[ONOS-2287,ONOS-2288]Pcep TunnelProvider implementation

Change-Id: I4184336c200f1060e93be5dc28076ba35f6b98f4

@@ -85,6 +85,23 @@ public class ConnectPoint {
     }
     }
 
 
     /**
     /**
+     * Returns the identifier of the infrastructure device if the connection
+     * point belongs to a network element which is indeed an ip of pcc
+     * client identifier.
+     *
+     * @return network element identifier as a pcc client identifier
+     * @throws java.lang.IllegalStateException if connection point is not
+     *                                         associated with a pcc client
+     */
+    public IpElementId ipElementId() {
+        if (elementId instanceof IpElementId) {
+            return (IpElementId) elementId;
+        }
+        throw new IllegalStateException("Connection point not associated " +
+                                                "with an pcc client");
+    }
+
+    /**
      * Returns the connection port number.
      * Returns the connection port number.
      *
      *
      * @return port number
      * @return port number

+package org.onosproject.net;
+
+import java.util.Objects;
+import org.onlab.packet.IpAddress;
+import com.google.common.base.MoreObjects;
+
+/**
+ * Represent for a Element ID using ip address.
+ */
+public final class IpElementId extends ElementId {
+
+    private final IpAddress ipAddress;
+
+    /**
+     * Public construction is prohibited.
+     * @param ipAddress ip address
+     */
+    private IpElementId(IpAddress ipAddress) {
+        this.ipAddress = ipAddress;
+    }
+
+    /**
+     * Create a IP Element ID.
+     * @param ipAddress IP address
+     * @return IpElementId
+     */
+    public static IpElementId ipElement(IpAddress ipAddress) {
+        return new IpElementId(ipAddress);
+    }
+
+    /**
+     * Returns the ip address.
+     *
+     * @return ipAddress
+     */
+    public IpAddress ipAddress() {
+        return ipAddress;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(ipAddress);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof IpElementId) {
+            final IpElementId other = (IpElementId) obj;
+            return Objects.equals(this.ipAddress, other.ipAddress);
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass()).add("ipAddress", ipAddress).toString();
+    }
+}

@@ -220,5 +220,4 @@ public class PcepFactoryVer1 implements PcepFactory {
     public PcepLabelRangeResvMsg.Builder buildPcepLabelRangeResvMsg() {
     public PcepLabelRangeResvMsg.Builder buildPcepLabelRangeResvMsg() {
         return new PcepLabelRangeResvMsgVer1.Builder();
         return new PcepLabelRangeResvMsgVer1.Builder();
     }
     }
-
 }
 }

 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 <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-pcep-providers</artifactId>
-		<version>1.3.0-SNAPSHOT</version>
-		<relativePath>../pom.xml</relativePath>
-	</parent>
-	<artifactId>onos-pcep-provider-tunnel</artifactId>
-	<packaging>bundle</packaging>
+    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-pcep-providers</artifactId>
+        <version>1.3.0-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+    <artifactId>onos-pcep-provider-tunnel</artifactId>
+    <packaging>bundle</packaging>
     <description>PCEP-based tunnel provider</description>
     <description>PCEP-based tunnel provider</description>
-	<dependencies>
-		<dependency>
-			<groupId>org.onosproject</groupId>
-			<artifactId>onos-app-pcep-api</artifactId>
-		</dependency>
-	</dependencies>
+    <dependencies>
+        <dependency>
+            <groupId>org.onosproject</groupId>
+            <artifactId>onos-app-pcep-api</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.onosproject</groupId>
+            <artifactId>onos-pcep-controller-api</artifactId>
+        </dependency>
+    </dependencies>
 </project>
 </project>
\ No newline at end of file

+/*
+ * 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.provider.pcep.tunnel.impl;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.commons.collections.map.MultiKeyMap;
+import org.onosproject.incubator.net.tunnel.TunnelId;
+import org.onosproject.incubator.net.tunnel.TunnelProviderService;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Entity to provide tunnel DB and mapping for request/response between CORE to PCEP
+ * and PCEP to PCC.
+ */
+public class PcepTunnelApiMapper {
+    protected static final Logger log = LoggerFactory.getLogger(PcepTunnelApiMapper.class);
+
+    static final String PROVIDER_ID = "org.onosproject.provider.tunnel.pcep";
+    // Map to store all the tunnel requests.
+    private Map<Integer, PcepTunnelData> tunnelRequestQueue;
+    //Map to store all core related tunnel requests.
+    private Map<TunnelId, PcepTunnelData> coreTunnelRequestQueue;
+    //Map to store all the created tunnels.
+    private Map<Integer, PcepTunnelData> tunnelDB;
+    // Map to store the tunnel ids, given by core and given by pcc.
+    private Map<TunnelId, Integer> tunnelIdMap;
+    //Map to store all the learnt tunnels.
+    private MultiKeyMap pccTunnelDB = new MultiKeyMap();
+
+    TunnelProviderService tunnelApiMapperservice;
+
+    /**
+     * Default constructor.
+     */
+    public PcepTunnelApiMapper() {
+        //TODO check if the map need to initialize
+        tunnelRequestQueue = new HashMap<Integer, PcepTunnelData>();
+        coreTunnelRequestQueue = new HashMap<TunnelId, PcepTunnelData>();
+        tunnelDB = new HashMap<Integer, PcepTunnelData>();
+        tunnelIdMap = new HashMap<TunnelId, Integer>();
+    }
+
+    /**
+     * Add tunnels to tunnel Request queues.
+     *
+     * @param srpId srp id
+     * @param pcepTunnelData pcep tunnel data
+     */
+    public void addToTunnelRequestQueue(int srpId, PcepTunnelData pcepTunnelData) {
+        tunnelRequestQueue.put(new Integer(srpId), pcepTunnelData);
+        log.debug("Tunnel Added to TunnelRequestQueue");
+    }
+
+    /**
+     * Map between Tunnel ID and pcc provided Tunnel ID.
+     *
+     * @param pcepTunnelData pcep tunnel data
+     */
+    public void addToTunnelIdMap(PcepTunnelData pcepTunnelData) {
+        int value = pcepTunnelData.statefulIpv4IndentifierTlv().getTunnelId() & 0xFFFF;
+        tunnelIdMap.put(pcepTunnelData.tunnel().tunnelId(), (new Integer(value)));
+        log.debug("Tunnel ID Added to tunnelIdMap");
+    }
+
+    /**
+     * Add tunnels to core tunnel request queue.
+     *
+     * @param pcepTunnelData pcep tunnel data
+     */
+    public void addToCoreTunnelRequestQueue(PcepTunnelData pcepTunnelData) {
+        coreTunnelRequestQueue.put(pcepTunnelData.tunnel().tunnelId(), pcepTunnelData);
+        log.debug("Tunnel Added to CoreTunnelRequestQueue");
+    }
+
+    /**
+     * Removes tunnels from the core tunnel request queue.
+     *
+     * @param tunnelId tunnel id
+     */
+    public void removeFromCoreTunnelRequestQueue(TunnelId tunnelId) {
+        coreTunnelRequestQueue.remove(tunnelId);
+        log.debug("Tunnnel create response sent to core and removed from CoreTunnelRequestQueue");
+    }
+
+    /**
+     * Handle the report which comes after initiate message.
+     *
+     * @param srpId srp id
+     * @param pcepTunnelData pcep tunnel data
+     */
+    public void handleCreateTunnelRequestQueue(int srpId, PcepTunnelData pcepTunnelData) {
+
+        int value = tunnelIdMap.get(pcepTunnelData.tunnel().tunnelId());
+        tunnelDB.put(new Integer(value), pcepTunnelData);
+        tunnelRequestQueue.remove(new Integer(srpId), pcepTunnelData);
+        log.debug("Tunnel Added to TunnelDBQueue and removed from TunnelRequestQueue. tunnel id {}"
+                + (new Integer(value)).toString());
+    }
+
+    /**
+     * Handle report which comes for update message.
+     *
+     * @param srpId srp id
+     * @param pcepTunnelData pcep tunnel data
+     */
+    public void handleUpdateTunnelRequestQueue(int srpId, PcepTunnelData pcepTunnelData) {
+        if (pcepTunnelData.rptFlag()) {
+            pcepTunnelData.setRptFlag(false);
+            int value = tunnelIdMap.get(pcepTunnelData.tunnel().tunnelId());
+            tunnelDB.put(new Integer(value), pcepTunnelData);
+            tunnelRequestQueue.remove(new Integer(srpId), pcepTunnelData);
+            log.debug("Tunnel Added to TunnelDBQueue and removed from TunnelRequestQueue. tunnel id {}" ,
+                      (new Integer(value)).toString());
+        } else {
+            pcepTunnelData.setRptFlag(true);
+            tunnelRequestQueue.put(new Integer(srpId), pcepTunnelData);
+            log.debug("Tunnel updated in TunnelRequestQueue");
+        }
+    }
+
+    /**
+     * Handle report for tunnel Release request.
+     *
+     * @param srpId srp id
+     * @param pcepTunnelData pcep tunnel data
+     */
+    public void handleRemoveFromTunnelRequestQueue(int srpId, PcepTunnelData pcepTunnelData) {
+
+        int value = tunnelIdMap.get(pcepTunnelData.tunnel().tunnelId());
+        tunnelIdMap.remove(pcepTunnelData.tunnel().tunnelId());
+        tunnelDB.remove(new Integer(value));
+        tunnelRequestQueue.remove(srpId);
+        log.debug("Tunnel removed from  TunnelDBQueue and TunnelRequestQueue");
+    }
+
+    /**
+     * Returns PcepTunnelData from the tunnel request queue.
+     *
+     * @param srpId srp id
+     * @return PcepTunnelData pcep tunnel data
+     */
+    public PcepTunnelData getDataFromTunnelRequestQueue(int srpId) {
+        return tunnelRequestQueue.get(new Integer(srpId));
+
+    }
+
+    /**
+     * Returns PcepTunnelData from the tunnel DB.
+     *
+     * @param tunnelId tunnel id
+     * @return PcepTunnelData pcep tunnel data
+     */
+    public PcepTunnelData getDataFromTunnelDBQueue(TunnelId tunnelId) {
+        int value = tunnelIdMap.get(tunnelId);
+        return tunnelDB.get((new Integer(value)));
+    }
+
+    /**
+     * Checks whether the tunnel exist in tunnel request queue.
+     *
+     * @param srpId srp id
+     * @return true if tunnel exist in reuest queue, false otherwise
+     */
+    public boolean checkFromTunnelRequestQueue(int srpId) {
+        boolean retValue = tunnelRequestQueue.containsKey(srpId);
+        return retValue;
+    }
+
+    /**
+     * Returns whether tunnel exist in tunnel db.
+     *
+     * @param tunnelId
+     * @return true/false
+     */
+    public boolean checkFromTunnelDBQueue(TunnelId tunnelId) {
+        int value = tunnelIdMap.get(tunnelId);
+        boolean retValue = tunnelDB.containsKey((new Integer(value)));
+        return retValue;
+    }
+
+    /**
+     * Add Learnt tunnels to pcc tunnel DB.
+     *
+     * @param pcepTunnelData pcep tunnel data
+     */
+    public void addPccTunnelDB(PcepTunnelData pcepTunnelData) {
+        pccTunnelDB.put(pcepTunnelData.statefulIpv4IndentifierTlv().getTunnelId() & 0xFFFFL,
+                        pcepTunnelData.statefulIpv4IndentifierTlv().getIpv4IngressAddress(), pcepTunnelData);
+    }
+}

+/*
+ * 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.provider.pcep.tunnel.impl;
+
+import java.util.Objects;
+
+import org.onosproject.incubator.net.tunnel.Tunnel;
+import org.onosproject.net.ElementId;
+import org.onosproject.net.Path;
+import org.onosproject.pcepio.types.StatefulIPv4LspIdentidiersTlv;
+
+import com.google.common.base.MoreObjects;
+
+/**
+ * To store all tunnel related information from Core and Path computation client.
+ */
+public class PcepTunnelData {
+
+    private Tunnel tunnel;
+    private Path path;
+    private int plspId;
+    private ElementId elementId;
+    private RequestType requestType;
+    private boolean rptFlag;
+
+    // data need to store from LSP object
+    private boolean lspAFlag;
+    private boolean lspDFlag;
+    private byte lspOFlag;
+    private short tunnelId;
+    private int extTunnelId;
+    private short lspId;
+    private StatefulIPv4LspIdentidiersTlv statefulIpv4IndentifierTlv;
+
+    /**
+     * Default constructor.
+     */
+    public PcepTunnelData() {
+        this.elementId = null;
+        this.tunnel = null;
+        this.path = null;
+        this.requestType = null;
+        this.rptFlag = false;
+        this.plspId = 0;
+    }
+
+    /**
+     * Constructor to initialize Tunnel, Path and Request type.
+     *
+     * @param tunnel mpls tunnel
+     * @param path Path in network
+     * @param requestType request type for tunnel
+     */
+    public PcepTunnelData(Tunnel tunnel, Path path, RequestType requestType) {
+        this.tunnel = tunnel;
+        this.path = path;
+        this.requestType = requestType;
+    }
+
+    /**
+     * Constructor to initialize ElemendId, Tunnel, Path and Request type.
+     *
+     * @param elementId Ip element id
+     * @param tunnel mpls tunnel
+     * @param path Path in network
+     * @param requestType request type for tunnel
+     */
+    public PcepTunnelData(ElementId elementId, Tunnel tunnel, Path path, RequestType requestType) {
+        this.elementId = elementId;
+        this.tunnel = tunnel;
+        this.path = path;
+        this.requestType = requestType;
+    }
+
+    /**
+     * Constructor to initialize Tunnel and Request type.
+     *
+     * @param tunnel Tunnel from core
+     * @param requestType request type for tunnel
+     */
+    public PcepTunnelData(Tunnel tunnel, RequestType requestType) {
+        this.tunnel = tunnel;
+        this.requestType = requestType;
+    }
+
+    /**
+     * Constructor to initialize ElementId, Tunnel and Request type.
+     *
+     * @param elementId Ip element id
+     * @param tunnel mpls tunnel
+     * @param requestType request type for tunnel
+     */
+    public PcepTunnelData(ElementId elementId, Tunnel tunnel, RequestType requestType) {
+        this.elementId = elementId;
+        this.tunnel = tunnel;
+        this.requestType = requestType;
+    }
+
+    /**
+     * Sets ip element id.
+     *
+     * @param elementId Ip element id
+     */
+    public void setElementId(ElementId elementId) {
+        this.elementId = elementId;
+    }
+
+    /**
+     * Sets tunnel.
+     *
+     * @param tunnel mpls tunnel
+     */
+    public void setTunnel(Tunnel tunnel) {
+        this.tunnel = tunnel;
+    }
+
+    /**
+     * Sets Path.
+     *
+     * @param path Path in network
+     */
+    public void setPath(Path path) {
+        this.path = path;
+    }
+
+    /**
+     * Request type for tunnel.
+     *
+     * @param requestType request type for tunnel
+     */
+    public void setRequestType(RequestType requestType) {
+        this.requestType = requestType;
+    }
+
+    /**
+     * Sets plspid generated from pcc.
+     *
+     * @param plspId plsp identifier
+     */
+    public void setPlspId(int plspId) {
+        this.plspId = plspId;
+    }
+
+    /**
+     * Sets A flag from lsp object.
+     *
+     * @param value A flag value
+     */
+    public void setLspAFlag(boolean value) {
+        this.lspAFlag = value;
+    }
+
+    /**
+     * Sets OF flag from lsp object.
+     *
+     * @param value OF flag value
+     */
+    public void setLspOFlag(byte value) {
+        this.lspOFlag = value;
+    }
+
+    /**
+     * Sets tunnel id from PCC.
+     *
+     * @param value tunnel id value
+     */
+    public void setTunnelId(short value) {
+        this.tunnelId = value;
+    }
+
+    /**
+     * Sets extended tunnel id from PCC.
+     *
+     * @param value extended tunnel id value
+     */
+    public void setExtTunnelId(int value) {
+        this.extTunnelId = value;
+    }
+
+    /**
+     * Sets lsp id from pcc.
+     *
+     * @param value lsp id
+     */
+    public void setLspId(short value) {
+        this.lspId = value;
+    }
+
+    /**
+     * Sets statefulIpv4Identifiers tlv.
+     * @param value statefulIpv4Identifiers tlv
+     */
+    public void setStatefulIpv4IndentifierTlv(StatefulIPv4LspIdentidiersTlv value) {
+        this.statefulIpv4IndentifierTlv = value;
+    }
+
+    /**
+     * Sets report flag.
+     *
+     * @param rptFlag report flag
+     */
+    public void setRptFlag(boolean rptFlag) {
+        this.rptFlag = rptFlag;
+    }
+
+    /**
+     * Sets D flag from lsp object.
+     *
+     * @param value D flag value
+     */
+    public void setLspDFlag(boolean value) {
+        this.lspDFlag = value;
+    }
+
+    /**
+     * To get Ip element id.
+     *
+     * @return Ip elemend id
+     */
+    public ElementId elementId() {
+        return this.elementId;
+    }
+
+    /**
+     * To get Tunnel.
+     *
+     * @return tunnel
+     */
+    public Tunnel tunnel() {
+        return this.tunnel;
+    }
+
+    /**
+     * To get Path.
+     *
+     * @return path
+     */
+    public Path path() {
+        return this.path;
+    }
+
+    /**
+     * To get request type.
+     *
+     * @return request type
+     */
+    public RequestType requestType() {
+        return this.requestType;
+    }
+
+    /**
+     * To get pLspId.
+     *
+     * @return pLspId
+     */
+    public int plspId() {
+        return this.plspId;
+    }
+
+    /**
+     * To get A flag.
+     *
+     * @return A flag
+     */
+    public boolean lspAFlag() {
+        return this.lspAFlag;
+    }
+
+    /**
+     * To get OF flag.
+     *
+     * @return OF flag
+     */
+    public byte lspOFlag() {
+        return this.lspOFlag;
+    }
+
+    /**
+     * To get tunnel id.
+     *
+     * @return tunnel id
+     */
+    public short tunnelId() {
+        return this.tunnelId;
+    }
+
+    /**
+     * To get extended tunnel id.
+     *
+     * @return extended tunnel id
+     */
+    public int extTunnelId() {
+        return this.extTunnelId;
+    }
+
+    /**
+     * To get pLspId.
+     *
+     * @return pLspId
+     */
+    public short lspId() {
+        return this.lspId;
+    }
+
+    /**
+     * To get D Flag.
+     *
+     * @return d flag
+     */
+    public boolean lspDFlag() {
+        return this.lspDFlag;
+    }
+
+    /**
+     * To get statefulIpv4Indentifier tlv.
+     *
+     * @return statefulIpv4Indentifier tlv
+     */
+    public StatefulIPv4LspIdentidiersTlv statefulIpv4IndentifierTlv() {
+        return this.statefulIpv4IndentifierTlv;
+    }
+
+    /**
+     * To get report flag.
+     *
+     * @return report flag
+     */
+    public boolean rptFlag() {
+        return this.rptFlag;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+
+        if (obj instanceof PcepTunnelData) {
+            PcepTunnelData other = (PcepTunnelData) obj;
+            return Objects.equals(tunnel, other.tunnel)
+                    && Objects.equals(path, other.path)
+                    && Objects.equals(plspId, other.plspId)
+                    && Objects.equals(elementId, other.elementId)
+                    && Objects.equals(requestType, other.requestType)
+                    && Objects.equals(rptFlag, other.rptFlag)
+                    && Objects.equals(lspAFlag, other.lspAFlag)
+                    && Objects.equals(lspDFlag, other.lspDFlag)
+                    && Objects.equals(lspOFlag, other.lspOFlag)
+                    && Objects.equals(tunnelId, other.tunnelId)
+                    && Objects.equals(extTunnelId, other.extTunnelId)
+                    && Objects.equals(lspId, other.lspId)
+                    && Objects.equals(statefulIpv4IndentifierTlv, other.statefulIpv4IndentifierTlv);
+        }
+
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(tunnel, path, plspId, elementId, requestType, rptFlag, lspAFlag,
+                            lspDFlag, lspOFlag, tunnelId, extTunnelId, lspId, statefulIpv4IndentifierTlv);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass()).add("Tunnel", tunnel)
+                .add("Path", path).add("PlspId", plspId).add("ElementId", elementId)
+                .add("RequestType", requestType).add("RptFlag", rptFlag).add("LspAFlag", lspAFlag)
+                .add("LspDFlag", lspDFlag).add("LspOFlag", lspOFlag).add("TunnelId", tunnelId)
+                .add("ExtTunnelid", extTunnelId).add("LspId", lspId)
+                .add("StatefulIpv4IndentifierTlv", statefulIpv4IndentifierTlv).toString();
+    }
+}

+/*
+ * 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.provider.pcep.tunnel.impl;
+
+/**
+ * Enum of request types between pcc and pcep.
+ */
+public enum RequestType {
+    /**
+     * Specifies the request type for PCC is to create new tunnel.
+     */
+    CREATE,
+
+    /**
+     * Specifies the request type for PCC is to update existing tunnel.
+     */
+    UPDATE,
+
+    /**
+     * Specifies the request type for PCC is to delete existing tunnel.
+     */
+    DELETE,
+
+    /**
+     * Specifies the request type for PCC to report existing tunnel.
+     */
+    LSP_STATE_RPT;
+}
\ No newline at end of file

+/*
+ * 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.provider.pcep.tunnel.impl;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+import java.util.concurrent.atomic.AtomicInteger;
+
+import org.slf4j.Logger;
+
+/**
+ * Unique Srp Id generator for pcep messages.
+ */
+public final class SrpIdGenerators {
+
+    private static final Logger log = getLogger(SrpIdGenerators.class);
+    private static final AtomicInteger SRP_ID_GEN = new AtomicInteger();
+    private static final int MAX_SRP_ID = 0x7FFFFFFF;
+    private static int srpId;
+
+    /**
+     * Default constructor.
+     */
+    private SrpIdGenerators() {
+    }
+
+    /**
+     * Get the next srp id.
+     *
+     * @return srp id
+     */
+    public static int create() {
+        do {
+            if (srpId >= MAX_SRP_ID) {
+                if (SRP_ID_GEN.get() >= MAX_SRP_ID) {
+                    SRP_ID_GEN.set(0);
+                }
+            }
+            srpId = SRP_ID_GEN.incrementAndGet();
+        } while (srpId > MAX_SRP_ID);
+        return srpId;
+    }
+}