[ONOS-3689] Implement skeleton of Neutron L3 service plugin

  - Added event handlers (Floatingip_CUD(Create, Update, Delete), Router_CUD, and RouterInterface_CUD).
  - Added packet handlers about ICMP and pNAT.
  - Added the models of openstack router, router interface, external gateway and floatingIP.
  - Fixed pom.xml
  - Added external_fixed_IP information for PNAT and renamed SNAT to PNAT in OpenstackExternalGateway
  - Fixed java docs in OpenstackRoutingService.java

Change-Id: Ia694614cf8885d81a66fc4659db2fa0c5de5e950

+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Copyright 2016 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.
+  -->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.onosproject</groupId>
+        <artifactId>onos-apps</artifactId>
+        <version>1.5.0-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+
+    <artifactId>onos-app-openstackrouting</artifactId>
+    <packaging>bundle</packaging>
+
+    <description>SONA Openstack Routing Application</description>
+
+    <properties>
+        <onos.app.name>org.onosproject.openstackrouting</onos.app.name>
+        <onos.app.category>default</onos.app.category>
+        <onos.app.url>http://onosproject.org</onos.app.url>
+        <onos.app.readme>SONA Openstack Routing Application</onos.app.readme>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.osgi</groupId>
+            <artifactId>org.osgi.compendium</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.onosproject</groupId>
+            <artifactId>onos-api</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.onosproject</groupId>
+            <artifactId>onos-core-serializers</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.onosproject</groupId>
+            <artifactId>onos-ovsdb-api</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+    </dependencies>
+</project>

+/*
+ * Copyright 2016 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.openstackrouting;
+
+import org.onlab.packet.Ip4Address;
+
+import java.util.HashMap;
+
+/**
+ * A configurable external gateway modes extension model in openstack router.
+ */
+public final class OpenstackExternalGateway {
+
+    private String networkId;
+    private boolean enablePNAT;
+    private HashMap<String, Ip4Address> externalFixedIps;
+
+    private OpenstackExternalGateway(String networkId, boolean enablePNAT,
+                                     HashMap externalFixedIps) {
+        this.networkId = networkId;
+        this.enablePNAT = enablePNAT;
+        this.externalFixedIps = externalFixedIps;
+    }
+
+    /**
+     * Returns network ID.
+     *
+     * @return Network ID
+     */
+    public String networkId() {
+        return networkId;
+    }
+
+    /**
+     * Returns the PNAT status for external gateway.
+     *
+     * @return PNAT status
+     */
+    public boolean isEnablePNAT() {
+        return enablePNAT;
+    }
+
+    /**
+     * An Openstack External Gateway Builder class.
+     */
+    public static final class Builder {
+        private String networkId;
+        private boolean enablePNAT;
+        private HashMap<String, Ip4Address> externalFixedIPs;
+
+        Builder() {
+            externalFixedIPs = new HashMap<>();
+        }
+
+        /**
+         * Sets network ID.
+         *
+         * @param networkId Network ID
+         * @return Builder object
+         */
+        public Builder networkId(String networkId) {
+            this.networkId = networkId;
+            return this;
+        }
+
+        /**
+         * Sets whether PNAT status is enabled or not.
+         *
+         * @param enablePNAT true if PNAT status is enabled, false otherwise
+         * @return Builder object
+         */
+        public Builder enablePNAT(boolean enablePNAT) {
+            this.enablePNAT = enablePNAT;
+            return this;
+        }
+
+        /**
+         * Sets external fixed IP address information.
+         *
+         * @param externalFixedIPs External fixed IP information
+         * @return Builder object
+         */
+        public Builder externalFixedIPs(HashMap<String, Ip4Address> externalFixedIPs) {
+            this.externalFixedIPs.putAll(externalFixedIPs);
+            return this;
+        }
+
+        /**
+         * Builds an OpenstackExternalGateway object.
+         *
+         * @return OpenstackExternalGateway object
+         */
+        public OpenstackExternalGateway build() {
+            return new OpenstackExternalGateway(networkId, enablePNAT, externalFixedIPs);
+        }
+    }
+
+}

+/*
+ * Copyright 2016 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.openstackrouting;
+
+import org.onlab.packet.Ip4Address;
+
+/**
+ *  An Openstack Neutron Floating IP Model.
+ */
+public final class OpenstackFloatingIP {
+
+    public enum FloatingIPStatus {
+        UP,
+        DOWN,
+        ACTIVE,
+    }
+
+    private String tenantId;
+    private String networkId;
+    private Ip4Address fixedIpAddress;
+    private String portId;
+    private String routerId;
+    private String id;
+    private Ip4Address floatingIpAddress;
+    private FloatingIPStatus status;
+
+    private OpenstackFloatingIP(FloatingIPStatus status, String id, String tenantId,
+                                String networkId, Ip4Address fixedIpAddress, String portId,
+                                String routerId, Ip4Address floatingIpAddress) {
+        this.status = status;
+        this.id = id;
+        this.tenantId = tenantId;
+        this.networkId = networkId;
+        this.fixedIpAddress = fixedIpAddress;
+        this.portId = portId;
+        this.routerId = routerId;
+        this.floatingIpAddress = floatingIpAddress;
+    }
+
+    /**
+     * Returns floating ip status.
+     *
+     * @return floating ip status
+     */
+    public FloatingIPStatus status() {
+        return status;
+    }
+
+    /**
+     * Returns floating ip`s ID.
+     *
+     * @return floating ip`s ID
+     */
+    public String id() {
+        return id;
+    }
+
+    /**
+     * Returns tenant ID.
+     *
+     * @return tenant ID
+     */
+    public String tenantId() {
+        return tenantId;
+    }
+
+    /**
+     * Returns network ID.
+     *
+     * @return network ID
+     */
+    public String networkId() {
+        return networkId;
+    }
+
+    /**
+     * Returns fixed IP Address.
+     *
+     * @return fixed IP Address
+     */
+    public Ip4Address fixedIpAddress() {
+        return fixedIpAddress;
+    }
+
+    /**
+     * Returns port ID.
+     *
+     * @return port ID
+     */
+    public String portId() {
+        return portId;
+    }
+
+    /**
+     * Returns router ID.
+     *
+     * @return router ID
+     */
+    public String routerId() {
+        return routerId;
+    }
+
+    /**
+     * Returns floating IP address.
+     *
+     * @return Floating IP address
+     */
+    public Ip4Address floatingIpAddress() {
+        return floatingIpAddress;
+    }
+
+    /**
+     * An Openstack Floating IP Builder class.
+     */
+    public static final class Builder {
+        private String tenantId;
+        private String networkId;
+        private Ip4Address fixedIpAddress;
+        private String portId;
+        private String routerId;
+        private String id;
+        private Ip4Address floatingIpAddress;
+        private FloatingIPStatus status;
+
+        /**
+         * Sets tenant ID.
+         *
+         * @param tenantId tenant ID
+         * @return Builder object
+         */
+        public Builder tenantId(String tenantId) {
+            this.tenantId = tenantId;
+            return this;
+        }
+
+        /**
+         * Sets floating IP status.
+         *
+         * @param status Floating IP status
+         * @return Builder object
+         */
+        public Builder status(FloatingIPStatus status) {
+            this.status = status;
+            return this;
+        }
+
+        /**
+         * Sets Floating IP`s ID.
+         *
+         * @param id Floating IP`s ID
+         * @return Builder object
+         */
+        public Builder id(String id) {
+            this.id = id;
+            return this;
+        }
+
+        /**
+         * Sets network ID.
+         *
+         * @param networkId Network ID
+         * @return Builder object
+         */
+        public Builder networkId(String networkId) {
+            this.networkId = networkId;
+            return this;
+        }
+
+        /**
+         * Sets fixed IP address.
+         *
+         * @param fixedIpAddress Fixed IP address
+         * @return Builder object
+         */
+        public Builder fixedIpAddress(Ip4Address fixedIpAddress) {
+            this.fixedIpAddress = fixedIpAddress;
+            return this;
+        }
+
+        /**
+         * Sets port ID.
+         *
+         * @param portId port ID
+         * @return Builder object
+         */
+        public Builder portId(String portId) {
+            this.portId = portId;
+            return this;
+        }
+
+        /**
+         * Sets router ID.
+         *
+         * @param routerId router ID
+         * @return Builder object
+         */
+        public Builder routerId(String routerId) {
+            this.routerId = routerId;
+            return this;
+        }
+
+        /**
+         * Sets floating IP address.
+         *
+         * @param floatingIpAddress Floating IP address
+         * @return Builder object
+         */
+        public Builder floatingIpAddress(Ip4Address floatingIpAddress) {
+            this.floatingIpAddress = floatingIpAddress;
+            return this;
+        }
+
+        /**
+         * Builds an OpenstackFloatingIP object.
+         *
+         * @return OpenstackFloatingIP object
+         */
+        public OpenstackFloatingIP build() {
+            return new OpenstackFloatingIP(status, id, tenantId, networkId,
+                    fixedIpAddress, portId, routerId, floatingIpAddress);
+
+        }
+    }
+}

+/*
+ * Copyright 2016 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.openstackrouting;
+
+import org.onosproject.event.AbstractEvent;
+
+/**
+ * Handle FloatingIP Event for Managing Flow Rules In Openstack Nodes.
+ */
+public class OpenstackFloatingIPHandler implements Runnable {
+
+    volatile AbstractEvent event;
+    OpenstackFloatingIPHandler(AbstractEvent event) {
+        this.event = event;
+    }
+
+    @Override
+    public void run() {
+
+    }
+}

+/*
+ * Copyright 2016 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.openstackrouting;
+
+import org.onosproject.net.packet.PacketContext;
+
+/**
+ * Handle ICMP packet processing for Managing Flow Rules In Openstack Nodes.
+ */
+public class OpenstackICMPHandler implements Runnable {
+
+    volatile PacketContext context;
+    OpenstackICMPHandler(PacketContext context) {
+        this.context = context;
+    }
+
+    @Override
+    public void run() {
+
+    }
+}

+/*
+ * Copyright 2016 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.openstackrouting;
+
+import org.onosproject.net.packet.PacketContext;
+
+/**
+ * Handle NAT packet processing for Managing Flow Rules In Openstack Nodes.
+ */
+public class OpenstackPNATHandler implements Runnable {
+
+    volatile PacketContext context;
+    OpenstackPNATHandler(PacketContext context) {
+        this.context = context;
+    }
+
+    @Override
+    public void run() {
+
+    }
+}

+/*
+ * Copyright 2016 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.openstackrouting;
+
+/**
+ * An Openstack Neutron Router Model.
+ */
+public final class OpenstackRouter {
+
+    public enum RouterStatus {
+        UP,
+        DOWN,
+        ACTIVE,
+    }
+
+    private String tenantId;
+    private String id;
+    private String name;
+    private RouterStatus status;
+    private boolean adminStateUp;
+    private OpenstackExternalGateway gatewayExternalInfo;
+
+    private OpenstackRouter(String id, String tenantId, String name, RouterStatus status,
+                           boolean adminStateUp, OpenstackExternalGateway gatewayExternalInfo) {
+        this.id = id;
+        this.tenantId = tenantId;
+        this.name = name;
+        this.status = status;
+        this.adminStateUp = adminStateUp;
+        this.gatewayExternalInfo = gatewayExternalInfo;
+
+    }
+
+    /**
+     * Returns tenant ID.
+     *
+     * @return tenant ID
+     */
+    public String tenantId() {
+        return tenantId;
+    }
+
+    /**
+     * Returns router ID.
+     *
+     * @return router ID
+     */
+    public String id() {
+        return id;
+    }
+
+    /**
+     * Returns router name.
+     *
+     * @return router name
+     */
+    public String name() {
+        return name;
+    }
+
+    /**
+     * Returns router status.
+     *
+     * @return router stauts
+     */
+    public RouterStatus status() {
+        return status;
+    }
+
+    /**
+     * Returns whether admin state up or not.
+     *
+     * @return true if admin state up, false otherwise
+     */
+    public boolean adminStateUp() {
+        return adminStateUp;
+    }
+
+    /**
+     * Returns external gateway information.
+     *
+     * @return external gateway information
+     */
+    public OpenstackExternalGateway gatewayExternalInfo() {
+        return gatewayExternalInfo;
+    }
+
+    /**
+     * An Openstack Router Builder class.
+     */
+    public static final class Builder {
+
+        private String tenantId;
+        private String id;
+        private String name;
+        private RouterStatus status;
+        private Boolean adminStateUp;
+        private OpenstackExternalGateway gatewayExternalInfo;
+
+        /**
+         * Sets router ID.
+         *
+         * @param id router ID
+         * @return Builder object
+         */
+        public Builder id(String id) {
+            this.id = id;
+            return this;
+        }
+
+        /**
+         * Sets router name.
+         *
+         * @param name router name
+         * @return Builder object
+         */
+        public Builder name(String name) {
+            this.name = name;
+            return this;
+        }
+
+        /**
+         * Sets router status.
+         *
+         * @param status router status
+         * @return Builder object
+         */
+        public Builder status(RouterStatus status) {
+            this.status = status;
+            return this;
+        }
+
+        /**
+         * Sets tenant ID.
+         *
+         * @param tenantId Tenant ID
+         * @return Builder object
+         */
+        public Builder tenantId(String tenantId) {
+            this.tenantId = tenantId;
+            return this;
+        }
+
+        /**
+         * Sets whether admin state up or not.
+         *
+         * @param adminStateUp true if admin state is up, false otherwise
+         * @return Builder object
+         */
+        public Builder adminStateUp(boolean adminStateUp) {
+            this.adminStateUp = adminStateUp;
+            return this;
+        }
+
+        /**
+         * Sets external gateway information.
+         *
+         * @param gatewayExternalInfo external gateway information
+         * @return Builder object
+         */
+        public Builder gatewayExternalInfo(OpenstackExternalGateway gatewayExternalInfo) {
+            this.gatewayExternalInfo = gatewayExternalInfo;
+            return this;
+        }
+
+        /**
+         * Builds an OpenstackRouter object.
+         *
+         * @return OpenstasckRouter object
+         */
+        public OpenstackRouter build() {
+            return new OpenstackRouter(id, tenantId, name, status,
+                    adminStateUp, gatewayExternalInfo);
+        }
+    }
+
+
+}

+/*
+ * Copyright 2016 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.openstackrouting;
+
+/**
+ * An Openstack Neutron Router Interface Model.
+ */
+public final class OpenstackRouterInterface {
+    private String id;
+    private String tenantId;
+    private String subnetId;
+    private String portId;
+
+    private OpenstackRouterInterface(String id, String tenantId,
+                                     String subnetId, String portId) {
+        this.id = id;
+        this.tenantId = tenantId;
+        this.subnetId = subnetId;
+        this.portId = portId;
+    }
+
+    /**
+     * Returns Router Interface ID.
+     *
+     * @return router interface ID
+     */
+    public String id() {
+        return id;
+    }
+
+    /**
+     * Returns tenant ID.
+     *
+     * @return tenant ID
+     */
+    public String tenantId() {
+        return tenantId;
+    }
+
+    /**
+     * Returns subnet ID.
+     *
+     * @return subnet ID
+     */
+    public String subnetId() {
+        return subnetId;
+    }
+
+    /**
+     * Returns port ID.
+     *
+     * @return port ID
+     */
+    public String portId() {
+        return portId;
+    }
+
+    /**
+     * An Openstack Router Interface Builder class.
+     */
+    public static final class Builder {
+        private String id;
+        private String tenantId;
+        private String subnetId;
+        private String portId;
+
+        /**
+         * Sets Router Interface ID.
+         *
+         * @param id router interface ID
+         * @return Builder object
+         */
+        public Builder id(String id) {
+            this.id = id;
+            return this;
+        }
+
+        /**
+         * Sets tenant ID.
+         *
+         * @param tenantId tenant ID
+         * @return Builder object
+         */
+        public Builder tenantId(String tenantId) {
+            this.tenantId = tenantId;
+            return this;
+        }
+
+        /**
+         * Sets subnet ID.
+         *
+         * @param subnetId subnet ID
+         * @return Builder object
+         */
+        public Builder subnetId(String subnetId) {
+            this.subnetId = subnetId;
+            return this;
+        }
+
+        /**
+         * Sets port ID.
+         *
+         * @param portId port ID
+         * @return Builder object
+         */
+        public Builder portId(String portId) {
+            this.portId = portId;
+            return this;
+        }
+
+
+        /**
+         * Builds an Openstack Router Interface object.
+         *
+         * @return OpenstackRouterInterface object
+         */
+        public OpenstackRouterInterface build() {
+            return new OpenstackRouterInterface(id, tenantId, subnetId, portId);
+        }
+
+    }
+}

+/*
+ * Copyright 2016 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.openstackrouting;
+
+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.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.apache.felix.scr.annotations.Service;
+import org.onlab.packet.Ethernet;
+import org.onlab.packet.IPv4;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.core.CoreService;
+import org.onosproject.net.driver.DriverService;
+import org.onosproject.net.packet.InboundPacket;
+import org.onosproject.net.packet.PacketContext;
+import org.onosproject.net.packet.PacketProcessor;
+import org.onosproject.net.packet.PacketService;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+import static org.onlab.util.Tools.groupedThreads;
+
+@Service
+@Component(immediate = true)
+/**
+ * Populates flow rules about L3 functionality for VMs in Openstack.
+ */
+public class OpenstackRoutingManager implements OpenstackRoutingService {
+    private static Logger log = LoggerFactory
+            .getLogger(OpenstackRoutingManager.class);
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected CoreService coreService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected PacketService packetService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected DriverService driverService;
+
+    private ApplicationId appId;
+    private OpenstackICMPHandler icmpHandler;
+    private OpenstackPNATHandler natHandler;
+    private OpenstackFloatingIPHandler floatingIPHandler;
+    private OpenstackRoutingRulePopulator openstackRoutingRulePopulator;
+
+    private InternalPacketProcessor internalPacketProcessor = new InternalPacketProcessor();
+    private ExecutorService l3EventExcutorService =
+            Executors.newSingleThreadExecutor(groupedThreads("onos/openstackrouting", "L3-event"));
+    private ExecutorService icmpEventExcutorService =
+            Executors.newSingleThreadExecutor(groupedThreads("onos/openstackrouting", "icmp-event"));
+
+    @Activate
+    protected void activate() {
+        appId = coreService.registerApplication("org.onosproject.openstackrouting");
+        packetService.addProcessor(internalPacketProcessor, PacketProcessor.director(1));
+
+        log.info("onos-openstackrouting started");
+    }
+
+    @Deactivate
+    protected void deactivate() {
+        packetService.removeProcessor(internalPacketProcessor);
+        log.info("onos-openstackrouting stopped");
+    }
+
+
+    @Override
+    public void createFloatingIP(OpenstackFloatingIP openstackFloatingIP) {
+
+    }
+
+    @Override
+    public void updateFloatingIP(OpenstackFloatingIP openstackFloatingIP) {
+
+    }
+
+    @Override
+    public void deleteFloatingIP(String id) {
+
+    }
+
+    @Override
+    public void createRouter(OpenstackRouter openstackRouter) {
+
+    }
+
+    @Override
+    public void updateRouter(OpenstackRouter openstackRouter) {
+
+    }
+
+    @Override
+    public void deleteRouter(String id) {
+
+    }
+
+    @Override
+    public void createRouterInterface(OpenstackRouterInterface openstackRouterInterface) {
+
+    }
+
+    @Override
+    public void updateRouterInterface(OpenstackRouterInterface openstackRouterInterface) {
+
+    }
+
+    @Override
+    public void deleteRouterInterface(String id) {
+
+    }
+
+    private class InternalPacketProcessor implements PacketProcessor {
+
+        @Override
+        public void process(PacketContext context) {
+
+            if (context.isHandled()) {
+                return;
+            }
+
+            InboundPacket pkt = context.inPacket();
+            Ethernet ethernet = pkt.parsed();
+
+            if (ethernet != null && ethernet.getEtherType() == Ethernet.TYPE_IPV4) {
+                IPv4 iPacket = (IPv4) ethernet.getPayload();
+                switch (iPacket.getProtocol()) {
+                    case IPv4.PROTOCOL_ICMP:
+                        icmpEventExcutorService.execute(new OpenstackICMPHandler(context));
+                        break;
+                    default:
+                        l3EventExcutorService.execute(new OpenstackPNATHandler(context));
+                        break;
+                }
+
+            }
+
+
+        }
+    }
+
+}

+/*
+ * Copyright 2016 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.openstackrouting;
+
+/**
+ * Populates Routing Flow Rules.
+ */
+public class OpenstackRoutingRulePopulator {
+}

+/*
+ * Copyright 2016 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.openstackrouting;
+
+/**
+ * The Interface of Openstack Routing.
+ */
+public interface OpenstackRoutingService {
+
+    /**
+     * Stores the Floating IP information created by Openstack.
+     *
+     * @param openstackFloatingIP Floating IP information
+     */
+    void createFloatingIP(OpenstackFloatingIP openstackFloatingIP);
+
+    /**
+     * Updates flow rules corresponding to the Floating IP information updated by Openstack.
+     *
+     * @param openstackFloatingIP Floating IP information
+     */
+    void updateFloatingIP(OpenstackFloatingIP openstackFloatingIP);
+
+    /**
+     * Removes flow rules corresponding to Floating IP information deleted by Openstack.
+     *
+     * @param id Deleted Floating IP`s ID
+     */
+    void deleteFloatingIP(String id);
+
+    /**
+     * Stores the router information created by Openstack.
+     *
+     * @param openstackRouter Floating IP information
+     */
+    void createRouter(OpenstackRouter openstackRouter);
+
+    /**
+     * Updates flow rules corresponding to the router information updated by Openstack.
+     *
+     * @param openstackRouter Router information
+     */
+    void updateRouter(OpenstackRouter openstackRouter);
+
+    /**
+     * Removes flow rules corresponding to the router information deleted by Openstack.
+     *
+     * @param id Deleted router`s ID
+     */
+    void deleteRouter(String id);
+
+    /**
+     * Stores the router information created by Openstack.
+     *
+     * @param openstackRouterInterface Floating IP information
+     */
+    void createRouterInterface(OpenstackRouterInterface openstackRouterInterface);
+
+    /**
+     * Updates flow rules corresponding to the router information updated by Openstack.
+     *
+     * @param openstackRouterInterface Router information
+     */
+    void updateRouterInterface(OpenstackRouterInterface openstackRouterInterface);
+
+    /**
+     * Removes flow rules corresponding to the router information deleted by Openstack.
+     *
+     * @param id Deleted router`s ID
+     */
+    void deleteRouterInterface(String id);
+
+
+}

+/*
+ * Copyright 2016 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.
+ */
+
+/**
+ * Application for OpenstackRouting.
+ */
+package org.onosproject.openstackrouting;
\ No newline at end of file

@@ -65,6 +65,7 @@
         <module>cpman</module>
         <module>cpman</module>
         <module>events</module>
         <module>events</module>
         <module>vrouter</module>
         <module>vrouter</module>
+        <module>openstackrouting</module>
   </modules>
   </modules>
 
 
     <properties>
     <properties>