| /* |
| * Copyright 2021-present Open Networking Foundation |
| * |
| * 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.kubevirtnetworking.impl; |
| |
| import org.onlab.packet.ARP; |
| import org.onlab.packet.EthType; |
| import org.onlab.packet.Ethernet; |
| import org.onlab.packet.Ip4Address; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.MacAddress; |
| import org.onlab.packet.VlanId; |
| import org.onosproject.cluster.ClusterService; |
| import org.onosproject.cluster.LeadershipService; |
| import org.onosproject.cluster.NodeId; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.core.CoreService; |
| import org.onosproject.kubevirtnetworking.api.KubevirtFlowRuleService; |
| import org.onosproject.kubevirtnetworking.api.KubevirtNetworkAdminService; |
| import org.onosproject.kubevirtnetworking.api.KubevirtPeerRouter; |
| import org.onosproject.kubevirtnetworking.api.KubevirtRouter; |
| import org.onosproject.kubevirtnetworking.api.KubevirtRouterAdminService; |
| import org.onosproject.kubevirtnetworking.api.KubevirtRouterEvent; |
| import org.onosproject.kubevirtnetworking.api.KubevirtRouterListener; |
| import org.onosproject.kubevirtnetworking.util.KubevirtNetworkingUtil; |
| import org.onosproject.kubevirtnode.api.KubevirtNode; |
| import org.onosproject.kubevirtnode.api.KubevirtNodeService; |
| import org.onosproject.net.PortNumber; |
| import org.onosproject.net.device.DeviceService; |
| 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.packet.DefaultOutboundPacket; |
| import org.onosproject.net.packet.InboundPacket; |
| import org.onosproject.net.packet.PacketContext; |
| import org.onosproject.net.packet.PacketProcessor; |
| import org.onosproject.net.packet.PacketService; |
| import org.osgi.service.component.annotations.Activate; |
| import org.osgi.service.component.annotations.Component; |
| import org.osgi.service.component.annotations.Deactivate; |
| import org.osgi.service.component.annotations.Reference; |
| import org.osgi.service.component.annotations.ReferenceCardinality; |
| import org.slf4j.Logger; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Objects; |
| import java.util.concurrent.ExecutorService; |
| |
| import static java.util.concurrent.Executors.newSingleThreadExecutor; |
| import static org.onlab.util.Tools.groupedThreads; |
| import static org.onosproject.kubevirtnetworking.api.Constants.DEFAULT_GATEWAY_MAC; |
| import static org.onosproject.kubevirtnetworking.api.Constants.KUBEVIRT_NETWORKING_APP_ID; |
| import static org.onosproject.kubevirtnetworking.api.Constants.PRE_FLAT_TABLE; |
| import static org.onosproject.kubevirtnetworking.api.Constants.PRIORITY_ARP_GATEWAY_RULE; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Handles arp packet. |
| */ |
| @Component(immediate = true) |
| public class KubevirtRoutingArpHandler { |
| protected final Logger log = getLogger(getClass()); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected ClusterService clusterService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected LeadershipService leadershipService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected PacketService packetService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected DeviceService deviceService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected KubevirtRouterAdminService kubevirtRouterService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected KubevirtNetworkAdminService kubevirtNetworkService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected KubevirtNodeService kubevirtNodeService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected KubevirtFlowRuleService kubevirtFlowRuleService; |
| |
| private final ExecutorService eventExecutor = newSingleThreadExecutor( |
| groupedThreads(this.getClass().getSimpleName(), "event-handler")); |
| |
| private final PacketProcessor packetProcessor = new InternalPacketProcessor(); |
| |
| private final InternalRouterEventListener kubevirtRouterlistener = new InternalRouterEventListener(); |
| |
| private ApplicationId appId; |
| private NodeId localNodeId; |
| |
| |
| @Activate |
| protected void activate() { |
| appId = coreService.registerApplication(KUBEVIRT_NETWORKING_APP_ID); |
| localNodeId = clusterService.getLocalNode().id(); |
| leadershipService.runForLeadership(appId.name()); |
| |
| packetService.addProcessor(packetProcessor, PacketProcessor.director(1)); |
| kubevirtRouterService.addListener(kubevirtRouterlistener); |
| |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| leadershipService.withdraw(appId.name()); |
| packetService.removeProcessor(packetProcessor); |
| kubevirtRouterService.removeListener(kubevirtRouterlistener); |
| |
| eventExecutor.shutdown(); |
| |
| log.info("Stopped"); |
| } |
| /** |
| * Triggers ARP request to retrieve the peer router mac address. |
| * |
| * @param router kubevirt router |
| * @param peerRouterIp peer router IP address |
| */ |
| private void retrievePeerRouterMac(KubevirtRouter router, IpAddress peerRouterIp) { |
| |
| log.info("Sending ARP request to the peer router {} to retrieve the MAC address.", |
| peerRouterIp.getIp4Address().toString()); |
| String routerSnatIp = router.external().keySet().stream().findAny().orElse(null); |
| |
| if (routerSnatIp == null) { |
| return; |
| } |
| |
| IpAddress sourceIp = IpAddress.valueOf(routerSnatIp); |
| |
| MacAddress sourceMac = DEFAULT_GATEWAY_MAC; |
| Ethernet ethRequest = ARP.buildArpRequest(sourceMac.toBytes(), |
| sourceIp.toOctets(), |
| peerRouterIp.toOctets(), VlanId.NO_VID); |
| |
| KubevirtNode gatewayNode = kubevirtNodeService.node(router.electedGateway()); |
| |
| if (gatewayNode == null) { |
| return; |
| } |
| |
| PortNumber externalPatchPortNum = KubevirtNetworkingUtil.externalPatchPortNum(deviceService, gatewayNode); |
| |
| if (externalPatchPortNum == null) { |
| return; |
| } |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .setOutput(externalPatchPortNum) |
| .build(); |
| |
| packetService.emit(new DefaultOutboundPacket( |
| gatewayNode.intgBridge(), |
| treatment, |
| ByteBuffer.wrap(ethRequest.serialize()))); |
| } |
| |
| /** |
| * Sets default ARP flow rule to retrieve peer router mac address. |
| * |
| * @param routerSnatIp route Snat IP |
| * @param peerRouterIp peer router IP |
| * @param gatewayNodeId gateway node |
| * @param install install if true, uninstall otherwise |
| */ |
| private void setRuleArpRequestToController(IpAddress routerSnatIp, |
| IpAddress peerRouterIp, |
| String gatewayNodeId, |
| boolean install) { |
| KubevirtNode gatewayNode = kubevirtNodeService.node(gatewayNodeId); |
| if (gatewayNode == null) { |
| return; |
| } |
| |
| if (routerSnatIp == null) { |
| return; |
| } |
| |
| TrafficSelector selector = DefaultTrafficSelector.builder() |
| .matchEthType(EthType.EtherType.ARP.ethType().toShort()) |
| .matchArpOp(ARP.OP_REPLY) |
| .matchArpSpa(peerRouterIp.getIp4Address()) |
| .matchArpTpa(routerSnatIp.getIp4Address()) |
| .build(); |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .punt() |
| .build(); |
| |
| kubevirtFlowRuleService.setRule( |
| appId, |
| gatewayNode.intgBridge(), |
| selector, |
| treatment, |
| PRIORITY_ARP_GATEWAY_RULE, |
| PRE_FLAT_TABLE, |
| install |
| ); |
| } |
| |
| private class InternalRouterEventListener implements KubevirtRouterListener { |
| private boolean isRelevantHelper() { |
| return Objects.equals(localNodeId, leadershipService.getLeader(appId.name())); |
| } |
| |
| @Override |
| public void event(KubevirtRouterEvent event) { |
| switch (event.type()) { |
| case KUBEVIRT_GATEWAY_NODE_ATTACHED: |
| case KUBEVIRT_ROUTER_EXTERNAL_NETWORK_ATTACHED: |
| eventExecutor.execute(() -> processRouterExternalNetAttachedOrGwAttached(event.subject())); |
| break; |
| case KUBEVIRT_ROUTER_EXTERNAL_NETWORK_DETACHED: |
| eventExecutor.execute(() -> processRouterExternalNetDetached(event.subject(), |
| event.externalIp(), event.externalPeerRouterIp())); |
| break; |
| case KUBEVIRT_GATEWAY_NODE_DETACHED: |
| eventExecutor.execute(() -> processRouterGatewayNodeDetached(event.subject(), event.gateway())); |
| break; |
| default: |
| //do nothing |
| break; |
| } |
| } |
| |
| private void processRouterExternalNetAttachedOrGwAttached(KubevirtRouter router) { |
| if (!isRelevantHelper()) { |
| return; |
| } |
| KubevirtNode gatewayNode = kubevirtNodeService.node(router.electedGateway()); |
| |
| if (gatewayNode == null) { |
| return; |
| } |
| |
| String routerSnatIp = router.external().keySet().stream().findAny().orElse(null); |
| if (routerSnatIp == null) { |
| return; |
| } |
| |
| if (router.peerRouter() != null && |
| router.peerRouter().macAddress() == null && |
| router.peerRouter().ipAddress() != null) { |
| setRuleArpRequestToController(IpAddress.valueOf(routerSnatIp), |
| router.peerRouter().ipAddress(), gatewayNode.hostname(), true); |
| |
| retrievePeerRouterMac(router, router.peerRouter().ipAddress()); |
| } |
| } |
| |
| private void processRouterExternalNetDetached(KubevirtRouter router, String routerSnatIp, |
| String peerRouterIp) { |
| if (!isRelevantHelper()) { |
| return; |
| } |
| if (router.electedGateway() == null) { |
| return; |
| } |
| KubevirtNode gatewayNode = kubevirtNodeService.node(router.electedGateway()); |
| |
| if (gatewayNode == null) { |
| return; |
| } |
| |
| if (routerSnatIp == null || peerRouterIp == null) { |
| return; |
| } |
| setRuleArpRequestToController(IpAddress.valueOf(routerSnatIp), |
| IpAddress.valueOf(peerRouterIp), gatewayNode.hostname(), false); |
| } |
| |
| private void processRouterGatewayNodeDetached(KubevirtRouter router, String detachedGatewayNode) { |
| if (!isRelevantHelper()) { |
| return; |
| } |
| if (detachedGatewayNode == null) { |
| return; |
| } |
| String routerSnatIp = router.external().keySet().stream().findAny().orElse(null); |
| if (routerSnatIp == null) { |
| return; |
| } |
| |
| if (router.peerRouter() != null && router.peerRouter().ipAddress() != null) { |
| setRuleArpRequestToController(IpAddress.valueOf(routerSnatIp), |
| router.peerRouter().ipAddress(), detachedGatewayNode, false); |
| } |
| } |
| } |
| |
| private class InternalPacketProcessor implements PacketProcessor { |
| @Override |
| public void process(PacketContext context) { |
| if (context.isHandled()) { |
| return; |
| } |
| |
| InboundPacket pkt = context.inPacket(); |
| Ethernet ethernet = pkt.parsed(); |
| |
| if (ethernet != null && ethernet.getEtherType() == Ethernet.TYPE_ARP) { |
| processArpPacket(ethernet); |
| } |
| } |
| |
| private void processArpPacket(Ethernet ethernet) { |
| ARP arp = (ARP) ethernet.getPayload(); |
| |
| if (arp.getOpCode() == ARP.OP_REQUEST) { |
| return; |
| } |
| |
| IpAddress spa = Ip4Address.valueOf(arp.getSenderProtocolAddress()); |
| MacAddress sha = MacAddress.valueOf(arp.getSenderHardwareAddress()); |
| |
| IpAddress tpa = Ip4Address.valueOf(arp.getTargetProtocolAddress()); |
| |
| KubevirtRouter router = kubevirtRouterService.routers().stream() |
| .filter(r -> r.peerRouter() != null && r.peerRouter().ipAddress().equals(spa)) |
| .filter(r -> { |
| String routerSnatIp = r.external().keySet().stream().findAny().orElse(null); |
| if (routerSnatIp == null) { |
| return false; |
| } |
| return IpAddress.valueOf(routerSnatIp).equals(tpa); |
| }) |
| .findAny().orElse(null); |
| |
| if (router == null) { |
| return; |
| } |
| |
| KubevirtPeerRouter peerRouter = new KubevirtPeerRouter(spa, sha); |
| log.info("Update peer router mac adress {} to router {}", peerRouter.macAddress(), router.name()); |
| |
| kubevirtRouterService.updatePeerRouterMac(router.name(), sha); |
| } |
| } |
| } |