First shot at Broadcom OFDPA 1.0 pipeline

Requires changes to the group description to accept groupId from callers.

Change-Id: Ic21dfe8ae7c246b7d3a6b00e8e5c986e1dc21fa0

@@ -260,6 +260,8 @@ public class BgpRouter {
                 .withFlag(ForwardingObjective.Flag.SPECIFIC);
 
         if (nextId == null) {
+            // Route withdraws are not specified with next hops. Generating
+            // dummy treatment as there is no equivalent nextId info.
             fwdBuilder.withTreatment(DefaultTrafficTreatment.builder().build());
         } else {
             fwdBuilder.nextStep(nextId);

@@ -21,11 +21,11 @@ package org.onosproject.core;
 public interface GroupId {
 
     /**
-     * Returns a group ID as short value.
+     * Returns a group ID as an integer value.
      * The method is not intended for use by application developers.
      * Return data type may change in the future release.
      *
-     * @return a group ID as short value
+     * @return a group ID as integer value
      */
     int id();
 }

@@ -36,7 +36,7 @@ public enum ObjectiveError {
     GROUPINSTALLATIONFAILED,
 
     /**
-     * The group was reported as installed but is not missing.
+     * The group was reported as installed but is missing.
      */
     GROUPMISSING,
 
@@ -46,6 +46,11 @@ public enum ObjectiveError {
     DEVICEMISSING,
 
     /**
+     * Incorrect Objective parameters passed in by the caller.
+     */
+    BADPARAMS,
+
+    /**
      * An unknown error occurred.
      */
     UNKNOWN

@@ -32,11 +32,17 @@ public class DefaultGroupDescription implements GroupDescription {
     private final GroupKey appCookie;
     private final ApplicationId appId;
     private final DeviceId deviceId;
+    private final Integer givenGroupId;
 
     /**
      * Constructor to be used by north bound applications.
      * NOTE: The caller of this subsystem MUST ensure the appCookie
-     * provided in this API is immutable
+     * provided in this API is immutable.
+     * NOTE: The caller may choose to pass in 'null' for the groupId. This is
+     * the typical case, where the caller allows the group subsystem to choose
+     * the groupId in a globally unique way. If the caller passes in the groupId,
+     * the caller MUST ensure that the id is globally unique (not just unique
+     * per device).
      *
      * @param deviceId device identifier
      * @param type type of the group
@@ -49,11 +55,13 @@ public class DefaultGroupDescription implements GroupDescription {
                                    GroupDescription.Type type,
                                    GroupBuckets buckets,
                                    GroupKey appCookie,
+                                   Integer groupId,
                                    ApplicationId appId) {
         this.type = checkNotNull(type);
         this.deviceId = checkNotNull(deviceId);
         this.buckets = checkNotNull(buckets);
         this.appCookie = appCookie;
+        this.givenGroupId = groupId;
         this.appId = appId;
     }
 
@@ -70,6 +78,7 @@ public class DefaultGroupDescription implements GroupDescription {
         this.buckets = groupDesc.buckets();
         this.appCookie = groupDesc.appCookie();
         this.appId = groupDesc.appId();
+        this.givenGroupId = groupDesc.givenGroupId();
     }
 
     /**
@@ -85,7 +94,7 @@ public class DefaultGroupDescription implements GroupDescription {
     public DefaultGroupDescription(DeviceId deviceId,
                                    GroupDescription.Type type,
                                    GroupBuckets buckets) {
-        this(deviceId, type, buckets, null, null);
+        this(deviceId, type, buckets, null, null, null);
     }
 
     /**
@@ -138,6 +147,17 @@ public class DefaultGroupDescription implements GroupDescription {
         return this.buckets;
     }
 
+    /**
+     * Returns groupId passed in by application.
+     *
+     * @return Integer group Id passed in by caller. May be null if caller passed
+     *                 in null during GroupDescription creation.
+     */
+    @Override
+    public Integer givenGroupId() {
+        return this.givenGroupId;
+    }
+
     @Override
     /*
      * The deviceId, type and buckets are used for hash.
@@ -177,6 +197,7 @@ public class DefaultGroupDescription implements GroupDescription {
                 .add("type", type)
                 .add("buckets", buckets)
                 .add("appId", appId)
+                .add("givenGroupId", givenGroupId)
                 .toString();
     }
 }
\ No newline at end of file

@@ -75,6 +75,14 @@ public interface GroupDescription {
     public GroupKey appCookie();
 
     /**
+     * Returns groupId passed in by caller.
+     *
+     * @return Integer group id passed in by caller. May be null if caller
+     *                 passed in null to let groupService determin the group id.
+     */
+    public Integer givenGroupId();
+
+    /**
      * Returns group buckets of a group.
      *
      * @return GroupBuckets immutable list of group bucket

@@ -177,6 +177,7 @@ public class GroupManagerTest {
                                                                     Group.Type.SELECT,
                                                                     groupBuckets,
                                                                     key,
+                                                                    null,
                                                                     appId);
         groupService.addGroup(newGroupDesc);
         internalProvider.validate(DID, null);
@@ -397,6 +398,7 @@ public class GroupManagerTest {
                 Group.Type.SELECT,
                 groupBuckets,
                 key,
+                null,
                 appId);
         groupService.addGroup(newGroupDesc);
 

@@ -430,8 +430,13 @@ public class DistributedGroupStore
             return;
         }
 
-        // Get a new group identifier
-        GroupId id = new DefaultGroupId(getFreeGroupIdValue(groupDesc.deviceId()));
+        GroupId id = null;
+        if (groupDesc.givenGroupId() == null) {
+            // Get a new group identifier
+            id = new DefaultGroupId(getFreeGroupIdValue(groupDesc.deviceId()));
+        } else {
+            id = new DefaultGroupId(groupDesc.givenGroupId());
+        }
         // Create a group entry object
         StoredGroupEntry group = new DefaultGroup(id, groupDesc);
         // Insert the newly created group entry into key and id maps
@@ -513,6 +518,7 @@ public class DistributedGroupStore
                     oldGroup.type(),
                     updatedBuckets,
                     newCookie,
+                    oldGroup.givenGroupId(),
                     oldGroup.appId());
             StoredGroupEntry newGroup = new DefaultGroup(oldGroup.id(),
                                                          updatedGroupDesc);
@@ -718,6 +724,7 @@ public class DistributedGroupStore
                             group.type(),
                             group.buckets(),
                             group.appCookie(),
+                            group.givenGroupId(),
                             group.appId());
                     storeGroupDescriptionInternal(tmp);
                     getPendingGroupKeyTable().

@@ -275,8 +275,13 @@ public class SimpleGroupStore
             return;
         }
 
-        // Get a new group identifier
-        GroupId id = new DefaultGroupId(getFreeGroupIdValue(groupDesc.deviceId()));
+        GroupId id = null;
+        if (groupDesc.givenGroupId() == null) {
+            // Get a new group identifier
+            id = new DefaultGroupId(getFreeGroupIdValue(groupDesc.deviceId()));
+        } else {
+            id = new DefaultGroupId(groupDesc.givenGroupId());
+        }
         // Create a group entry object
         StoredGroupEntry group = new DefaultGroup(id, groupDesc);
         // Insert the newly created group entry into concurrent key and id maps
@@ -324,6 +329,7 @@ public class SimpleGroupStore
                                                         oldGroup.type(),
                                                         updatedBuckets,
                                                         newCookie,
+                                                        oldGroup.givenGroupId(),
                                                         oldGroup.appId());
             StoredGroupEntry newGroup = new DefaultGroup(oldGroup.id(),
                                                      updatedGroupDesc);
@@ -494,6 +500,7 @@ public class SimpleGroupStore
                                                                        group.type(),
                                                                        group.buckets(),
                                                                        group.appCookie(),
+                                                                       group.givenGroupId(),
                                                                        group.appId());
                     storeGroupDescriptionInternal(tmp);
                 }

@@ -224,6 +224,7 @@ public class SimpleGroupStoreTest {
                                                  Group.Type.SELECT,
                                                  groupBuckets,
                                                  key,
+                                                 null,
                                                  appId);
         InternalGroupStoreDelegate checkStoreGroupDelegate =
                 new InternalGroupStoreDelegate(key,
@@ -424,6 +425,7 @@ public class SimpleGroupStoreTest {
                 Group.Type.SELECT,
                 groupBuckets,
                 key,
+                null,
                 appId);
         InternalGroupStoreDelegate checkStoreGroupDelegate =
                 new InternalGroupStoreDelegate(key,

+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.driver.pipeline;
+
+import static org.onlab.util.Tools.groupedThreads;
+import static org.slf4j.LoggerFactory.getLogger;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
+
+import org.onlab.osgi.ServiceDirectory;
+import org.onlab.packet.Ethernet;
+import org.onlab.packet.VlanId;
+import org.onlab.util.KryoNamespace;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.core.CoreService;
+import org.onosproject.core.DefaultGroupId;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.behaviour.NextGroup;
+import org.onosproject.net.behaviour.Pipeliner;
+import org.onosproject.net.behaviour.PipelinerContext;
+import org.onosproject.net.driver.AbstractHandlerBehaviour;
+import org.onosproject.net.flow.DefaultFlowRule;
+import org.onosproject.net.flow.DefaultTrafficSelector;
+import org.onosproject.net.flow.DefaultTrafficTreatment;
+import org.onosproject.net.flow.FlowRule;
+import org.onosproject.net.flow.FlowRuleOperations;
+import org.onosproject.net.flow.FlowRuleOperationsContext;
+import org.onosproject.net.flow.FlowRuleService;
+import org.onosproject.net.flow.TrafficSelector;
+import org.onosproject.net.flow.TrafficTreatment;
+import org.onosproject.net.flow.criteria.Criteria;
+import org.onosproject.net.flow.criteria.Criterion;
+import org.onosproject.net.flow.criteria.EthCriterion;
+import org.onosproject.net.flow.criteria.EthTypeCriterion;
+import org.onosproject.net.flow.criteria.IPCriterion;
+import org.onosproject.net.flow.criteria.PortCriterion;
+import org.onosproject.net.flow.criteria.VlanIdCriterion;
+import org.onosproject.net.flow.instructions.Instruction;
+import org.onosproject.net.flow.instructions.Instructions.OutputInstruction;
+import org.onosproject.net.flow.instructions.L2ModificationInstruction;
+import org.onosproject.net.flow.instructions.L2ModificationInstruction.ModEtherInstruction;
+import org.onosproject.net.flow.instructions.L2ModificationInstruction.ModVlanIdInstruction;
+import org.onosproject.net.flowobjective.FilteringObjective;
+import org.onosproject.net.flowobjective.FlowObjectiveStore;
+import org.onosproject.net.flowobjective.ForwardingObjective;
+import org.onosproject.net.flowobjective.NextObjective;
+import org.onosproject.net.flowobjective.Objective;
+import org.onosproject.net.flowobjective.ObjectiveError;
+import org.onosproject.net.group.DefaultGroupBucket;
+import org.onosproject.net.group.DefaultGroupDescription;
+import org.onosproject.net.group.DefaultGroupKey;
+import org.onosproject.net.group.Group;
+import org.onosproject.net.group.GroupBucket;
+import org.onosproject.net.group.GroupBuckets;
+import org.onosproject.net.group.GroupDescription;
+import org.onosproject.net.group.GroupEvent;
+import org.onosproject.net.group.GroupKey;
+import org.onosproject.net.group.GroupListener;
+import org.onosproject.net.group.GroupService;
+import org.slf4j.Logger;
+
+import com.google.common.cache.Cache;
+import com.google.common.cache.CacheBuilder;
+import com.google.common.cache.RemovalCause;
+import com.google.common.cache.RemovalNotification;
+
+/**
+ * Driver for Broadcom's OF-DPA v1.0 TTP.
+ *
+ */
+public class OFDPA1Pipeline extends AbstractHandlerBehaviour implements Pipeliner {
+
+    protected static final int PORT_TABLE = 0;
+    protected static final int VLAN_TABLE = 10;
+    protected static final int TMAC_TABLE = 20;
+    protected static final int UNICAST_ROUTING_TABLE = 30;
+    protected static final int MULTICAST_ROUTING_TABLE = 40;
+    protected static final int BRIDGING_TABLE = 50;
+    protected static final int ACL_TABLE = 60;
+    protected static final int MAC_LEARNING_TABLE = 254;
+
+    @SuppressWarnings("unused")
+    private static final int HIGHEST_PRIORITY = 0xffff;
+    private static final int DEFAULT_PRIORITY = 0x8000;
+    private static final int LOWEST_PRIORITY = 0x0;
+
+    /*
+     * Group keys are normally generated by using the next Objective id. In the
+     * case of a next objective resulting in a group chain, each group derives a
+     * group key from the next objective id in the following way:
+     * The upper 4 bits of the group-key are used to denote the position of the
+     * group in the group chain. For example, in the chain
+     * group0 --> group1 --> group2 --> port
+     * group0's group key would have the upper 4 bits as 0, group1's upper four
+     * bits would be 1, and so on
+     */
+    private static final int GROUP0MASK = 0x0;
+    private static final int GROUP1MASK = 0x10000000;
+
+    /*
+     * OFDPA requires group-id's to have a certain form.
+     * L2 Interface Groups have <4bits-0><12bits-vlanid><16bits-portid>
+     * L3 Unicast Groups have <4bits-2><28bits-index>
+     */
+    private static final int L2INTERFACEMASK = 0x0;
+    private static final int L3UNICASTMASK = 0x20000000;
+
+    private final Logger log = getLogger(getClass());
+    private ServiceDirectory serviceDirectory;
+    private FlowRuleService flowRuleService;
+    private CoreService coreService;
+    private GroupService groupService;
+    private FlowObjectiveStore flowObjectiveStore;
+    private DeviceId deviceId;
+    private ApplicationId appId;
+
+    private KryoNamespace appKryo = new KryoNamespace.Builder()
+        .register(GroupKey.class)
+        .register(DefaultGroupKey.class)
+        .register(OfdpaGroupChain.class)
+        .register(byte[].class)
+        .build();
+
+    private Cache<GroupKey, OfdpaGroupChain> pendingNextObjectives;
+    private ConcurrentHashMap<GroupKey, GroupChainElem> pendingGroups;
+
+    private ScheduledExecutorService groupChecker =
+            Executors.newScheduledThreadPool(2, groupedThreads("onos/pipeliner",
+                                                               "ofdpa1-%d"));
+
+    @Override
+    public void init(DeviceId deviceId, PipelinerContext context) {
+        this.serviceDirectory = context.directory();
+        this.deviceId = deviceId;
+
+        pendingNextObjectives = CacheBuilder.newBuilder()
+                .expireAfterWrite(20, TimeUnit.SECONDS)
+                .removalListener((RemovalNotification<GroupKey, OfdpaGroupChain> notification) -> {
+                    if (notification.getCause() == RemovalCause.EXPIRED) {
+                        fail(notification.getValue().nextObjective(),
+                             ObjectiveError.GROUPINSTALLATIONFAILED);
+                    }
+                }).build();
+
+        groupChecker.scheduleAtFixedRate(new GroupChecker(), 0, 500, TimeUnit.MILLISECONDS);
+        pendingGroups = new ConcurrentHashMap<GroupKey, GroupChainElem>();
+
+        coreService = serviceDirectory.get(CoreService.class);
+        flowRuleService = serviceDirectory.get(FlowRuleService.class);
+        groupService = serviceDirectory.get(GroupService.class);
+        flowObjectiveStore = context.store();
+
+        groupService.addListener(new InnerGroupListener());
+
+        appId = coreService.registerApplication(
+                "org.onosproject.driver.OFDPA1Pipeline");
+
+        initializePipeline();
+
+    }
+
+    @Override
+    public void filter(FilteringObjective filteringObjective) {
+        if (filteringObjective.type() == FilteringObjective.Type.PERMIT) {
+            processFilter(filteringObjective,
+                          filteringObjective.op() == Objective.Operation.ADD,
+                          filteringObjective.appId());
+        } else {
+            fail(filteringObjective, ObjectiveError.UNSUPPORTED);
+        }
+    }
+
+    @Override
+    public void forward(ForwardingObjective fwd) {
+        Collection<FlowRule> rules;
+        FlowRuleOperations.Builder flowOpsBuilder = FlowRuleOperations.builder();
+
+        rules = processForward(fwd);
+        switch (fwd.op()) {
+            case ADD:
+                rules.stream()
+                        .filter(rule -> rule != null)
+                        .forEach(flowOpsBuilder::add);
+                break;
+            case REMOVE:
+                rules.stream()
+                        .filter(rule -> rule != null)
+                        .forEach(flowOpsBuilder::remove);
+                break;
+            default:
+                fail(fwd, ObjectiveError.UNKNOWN);
+                log.warn("Unknown forwarding type {}", fwd.op());
+        }
+
+
+        flowRuleService.apply(flowOpsBuilder.build(new FlowRuleOperationsContext() {
+            @Override
+            public void onSuccess(FlowRuleOperations ops) {
+                pass(fwd);
+            }
+
+            @Override
+            public void onError(FlowRuleOperations ops) {
+                fail(fwd, ObjectiveError.FLOWINSTALLATIONFAILED);
+            }
+        }));
+
+    }
+
+    @Override
+    public void next(NextObjective nextObjective) {
+        switch (nextObjective.type()) {
+        case SIMPLE:
+            Collection<TrafficTreatment> treatments = nextObjective.next();
+            if (treatments.size() != 1) {
+                log.error("Next Objectives of type Simple should only have a "
+                        + "single Traffic Treatment. Next Objective Id:{}", nextObjective.id());
+               fail(nextObjective, ObjectiveError.BADPARAMS);
+               return;
+            }
+            processSimpleNextObjective(nextObjective);
+            break;
+        case HASHED:
+        case BROADCAST:
+        case FAILOVER:
+            fail(nextObjective, ObjectiveError.UNSUPPORTED);
+            log.warn("Unsupported next objective type {}", nextObjective.type());
+            break;
+        default:
+            fail(nextObjective, ObjectiveError.UNKNOWN);
+            log.warn("Unknown next objective type {}", nextObjective.type());
+        }
+    }
+
+    /**
+     * As per OFDPA 1.0 TTP, filtering of VLAN ids, MAC addresses (for routing)
+     * and IP addresses configured on switch ports happen in different tables.
+     * Note that IP filtering rules need to be added to the ACL table, as there
+     * is no mechanism to send to controller via IP table.
+     *
+     * @param filt
+     * @param install
+     * @param applicationId
+     */
+    private void processFilter(FilteringObjective filt,
+                               boolean install, ApplicationId applicationId) {
+        // This driver only processes filtering criteria defined with switch
+        // ports as the key
+        PortCriterion p = null; EthCriterion e = null; VlanIdCriterion v = null;
+        Collection<IPCriterion> ips = new ArrayList<IPCriterion>();
+        if (!filt.key().equals(Criteria.dummy()) &&
+                filt.key().type() == Criterion.Type.IN_PORT) {
+            p = (PortCriterion) filt.key();
+        } else {
+            log.warn("No key defined in filtering objective from app: {}. Not"
+                    + "processing filtering objective", applicationId);
+            fail(filt, ObjectiveError.UNKNOWN);
+            return;
+        }
+        // convert filtering conditions for switch-intfs into flowrules
+        FlowRuleOperations.Builder ops = FlowRuleOperations.builder();
+        for (Criterion c : filt.conditions()) {
+            if (c.type() == Criterion.Type.ETH_DST) {
+                e = (EthCriterion) c;
+            } else if (c.type() == Criterion.Type.VLAN_VID) {
+                v = (VlanIdCriterion) c;
+            } else if (c.type() == Criterion.Type.IPV4_DST) {
+                ips.add((IPCriterion) c);
+            } else {
+                log.error("Unsupported filter {}", c);
+                fail(filt, ObjectiveError.UNSUPPORTED);
+                return;
+            }
+        }
+
+        log.debug("adding VLAN filtering rule in VLAN table: {}", e.mac());
+        TrafficSelector.Builder selector = DefaultTrafficSelector.builder();
+        TrafficTreatment.Builder treatment = DefaultTrafficTreatment.builder();
+        selector.matchInPort(p.port());
+        selector.matchVlanId(v.vlanId());
+        treatment.transition(TMAC_TABLE);
+        FlowRule rule = DefaultFlowRule.builder()
+                .forDevice(deviceId)
+                .withSelector(selector.build())
+                .withTreatment(treatment.build())
+                .withPriority(DEFAULT_PRIORITY)
+                .fromApp(appId)
+                .makePermanent()
+                .forTable(VLAN_TABLE).build();
+        ops =  ops.add(rule);
+
+        log.debug("adding MAC filtering rules in TMAC table: {}", e.mac());
+        selector = DefaultTrafficSelector.builder();
+        treatment = DefaultTrafficTreatment.builder();
+        selector.matchInPort(p.port());
+        selector.matchVlanId(v.vlanId());
+        selector.matchEthType(Ethernet.TYPE_IPV4);
+        selector.matchEthDst(e.mac());
+        treatment.transition(UNICAST_ROUTING_TABLE);
+        rule = DefaultFlowRule.builder()
+                .forDevice(deviceId)
+                .withSelector(selector.build())
+                .withTreatment(treatment.build())
+                .withPriority(DEFAULT_PRIORITY)
+                .fromApp(appId)
+                .makePermanent()
+                .forTable(TMAC_TABLE).build();
+        ops = ops.add(rule);
+
+        log.debug("adding IP filtering rules in ACL table");
+        for (IPCriterion ipaddr : ips) {
+            selector = DefaultTrafficSelector.builder();
+            treatment = DefaultTrafficTreatment.builder();
+            selector.matchEthType(Ethernet.TYPE_IPV4);
+            selector.matchIPDst(ipaddr.ip());
+            treatment.setOutput(PortNumber.CONTROLLER);
+            rule = DefaultFlowRule.builder()
+                    .forDevice(deviceId)
+                    .withSelector(selector.build())
+                    .withTreatment(treatment.build())
+                    .withPriority(DEFAULT_PRIORITY)
+                    .fromApp(appId)
+                    .makePermanent()
+                    .forTable(ACL_TABLE).build();
+            ops =  ops.add(rule);
+        }
+
+        ops = install ? ops.add(rule) : ops.remove(rule);
+        // apply filtering flow rules
+        flowRuleService.apply(ops.build(new FlowRuleOperationsContext() {
+            @Override
+            public void onSuccess(FlowRuleOperations ops) {
+                pass(filt);
+                log.info("Applied filtering rules");
+            }
+
+            @Override
+            public void onError(FlowRuleOperations ops) {
+                fail(filt, ObjectiveError.FLOWINSTALLATIONFAILED);
+                log.info("Failed to apply filtering rules");
+            }
+        }));
+
+    }
+
+
+    /**
+     * As per the OFDPA 1.0 TTP, packets are sent out of ports by using
+     * a chain of groups, namely an L3 Unicast Group that points to an L2 Interface
+     * Group which in turns points to an output port. The Next Objective passed
+     * in by the application has to be broken up into a group chain
+     * to satisfy this TTP.
+     *
+     * @param nextObj  the nextObjective of type SIMPLE
+     */
+    private void processSimpleNextObjective(NextObjective nextObj) {
+        // break up next objective to GroupChain objects
+        TrafficTreatment treatment = nextObj.next().iterator().next();
+        // for the l2interface group, get vlan and port info
+        // for the l3unicast group, get the src/dst mac and vlan info
+        TrafficTreatment.Builder l3utt = DefaultTrafficTreatment.builder();
+        TrafficTreatment.Builder l2itt = DefaultTrafficTreatment.builder();
+        VlanId vlanid = null;
+        long portNum = 0;
+        for (Instruction ins : treatment.allInstructions()) {
+            if (ins.type() == Instruction.Type.L2MODIFICATION) {
+                L2ModificationInstruction l2ins = (L2ModificationInstruction) ins;
+                switch (l2ins.subtype()) {
+                case ETH_DST:
+                    l3utt.setEthDst(((ModEtherInstruction) l2ins).mac());
+                    break;
+                case ETH_SRC:
+                    l3utt.setEthSrc(((ModEtherInstruction) l2ins).mac());
+                    break;
+                case VLAN_ID:
+                    vlanid = ((ModVlanIdInstruction) l2ins).vlanId();
+                    l3utt.setVlanId(vlanid);
+                    break;
+                case DEC_MPLS_TTL:
+                case MPLS_LABEL:
+                case MPLS_POP:
+                case MPLS_PUSH:
+                case VLAN_PCP:
+                case VLAN_POP:
+                case VLAN_PUSH:
+                default:
+                    break;
+                }
+            } else if (ins.type() == Instruction.Type.OUTPUT) {
+                portNum = ((OutputInstruction) ins).port().toLong();
+                l2itt.add(ins);
+            } else {
+                log.warn("Driver does not handle this type of TrafficTreatment"
+                        + " instruction in nextObjectives:  {}", ins.type());
+            }
+        }
+
+        // assemble information for ofdpa l2interface group
+        int l2gk = nextObj.id() | GROUP1MASK;
+        final GroupKey l2groupkey = new DefaultGroupKey(appKryo.serialize(l2gk));
+        Integer l2groupId = L2INTERFACEMASK | (vlanid.toShort() << 16) | (int) portNum;
+
+        // assemble information for ofdpa l3unicast group
+        int l3gk = nextObj.id() | GROUP0MASK;
+        final GroupKey l3groupkey = new DefaultGroupKey(appKryo.serialize(l3gk));
+        Integer l3groupId = L3UNICASTMASK | (int) portNum;
+        l3utt.group(new DefaultGroupId(l2groupId));
+        GroupChainElem gce = new GroupChainElem(l3groupkey, l3groupId,
+                                                l3utt.build(), nextObj.appId());
+
+        // create object for local and distributed storage
+        List<GroupKey> gkeys = new ArrayList<GroupKey>();
+        gkeys.add(l3groupkey); // group0 in chain
+        gkeys.add(l2groupkey); // group1 in chain
+        OfdpaGroupChain ofdpaGrp = new OfdpaGroupChain(gkeys, nextObj);
+
+        // store l2groupkey with the groupChainElem for the l3group that depends on it
+        pendingGroups.put(l2groupkey, gce);
+
+        // store l3groupkey with the ofdpaGroupChain for the nextObjective that depends on it
+        pendingNextObjectives.put(l3groupkey, ofdpaGrp);
+
+        // create group description for the ofdpa l2interfacegroup and send to groupservice
+        GroupBucket bucket =
+                DefaultGroupBucket.createIndirectGroupBucket(l2itt.build());
+        GroupDescription groupDescription = new DefaultGroupDescription(deviceId,
+                             GroupDescription.Type.INDIRECT,
+                             new GroupBuckets(Collections.singletonList(bucket)),
+                             l2groupkey,
+                             l2groupId,
+                             nextObj.appId());
+        groupService.addGroup(groupDescription);
+    }
+
+    /**
+     * Processes next element of a group chain. Assumption is that if this
+     * group points to another group, the latter has already been created
+     * and this driver has received notification for it. A second assumption is
+     * that if there is another group waiting for this group then the appropriate
+     * stores already have the information to act upon the notification for the
+     * creating of this group.
+     *
+     * @param gce the group chain element to be processed next
+     */
+    private void processGroupChain(GroupChainElem gce) {
+        GroupBucket bucket = DefaultGroupBucket
+                .createIndirectGroupBucket(gce.getBucketActions());
+        GroupDescription groupDesc = new DefaultGroupDescription(deviceId,
+                             GroupDescription.Type.INDIRECT,
+                             new GroupBuckets(Collections.singletonList(bucket)),
+                             gce.getGkey(),
+                             gce.getGivenGroupId(),
+                             gce.getAppId());
+        groupService.addGroup(groupDesc);
+    }
+
+    private Collection<FlowRule> processForward(ForwardingObjective fwd) {
+        switch (fwd.flag()) {
+            case SPECIFIC:
+                return processSpecific(fwd);
+            case VERSATILE:
+                return processVersatile(fwd);
+            default:
+                fail(fwd, ObjectiveError.UNKNOWN);
+                log.warn("Unknown forwarding flag {}", fwd.flag());
+        }
+        return Collections.emptySet();
+    }
+
+    /**
+     * In the OF-DPA 1.0 pipeline, versatile forwarding objectives go to the
+     * ACL table.
+     * @param fwd  the forwarding objective of type 'versatile'
+     * @return     a collection of flow rules to be sent to the switch. An empty
+     *             collection may be returned if there is a problem in processing
+     *             the flow rule
+     */
+    private Collection<FlowRule> processVersatile(ForwardingObjective fwd) {
+        log.info("Processing versatile forwarding objective");
+        TrafficSelector selector = fwd.selector();
+
+        EthTypeCriterion ethType =
+                (EthTypeCriterion) selector.getCriterion(Criterion.Type.ETH_TYPE);
+        if (ethType == null) {
+            log.error("Versatile forwarding objective must include ethType");
+            fail(fwd, ObjectiveError.UNKNOWN);
+            return Collections.emptySet();
+        }
+        if (ethType.ethType() == Ethernet.TYPE_ARP) {
+            log.warn("Installing ARP rule to table 60");
+
+            // currently need to punt from ACL table should use:
+            // OF apply-actions-instruction
+            // To use OF write-actions-instruction
+            /*TrafficTreatment.Builder tb = DefaultTrafficTreatment.builder();
+            fwd.treatment().allInstructions().stream()
+                .forEach(ti -> tb.deferred().add(ti));*/
+
+            FlowRule.Builder ruleBuilder = DefaultFlowRule.builder()
+                    .fromApp(fwd.appId())
+                    .withPriority(fwd.priority())
+                    .forDevice(deviceId)
+                    .withSelector(fwd.selector())
+                    .withTreatment(fwd.treatment())
+                    .makePermanent()
+                    .forTable(ACL_TABLE);
+
+            // XXX  bug in OFDPA
+            return Collections.singletonList(ruleBuilder.build());
+        }
+
+        // XXX not handling other versatile flows yet
+        return Collections.emptySet();
+    }
+
+    /**
+     * In the OF-DPA 1.0 pipeline, specific forwarding refers to the IP table
+     * (unicast or multicast) or the L2 table (mac + vlan).
+     *
+     * @param fwd the forwarding objective of type 'specific'
+     * @return    a collection of flow rules. Typically there will be only one
+     *            for this type of forwarding objective. An empty set may be
+     *            returned if there is an issue in processing the objective.
+     */
+    private Collection<FlowRule> processSpecific(ForwardingObjective fwd) {
+        log.debug("Processing specific forwarding objective");
+        TrafficSelector selector = fwd.selector();
+        EthTypeCriterion ethType =
+                (EthTypeCriterion) selector.getCriterion(Criterion.Type.ETH_TYPE);
+        // XXX currently supporting only the L3 unicast table
+        if (ethType == null || ethType.ethType() != Ethernet.TYPE_IPV4) {
+            fail(fwd, ObjectiveError.UNSUPPORTED);
+            return Collections.emptySet();
+        }
+
+        TrafficSelector filteredSelector =
+                DefaultTrafficSelector.builder()
+                        .matchEthType(Ethernet.TYPE_IPV4)
+                        .matchIPDst(
+                                ((IPCriterion)
+                                        selector.getCriterion(Criterion.Type.IPV4_DST)).ip())
+                        .build();
+
+        TrafficTreatment.Builder tb = DefaultTrafficTreatment.builder();
+
+        if (fwd.nextId() != null) {
+            NextGroup next = flowObjectiveStore.getNextGroup(fwd.nextId());
+            List<GroupKey> gkeys = appKryo.deserialize(next.data());
+            Group group = groupService.getGroup(deviceId, gkeys.get(0));
+            if (group == null) {
+                log.warn("The group left!");
+                fail(fwd, ObjectiveError.GROUPMISSING);
+                return Collections.emptySet();
+            }
+            tb.group(group.id());
+        }
+
+        FlowRule.Builder ruleBuilder = DefaultFlowRule.builder()
+                .fromApp(fwd.appId())
+                .withPriority(fwd.priority())
+                .forDevice(deviceId)
+                .withSelector(filteredSelector)
+                .withTreatment(tb.build());
+
+        if (fwd.permanent()) {
+            ruleBuilder.makePermanent();
+        } else {
+            ruleBuilder.makeTemporary(fwd.timeout());
+        }
+
+        ruleBuilder.forTable(UNICAST_ROUTING_TABLE);
+        return Collections.singletonList(ruleBuilder.build());
+    }
+
+    private void pass(Objective obj) {
+        if (obj.context().isPresent()) {
+            obj.context().get().onSuccess(obj);
+        }
+    }
+
+
+    private void fail(Objective obj, ObjectiveError error) {
+        if (obj.context().isPresent()) {
+            obj.context().get().onError(obj, error);
+        }
+    }
+
+
+    private void initializePipeline() {
+        processPortTable();
+        processVlanTable();
+        processTmacTable();
+        processIpTable();
+        //processMcastTable();
+        //processBridgingTable();
+        //processAclTable();
+        //processGroupTable();
+    }
+
+    private void processPortTable() {
+        //XXX is table miss entry enough or do we need to do the maskable in-port 0?
+        FlowRuleOperations.Builder ops = FlowRuleOperations.builder();
+        TrafficSelector.Builder selector = DefaultTrafficSelector.builder();
+        selector.matchInPort(PortNumber.portNumber(0)); // should be maskable?
+        TrafficTreatment.Builder treatment = DefaultTrafficTreatment.builder();
+        treatment.transition(VLAN_TABLE);
+        FlowRule tmisse = DefaultFlowRule.builder()
+                .forDevice(deviceId)
+                .withSelector(selector.build())
+                .withTreatment(treatment.build())
+                .withPriority(LOWEST_PRIORITY)
+                .fromApp(appId)
+                .makePermanent()
+                .forTable(PORT_TABLE).build();
+        ops = ops.add(tmisse);
+
+        flowRuleService.apply(ops.build(new FlowRuleOperationsContext() {
+            @Override
+            public void onSuccess(FlowRuleOperations ops) {
+                log.info("Initialized port table");
+            }
+
+            @Override
+            public void onError(FlowRuleOperations ops) {
+                log.info("Failed to initialize port table");
+            }
+        }));
+
+    }
+
+    private void processVlanTable() {
+        // make these up for now - should really be filtering rules
+        /*FlowRuleOperations.Builder ops = FlowRuleOperations.builder();
+        TrafficSelector.Builder selector = DefaultTrafficSelector.builder();
+        TrafficTreatment.Builder treatment = DefaultTrafficTreatment.builder();
+        selector.matchInPort(PortNumber.portNumber(10));
+        selector.matchVlanId(VlanId.vlanId((short) 100));
+        treatment.transition(TMAC_TABLE);
+        FlowRule rule = DefaultFlowRule.builder()
+                .forDevice(deviceId)
+                .withSelector(selector.build())
+                .withTreatment(treatment.build())
+                .withPriority(DEFAULT_PRIORITY)
+                .fromApp(appId)
+                .makePermanent()
+                .forTable(VLAN_TABLE).build();
+        ops =  ops.add(rule);
+        flowRuleService.apply(ops.build(new FlowRuleOperationsContext() {
+            @Override
+            public void onSuccess(FlowRuleOperations ops) {
+                log.info("Initialized vlan table");
+            }
+
+            @Override
+            public void onError(FlowRuleOperations ops) {
+                log.info("Failed to initialize vlan table");
+            }
+        }));*/
+
+        // Table miss entry is not required as ofdpa default is to drop
+        // In OF terms, the absence of a t.m.e. also implies drop
+    }
+
+
+    private void processTmacTable() {
+        // this is made up as well -- should be a filtering rule
+        /*selector.matchInPort(PortNumber.portNumber(10));
+        selector.matchVlanId(VlanId.vlanId((short) 100));
+        selector.matchEthType(Ethernet.TYPE_IPV4);
+        selector.matchEthDst(MacAddress.valueOf("00:00:00:ba:ba:00"));
+        treatment.transition(UNICAST_ROUTING_TABLE);
+        FlowRule rule = DefaultFlowRule.builder()
+                .forDevice(deviceId)
+                .withSelector(selector.build())
+                .withTreatment(treatment.build())
+                .withPriority(DEFAULT_PRIORITY)
+                .fromApp(appId)
+                .makePermanent()
+                .forTable(TMAC_TABLE).build();
+        ops =  ops.add(rule);*/
+
+        //table miss entry
+        FlowRuleOperations.Builder ops = FlowRuleOperations.builder();
+        TrafficSelector.Builder selector = DefaultTrafficSelector.builder();
+        TrafficTreatment.Builder treatment = DefaultTrafficTreatment.builder();
+        selector = DefaultTrafficSelector.builder();
+        treatment = DefaultTrafficTreatment.builder();
+        treatment.transition(BRIDGING_TABLE);
+        FlowRule rule = DefaultFlowRule.builder()
+                .forDevice(deviceId)
+                .withSelector(selector.build())
+                .withTreatment(treatment.build())
+                .withPriority(LOWEST_PRIORITY)
+                .fromApp(appId)
+                .makePermanent()
+                .forTable(TMAC_TABLE).build();
+        ops =  ops.add(rule); // XXX bug in ofdpa
+        flowRuleService.apply(ops.build(new FlowRuleOperationsContext() {
+            @Override
+            public void onSuccess(FlowRuleOperations ops) {
+                log.info("Initialized tmac table");
+            }
+
+            @Override
+            public void onError(FlowRuleOperations ops) {
+                log.info("Failed to initialize tmac table");
+            }
+        }));
+    }
+
+    private void processIpTable() {
+        //table miss entry
+        FlowRuleOperations.Builder ops = FlowRuleOperations.builder();
+        TrafficSelector.Builder selector = DefaultTrafficSelector.builder();
+        TrafficTreatment.Builder treatment = DefaultTrafficTreatment.builder();
+        selector = DefaultTrafficSelector.builder();
+        treatment = DefaultTrafficTreatment.builder();
+        treatment.transition(ACL_TABLE);
+        FlowRule rule = DefaultFlowRule.builder()
+                .forDevice(deviceId)
+                .withSelector(selector.build())
+                .withTreatment(treatment.build())
+                .withPriority(LOWEST_PRIORITY)
+                .fromApp(appId)
+                .makePermanent()
+                .forTable(UNICAST_ROUTING_TABLE).build();
+        ops =  ops.add(rule);
+        flowRuleService.apply(ops.build(new FlowRuleOperationsContext() {
+            @Override
+            public void onSuccess(FlowRuleOperations ops) {
+                log.info("Initialized IP table");
+            }
+
+            @Override
+            public void onError(FlowRuleOperations ops) {
+                log.info("Failed to initialize unicast IP table");
+            }
+        }));
+    }
+
+    @SuppressWarnings("unused")
+    private void processGroupTable() {
+        // Creating a dummy L2 group as per OFDPA requirements
+       /* TrafficTreatment treatment = DefaultTrafficTreatment.builder()
+                                        .setOutput(PortNumber.portNumber(10))
+                                        .build();
+        NextObjective nextObjective = DefaultNextObjective.builder()
+                .addTreatment(treatment)
+                .fromApp(appId)
+                .withId(678) // dummy next objective id
+                .withType(NextObjective.Type.SIMPLE)
+                .add();
+        Integer l2groupId = 0x0064000a;
+        GroupBucket bucket =
+                DefaultGroupBucket.createIndirectGroupBucket(treatment);
+        final GroupKey key = new DefaultGroupKey(appKryo.serialize(678));
+        GroupDescription groupDescriptionl2
+            = new DefaultGroupDescription(deviceId,
+                                      GroupDescription.Type.INDIRECT,
+                                      new GroupBuckets(Collections
+                                                       .singletonList(bucket)),
+                                      key,
+                                      l2groupId,
+                                      appId);
+        groupService.addGroup(groupDescriptionl2);*/
+        //pendingNextObjectives.put(key, nextObjective);
+
+    }
+
+    @SuppressWarnings("unused")
+    private void tryGroupChain() {
+      //Create a dummy L3 group as per OFDPA requirements
+        /*TrafficTreatment treatment2 = DefaultTrafficTreatment.builder()
+                .setEthDst(MacAddress.valueOf("00:00:00:aa:aa:aa"))
+                .setEthSrc(MacAddress.valueOf("00:00:00:dd:dd:dd"))
+                .setVlanId(VlanId.vlanId((short) 100))
+                .group(new DefaultGroupId(0x0064000a))
+                .build();
+        NextObjective nextObjective2 = DefaultNextObjective.builder()
+                .addTreatment(treatment2)
+                .fromApp(appId)
+                .withId(67800) // another dummy next objective id
+                .withType(NextObjective.Type.SIMPLE)
+                .add();
+        Integer l3groupId = 0x2000000a;
+        GroupBucket bucket2 = DefaultGroupBucket.createIndirectGroupBucket(treatment2);
+        final GroupKey key2 = new DefaultGroupKey(appKryo.serialize(67800));
+        GroupDescription groupDescriptionl3
+               = new DefaultGroupDescription(deviceId,
+                                  GroupDescription.Type.INDIRECT,
+                                  new GroupBuckets(Collections
+                                                   .singletonList(bucket2)),
+                                  key2,
+                                  l3groupId,
+                                  appId);
+        groupService.addGroup(groupDescriptionl3);
+        pendingNextObjectives.put(key2, nextObjective2);
+    */
+    }
+
+    private class GroupChecker implements Runnable {
+        @Override
+        public void run() {
+            Set<GroupKey> keys = pendingNextObjectives.asMap().keySet().stream()
+                    .filter(key -> groupService.getGroup(deviceId, key) != null)
+                    .collect(Collectors.toSet());
+
+            keys.stream().forEach(key -> {
+                //first check for group chain
+                GroupChainElem gce = pendingGroups.remove(key);
+                if (gce != null) {
+                    log.info("Heard back from group service. Processing next "
+                            + "group in group chain with group key {}", gce.getGkey());
+                    processGroupChain(gce);
+                } else {
+                    OfdpaGroupChain obj = pendingNextObjectives.getIfPresent(key);
+                    if (obj == null) {
+                        return;
+                    }
+                    pass(obj.nextObjective());
+                    pendingNextObjectives.invalidate(key);
+                    log.info("Heard back from group service. Applying pending "
+                            + "objectives for nextId {}", obj.nextObjective().id());
+                    flowObjectiveStore.putNextGroup(obj.nextObjective().id(), obj);
+                }
+            });
+        }
+    }
+
+
+    private class InnerGroupListener implements GroupListener {
+        @Override
+        public void event(GroupEvent event) {
+            if (event.type() == GroupEvent.Type.GROUP_ADDED) {
+                GroupKey key = event.subject().appCookie();
+                // first check for group chain
+                GroupChainElem gce = pendingGroups.remove(key);
+                if (gce != null) {
+                    log.info("group ADDED .. Processing next group in group chain "
+                            + "with group key {}", gce.getGkey());
+                    processGroupChain(gce);
+                } else {
+                    OfdpaGroupChain obj = pendingNextObjectives.getIfPresent(key);
+                    log.info("group ADDED .. Applying pending objectives if any");
+                    if (obj != null) {
+                        flowObjectiveStore.putNextGroup(obj.nextObjective().id(), obj);
+                        pass(obj.nextObjective());
+                        pendingNextObjectives.invalidate(key);
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * Represents a group-chain that implements a Next-Objective from
+     * the application. Includes information about the next objective Id, and the
+     * group keys for the groups in the group chain. The chain is expected to
+     * look like group0 --> group 1 --> outPort. Information about the groups
+     * themselves can be fetched from the Group Service using the group keys from
+     * objects instantiating this class.
+     */
+    private class OfdpaGroupChain implements NextGroup {
+        private final NextObjective nextObj;
+        private final List<GroupKey> gkeys;
+
+        /** expected group chain: group0 --> group1 --> port. */
+        public OfdpaGroupChain(List<GroupKey> gkeys, NextObjective nextObj) {
+            this.gkeys = gkeys;
+            this.nextObj = nextObj;
+        }
+
+        @SuppressWarnings("unused")
+        public List<GroupKey> groupKeys() {
+            return gkeys;
+        }
+
+        public NextObjective nextObjective() {
+            return nextObj;
+        }
+
+        @Override
+        public byte[] data() {
+            return appKryo.serialize(gkeys);
+        }
+
+    }
+
+    /**
+     * Represents a group element that is part of a chain of groups.
+     * Stores enough information to create a Group Description to add the group
+     * to the switch by requesting the Group Service. Objects instantiating this
+     * class are meant to be temporary and live as long as it is needed to wait for
+     * preceding groups in the group chain to be created.
+     */
+    private class GroupChainElem {
+        private TrafficTreatment bucketActions;
+        private Integer givenGroupId;
+        private GroupKey gkey;
+        private ApplicationId appId;
+
+        public GroupChainElem(GroupKey gkey, Integer givenGroupId,
+                              TrafficTreatment tr, ApplicationId appId) {
+            this.bucketActions = tr;
+            this.givenGroupId = givenGroupId;
+            this.gkey = gkey;
+            this.appId = appId;
+        }
+
+        public TrafficTreatment getBucketActions() {
+            return bucketActions;
+        }
+
+        public Integer getGivenGroupId() {
+            return givenGroupId;
+        }
+
+        public GroupKey getGkey() {
+            return gkey;
+        }
+
+        public ApplicationId getAppId() {
+            return appId;
+        }
+
+    }
+}

@@ -85,8 +85,6 @@ import static org.slf4j.LoggerFactory.getLogger;
  */
 public class OVSCorsaPipeline extends AbstractHandlerBehaviour implements Pipeliner {
 
-
-
     protected static final int MAC_TABLE = 0;
     protected static final int VLAN_MPLS_TABLE = 1;
     protected static final int VLAN_TABLE = 2;
@@ -149,7 +147,7 @@ public class OVSCorsaPipeline extends AbstractHandlerBehaviour implements Pipeli
         appId = coreService.registerApplication(
                 "org.onosproject.driver.OVSCorsaPipeline");
 
-        pushDefaultRules();
+        initializePipeline();
     }
 
     @Override
@@ -216,6 +214,7 @@ public class OVSCorsaPipeline extends AbstractHandlerBehaviour implements Pipeli
                                     new GroupBuckets(Collections
                                                              .singletonList(bucket)),
                                     key,
+                                    null, // let group service determine group id
                                     nextObjective.appId());
                     groupService.addGroup(groupDescription);
                     pendingGroups.put(key, nextObjective);
@@ -454,7 +453,7 @@ public class OVSCorsaPipeline extends AbstractHandlerBehaviour implements Pipeli
         }
     }
 
-    private void pushDefaultRules() {
+    private void initializePipeline() {
         processMacTable(true);
         processVlanMplsTable(true);
         processVlanTable(true);

@@ -252,6 +252,7 @@ public class SpringOpenTTP extends AbstractHandlerBehaviour
                             new GroupBuckets(
                                     Collections.singletonList(bucket)),
                             key,
+                            null,
                             nextObjective.appId());
                     groupService.addGroup(groupDescription);
                     pendingGroups.put(key, nextObjective);
@@ -274,6 +275,7 @@ public class SpringOpenTTP extends AbstractHandlerBehaviour
                             GroupDescription.Type.SELECT,
                             new GroupBuckets(buckets),
                             key,
+                            null,
                             nextObjective.appId());
                     groupService.addGroup(groupDescription);
                     pendingGroups.put(key, nextObjective);

@@ -55,5 +55,9 @@
         <behaviour api="org.onosproject.openflow.controller.driver.OpenFlowSwitchDriver"
                    impl="org.onosproject.driver.handshaker.OFCorsaSwitchDriver"/>
     </driver>
+    <driver name="ofdpa" manufacturer="Broadcom Corp." hwVersion="OF-DPA 1.0" swVersion="OF-DPA 1.0">
+        <behaviour api="org.onosproject.net.behaviour.Pipeliner"
+                   impl="org.onosproject.driver.pipeline.OFDPA1Pipeline"/>
+    </driver>
 </drivers>
 

@@ -213,6 +213,7 @@ public class Controller {
             ofSwitchDriver.init(new Dpid(dpid), desc, ofv);
             ofSwitchDriver.setAgent(agent);
             ofSwitchDriver.setRoleHandler(new RoleManager(ofSwitchDriver));
+            log.info("OpenFlow handshaker found for device {}: {}", dpid, ofSwitchDriver);
             return ofSwitchDriver;
         }
         log.error("No OpenFlow driver for {} : {}", dpid, desc);

@@ -35,6 +35,7 @@ import org.projectfloodlight.openflow.protocol.OFGroupDelete;
 import org.projectfloodlight.openflow.protocol.OFGroupMod;
 import org.projectfloodlight.openflow.protocol.OFGroupType;
 import org.projectfloodlight.openflow.protocol.action.OFAction;
+import org.projectfloodlight.openflow.protocol.action.OFActionGroup;
 import org.projectfloodlight.openflow.protocol.action.OFActionOutput;
 import org.projectfloodlight.openflow.protocol.oxm.OFOxm;
 import org.projectfloodlight.openflow.types.CircuitSignalID;
@@ -210,6 +211,12 @@ public final class GroupModBuilder {
                     actions.add(action.build());
                     break;
                 case GROUP:
+                    Instructions.GroupInstruction grp =
+                            (Instructions.GroupInstruction) i;
+                    OFActionGroup.Builder actgrp = factory.actions().buildGroup()
+                            .setGroup(OFGroup.of(grp.groupId().id()));
+                    actions.add(actgrp.build());
+                    break;
                 default:
                     log.warn("Instruction type {} not yet implemented.", i.type());
             }