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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 java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArraySet;
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.onosproject.bgp.controller.BGPCfg;
import org.onosproject.bgp.controller.BGPController;
import org.onosproject.bgp.controller.BGPId;
import org.onosproject.bgp.controller.BGPPeer;
import org.onosproject.bgp.controller.BgpLinkListener;
import org.onosproject.bgp.controller.BgpNodeListener;
import org.onosproject.bgp.controller.BgpPeerManager;
import org.onosproject.bgpio.exceptions.BGPParseException;
import org.onosproject.bgpio.protocol.BGPMessage;
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);
protected ConcurrentHashMap<BGPId, BGPPeer> connectedPeers = new ConcurrentHashMap<BGPId, BGPPeer>();
protected BGPPeerManagerImpl peerManager = new BGPPeerManagerImpl();
protected Set<BgpNodeListener> bgpNodeListener = new CopyOnWriteArraySet<>();
protected Set<BgpLinkListener> bgpLinkListener = new CopyOnWriteArraySet<>();
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 addListener(BgpNodeListener listener) {
this.bgpNodeListener.add(listener);
}
@Override
public void removeListener(BgpNodeListener listener) {
this.bgpNodeListener.remove(listener);
}
@Override
public Set<BgpNodeListener> listener() {
return bgpNodeListener;
}
@Override
public void addLinkListener(BgpLinkListener listener) {
this.bgpLinkListener.add(listener);
}
@Override
public void removeLinkListener(BgpLinkListener listener) {
this.bgpLinkListener.remove(listener);
}
@Override
public Set<BgpLinkListener> linkListener() {
return bgpLinkListener;
}
@Override
public void writeMsg(BGPId bgpId, BGPMessage msg) {
this.getPeer(bgpId).sendMessage(msg);
}
@Override
public void processBGPPacket(BGPId bgpId, BGPMessage msg) throws BGPParseException {
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 BGPPeerManagerImpl implements BgpPeerManager {
private final Logger log = LoggerFactory.getLogger(BGPPeerManagerImpl.class);
private final Lock peerLock = new ReentrantLock();
@Override
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;
}
}
@Override
public boolean isPeerConnected(BGPId bgpId) {
if (connectedPeers.get(bgpId) == null) {
this.log.error("Is peer connected: bgpIp {}.", bgpId.toString());
return false;
}
return true;
}
@Override
public void removeConnectedPeer(BGPId bgpId) {
connectedPeers.remove(bgpId);
}
@Override
public BGPPeer getPeer(BGPId bgpId) {
return connectedPeers.get(bgpId);
}
/**
* Gets bgp peer instance.
*
* @param bgpController controller instance.
* @param sessionInfo bgp session info.
* @param pktStats packet statistics.
* @return BGPPeer peer instance.
*/
public BGPPeer getBGPPeerInstance(BGPController bgpController, BgpSessionInfoImpl sessionInfo,
BGPPacketStatsImpl pktStats) {
BGPPeer bgpPeer = new BGPPeerImpl(bgpController, sessionInfo, pktStats);
return bgpPeer;
}
}
@Override
public ConcurrentHashMap<BGPId, BGPPeer> connectedPeers() {
return connectedPeers;
}
@Override
public BGPPeerManagerImpl peerManager() {
return peerManager;
}
@Override
public BGPCfg getConfig() {
return this.bgpconfig;
}
@Override
public int connectedPeerCount() {
return connectedPeers.size();
}
}
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