[ONOS-5571] Implementating skeleton for VirtualPacket Provider

Changes.
1. The initial implementation of VirtualPacket Provdier.
2. VirtualPacketContext is added working as a connection point
   between VirtualPacketContext and (Physical)PacketContext.
3. Simple test code is added

Change-Id: I46ecbae21e146b865ee3bda1165b5076fb19eadd
diff --git a/incubator/net/src/main/java/org/onosproject/incubator/net/virtual/impl/provider/DefaultVirtualPacketProvider.java b/incubator/net/src/main/java/org/onosproject/incubator/net/virtual/impl/provider/DefaultVirtualPacketProvider.java
new file mode 100644
index 0000000..e2aa5bd
--- /dev/null
+++ b/incubator/net/src/main/java/org/onosproject/incubator/net/virtual/impl/provider/DefaultVirtualPacketProvider.java
@@ -0,0 +1,271 @@
+/*
+ * Copyright 2016-present 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.incubator.net.virtual.impl.provider;
+
+import com.google.common.collect.Maps;
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Modified;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.onlab.packet.Ethernet;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.core.CoreService;
+import org.onosproject.incubator.net.virtual.NetworkId;
+import org.onosproject.incubator.net.virtual.TenantId;
+import org.onosproject.incubator.net.virtual.VirtualDevice;
+import org.onosproject.incubator.net.virtual.VirtualNetwork;
+import org.onosproject.incubator.net.virtual.VirtualNetworkAdminService;
+import org.onosproject.incubator.net.virtual.VirtualPort;
+import org.onosproject.incubator.net.virtual.provider.AbstractVirtualProvider;
+import org.onosproject.incubator.net.virtual.provider.VirtualPacketProvider;
+import org.onosproject.incubator.net.virtual.provider.VirtualPacketProviderService;
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.flow.DefaultTrafficTreatment;
+import org.onosproject.net.flow.TrafficTreatment;
+import org.onosproject.net.flow.instructions.Instruction;
+import org.onosproject.net.flow.instructions.Instructions;
+import org.onosproject.net.packet.DefaultInboundPacket;
+import org.onosproject.net.packet.DefaultOutboundPacket;
+import org.onosproject.net.packet.InboundPacket;
+import org.onosproject.net.packet.OutboundPacket;
+import org.onosproject.net.packet.PacketContext;
+import org.onosproject.net.packet.PacketProcessor;
+import org.onosproject.net.packet.PacketService;
+import org.onosproject.net.provider.ProviderId;
+import org.osgi.service.component.ComponentContext;
+import org.slf4j.Logger;
+
+import java.nio.ByteBuffer;
+import java.util.Dictionary;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+@Component(immediate = true)
+public class DefaultVirtualPacketProvider extends AbstractVirtualProvider
+        implements VirtualPacketProvider {
+
+    private static final int PACKET_PROCESSOR_PRIORITY = 1;
+
+    private final Logger log = getLogger(getClass());
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected VirtualPacketProviderService virtualPacketProviderService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected PacketService packetService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected CoreService coreService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected VirtualPacketProviderService providerService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected VirtualNetworkAdminService virtualNetworkAdminService;
+
+
+    ApplicationId appId;
+    InternalPacketProcessor processor;
+
+    Map<VirtualPacketContext, PacketContext> contextMap;
+
+    /**
+     * Creates a provider with the supplied identifier.
+     *
+     */
+    public DefaultVirtualPacketProvider() {
+        super(new ProviderId("virtual-packet",
+                             "org.onosproject.virtual.virtual-packet"));
+    }
+
+    @Activate
+    public void activate() {
+        appId = coreService.registerApplication(
+                "org.onosproject.provider.virtual-packet-provider");
+
+        processor = new InternalPacketProcessor();
+        packetService.addProcessor(processor, PACKET_PROCESSOR_PRIORITY);
+
+        contextMap = Maps.newConcurrentMap();
+
+        log.info("Started");
+    }
+
+    @Deactivate
+    public void deactivate() {
+        packetService.removeProcessor(processor);
+    }
+
+    @Modified
+    protected void modified(ComponentContext context) {
+        Dictionary<?, ?> properties = context.getProperties();
+    }
+
+
+    @Override
+    public void emit(NetworkId networkId, OutboundPacket packet) {
+       packetService.emit(devirtualize(networkId, packet));
+    }
+
+    /**
+     * Translate the requested physical PacketContext into a virtual PacketContext.
+     * See {@link org.onosproject.net.packet.OutboundPacket}
+     *
+     * @param context A physical PacketContext be translated
+     * @return A translated virtual PacketContext
+     */
+    private Set<VirtualPacketContext> virtualize(PacketContext context) {
+        Set<VirtualPacketContext> outContext = new HashSet<>();
+
+        Set<TenantId> tIds = virtualNetworkAdminService.getTenantIds();
+
+        Set<VirtualNetwork> vNetworks = new HashSet<>();
+        tIds.stream()
+                .map(tid -> virtualNetworkAdminService
+                        .getVirtualNetworks(tid))
+                .forEach(vNetworks::addAll);
+
+        Set<VirtualDevice> vDevices = new HashSet<>();
+        vNetworks.stream()
+                .map(network -> virtualNetworkAdminService
+                        .getVirtualDevices(network.id()))
+                .forEach(vDevices::addAll);
+
+        Set<VirtualPort> vPorts = new HashSet<>();
+        vDevices.stream()
+                .map(dev -> virtualNetworkAdminService
+                        .getVirtualPorts(dev.networkId(), dev.id()))
+                .forEach(vPorts::addAll);
+
+        ConnectPoint inCp = context.inPacket().receivedFrom();
+
+        Set<VirtualPort> inVports = vPorts.stream()
+                .filter(vp -> vp.realizedBy().equals(inCp))
+                .collect(Collectors.toSet());
+
+        for (VirtualPort vPort : inVports) {
+            ConnectPoint cp = new ConnectPoint(vPort.element().id(),
+                                               vPort.number());
+
+            Ethernet eth = context.inPacket().parsed();
+            eth.setVlanID(Ethernet.VLAN_UNTAGGED);
+
+            InboundPacket inPacket =
+                    new DefaultInboundPacket(cp, eth,
+                                             ByteBuffer.wrap(eth.serialize()));
+
+            VirtualPacketContext vContext =
+                    new VirtualPacketContext(context.time(), inPacket, null,
+                                             false, vPort.networkId(),
+                                             this);
+
+            contextMap.put(vContext, context);
+            outContext.add(vContext);
+        }
+
+        return outContext;
+    }
+
+    /**
+     * Translate the requested a virtual outbound packet into
+     * a physical OutboundPacket.
+     * See {@link org.onosproject.net.packet.PacketContext}
+     *
+     * @param packet A OutboundPacket to be translated
+     * @return de-virtualized (physical) OutboundPacket
+     */
+    private OutboundPacket devirtualize(NetworkId networkId, OutboundPacket packet) {
+        Set<VirtualPort> vPorts = virtualNetworkAdminService
+                .getVirtualPorts(networkId, packet.sendThrough());
+
+        PortNumber vOutPortNum = packet.treatment().allInstructions().stream()
+                .filter(i -> i.type() == Instruction.Type.OUTPUT)
+                .map(i -> ((Instructions.OutputInstruction) i).port())
+                .findFirst().get();
+
+        Optional<ConnectPoint> optionalCpOut = vPorts.stream()
+                .filter(v -> v.number().equals(vOutPortNum))
+                .map(v -> v.realizedBy())
+                .findFirst();
+        if (!optionalCpOut.isPresent()) {
+            log.info("Port {} is not realized yet, in Network {}, Device {}",
+                     vOutPortNum, networkId, packet.sendThrough());
+            return null;
+        }
+        ConnectPoint egressPoint = optionalCpOut.get();
+
+        TrafficTreatment.Builder commonTreatmentBuilder
+                = DefaultTrafficTreatment.builder();
+        packet.treatment().allInstructions().stream()
+                .filter(i -> i.type() != Instruction.Type.OUTPUT)
+                .forEach(i -> commonTreatmentBuilder.add(i));
+        TrafficTreatment commonTreatment = commonTreatmentBuilder.build();
+
+        TrafficTreatment treatment = DefaultTrafficTreatment
+                .builder(commonTreatment)
+                .setOutput(egressPoint.port()).build();
+
+        OutboundPacket outboundPacket = new DefaultOutboundPacket(
+                egressPoint.deviceId(), treatment, packet.data());
+        return outboundPacket;
+    }
+
+    /**
+     * Translate the requested a virtual Packet Context into
+     * a physical Packet Context.
+     * This method is designed to support Context's send() method that invoked
+     * by applications.
+     * See {@link org.onosproject.net.packet.PacketContext}
+     *
+     * @param context A handled packet context
+     * @return de-virtualized (physical) PacketContext
+     */
+    public PacketContext devirtualizeContext(VirtualPacketContext context) {
+        NetworkId networkId = context.getNetworkId();
+
+        OutboundPacket op = devirtualize(networkId, context.outPacket());
+
+        PacketContext packetContext = contextMap.get(context);
+
+        TrafficTreatment.Builder treatmentBuilder
+                = packetContext.treatmentBuilder();
+        if (op.treatment() != null) {
+            op.treatment().allInstructions().forEach(treatmentBuilder::add);
+        }
+
+        return packetContext;
+    }
+
+    private final class InternalPacketProcessor implements PacketProcessor {
+
+        @Override
+        public void process(PacketContext context) {
+            Set<VirtualPacketContext> vContexts = virtualize(context);
+            vContexts.forEach(vpc -> virtualPacketProviderService
+                                              .processPacket(vpc.getNetworkId(),
+                                                             vpc));
+        }
+    }
+}
diff --git a/incubator/net/src/main/java/org/onosproject/incubator/net/virtual/impl/provider/VirtualPacketContext.java b/incubator/net/src/main/java/org/onosproject/incubator/net/virtual/impl/provider/VirtualPacketContext.java
new file mode 100644
index 0000000..931fb22
--- /dev/null
+++ b/incubator/net/src/main/java/org/onosproject/incubator/net/virtual/impl/provider/VirtualPacketContext.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2016-present 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.incubator.net.virtual.impl.provider;
+
+import org.onosproject.incubator.net.virtual.NetworkId;
+import org.onosproject.net.packet.DefaultPacketContext;
+import org.onosproject.net.packet.InboundPacket;
+import org.onosproject.net.packet.OutboundPacket;
+import org.onosproject.net.packet.PacketContext;
+
+/**
+ * Represents context for processing an inbound packet for a virtual network
+ * and (optionally) emitting a corresponding outbound packet.
+ * The translation of context is handled by VirtualPacketProvider.
+ */
+public class VirtualPacketContext extends DefaultPacketContext {
+    private DefaultVirtualPacketProvider dvpp;
+    private NetworkId networkId;
+
+    /**
+     * Creates a new packet context.
+     *
+     * @param time   creation time
+     * @param inPkt  inbound packet
+     * @param outPkt outbound packet
+     * @param block  whether the context is blocked or not
+     * @param networkId virtual network ID where this context is handled
+     * @param dvpp The pointer for DefaultVirtualPacketProvider
+     */
+
+    protected VirtualPacketContext(long time, InboundPacket inPkt,
+                                   OutboundPacket outPkt, boolean block,
+                                   NetworkId networkId,
+                                   DefaultVirtualPacketProvider dvpp) {
+        super(time, inPkt, outPkt, block);
+
+        this.networkId = networkId;
+        this.dvpp = dvpp;
+    }
+
+    @Override
+    public void send() {
+        if (!this.block()) {
+            PacketContext context = dvpp.devirtualizeContext(this);
+            context.send();
+        }
+    }
+
+    public NetworkId getNetworkId() {
+        return networkId;
+    }
+}
diff --git a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/provider/DefaultVirtualPacketProviderTest.java b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/provider/DefaultVirtualPacketProviderTest.java
new file mode 100644
index 0000000..af4f760
--- /dev/null
+++ b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/provider/DefaultVirtualPacketProviderTest.java
@@ -0,0 +1,429 @@
+/*
+ * Copyright 2016-present 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.incubator.net.virtual.impl.provider;
+
+import com.google.common.collect.ImmutableSet;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onlab.osgi.ServiceDirectory;
+import org.onlab.packet.Ethernet;
+import org.onlab.packet.IpAddress;
+import org.onlab.packet.MacAddress;
+import org.onlab.packet.VlanId;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.core.CoreServiceAdapter;
+import org.onosproject.core.DefaultApplicationId;
+import org.onosproject.incubator.net.virtual.DefaultVirtualDevice;
+import org.onosproject.incubator.net.virtual.DefaultVirtualNetwork;
+import org.onosproject.incubator.net.virtual.DefaultVirtualPort;
+import org.onosproject.incubator.net.virtual.NetworkId;
+import org.onosproject.incubator.net.virtual.TenantId;
+import org.onosproject.incubator.net.virtual.VirtualDevice;
+import org.onosproject.incubator.net.virtual.VirtualHost;
+import org.onosproject.incubator.net.virtual.VirtualLink;
+import org.onosproject.incubator.net.virtual.VirtualNetwork;
+import org.onosproject.incubator.net.virtual.VirtualNetworkAdminService;
+import org.onosproject.incubator.net.virtual.VirtualPort;
+import org.onosproject.incubator.net.virtual.provider.VirtualPacketProvider;
+import org.onosproject.incubator.net.virtual.provider.VirtualPacketProviderService;
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.DefaultAnnotations;
+import org.onosproject.net.DefaultDevice;
+import org.onosproject.net.DefaultLink;
+import org.onosproject.net.DefaultPort;
+import org.onosproject.net.Device;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.HostId;
+import org.onosproject.net.HostLocation;
+import org.onosproject.net.Link;
+import org.onosproject.net.Port;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.flow.DefaultTrafficTreatment;
+import org.onosproject.net.flow.TrafficTreatment;
+import org.onosproject.net.flow.instructions.Instruction;
+import org.onosproject.net.flow.instructions.Instructions;
+import org.onosproject.net.packet.DefaultInboundPacket;
+import org.onosproject.net.packet.DefaultOutboundPacket;
+import org.onosproject.net.packet.DefaultPacketContext;
+import org.onosproject.net.packet.InboundPacket;
+import org.onosproject.net.packet.OutboundPacket;
+import org.onosproject.net.packet.PacketContext;
+import org.onosproject.net.packet.PacketProcessor;
+import org.onosproject.net.packet.PacketServiceAdapter;
+import org.onosproject.net.provider.ProviderId;
+
+import java.nio.ByteBuffer;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Set;
+
+import static org.junit.Assert.assertEquals;
+
+public class DefaultVirtualPacketProviderTest {
+    private static final String SRC_MAC_ADDR = "00:00:00:00:00:00";
+    private static final String DST_MAC_ADDR = "00:00:00:00:00:01";
+    private static final ProviderId PID = new ProviderId("of", "foo");
+
+    private static final DeviceId DID1 = DeviceId.deviceId("of:001");
+    private static final DeviceId DID2 = DeviceId.deviceId("of:002");
+    private static final PortNumber PORT_NUM1 = PortNumber.portNumber(1);
+    private static final PortNumber PORT_NUM2 = PortNumber.portNumber(2);
+    private static final PortNumber PORT_NUM3 = PortNumber.portNumber(3);
+    private static final PortNumber PORT_NUM4 = PortNumber.portNumber(4);
+
+    private static final DefaultAnnotations ANNOTATIONS =
+            DefaultAnnotations.builder().set("foo", "bar").build();
+
+    private static final Device DEV1 =
+            new DefaultDevice(PID, DID1, Device.Type.SWITCH, "", "", "", "", null);
+    private static final Device DEV2 =
+            new DefaultDevice(PID, DID2, Device.Type.SWITCH, "", "", "", "", null);
+    private static final Port PORT11 =
+            new DefaultPort(DEV1, PORT_NUM1, true, ANNOTATIONS);
+    private static final Port PORT12 =
+            new DefaultPort(DEV1, PORT_NUM2, true, ANNOTATIONS);
+    private static final Port PORT21 =
+            new DefaultPort(DEV2, PORT_NUM3, true, ANNOTATIONS);
+    private static final Port PORT22 =
+            new DefaultPort(DEV2, PORT_NUM4, true, ANNOTATIONS);
+
+    private static final ConnectPoint CP11 = new ConnectPoint(DID1, PORT_NUM1);
+    private static final ConnectPoint CP12 = new ConnectPoint(DID1, PORT_NUM2);
+    private static final ConnectPoint CP21 = new ConnectPoint(DID2, PORT_NUM3);
+    private static final ConnectPoint CP22 = new ConnectPoint(DID2, PORT_NUM4);
+    private static final Link LINK1 = DefaultLink.builder()
+            .src(CP12).dst(CP21).providerId(PID).type(Link.Type.DIRECT).build();
+
+    private static final TenantId TENANT_ID = TenantId.tenantId("1");
+    private static final NetworkId VNET_ID = NetworkId.networkId(1);
+    private static final DeviceId VDID = DeviceId.deviceId("of:100");
+
+    private static final PortNumber VPORT_NUM1 = PortNumber.portNumber(10);
+    private static final PortNumber VPORT_NUM2 = PortNumber.portNumber(11);
+
+    private static final VirtualNetwork VNET = new DefaultVirtualNetwork(
+            VNET_ID, TenantId.tenantId("t1"));
+    private static final VirtualDevice VDEV =
+            new DefaultVirtualDevice(VNET_ID, VDID);
+    private static final VirtualPort VPORT1 =
+            new DefaultVirtualPort(VNET_ID, VDEV, VPORT_NUM1, CP11);
+    private static final VirtualPort VPORT2 =
+            new DefaultVirtualPort(VNET_ID, VDEV, VPORT_NUM2, CP22);
+    private static final ConnectPoint VCP11 = new ConnectPoint(VDID, VPORT_NUM1);
+    private static final ConnectPoint VCP12 = new ConnectPoint(VDID, VPORT_NUM2);
+
+    protected DefaultVirtualPacketProvider virtualProvider;
+    protected TestPacketService testPacketService;
+    protected TestVirtualPacketProivderService providerService;
+
+    private ApplicationId vAppId;
+
+    @Before
+    public void setUp() {
+        virtualProvider = new DefaultVirtualPacketProvider();
+
+        virtualProvider.coreService = new CoreServiceAdapter();
+        virtualProvider.virtualNetworkAdminService =
+                new TestVirtualNetworkAdminService();
+
+        providerService = new TestVirtualPacketProivderService();
+        virtualProvider.virtualPacketProviderService = providerService;
+
+        testPacketService = new TestPacketService();
+        virtualProvider.packetService = testPacketService;
+
+        virtualProvider.activate();
+        vAppId = new TestApplicationId(0, "Virtual App");
+    }
+
+    @After
+    public void tearDown() {
+        virtualProvider.deactivate();
+        virtualProvider.coreService = null;
+        virtualProvider.virtualNetworkAdminService = null;
+        virtualProvider.providerService = null;
+    }
+
+
+    /** Test the virtual outbound packet is delivered to a proper (physical)
+     *  device.
+     */
+    @Test
+    public void devirtualizePacket() {
+        TrafficTreatment tr = DefaultTrafficTreatment.builder()
+                .setOutput(VPORT_NUM1).build();
+        ByteBuffer data = ByteBuffer.wrap("abc".getBytes());
+
+        OutboundPacket vOutPacket = new DefaultOutboundPacket(VDID, tr, data);
+
+        virtualProvider.emit(VNET_ID, vOutPacket);
+
+        assertEquals("The count should be 1", 1,
+                     testPacketService.getRequestedPacketCount());
+
+        OutboundPacket pOutPacket = testPacketService.getRequestedPacket(0);
+
+        assertEquals("The packet should be requested on DEV1", DID1,
+                     pOutPacket.sendThrough());
+
+        PortNumber outPort = pOutPacket.treatment()
+                .allInstructions()
+                .stream()
+                .filter(i -> i.type() == Instruction.Type.OUTPUT)
+                .map(i -> (Instructions.OutputInstruction) i)
+                .map(i -> i.port())
+                .findFirst().get();
+        assertEquals("The packet should be out at PORT1 of DEV1", PORT_NUM1,
+                     outPort);
+    }
+
+    /** Test the physical packet context is delivered to a proper (physical)
+     *  virtual network and device.
+     */
+    @Test
+    public void virtualizePacket() {
+        Ethernet eth = new Ethernet();
+        eth.setSourceMACAddress(SRC_MAC_ADDR);
+        eth.setDestinationMACAddress(DST_MAC_ADDR);
+        eth.setVlanID((short) 1);
+        eth.setPayload(null);
+
+        InboundPacket pInPacket =
+                new DefaultInboundPacket(CP22, eth,
+                                         ByteBuffer.wrap(eth.serialize()));
+
+        PacketContext pContext =
+                new TestPacketContext(System.nanoTime(), pInPacket, null, false);
+
+        testPacketService.sendTestPacketContext(pContext);
+
+        assertEquals("The virtual network Id should be 1", VNET_ID,
+                     providerService.getRequestedNetworkId(0));
+
+        PacketContext vContext = providerService.getRequestedPacketContext(0);
+        InboundPacket vInPacket = vContext.inPacket();
+
+        assertEquals("the packet should be received from VCP12",
+                     VCP12, vInPacket.receivedFrom());
+
+        assertEquals("VLAN tag should be excludede", VlanId.UNTAGGED,
+                     vInPacket.parsed().getVlanID());
+    }
+
+    private class TestPacketContext extends DefaultPacketContext {
+
+        /**
+         * Creates a new packet context.
+         *
+         * @param time   creation time
+         * @param inPkt  inbound packet
+         * @param outPkt outbound packet
+         * @param block  whether the context is blocked or not
+         */
+        protected TestPacketContext(long time, InboundPacket inPkt,
+                                    OutboundPacket outPkt, boolean block) {
+            super(time, inPkt, outPkt, block);
+        }
+
+        @Override
+        public void send() {
+
+        }
+    }
+
+    private static class TestApplicationId extends DefaultApplicationId {
+        public TestApplicationId(int id, String name) {
+            super(id, name);
+        }
+    }
+
+    private static class TestVirtualNetworkAdminService
+            implements VirtualNetworkAdminService {
+
+        @Override
+        public Set<VirtualNetwork> getVirtualNetworks(TenantId tenantId) {
+            return ImmutableSet.of(VNET);
+        }
+
+        @Override
+        public Set<VirtualDevice> getVirtualDevices(NetworkId networkId) {
+            return ImmutableSet.of(VDEV);
+        }
+
+        @Override
+        public Set<VirtualHost> getVirtualHosts(NetworkId networkId) {
+            return null;
+        }
+
+        @Override
+        public Set<VirtualLink> getVirtualLinks(NetworkId networkId) {
+            return null;
+        }
+
+        @Override
+        public Set<VirtualPort> getVirtualPorts(NetworkId networkId,
+                                                DeviceId deviceId) {
+            return ImmutableSet.of(VPORT1, VPORT2);
+        }
+
+        @Override
+        public <T> T get(NetworkId networkId, Class<T> serviceClass) {
+            return null;
+        }
+
+        @Override
+        public ServiceDirectory getServiceDirectory() {
+            return null;
+        }
+
+        @Override
+        public void registerTenantId(TenantId tenantId) {
+
+        }
+
+        @Override
+        public void unregisterTenantId(TenantId tenantId) {
+
+        }
+
+        @Override
+        public Set<TenantId> getTenantIds() {
+            return ImmutableSet.of(TENANT_ID);
+        }
+
+        @Override
+        public VirtualNetwork createVirtualNetwork(TenantId tenantId) {
+            return null;
+        }
+
+        @Override
+        public void removeVirtualNetwork(NetworkId networkId) {
+
+        }
+
+        @Override
+        public VirtualDevice createVirtualDevice(NetworkId networkId,
+                                                 DeviceId deviceId) {
+            return null;
+        }
+
+        @Override
+        public void removeVirtualDevice(NetworkId networkId, DeviceId deviceId) {
+
+        }
+
+        @Override
+        public VirtualHost createVirtualHost(NetworkId networkId, HostId hostId,
+                                             MacAddress mac, VlanId vlan,
+                                             HostLocation location,
+                                             Set<IpAddress> ips) {
+            return null;
+        }
+
+        @Override
+        public void removeVirtualHost(NetworkId networkId, HostId hostId) {
+
+        }
+
+        @Override
+        public VirtualLink createVirtualLink(NetworkId networkId,
+                                             ConnectPoint src, ConnectPoint dst) {
+            return null;
+        }
+
+        @Override
+        public void removeVirtualLink(NetworkId networkId,
+                                      ConnectPoint src, ConnectPoint dst) {
+
+        }
+
+        @Override
+        public VirtualPort createVirtualPort(NetworkId networkId,
+                                             DeviceId deviceId,
+                                             PortNumber portNumber,
+                                             ConnectPoint realizedBy) {
+            return null;
+        }
+
+        @Override
+        public void bindVirtualPort(NetworkId networkId,
+                                    DeviceId deviceId,
+                                    PortNumber portNumber,
+                                    ConnectPoint realizedBy) {
+
+        }
+
+        @Override
+        public void removeVirtualPort(NetworkId networkId, DeviceId deviceId,
+                                      PortNumber portNumber) {
+
+        }
+    }
+
+    private static class TestVirtualPacketProivderService
+            implements VirtualPacketProviderService {
+        static List<PacketContext> requestedContext = new LinkedList();
+        static List<NetworkId> requestedNetworkId = new LinkedList();
+
+        @Override
+        public VirtualPacketProvider provider() {
+            return null;
+        }
+
+        @Override
+        public void processPacket(NetworkId networkId, PacketContext context) {
+            requestedNetworkId.add(networkId);
+            requestedContext.add(context);
+        }
+
+        public NetworkId getRequestedNetworkId(int index) {
+            return requestedNetworkId.get(0);
+        }
+
+        public PacketContext getRequestedPacketContext(int index) {
+            return requestedContext.get(0);
+        }
+    }
+
+    private static class TestPacketService extends PacketServiceAdapter {
+        static List<OutboundPacket> requestedPacket = new LinkedList();
+        static PacketProcessor processor = null;
+
+        @Override
+        public void addProcessor(PacketProcessor processor, int priority) {
+            this.processor = processor;
+        }
+
+        @Override
+        public void emit(OutboundPacket packet) {
+            requestedPacket.add(packet);
+        }
+
+        public OutboundPacket getRequestedPacket(int index) {
+            return requestedPacket.get(index);
+        }
+
+        public int getRequestedPacketCount() {
+            return requestedPacket.size();
+        }
+
+        public void sendTestPacketContext(PacketContext context) {
+            processor.process(context);
+        }
+    }
+}