[Emu] [ONOS-2591,ONOS-2594] Implementation of BGP channel handler to manage each…

… BGP peer connection.

Change-Id: I14e90c9437f676698f89da79e736a81035689492

@@ -25,6 +25,21 @@ import org.onosproject.bgpio.protocol.BGPMessage;
 public interface BGPController {
 public interface BGPController {
 
 
     /**
     /**
+     * Returns list of bgp peers connected to this BGP controller.
+     *
+     * @return Iterable of BGPPeer elements
+     */
+    Iterable<BGPPeer> getPeers();
+
+    /**
+     * Returns the actual bgp peer for the given ip address.
+     *
+     * @param bgpId the id of the bgp peer to fetch
+     * @return the interface to this bgp peer
+     */
+    BGPPeer getPeer(BGPId bgpId);
+
+    /**
      * Send a message to a particular bgp peer.
      * Send a message to a particular bgp peer.
      *
      *
      * @param bgpId the id of the peer to send message.
      * @param bgpId the id of the peer to send message.
@@ -41,9 +56,22 @@ public interface BGPController {
     void processBGPPacket(BGPId bgpId, BGPMessage msg);
     void processBGPPacket(BGPId bgpId, BGPMessage msg);
 
 
     /**
     /**
+     * Close all connected BGP peers.
+     *
+     */
+    void closeConnectedPeers();
+
+    /**
      * Get the BGPConfig class to the caller.
      * Get the BGPConfig class to the caller.
      *
      *
      * @return configuration object
      * @return configuration object
      */
      */
     BGPCfg getConfig();
     BGPCfg getConfig();
+
+    /**
+     * Get the BGP connected peers to this controller.
+     *
+     * @return the integer number
+     */
+    int getBGPConnNumber();
 }
 }
\ 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.bgp.controller;
+import java.util.List;
+import org.jboss.netty.channel.Channel;
+import org.onosproject.bgpio.protocol.BGPMessage;
+import org.onosproject.bgpio.protocol.BGPVersion;
+
+/**
+ * Represents the peer side of an bgp peer.
+ *
+ */
+public interface BGPPeer {
+
+    /**
+     * Sets the BGP version for this bgp peer.
+     *
+     * @param bgpVersion the version to set.
+     */
+    void setBgpPeerVersion(BGPVersion bgpVersion);
+
+    /**
+     * Gets the BGP version for this bgp peer.
+     *
+     * @return bgp identifier.
+     */
+    int getBgpPeerIdentifier();
+
+    /**
+     * Sets the associated Netty channel for this bgp peer.
+     *
+     * @param channel the Netty channel
+     */
+    void setChannel(Channel channel);
+
+    /**
+     * Gets the associated Netty channel handler for this bgp peer.
+     *
+     * @return Channel channel connected.
+     */
+    Channel getChannel();
+
+    /**
+     * Sets the AS Number for this bgp peer.
+     *
+     * @param peerASNum the autonomous system number value to set.
+     */
+    void setBgpPeerASNum(short peerASNum);
+
+    /**
+     * Sets the hold time for this bgp peer.
+     *
+     * @param peerHoldTime the hold timer value to set.
+     */
+    void setBgpPeerHoldTime(short peerHoldTime);
+
+    /**
+     * Sets the peer identifier value.
+     *
+     * @param peerIdentifier the bgp peer identifier value.
+     */
+    void setBgpPeerIdentifier(int peerIdentifier);
+
+    /**
+     * Sets whether the bgp peer is connected.
+     *
+     * @param connected whether the bgp peer is connected
+     */
+    void setConnected(boolean connected);
+
+    /**
+     * Initialises the behaviour.
+     *
+     * @param bgpId id of bgp peer
+     * @param bgpVersion BGP version
+     * @param pktStats packet statistics
+     */
+    void init(BGPId bgpId, BGPVersion bgpVersion, BGPPacketStats pktStats);
+
+    /**
+     * Checks whether the handshake is complete.
+     *
+     * @return true is finished, false if not.
+     */
+    boolean isHandshakeComplete();
+
+    /**
+     * Writes the message to the peer.
+     *
+     * @param msg the message to write
+     */
+    void sendMessage(BGPMessage msg);
+
+    /**
+     * Writes the BGPMessage list to the peer.
+     *
+     * @param msgs the messages to be written
+     */
+    void sendMessage(List<BGPMessage> msgs);
+
+    /**
+     * Gets a string version of the ID for this bgp peer.
+     *
+     * @return string version of the ID
+     */
+    String getStringId();
+
+    /**
+     * Gets the ipAddress of the peer.
+     *
+     * @return the peer bgpId in IPAddress format
+     */
+    BGPId getBGPId();
+
+    /**
+     * Checks if the bgp peer is still connected.
+     *
+     * @return whether the bgp peer is still connected
+     */
+    boolean isConnected();
+
+    /**
+     * Disconnects the bgp peer by closing the TCP connection. Results in a call to the channel handler's
+     * channelDisconnected method for cleanup
+     */
+    void disconnectPeer();
+
+    /**
+     * Identifies the channel used to communicate with the bgp peer.
+     *
+     * @return string representation of the connection to the peer
+     */
+    String channelId();
+
+    /**
+     * Gets the negotiated hold time.
+     *
+     * @return the negotiated hold time
+     */
+    int getNegotiatedHoldTime();
+
+    /**
+     * Sets negotiated hold time for the peer.
+     *
+     * @param negotiatedHoldTime negotiated hold time
+     */
+    void setNegotiatedHoldTime(short negotiatedHoldTime);
+}

@@ -61,27 +61,6 @@ public interface BGPMessage extends Writeable {
         BGPMessage build() throws BGPParseException;
         BGPMessage build() throws BGPParseException;
 
 
         /**
         /**
-         * Returns BGP Version of BGP Message.
-         *
-         * @return BGP Version of BGP Message
-         */
-        BGPVersion getVersion();
-
-        /**
-         * Returns BGP Type of BGP Message.
-         *
-         * @return BGP Type of BGP Message
-         */
-        BGPType getType();
-
-        /**
-         * Returns BGP Header of BGP Message.
-         *
-         * @return BGP Header of BGP Message
-         */
-        BGPHeader getHeader();
-
-        /**
          * Sets BgpHeader and return its builder.
          * Sets BgpHeader and return its builder.
          *
          *
          * @param bgpMsgHeader BGP Message Header
          * @param bgpMsgHeader BGP Message Header

@@ -17,16 +17,24 @@
 package org.onosproject.bgp.controller.impl;
 package org.onosproject.bgp.controller.impl;
 
 
 import static org.onlab.util.Tools.groupedThreads;
 import static org.onlab.util.Tools.groupedThreads;
+
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Executors;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
 import org.apache.felix.scr.annotations.Activate;
 import org.apache.felix.scr.annotations.Activate;
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Deactivate;
 import org.apache.felix.scr.annotations.Deactivate;
 import org.apache.felix.scr.annotations.Service;
 import org.apache.felix.scr.annotations.Service;
+import org.onlab.packet.IpAddress;
 import org.onosproject.bgp.controller.BGPCfg;
 import org.onosproject.bgp.controller.BGPCfg;
 import org.onosproject.bgp.controller.BGPController;
 import org.onosproject.bgp.controller.BGPController;
 import org.onosproject.bgp.controller.BGPId;
 import org.onosproject.bgp.controller.BGPId;
+import org.onosproject.bgp.controller.BGPPacketStats;
+import org.onosproject.bgp.controller.BGPPeer;
 import org.onosproject.bgpio.protocol.BGPMessage;
 import org.onosproject.bgpio.protocol.BGPMessage;
+import org.onosproject.bgpio.protocol.BGPVersion;
 import org.slf4j.Logger;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.slf4j.LoggerFactory;
 
 
@@ -42,8 +50,10 @@ public class BGPControllerImpl implements BGPController {
 
 
     private final ExecutorService executorBarrier = Executors.newFixedThreadPool(4,
     private final ExecutorService executorBarrier = Executors.newFixedThreadPool(4,
                                                                                  groupedThreads("onos/bgp",
                                                                                  groupedThreads("onos/bgp",
-                                                                                         "event-barrier-%d"));
+                                                                                                "event-barrier-%d"));
+    protected ConcurrentHashMap<BGPId, BGPPeer> connectedPeers = new ConcurrentHashMap<BGPId, BGPPeer>();
 
 
+    protected BGPPeerManager peerManager = new BGPPeerManager();
     final Controller ctrl = new Controller(this);
     final Controller ctrl = new Controller(this);
 
 
     private BGPConfig bgpconfig = new BGPConfig();
     private BGPConfig bgpconfig = new BGPConfig();
@@ -57,11 +67,22 @@ public class BGPControllerImpl implements BGPController {
     @Deactivate
     @Deactivate
     public void deactivate() {
     public void deactivate() {
         // Close all connected peers
         // Close all connected peers
+        closeConnectedPeers();
         this.ctrl.stop();
         this.ctrl.stop();
         log.info("Stopped");
         log.info("Stopped");
     }
     }
 
 
     @Override
     @Override
+    public Iterable<BGPPeer> getPeers() {
+        return this.connectedPeers.values();
+    }
+
+    @Override
+    public BGPPeer getPeer(BGPId bgpId) {
+        return this.connectedPeers.get(bgpId);
+    }
+
+    @Override
     public void writeMsg(BGPId bgpId, BGPMessage msg) {
     public void writeMsg(BGPId bgpId, BGPMessage msg) {
         // TODO: Send message
         // TODO: Send message
     }
     }
@@ -88,17 +109,167 @@ public class BGPControllerImpl implements BGPController {
         }
         }
     }
     }
 
 
+    @Override
+    public void closeConnectedPeers() {
+        BGPPeer bgpPeer;
+        for (BGPId id : this.connectedPeers.keySet()) {
+            bgpPeer = getPeer(id);
+            bgpPeer.disconnectPeer();
+        }
+    }
+
     /**
     /**
-     * Get controller instance.
-     *
-     * @return ctrl the controller.
+     * Implementation of an BGP Peer which is responsible for keeping track of connected peers and the state in which
+     * they are.
      */
      */
+    public class BGPPeerManager {
+
+        private final Logger log = LoggerFactory.getLogger(BGPPeerManager.class);
+        private final Lock peerLock = new ReentrantLock();
+
+        /**
+         * Add a BGP peer that has just connected to the system.
+         *
+         * @param bgpId the id of bgp peer to add
+         * @param bgpPeer the actual bgp peer object.
+         * @return true if added, false otherwise.
+         */
+        public boolean addConnectedPeer(BGPId bgpId, BGPPeer bgpPeer) {
+
+            if (connectedPeers.get(bgpId) != null) {
+                this.log.error("Trying to add connectedPeer but found previous " + "value for bgp ip: {}",
+                               bgpId.toString());
+                return false;
+            } else {
+                this.log.debug("Added Peer {}", bgpId.toString());
+                connectedPeers.put(bgpId, bgpPeer);
+                return true;
+            }
+        }
+
+        /**
+         * Checks if the activation for this bgp peer is valid.
+         *
+         * @param bgpId the id of bgp peer to check
+         * @return true if valid, false otherwise
+         */
+        public boolean isPeerConnected(BGPId bgpId) {
+            if (connectedPeers.get(bgpId) == null) {
+                this.log.error("Trying to activate peer but is not in " + "connected peer: bgpIp {}. Aborting ..",
+                               bgpId.toString());
+                return false;
+            }
+
+            return true;
+        }
+
+        /**
+         * Checks if the activation for this bgp peer is valid.
+         *
+         * @param routerid the routerid of bgp peer to check
+         * @return true if valid, false otherwise
+         */
+        public boolean isPeerConnected(String routerid) {
+
+            final BGPId bgpId;
+            bgpId = BGPId.bgpId(IpAddress.valueOf(routerid));
+
+            if (connectedPeers.get(bgpId) != null) {
+                this.log.info("Peer connection exist ");
+                return true;
+            }
+            this.log.info("Initiate connect request to " + "peer: bgpIp {}", bgpId.toString());
+
+            return false;
+        }
+
+        /**
+         * Clear all state in controller peer maps for a bgp peer that has
+         * disconnected from the local controller.
+         *
+         * @param bgpId the id of bgp peer to remove.
+         */
+        public void removeConnectedPeer(BGPId bgpId) {
+            connectedPeers.remove(bgpId);
+        }
+
+        /**
+         * Clear all state in controller peer maps for a bgp peer that has
+         * disconnected from the local controller.
+         *
+         * @param routerid the router id of bgp peer to remove.
+         */
+        public void removeConnectedPeer(String routerid) {
+            final BGPId bgpId;
+
+            bgpId = BGPId.bgpId(IpAddress.valueOf(routerid));
+
+            connectedPeers.remove(bgpId);
+        }
+
+        /**
+          * Gets bgp peer for connected peer map.
+          *
+          * @param routerid router id
+          * @return peer if available, null otherwise
+          */
+        public BGPPeer getPeer(String routerid) {
+            final BGPId bgpId;
+            bgpId = BGPId.bgpId(IpAddress.valueOf(routerid));
+
+            return connectedPeers.get(bgpId);
+        }
+
+        /**
+          * Gets bgp peer instance.
+          *
+          * @param bgpId bgp identifier.
+          * @param pv bgp version.
+          * @param pktStats packet statistics.
+          * @return BGPPeer peer instance.
+          */
+        public BGPPeer getBGPPeerInstance(BGPId bgpId, BGPVersion pv, BGPPacketStats pktStats) {
+            BGPPeer bgpPeer = new BGPPeerImpl();
+            bgpPeer.init(bgpId, pv, pktStats);
+            return bgpPeer;
+        }
+
+    }
+
+    /**
+      * Gets controller instance.
+      *
+      * @return Controller instance.
+      */
     public Controller getController() {
     public Controller getController() {
         return ctrl;
         return ctrl;
     }
     }
 
 
+    /**
+      * Gets connected peers.
+      *
+      * @return connectedPeers from connected Peers Map.
+      */
+    public ConcurrentHashMap<BGPId, BGPPeer> getConnectedPeers() {
+        return connectedPeers;
+    }
+
+    /**
+      * Gets peer manager.
+      *
+      * @return peerManager.
+      */
+    public BGPPeerManager getPeerManager() {
+        return peerManager;
+    }
+
     @Override
     @Override
     public BGPCfg getConfig() {
     public BGPCfg getConfig() {
         return this.bgpconfig;
         return this.bgpconfig;
     }
     }
+
+    @Override
+    public int getBGPConnNumber() {
+        return connectedPeers.size();
+    }
 }
 }
\ 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.bgp.controller.impl;
+
+import java.util.Timer;
+import java.util.TimerTask;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Implement sending keepalive message to connected peer periodically based on negotiated holdtime.
+ */
+public class BGPKeepAliveTimer {
+
+    private Timer keepAliveTimer;
+    private BGPChannelHandler handler;
+    private static final Logger log = LoggerFactory.getLogger(BGPKeepAliveTimer.class);
+
+    /**
+     * Gets keepalive timer object.
+     *
+     * @return keepAliveTimer keepalive timer.
+     */
+    public Timer getKeepAliveTimer() {
+        return keepAliveTimer;
+    }
+
+    /**
+     * Initialize timer to send keepalive message periodically.
+     *
+     * @param h channel handler
+     * @param seconds time interval.
+     */
+    public BGPKeepAliveTimer(BGPChannelHandler h, int seconds) {
+        this.handler = h;
+        this.keepAliveTimer = new Timer();
+        this.keepAliveTimer.schedule(new SendKeepAlive(), 0, seconds * 1000);
+    }
+
+    /**
+     * Send keepalive message to connected peer on schedule.
+     */
+    class SendKeepAlive extends TimerTask {
+        @Override
+        public void run() {
+            log.debug("Sending periodic KeepAlive");
+
+            try {
+                // Send keep alive message
+                handler.sendKeepAliveMessage();
+                handler.getBgpPacketStats().addOutPacket();
+            } catch (Exception e) {
+                log.info("Exception occured while sending keepAlive message" + e.toString());
+            }
+        }
+    }
+}

@@ -43,8 +43,7 @@ public class BGPPacketStatsImpl implements BGPPacketStats {
     /**
     /**
      * Get the outgoing packet count number.
      * Get the outgoing packet count number.
      *
      *
-     * @return
-     *          packet count
+     * @return packet count
      */
      */
     public int outPacketCount() {
     public int outPacketCount() {
         return outPacketCount;
         return outPacketCount;
@@ -53,8 +52,7 @@ public class BGPPacketStatsImpl implements BGPPacketStats {
     /**
     /**
      * Get the incoming packet count number.
      * Get the incoming packet count number.
      *
      *
-     * @return
-     *          packet count
+     * @return packet count
      */
      */
     public int inPacketCount() {
     public int inPacketCount() {
         return inPacketCount;
         return inPacketCount;
@@ -63,8 +61,7 @@ public class BGPPacketStatsImpl implements BGPPacketStats {
     /**
     /**
      * Get the wrong packet count number.
      * Get the wrong packet count number.
      *
      *
-     * @return
-     *          packet count
+     * @return packet count
      */
      */
     public int wrongPacketCount() {
     public int wrongPacketCount() {
         return wrongPacketCount;
         return wrongPacketCount;
@@ -110,8 +107,7 @@ public class BGPPacketStatsImpl implements BGPPacketStats {
     /**
     /**
      * Get the time.
      * Get the time.
      *
      *
-     * @return
-     *          time
+     * @return time
      */
      */
     public long getTime() {
     public long getTime() {
         return this.time;
         return this.time;

+/*
+ * 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.bgp.controller.impl;
+
+import java.net.InetSocketAddress;
+import java.net.SocketAddress;
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.RejectedExecutionException;
+
+import org.jboss.netty.channel.Channel;
+import org.onlab.packet.IpAddress;
+import org.onosproject.bgp.controller.BGPId;
+import org.onosproject.bgp.controller.BGPPacketStats;
+import org.onosproject.bgp.controller.BGPPeer;
+import org.onosproject.bgpio.protocol.BGPMessage;
+import org.onosproject.bgpio.protocol.BGPVersion;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.common.base.MoreObjects;
+
+/**
+ * BGPPeerImpl implements BGPPeer, maintains peer information and store updates in RIB .
+ */
+public class BGPPeerImpl implements BGPPeer {
+
+    protected final Logger log = LoggerFactory.getLogger(BGPPeerImpl.class);
+
+    private static final String SHUTDOWN_MSG = "Worker has already been shutdown";
+
+    private Channel channel;
+    protected String channelId;
+    private boolean connected;
+    protected boolean isHandShakeComplete = false;
+    public BGPSessionInfo sessionInfo;
+    private BGPPacketStatsImpl pktStats;
+
+    @Override
+    public void init(BGPId bgpId, BGPVersion bgpVersion, BGPPacketStats pktStats) {
+        this.sessionInfo.setRemoteBgpId(bgpId);
+        this.sessionInfo.setRemoteBgpVersion(bgpVersion);
+        this.pktStats = (BGPPacketStatsImpl) pktStats;
+        this.sessionInfo = new BGPSessionInfo();
+    }
+
+    // ************************
+    // Channel related
+    // ************************
+
+    @Override
+    public final void disconnectPeer() {
+        this.channel.close();
+    }
+
+    @Override
+    public final void sendMessage(BGPMessage m) {
+        log.debug("Sending message to {}", channel.getRemoteAddress());
+        try {
+            channel.write(Collections.singletonList(m));
+            this.pktStats.addOutPacket();
+        } catch (RejectedExecutionException e) {
+            log.warn(e.getMessage());
+            if (!e.getMessage().contains(SHUTDOWN_MSG)) {
+                throw e;
+            }
+        }
+    }
+
+    @Override
+    public final void sendMessage(List<BGPMessage> msgs) {
+        try {
+            channel.write(msgs);
+            this.pktStats.addOutPacket(msgs.size());
+        } catch (RejectedExecutionException e) {
+            log.warn(e.getMessage());
+            if (!e.getMessage().contains(SHUTDOWN_MSG)) {
+                throw e;
+            }
+        }
+    }
+
+    @Override
+    public final boolean isConnected() {
+        return this.connected;
+    }
+
+    @Override
+    public final void setConnected(boolean connected) {
+        this.connected = connected;
+    };
+
+    @Override
+    public final void setChannel(Channel channel) {
+        this.channel = channel;
+        final SocketAddress address = channel.getRemoteAddress();
+        if (address instanceof InetSocketAddress) {
+            final InetSocketAddress inetAddress = (InetSocketAddress) address;
+            final IpAddress ipAddress = IpAddress.valueOf(inetAddress.getAddress());
+            if (ipAddress.isIp4()) {
+                channelId = ipAddress.toString() + ':' + inetAddress.getPort();
+            } else {
+                channelId = '[' + ipAddress.toString() + "]:" + inetAddress.getPort();
+            }
+        }
+    };
+
+    @Override
+    public final Channel getChannel() {
+        return this.channel;
+    };
+
+    @Override
+    public String channelId() {
+        return channelId;
+    }
+
+    // ************************
+    // BGP Peer features related
+    // ************************
+
+    @Override
+    public final BGPId getBGPId() {
+        return this.sessionInfo.getRemoteBgpId();
+    };
+
+    @Override
+    public final String getStringId() {
+        return this.sessionInfo.getRemoteBgpId().toString();
+    }
+
+    @Override
+    public final void setBgpPeerVersion(BGPVersion peerVersion) {
+        this.sessionInfo.setRemoteBgpVersion(peerVersion);
+    }
+
+    @Override
+    public void setBgpPeerASNum(short peerASNum) {
+        this.sessionInfo.setRemoteBgpASNum(peerASNum);
+    }
+
+    @Override
+    public void setBgpPeerHoldTime(short peerHoldTime) {
+        this.sessionInfo.setRemoteBgpHoldTime(peerHoldTime);
+    }
+
+    @Override
+    public void setBgpPeerIdentifier(int peerIdentifier) {
+        this.sessionInfo.setRemoteBgpIdentifier(peerIdentifier);
+    }
+
+    @Override
+    public int getBgpPeerIdentifier() {
+        return this.sessionInfo.getRemoteBgpIdentifier();
+    }
+
+    @Override
+    public int getNegotiatedHoldTime() {
+        return this.sessionInfo.getNegotiatedholdTime();
+    }
+
+    @Override
+    public void setNegotiatedHoldTime(short negotiatedHoldTime) {
+        this.sessionInfo.setNegotiatedholdTime(negotiatedHoldTime);
+    }
+
+    @Override
+    public boolean isHandshakeComplete() {
+        return isHandShakeComplete;
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass()).omitNullValues().add("channel", channelId())
+                .add("bgpId", getBGPId()).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.bgp.controller.impl;
+
+import org.onosproject.bgp.controller.BGPId;
+import org.onosproject.bgpio.protocol.BGPVersion;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Class maintains BGP peer session info.
+ */
+public class BGPSessionInfo {
+
+    protected final Logger log = LoggerFactory.getLogger(BGPSessionInfo.class);
+    private BGPId remoteBgpId;
+    private BGPVersion remoteBgpVersion;
+    private short remoteBgpASNum;
+    private short remoteBgpholdTime;
+    private int remoteBgpIdentifier;
+    private short negotiatedholdTime;
+
+    /**
+     * Gets the negotiated hold time for the session.
+     *
+     * @return negotiated hold time.
+     */
+    public short getNegotiatedholdTime() {
+        return negotiatedholdTime;
+    }
+
+    /**
+     * Sets the negotiated hold time for the session.
+     *
+     * @param negotiatedholdTime negotiated hold time.
+     */
+    public void setNegotiatedholdTime(short negotiatedholdTime) {
+        this.negotiatedholdTime = negotiatedholdTime;
+    }
+
+    /**
+     * Gets the BGP ID of BGP peer.
+     *
+     * @return bgp ID.
+     */
+    public BGPId getRemoteBgpId() {
+        return remoteBgpId;
+    }
+
+    /**
+     * Sets the BGP ID of bgp peer.
+     *
+     * @param bgpId BGP ID to set.
+     */
+    public void setRemoteBgpId(BGPId bgpId) {
+        log.debug("Remote BGP ID {}", bgpId);
+        this.remoteBgpId = bgpId;
+    }
+
+    /**
+     * Gets the BGP version of peer.
+     *
+     * @return bgp version.
+     */
+    public BGPVersion getRemoteBgpVersion() {
+        return remoteBgpVersion;
+    }
+
+    /**
+     * Sets the BGP version for this bgp peer.
+     *
+     * @param bgpVersion bgp version to set.
+     */
+    public void setRemoteBgpVersion(BGPVersion bgpVersion) {
+        log.debug("Remote BGP version {}", bgpVersion);
+        this.remoteBgpVersion = bgpVersion;
+    }
+
+    /**
+     * Gets the BGP remote bgp AS number.
+     *
+     * @return remoteBgpASNum peer AS number.
+     */
+    public short getRemoteBgpASNum() {
+        return remoteBgpASNum;
+    }
+
+    /**
+     * Sets the AS Number for this bgp peer.
+     *
+     * @param bgpASNum the autonomous system number value to set.
+     */
+    public void setRemoteBgpASNum(short bgpASNum) {
+        log.debug("Remote BGP AS number {}", bgpASNum);
+        this.remoteBgpASNum = bgpASNum;
+    }
+
+    /**
+     * Gets the BGP peer hold time.
+     *
+     * @return bgp hold time.
+     */
+    public short getRemoteBgpHoldTime() {
+        return remoteBgpholdTime;
+    }
+
+    /**
+     * Sets the hold time for this bgp peer.
+     *
+     * @param holdTime the hold timer value to set.
+     */
+    public void setRemoteBgpHoldTime(short holdTime) {
+        log.debug("Remote BGP HoldTime {}", holdTime);
+        this.remoteBgpholdTime = holdTime;
+    }
+
+    /**
+     * Gets the BGP version for this bgp peer.
+     *
+     * @return bgp identifier.
+     */
+    public int getRemoteBgpIdentifier() {
+        return remoteBgpIdentifier;
+    }
+
+    /**
+     * Sets the peer identifier value.
+     *
+     * @param bgpIdentifier the bgp peer identifier value.
+     */
+    public void setRemoteBgpIdentifier(int bgpIdentifier) {
+        log.debug("Remote BGP Identifier {}", bgpIdentifier);
+        this.remoteBgpIdentifier = bgpIdentifier;
+    }
+}