| /* |
| * 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.bgprouter; |
| |
| import com.google.common.collect.ConcurrentHashMultiset; |
| import com.google.common.collect.Multiset; |
| 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.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.onlab.packet.Ethernet; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.core.CoreService; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.net.flow.DefaultFlowRule; |
| import org.onosproject.net.flow.DefaultTrafficSelector; |
| import org.onosproject.net.flow.DefaultTrafficTreatment; |
| import org.onosproject.net.flow.FlowRule; |
| import org.onosproject.net.flow.FlowRuleService; |
| import org.onosproject.net.flow.TrafficSelector; |
| import org.onosproject.net.flow.TrafficTreatment; |
| import org.onosproject.net.group.DefaultGroupBucket; |
| import org.onosproject.net.group.DefaultGroupDescription; |
| import org.onosproject.net.group.Group; |
| import org.onosproject.net.group.GroupBucket; |
| import org.onosproject.net.group.GroupBuckets; |
| import org.onosproject.net.group.GroupDescription; |
| import org.onosproject.net.group.GroupKey; |
| import org.onosproject.net.group.GroupService; |
| import org.onosproject.net.packet.PacketService; |
| import org.onosproject.routing.FibListener; |
| import org.onosproject.routing.FibUpdate; |
| import org.onosproject.routing.RoutingService; |
| import org.onosproject.routing.config.Interface; |
| import org.onosproject.routing.config.RoutingConfigurationService; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * BgpRouter component. |
| */ |
| @Component(immediate = true) |
| public class BgpRouter { |
| |
| private static final Logger log = LoggerFactory.getLogger(BgpRouter.class); |
| |
| private static final String BGP_ROUTER_APP = "org.onosproject.bgprouter"; |
| |
| private static final int PRIORITY = 1; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected FlowRuleService flowService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected GroupService groupService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected RoutingService routingService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected RoutingConfigurationService configService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected PacketService packetService; |
| |
| private ApplicationId appId; |
| |
| private final Multiset<NextHop> nextHops = ConcurrentHashMultiset.create(); |
| private final Map<NextHop, NextHopGroupKey> groups = new HashMap<>(); |
| |
| private DeviceId deviceId = DeviceId.deviceId("of:00000000000000a1"); // TODO config |
| |
| private TunnellingConnectivityManager connectivityManager; |
| |
| @Activate |
| protected void activate() { |
| log.info("Bgp1Router started"); |
| appId = coreService.registerApplication(BGP_ROUTER_APP); |
| |
| connectivityManager = new TunnellingConnectivityManager(appId, |
| configService, |
| packetService); |
| |
| routingService.start(new InternalFibListener()); |
| |
| connectivityManager.start(); |
| |
| log.info("BgpRouter started"); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| routingService.stop(); |
| connectivityManager.stop(); |
| |
| log.info("BgpRouter stopped"); |
| } |
| |
| private void updateFibEntry(Collection<FibUpdate> updates) { |
| for (FibUpdate update : updates) { |
| NextHop nextHop = new NextHop(update.entry().nextHopIp(), |
| update.entry().nextHopMac()); |
| |
| addNextHop(nextHop); |
| |
| TrafficSelector selector = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_IPV4) |
| .matchIPDst(update.entry().prefix()) |
| .build(); |
| |
| // TODO ensure group exists |
| NextHopGroupKey groupKey = groups.get(nextHop); |
| Group group = groupService.getGroup(deviceId, groupKey); |
| if (group == null) { |
| // TODO handle this |
| log.warn("oops, group {} wasn't there"); |
| continue; |
| } |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .group(group.id()) |
| .build(); |
| |
| FlowRule flowRule = new DefaultFlowRule(deviceId, selector, treatment, |
| PRIORITY, appId, 0, true, |
| FlowRule.Type.IP); |
| |
| flowService.applyFlowRules(flowRule); |
| } |
| } |
| |
| private void deleteFibEntry(Collection<FibUpdate> withdraws) { |
| for (FibUpdate update : withdraws) { |
| NextHop nextHop = new NextHop(update.entry().nextHopIp(), |
| update.entry().nextHopMac()); |
| |
| deleteNextHop(nextHop); |
| |
| TrafficSelector selector = DefaultTrafficSelector.builder() |
| .matchIPDst(update.entry().prefix()) |
| .build(); |
| |
| FlowRule flowRule = new DefaultFlowRule(deviceId, selector, null, |
| PRIORITY, appId, 0, true, |
| FlowRule.Type.IP); |
| |
| flowService.removeFlowRules(flowRule); |
| } |
| } |
| |
| private void addNextHop(NextHop nextHop) { |
| if (nextHops.add(nextHop, 1) == 0) { |
| // There was no next hop in the multiset |
| |
| Interface egressIntf = configService.getMatchingInterface(nextHop.ip()); |
| if (egressIntf == null) { |
| log.warn("no egress interface found for {}", nextHop); |
| return; |
| } |
| |
| NextHopGroupKey groupKey = new NextHopGroupKey(nextHop.ip()); |
| groups.put(nextHop, groupKey); |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .setEthSrc(egressIntf.mac()) |
| .setEthDst(nextHop.mac()) |
| .setVlanId(egressIntf.vlan()) |
| .setOutput(egressIntf.connectPoint().port()) |
| .build(); |
| |
| GroupBucket bucket = DefaultGroupBucket.createIndirectGroupBucket(treatment); |
| |
| GroupDescription groupDescription |
| = new DefaultGroupDescription(deviceId, |
| GroupDescription.Type.INDIRECT, |
| new GroupBuckets(Collections |
| .singletonList(bucket)), |
| groupKey, |
| appId); |
| |
| groupService.addGroup(groupDescription); |
| } |
| } |
| |
| private void deleteNextHop(NextHop nextHop) { |
| if (nextHops.remove(nextHop, 1) <= 1) { |
| // There was one or less next hops, so there are now none |
| |
| log.debug("removing group"); |
| |
| GroupKey groupKey = groups.remove(nextHop); |
| groupService.removeGroup(deviceId, groupKey, appId); |
| } |
| } |
| |
| private class InternalFibListener implements FibListener { |
| |
| @Override |
| public void update(Collection<FibUpdate> updates, |
| Collection<FibUpdate> withdraws) { |
| BgpRouter.this.deleteFibEntry(withdraws); |
| BgpRouter.this.updateFibEntry(updates); |
| } |
| } |
| } |