PeerConnectivityManager.java
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/*
* Copyright 2014-present 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.sdnip;
import org.onlab.packet.Ethernet;
import org.onlab.packet.IPv4;
import org.onlab.packet.IPv6;
import org.onlab.packet.IpAddress;
import org.onlab.packet.IpPrefix;
import org.onlab.packet.TpPort;
import org.onlab.packet.VlanId;
import org.onosproject.core.ApplicationId;
import org.onosproject.incubator.net.intf.Interface;
import org.onosproject.incubator.net.intf.InterfaceEvent;
import org.onosproject.incubator.net.intf.InterfaceListener;
import org.onosproject.incubator.net.intf.InterfaceService;
import org.onosproject.net.ConnectPoint;
import org.onosproject.net.config.NetworkConfigEvent;
import org.onosproject.net.config.NetworkConfigListener;
import org.onosproject.net.config.NetworkConfigService;
import org.onosproject.net.flow.DefaultTrafficSelector;
import org.onosproject.net.flow.DefaultTrafficTreatment;
import org.onosproject.net.flow.TrafficSelector;
import org.onosproject.net.flow.TrafficTreatment;
import org.onosproject.net.host.InterfaceIpAddress;
import org.onosproject.net.intent.IntentUtils;
import org.onosproject.net.intent.Key;
import org.onosproject.net.intent.PointToPointIntent;
import org.onosproject.routing.IntentSynchronizationService;
import org.onosproject.routing.RoutingService;
import org.onosproject.routing.config.BgpConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* Manages the connectivity requirements between peers.
*/
public class PeerConnectivityManager {
private static final int PRIORITY_OFFSET = 1000;
private static final String SUFFIX_DST = "dst";
private static final String SUFFIX_SRC = "src";
private static final String SUFFIX_ICMP = "icmp";
private static final Logger log = LoggerFactory.getLogger(
PeerConnectivityManager.class);
private static final short BGP_PORT = 179;
private final IntentSynchronizationService intentSynchronizer;
private final NetworkConfigService configService;
private final InterfaceService interfaceService;
private final ApplicationId appId;
private final ApplicationId routerAppId;
private final Map<Key, PointToPointIntent> peerIntents;
private final InternalNetworkConfigListener configListener
= new InternalNetworkConfigListener();
private final InternalInterfaceListener interfaceListener
= new InternalInterfaceListener();
/**
* Creates a new PeerConnectivityManager.
*
* @param appId the application ID
* @param intentSynchronizer the intent synchronizer
* @param configService the network config service
* @param routerAppId application ID
* @param interfaceService the interface service
*/
public PeerConnectivityManager(ApplicationId appId,
IntentSynchronizationService intentSynchronizer,
NetworkConfigService configService,
ApplicationId routerAppId,
InterfaceService interfaceService) {
this.appId = appId;
this.intentSynchronizer = intentSynchronizer;
this.configService = configService;
this.routerAppId = routerAppId;
this.interfaceService = interfaceService;
peerIntents = new HashMap<>();
}
/**
* Starts the peer connectivity manager.
*/
public void start() {
configService.addListener(configListener);
interfaceService.addListener(interfaceListener);
setUpConnectivity();
}
/**
* Stops the peer connectivity manager.
*/
public void stop() {
configService.removeListener(configListener);
interfaceService.removeListener(interfaceListener);
}
/**
* Sets up paths to establish connectivity between all internal
* BGP speakers and external BGP peers.
*/
private void setUpConnectivity() {
BgpConfig config = configService.getConfig(routerAppId, RoutingService.CONFIG_CLASS);
Set<BgpConfig.BgpSpeakerConfig> bgpSpeakers;
if (config == null) {
log.warn("No BGP config available");
bgpSpeakers = Collections.emptySet();
} else {
bgpSpeakers = config.bgpSpeakers();
}
Map<Key, PointToPointIntent> existingIntents = new HashMap<>(peerIntents);
for (BgpConfig.BgpSpeakerConfig bgpSpeaker : bgpSpeakers) {
log.debug("Start to set up BGP paths for BGP speaker: {}",
bgpSpeaker);
buildSpeakerIntents(bgpSpeaker).forEach(i -> {
PointToPointIntent intent = existingIntents.remove(i.key());
if (intent == null || !IntentUtils.intentsAreEqual(i, intent)) {
peerIntents.put(i.key(), i);
intentSynchronizer.submit(i);
}
});
}
// Remove any remaining intents that we used to have that we don't need
// anymore
existingIntents.values().forEach(i -> {
peerIntents.remove(i.key());
intentSynchronizer.withdraw(i);
});
}
private Collection<PointToPointIntent> buildSpeakerIntents(BgpConfig.BgpSpeakerConfig speaker) {
List<PointToPointIntent> intents = new ArrayList<>();
// Get the BGP Speaker VLAN Id
VlanId bgpSpeakerVlanId = speaker.vlan();
for (IpAddress peerAddress : speaker.peers()) {
Interface peeringInterface = interfaceService.getMatchingInterface(peerAddress);
if (peeringInterface == null) {
log.debug("No peering interface found for peer {} on speaker {}",
peerAddress, speaker);
continue;
}
IpAddress bgpSpeakerAddress = null;
for (InterfaceIpAddress address : peeringInterface.ipAddressesList()) {
if (address.subnetAddress().contains(peerAddress)) {
bgpSpeakerAddress = address.ipAddress();
break;
}
}
checkNotNull(bgpSpeakerAddress);
VlanId peerVlanId = peeringInterface.vlan();
intents.addAll(buildIntents(speaker.connectPoint(), bgpSpeakerVlanId,
bgpSpeakerAddress,
peeringInterface.connectPoint(),
peerVlanId,
peerAddress));
}
return intents;
}
/**
* Builds the required intents between a BGP speaker and an external router.
*
* @param portOne the BGP speaker connect point
* @param vlanOne the BGP speaker VLAN
* @param ipOne the BGP speaker IP address
* @param portTwo the external BGP peer connect point
* @param vlanTwo the external BGP peer VLAN
* @param ipTwo the external BGP peer IP address
* @return the intents to install
*/
private Collection<PointToPointIntent> buildIntents(ConnectPoint portOne,
VlanId vlanOne,
IpAddress ipOne,
ConnectPoint portTwo,
VlanId vlanTwo,
IpAddress ipTwo) {
List<PointToPointIntent> intents = new ArrayList<>();
TrafficTreatment.Builder treatmentToPeer = DefaultTrafficTreatment.builder();
TrafficTreatment.Builder treatmentToSpeaker = DefaultTrafficTreatment.builder();
TrafficSelector selector;
Key key;
byte tcpProtocol;
byte icmpProtocol;
if (ipOne.isIp4()) {
tcpProtocol = IPv4.PROTOCOL_TCP;
icmpProtocol = IPv4.PROTOCOL_ICMP;
} else {
tcpProtocol = IPv6.PROTOCOL_TCP;
icmpProtocol = IPv6.PROTOCOL_ICMP6;
}
// Add VLAN treatment for traffic going from BGP speaker to BGP peer
if (!vlanOne.equals(vlanTwo)) {
if (vlanTwo.equals(VlanId.NONE)) {
treatmentToPeer.popVlan();
} else {
treatmentToPeer.setVlanId(vlanTwo);
}
}
// Path from BGP speaker to BGP peer matching destination TCP port 179
selector = buildSelector(tcpProtocol,
vlanOne,
ipOne,
ipTwo,
null,
BGP_PORT);
key = buildKey(ipOne, ipTwo, SUFFIX_DST);
intents.add(PointToPointIntent.builder()
.appId(appId)
.key(key)
.selector(selector)
.treatment(treatmentToPeer.build())
.ingressPoint(portOne)
.egressPoint(portTwo)
.priority(PRIORITY_OFFSET)
.build());
// Path from BGP speaker to BGP peer matching source TCP port 179
selector = buildSelector(tcpProtocol,
vlanOne,
ipOne,
ipTwo,
BGP_PORT,
null);
key = buildKey(ipOne, ipTwo, SUFFIX_SRC);
intents.add(PointToPointIntent.builder()
.appId(appId)
.key(key)
.selector(selector)
.treatment(treatmentToPeer.build())
.ingressPoint(portOne)
.egressPoint(portTwo)
.priority(PRIORITY_OFFSET)
.build());
// ICMP path from BGP speaker to BGP peer
selector = buildSelector(icmpProtocol,
vlanOne,
ipOne,
ipTwo,
null,
null);
key = buildKey(ipOne, ipTwo, SUFFIX_ICMP);
intents.add(PointToPointIntent.builder()
.appId(appId)
.key(key)
.selector(selector)
.treatment(treatmentToPeer.build())
.ingressPoint(portOne)
.egressPoint(portTwo)
.priority(PRIORITY_OFFSET)
.build());
// Add VLAN treatment for traffic going from BGP peer to BGP speaker
if (!vlanTwo.equals(vlanOne)) {
if (vlanOne.equals(VlanId.NONE)) {
treatmentToSpeaker.popVlan();
} else {
treatmentToSpeaker.setVlanId(vlanOne);
}
}
// Path from BGP peer to BGP speaker matching destination TCP port 179
selector = buildSelector(tcpProtocol,
vlanTwo,
ipTwo,
ipOne,
null,
BGP_PORT);
key = buildKey(ipTwo, ipOne, SUFFIX_DST);
intents.add(PointToPointIntent.builder()
.appId(appId)
.key(key)
.selector(selector)
.treatment(treatmentToSpeaker.build())
.ingressPoint(portTwo)
.egressPoint(portOne)
.priority(PRIORITY_OFFSET)
.build());
// Path from BGP peer to BGP speaker matching source TCP port 179
selector = buildSelector(tcpProtocol,
vlanTwo,
ipTwo,
ipOne,
BGP_PORT,
null);
key = buildKey(ipTwo, ipOne, SUFFIX_SRC);
intents.add(PointToPointIntent.builder()
.appId(appId)
.key(key)
.selector(selector)
.treatment(treatmentToSpeaker.build())
.ingressPoint(portTwo)
.egressPoint(portOne)
.priority(PRIORITY_OFFSET)
.build());
// ICMP path from BGP peer to BGP speaker
selector = buildSelector(icmpProtocol,
vlanTwo,
ipTwo,
ipOne,
null,
null);
key = buildKey(ipTwo, ipOne, SUFFIX_ICMP);
intents.add(PointToPointIntent.builder()
.appId(appId)
.key(key)
.selector(selector)
.treatment(treatmentToSpeaker.build())
.ingressPoint(portTwo)
.egressPoint(portOne)
.priority(PRIORITY_OFFSET)
.build());
return intents;
}
/**
* Builds a traffic selector based on the set of input parameters.
*
* @param ipProto IP protocol
* @param srcIp source IP address
* @param dstIp destination IP address
* @param srcTcpPort source TCP port, or null if shouldn't be set
* @param dstTcpPort destination TCP port, or null if shouldn't be set
* @return the new traffic selector
*/
private TrafficSelector buildSelector(byte ipProto, VlanId ingressVlanId,
IpAddress srcIp,
IpAddress dstIp, Short srcTcpPort,
Short dstTcpPort) {
TrafficSelector.Builder builder = DefaultTrafficSelector.builder().matchIPProtocol(ipProto);
// Match on any VLAN Id if a VLAN Id configured on the ingress interface
if (!ingressVlanId.equals(VlanId.NONE)) {
builder.matchVlanId(VlanId.ANY);
}
if (dstIp.isIp4()) {
builder.matchEthType(Ethernet.TYPE_IPV4)
.matchIPSrc(IpPrefix.valueOf(srcIp, IpPrefix.MAX_INET_MASK_LENGTH))
.matchIPDst(IpPrefix.valueOf(dstIp, IpPrefix.MAX_INET_MASK_LENGTH));
} else {
builder.matchEthType(Ethernet.TYPE_IPV6)
.matchIPv6Src(IpPrefix.valueOf(srcIp, IpPrefix.MAX_INET6_MASK_LENGTH))
.matchIPv6Dst(IpPrefix.valueOf(dstIp, IpPrefix.MAX_INET6_MASK_LENGTH));
}
if (srcTcpPort != null) {
builder.matchTcpSrc(TpPort.tpPort(srcTcpPort));
}
if (dstTcpPort != null) {
builder.matchTcpDst(TpPort.tpPort(dstTcpPort));
}
return builder.build();
}
/**
* Builds an intent Key for a point-to-point intent based off the source
* and destination IP address, as well as a suffix String to distinguish
* between different types of intents between the same source and
* destination.
*
* @param srcIp source IP address
* @param dstIp destination IP address
* @param suffix suffix string
* @return intent key
*/
private Key buildKey(IpAddress srcIp, IpAddress dstIp, String suffix) {
String keyString = new StringBuilder()
.append(srcIp.toString())
.append("-")
.append(dstIp.toString())
.append("-")
.append(suffix)
.toString();
return Key.of(keyString, appId);
}
private class InternalNetworkConfigListener implements NetworkConfigListener {
@Override
public void event(NetworkConfigEvent event) {
switch (event.type()) {
case CONFIG_REGISTERED:
break;
case CONFIG_UNREGISTERED:
break;
case CONFIG_ADDED:
case CONFIG_UPDATED:
case CONFIG_REMOVED:
if (event.configClass() == RoutingService.CONFIG_CLASS) {
setUpConnectivity();
}
break;
default:
break;
}
}
}
private class InternalInterfaceListener implements InterfaceListener {
@Override
public void event(InterfaceEvent event) {
switch (event.type()) {
case INTERFACE_ADDED:
case INTERFACE_UPDATED:
case INTERFACE_REMOVED:
setUpConnectivity();
break;
default:
break;
}
}
}
}