInfo(MatchFieldType.eth_type,
 298             new long[] { NwConstants.ETHTYPE_IPV4 }));
 299         matches.add(new NxMatchInfo(NxMatchFieldType.ct_state,
 300             new long[] {conntrackState, conntrackMask}));
 301         matches.add(new MatchInfo(MatchFieldType.eth_src,
 302             new String[] { attachMac }));
 303         List<InstructionInfo> instructions = new ArrayList<>();
 304
 305         List<ActionInfo> actionsInfos = new ArrayList<>();
 306
 307         actionsInfos.add(new ActionInfo(ActionType.nx_conntrack,
 308             new String[] {"0", "0", "0", Short.toString(AclConstants.EGRESS_ACL_TABLE_ID)}, 2));
 309         instructions.add(new InstructionInfo(InstructionType.apply_actions,
 310             actionsInfos));
 311         String flowName = "Egress_Fixed_Conntrk_Untrk_" + dpId + "_" + attachMac + "_" + flowId;
 312         syncFlow(dpId, AclConstants.EGRESS_ACL_TABLE_ID, flowName, AclConstants.PROTO_MATCH_PRIORITY, "ACL", 0, 0,
 313                 AclConstants.COOKIE_ACL_BASE, matches, instructions, addOrRemove);
 314     }
 315
 316     /**
 317      * Adds the rule to forward the packets known packets.
 318      * @param dpId the dpId
 319      * @param attachMac the attached mac address
 320      * @param priority the priority of the flow
 321      * @param flowId the flowId
 322      * @param conntrackState the conntrack state of the packets thats should be send
 323      * @param conntrackMask the conntrack mask
 324      * @param addOrRemove whether to add or remove the flow
 325      */
 326     private void programConntrackForwardRule(BigInteger dpId, String attachMac, Integer priority, String flowId,
 327                                              int conntrackState, int conntrackMask, int addOrRemove) {
 328         List<MatchInfoBase> matches = new ArrayList<>();
 329         matches.add(new MatchInfo(MatchFieldType.eth_type,
 330             new long[] { NwConstants.ETHTYPE_IPV4 }));
 331         matches.add(new NxMatchInfo(NxMatchFieldType.ct_state,
 332             new long[] {conntrackState, conntrackMask}));
 333         matches.add(new MatchInfo(MatchFieldType.eth_src,
 334             new String[] { attachMac }));
 335         List<InstructionInfo> instructions = new ArrayList<>();
 336
 337         List<ActionInfo> actionsInfos = new ArrayList<>();
 338
 339         actionsInfos.add(new ActionInfo(ActionType.goto_table,
 340             new String[] {}));
 341
 342         instructions.add(new InstructionInfo(InstructionType.goto_table,
 343             new long[] { AclConstants.EGRESS_ACL_NEXT_TABLE_ID }));
 344         String flowName = "Egress_Fixed_Conntrk_Untrk_" + dpId + "_" + attachMac + "_" + flowId;
 345         syncFlow(dpId, AclConstants.EGRESS_ACL_TABLE_ID, flowName, priority, "ACL", 0, 0,
 346                 AclConstants.COOKIE_ACL_BASE, matches, instructions, addOrRemove);
 347     }
 348
 349     /**
 350      * Adds  the rule to drop the unknown/invalid packets .
 351      * @param dpId the dpId
 352      * @param attachMac the attached mac address
 353      * @param priority the priority of the flow
 354      * @param flowId the flowId
 355      * @param conntrackState the conntrack state of the packets thats should be send
 356      * @param conntrackMask the conntrack mask
 357      * @param addOrRemove whether to add or remove the flow
 358      */
 359     private void programConntrackDropRule(BigInteger dpId, String attachMac, Integer priority, String flowId,
 360                                           int conntrackState, int conntrackMask, int addOrRemove) {
 361         List<MatchInfoBase> matches = new ArrayList<>();
 362         matches.add(new MatchInfo(MatchFieldType.eth_type,
 363             new long[] { NwConstants.ETHTYPE_IPV4 }));
 364         matches.add(new NxMatchInfo(NxMatchFieldType.ct_state,
 365             new long[] { conntrackState, conntrackMask}));
 366         matches.add(new MatchInfo(MatchFieldType.eth_src,
 367             new String[] { attachMac }));
 368         List<InstructionInfo> instructions = new ArrayList<>();
 369
 370         List<ActionInfo> actionsInfos = new ArrayList<>();
 371
 372         actionsInfos.add(new ActionInfo(ActionType.drop_action,
 373             new String[] {}));
 374         String flowName = "Egress_Fixed_Conntrk_NewDrop_" + dpId + "_" + attachMac + "_" + flowId;
 375         syncFlow(dpId, AclConstants.EGRESS_ACL_TABLE_ID, flowName, priority, "ACL", 0, 0,
 376                 AclConstants.COOKIE_ACL_BASE, matches, instructions, addOrRemove);
 377     }
 378
 379     /**
 380      * Adds  the rule to allow arp packets.
 381      * @param dpId the dpId
 382      * @param attachMac the attached mac address
 383      * @param addOrRemove whether to add or remove the flow
 384      */
 385     private void programArpRule(BigInteger dpId, String attachMac, int addOrRemove) {
 386         List<MatchInfo> matches = new ArrayList<>();
 387         matches.add(new MatchInfo(MatchFieldType.eth_type,
 388             new long[] { NwConstants.ETHTYPE_ARP }));
 389         matches.add(new MatchInfo(MatchFieldType.arp_sha,
 390             new String[] { attachMac }));
 391
 392         List<InstructionInfo> instructions = new ArrayList<>();
 393
 394         List<ActionInfo> actionsInfos = new ArrayList<>();
 395
 396         actionsInfos.add(new ActionInfo(ActionType.goto_table,
 397                 new String[] {}));
 398
 399         instructions.add(new InstructionInfo(InstructionType.goto_table,
 400             new long[] { AclConstants.EGRESS_ACL_NEXT_TABLE_ID }));
 401         String flowName = "Egress_ARP_" + dpId + "_" + attachMac ;
 402         syncFlow(dpId, AclConstants.EGRESS_ACL_TABLE_ID, flowName, AclConstants.PROTO_MATCH_PRIORITY, "ACL", 0, 0,
 403                 AclConstants.COOKIE_ACL_BASE, matches, instructions, addOrRemove);
 404     }
 405
 406     /**
 407      * Programs the default connection tracking rules.
 408      * @param dpid the dp id
 409      * @param attachMac the attached mac address
 410      * @param write whether to add or remove the flow.
 411      */
 412     private void programEgressAclFixedConntrackRule(BigInteger dpid, String attachMac, int write) {
 413         programConntrackRecircRule(dpid, attachMac,AclConstants.CT_STATE_UNTRACKED_PRIORITY,
 414             "Untracked",AclConstants.UNTRACKED_CT_STATE,AclConstants.UNTRACKED_CT_STATE_MASK, write );
 415         programConntrackForwardRule(dpid, attachMac, AclConstants.CT_STATE_TRACKED_EXIST_PRIORITY,
 416             "Tracked_Established", AclConstants.TRACKED_EST_CT_STATE, AclConstants.TRACKED_CT_STATE_MASK,
 417             write );
 418         programConntrackForwardRule(dpid, attachMac, AclConstants.CT_STATE_TRACKED_EXIST_PRIORITY,
 419             "Tracked_Related", AclConstants.TRACKED_REL_CT_STATE, AclConstants.TRACKED_CT_STATE_MASK, write );
 420         programConntrackDropRule(dpid, attachMac, AclConstants.CT_STATE_NEW_PRIORITY_DROP,
 421             "Tracked_New", AclConstants.TRACKED_NEW_CT_STATE, AclConstants.TRACKED_NEW_CT_STATE_MASK, write );
 422         programConntrackDropRule(dpid, attachMac, AclConstants.CT_STATE_NEW_PRIORITY_DROP,
 423             "Tracked_Invalid",AclConstants.TRACKED_INV_CT_STATE, AclConstants.TRACKED_INV_CT_STATE_MASK,
 424             write );
 425         LOG.info("programEgressAclFixedConntrackRule :  default connection tracking rule are added.");
 426     }
 427 }