| /* |
| * Copyright 2014-2015 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.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.onosproject.core.ApplicationId; |
| import org.onosproject.incubator.net.intf.Interface; |
| 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.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| 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(); |
| |
| /** |
| * Creates a new PeerConnectivityManager. |
| * |
| * @param appId the application ID |
| * @param intentSynchronizer the intent synchronizer |
| * @param configService the SDN-IP config service |
| * @param interfaceService the interface service |
| * @param routerAppId application ID |
| */ |
| 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); |
| setUpConnectivity(); |
| } |
| |
| /** |
| * Stops the peer connectivity manager. |
| */ |
| public void stop() { |
| configService.removeListener(configListener); |
| } |
| |
| /** |
| * 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); |
| |
| if (config == null) { |
| log.warn("No BgpConfig found"); |
| return; |
| } |
| |
| Map<Key, PointToPointIntent> existingIntents = new HashMap<>(peerIntents); |
| |
| for (BgpConfig.BgpSpeakerConfig bgpSpeaker : config.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<>(); |
| |
| 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 peeringAddress = null; |
| for (InterfaceIpAddress address : peeringInterface.ipAddresses()) { |
| if (address.subnetAddress().contains(peerAddress)) { |
| peeringAddress = address.ipAddress(); |
| break; |
| } |
| } |
| |
| checkNotNull(peeringAddress); |
| |
| intents.addAll(buildIntents(speaker.connectPoint(), peeringAddress, |
| peeringInterface.connectPoint(), peerAddress)); |
| } |
| |
| return intents; |
| } |
| |
| /** |
| * Builds the required intents between the two pairs of connect points and |
| * IP addresses. |
| * |
| * @param portOne the first connect point |
| * @param ipOne the first IP address |
| * @param portTwo the second connect point |
| * @param ipTwo the second IP address |
| * @return the intents to install |
| */ |
| private Collection<PointToPointIntent> buildIntents(ConnectPoint portOne, |
| IpAddress ipOne, |
| ConnectPoint portTwo, |
| IpAddress ipTwo) { |
| |
| List<PointToPointIntent> intents = new ArrayList<>(); |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.emptyTreatment(); |
| 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; |
| } |
| |
| // Path from BGP speaker to BGP peer matching destination TCP port 179 |
| selector = buildSelector(tcpProtocol, |
| ipOne, |
| ipTwo, |
| null, |
| BGP_PORT); |
| |
| key = buildKey(ipOne, ipTwo, SUFFIX_DST); |
| |
| intents.add(PointToPointIntent.builder() |
| .appId(appId) |
| .key(key) |
| .selector(selector) |
| .treatment(treatment) |
| .ingressPoint(portOne) |
| .egressPoint(portTwo) |
| .priority(PRIORITY_OFFSET) |
| .build()); |
| |
| // Path from BGP speaker to BGP peer matching source TCP port 179 |
| selector = buildSelector(tcpProtocol, |
| ipOne, |
| ipTwo, |
| BGP_PORT, |
| null); |
| |
| key = buildKey(ipOne, ipTwo, SUFFIX_SRC); |
| |
| intents.add(PointToPointIntent.builder() |
| .appId(appId) |
| .key(key) |
| .selector(selector) |
| .treatment(treatment) |
| .ingressPoint(portOne) |
| .egressPoint(portTwo) |
| .priority(PRIORITY_OFFSET) |
| .build()); |
| |
| // Path from BGP peer to BGP speaker matching destination TCP port 179 |
| selector = buildSelector(tcpProtocol, |
| ipTwo, |
| ipOne, |
| null, |
| BGP_PORT); |
| |
| key = buildKey(ipTwo, ipOne, SUFFIX_DST); |
| |
| intents.add(PointToPointIntent.builder() |
| .appId(appId) |
| .key(key) |
| .selector(selector) |
| .treatment(treatment) |
| .ingressPoint(portTwo) |
| .egressPoint(portOne) |
| .priority(PRIORITY_OFFSET) |
| .build()); |
| |
| // Path from BGP peer to BGP speaker matching source TCP port 179 |
| selector = buildSelector(tcpProtocol, |
| ipTwo, |
| ipOne, |
| BGP_PORT, |
| null); |
| |
| key = buildKey(ipTwo, ipOne, SUFFIX_SRC); |
| |
| intents.add(PointToPointIntent.builder() |
| .appId(appId) |
| .key(key) |
| .selector(selector) |
| .treatment(treatment) |
| .ingressPoint(portTwo) |
| .egressPoint(portOne) |
| .priority(PRIORITY_OFFSET) |
| .build()); |
| |
| // ICMP path from BGP speaker to BGP peer |
| selector = buildSelector(icmpProtocol, |
| ipOne, |
| ipTwo, |
| null, |
| null); |
| |
| key = buildKey(ipOne, ipTwo, SUFFIX_ICMP); |
| |
| intents.add(PointToPointIntent.builder() |
| .appId(appId) |
| .key(key) |
| .selector(selector) |
| .treatment(treatment) |
| .ingressPoint(portOne) |
| .egressPoint(portTwo) |
| .priority(PRIORITY_OFFSET) |
| .build()); |
| |
| // ICMP path from BGP peer to BGP speaker |
| selector = buildSelector(icmpProtocol, |
| ipTwo, |
| ipOne, |
| null, |
| null); |
| |
| key = buildKey(ipTwo, ipOne, SUFFIX_ICMP); |
| |
| intents.add(PointToPointIntent.builder() |
| .appId(appId) |
| .key(key) |
| .selector(selector) |
| .treatment(treatment) |
| .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, IpAddress srcIp, |
| IpAddress dstIp, Short srcTcpPort, |
| Short dstTcpPort) { |
| TrafficSelector.Builder builder = DefaultTrafficSelector.builder().matchIPProtocol(ipProto); |
| |
| 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; |
| } |
| } |
| } |
| |
| } |