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/*
* 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 static org.onlab.util.Tools.groupedThreads;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutorService;
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.Component;
import org.apache.felix.scr.annotations.Deactivate;
import org.apache.felix.scr.annotations.Service;
import org.onlab.packet.IpAddress;
import org.onosproject.bgp.controller.BGPCfg;
import org.onosproject.bgp.controller.BGPController;
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;
@Component(immediate = true)
@Service
public class BGPControllerImpl implements BGPController {
private static final Logger log = LoggerFactory.getLogger(BGPControllerImpl.class);
private final ExecutorService executorMsgs = Executors.newFixedThreadPool(32,
groupedThreads("onos/bgp",
"event-stats-%d"));
private final ExecutorService executorBarrier = Executors.newFixedThreadPool(4,
groupedThreads("onos/bgp",
"event-barrier-%d"));
protected ConcurrentHashMap<BGPId, BGPPeer> connectedPeers = new ConcurrentHashMap<BGPId, BGPPeer>();
protected BGPPeerManager peerManager = new BGPPeerManager();
final Controller ctrl = new Controller(this);
private BGPConfig bgpconfig = new BGPConfig();
@Activate
public void activate() {
this.ctrl.start();
log.info("Started");
}
@Deactivate
public void deactivate() {
// Close all connected peers
closeConnectedPeers();
this.ctrl.stop();
log.info("Stopped");
}
@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) {
// TODO: Send message
}
@Override
public void processBGPPacket(BGPId bgpId, BGPMessage msg) {
switch (msg.getType()) {
case OPEN:
// TODO: Process Open message
break;
case KEEP_ALIVE:
// TODO: Process keepalive message
break;
case NOTIFICATION:
// TODO: Process notificatoin message
break;
case UPDATE:
// TODO: Process update message
break;
default:
// TODO: Process other message
break;
}
}
@Override
public void closeConnectedPeers() {
BGPPeer bgpPeer;
for (BGPId id : this.connectedPeers.keySet()) {
bgpPeer = getPeer(id);
bgpPeer.disconnectPeer();
}
}
/**
* 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() {
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
public BGPCfg getConfig() {
return this.bgpconfig;
}
@Override
public int getBGPConnNumber() {
return connectedPeers.size();
}
}
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