| /* |
| * Copyright 2018-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.openstacktroubleshoot.impl; |
| |
| import com.google.common.collect.Sets; |
| import org.onlab.packet.DeserializationException; |
| import org.onlab.packet.Ethernet; |
| import org.onlab.packet.ICMP; |
| import org.onlab.packet.ICMPEcho; |
| import org.onlab.packet.IPv4; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.IpPrefix; |
| import org.onlab.packet.MacAddress; |
| import org.onlab.util.KryoNamespace; |
| 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.mastership.MastershipService; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.net.flow.DefaultTrafficSelector; |
| import org.onosproject.net.flow.DefaultTrafficTreatment; |
| import org.onosproject.net.flow.FlowEntry; |
| import org.onosproject.net.flow.FlowRuleService; |
| import org.onosproject.net.flow.TrafficSelector; |
| import org.onosproject.net.flow.TrafficTreatment; |
| import org.onosproject.net.flow.criteria.Criterion; |
| import org.onosproject.net.flow.criteria.IPCriterion; |
| import org.onosproject.net.packet.DefaultOutboundPacket; |
| import org.onosproject.net.packet.InboundPacket; |
| import org.onosproject.net.packet.OutboundPacket; |
| import org.onosproject.net.packet.PacketContext; |
| import org.onosproject.net.packet.PacketProcessor; |
| import org.onosproject.net.packet.PacketService; |
| import org.onosproject.openstacknetworking.api.InstancePort; |
| import org.onosproject.openstacknetworking.api.InstancePortService; |
| import org.onosproject.openstacknetworking.api.OpenstackFlowRuleService; |
| import org.onosproject.openstacknetworking.api.OpenstackNetworkService; |
| import org.onosproject.openstacknode.api.OpenstackNode; |
| import org.onosproject.openstacknode.api.OpenstackNodeService; |
| import org.onosproject.openstacktroubleshoot.api.OpenstackTroubleshootService; |
| import org.onosproject.openstacktroubleshoot.api.Reachability; |
| import org.onosproject.store.serializers.KryoNamespaces; |
| import org.onosproject.store.service.AtomicCounter; |
| import org.onosproject.store.service.ConsistentMap; |
| import org.onosproject.store.service.Serializer; |
| import org.onosproject.store.service.StorageService; |
| 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 org.slf4j.LoggerFactory; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Optional; |
| import java.util.Set; |
| import java.util.concurrent.ExecutorService; |
| import java.util.function.BooleanSupplier; |
| import java.util.function.Predicate; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static java.util.concurrent.Executors.newSingleThreadScheduledExecutor; |
| import static org.onlab.packet.Ethernet.TYPE_IPV4; |
| import static org.onlab.packet.ICMP.TYPE_ECHO_REPLY; |
| import static org.onlab.packet.ICMP.TYPE_ECHO_REQUEST; |
| import static org.onlab.util.Tools.groupedThreads; |
| import static org.onosproject.net.PortNumber.TABLE; |
| import static org.onosproject.net.flow.FlowEntry.FlowEntryState.ADDED; |
| import static org.onosproject.net.flow.criteria.Criterion.Type.IPV4_DST; |
| import static org.onosproject.net.flow.criteria.Criterion.Type.IPV4_SRC; |
| import static org.onosproject.openstacknetworking.api.Constants.ACL_TABLE; |
| import static org.onosproject.openstacknetworking.api.Constants.DEFAULT_EXTERNAL_ROUTER_MAC; |
| import static org.onosproject.openstacknetworking.api.Constants.DEFAULT_GATEWAY_MAC; |
| import static org.onosproject.openstacknetworking.api.Constants.FORWARDING_TABLE; |
| import static org.onosproject.openstacknetworking.api.Constants.GW_COMMON_TABLE; |
| import static org.onosproject.openstacknetworking.api.Constants.OPENSTACK_NETWORKING_APP_ID; |
| import static org.onosproject.openstacknetworking.api.Constants.PRIORITY_ICMP_PROBE_RULE; |
| import static org.onosproject.openstacknetworking.api.Constants.VTAG_TABLE; |
| import static org.onosproject.openstacknetworking.api.InstancePort.State.ACTIVE; |
| import static org.onosproject.openstacknode.api.OpenstackNode.NodeType.GATEWAY; |
| import static org.onosproject.openstacktroubleshoot.util.OpenstackTroubleshootUtil.getSegId; |
| |
| /** |
| * Implementation of openstack troubleshoot app. |
| */ |
| @Component(immediate = true, service = OpenstackTroubleshootService.class) |
| public class OpenstackTroubleshootManager implements OpenstackTroubleshootService { |
| |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| private static final int VID_TAG_RULE_INSTALL_TIMEOUT_MS = 1000; |
| private static final int ICMP_RULE_INSTALL_TIMEOUT_MS = 1000; |
| private static final int ICMP_REPLY_TIMEOUT_MS = 3000; |
| private static final String SERIALIZER_NAME = "openstack-troubleshoot"; |
| private static final byte TTL = 64; |
| private static final short INITIAL_SEQ = 1; |
| private static final short MAX_ICMP_GEN = 3; |
| private static final int PREFIX_LENGTH = 32; |
| private static final int ICMP_PROCESSOR_PRIORITY = 99; |
| |
| private static final MacAddress LOCAL_MAC = MacAddress.valueOf("11:22:33:44:55:66"); |
| |
| private static final String ICMP_COUNTER_NAME = "icmp-id-counter"; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected PacketService packetService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected FlowRuleService flowRuleService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected StorageService storageService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected LeadershipService leadershipService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected MastershipService mastershipService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected ClusterService clusterService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected OpenstackNodeService osNodeService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected OpenstackNetworkService osNetworkService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected OpenstackFlowRuleService osFlowRuleService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected InstancePortService instancePortService; |
| |
| private final ExecutorService eventExecutor = newSingleThreadScheduledExecutor( |
| groupedThreads(this.getClass().getSimpleName(), "event-handler", log)); |
| private final InternalPacketProcessor packetProcessor = new InternalPacketProcessor(); |
| private ConsistentMap<String, Reachability> icmpReachabilityMap; |
| private AtomicCounter icmpIdCounter; |
| |
| private static final KryoNamespace SERIALIZER_DEFAULT_MAP = KryoNamespace.newBuilder() |
| .register(KryoNamespaces.API) |
| .register(Reachability.class) |
| .register(DefaultReachability.class) |
| .build(); |
| |
| private Set<String> icmpIds = Sets.newConcurrentHashSet(); |
| |
| private ApplicationId appId; |
| private NodeId localNodeId; |
| |
| @Activate |
| protected void activate() { |
| |
| appId = coreService.registerApplication(OPENSTACK_NETWORKING_APP_ID); |
| packetService.addProcessor(packetProcessor, |
| PacketProcessor.director(ICMP_PROCESSOR_PRIORITY)); |
| |
| localNodeId = clusterService.getLocalNode().id(); |
| leadershipService.runForLeadership(appId.name()); |
| |
| icmpReachabilityMap = storageService.<String, Reachability>consistentMapBuilder() |
| .withSerializer(Serializer.using(SERIALIZER_DEFAULT_MAP)) |
| .withName(SERIALIZER_NAME) |
| .withApplicationId(appId) |
| .build(); |
| |
| icmpIdCounter = storageService.getAtomicCounter(ICMP_COUNTER_NAME); |
| |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| |
| packetService.removeProcessor(packetProcessor); |
| leadershipService.withdraw(appId.name()); |
| eventExecutor.shutdown(); |
| |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public Reachability probeEastWest(InstancePort srcPort, InstancePort dstPort) { |
| |
| Reachability.Builder rBuilder = DefaultReachability.builder() |
| .srcIp(srcPort.ipAddress()) |
| .dstIp(dstPort.ipAddress()); |
| |
| if (srcPort.equals(dstPort)) { |
| // self probing should always return true |
| rBuilder.isReachable(true); |
| return rBuilder.build(); |
| } else { |
| if (srcPort.state() == ACTIVE && dstPort.state() == ACTIVE) { |
| |
| // if the two ports are located in different types of networks, |
| // we immediately return unreachable state |
| if (!osNetworkService.networkType(srcPort.networkId()) |
| .equals(osNetworkService.networkType(dstPort.networkId()))) { |
| rBuilder.isReachable(false); |
| return rBuilder.build(); |
| } |
| |
| // install flow rules to enforce ICMP_REQUEST to be tagged and direct to ACL table |
| eventExecutor.execute(() -> setVidTagRule(srcPort, true)); |
| |
| // install flow rules to enforce forwarding ICMP_REPLY to controller |
| eventExecutor.execute(() -> setEastWestIcmpReplyRule(srcPort, true)); |
| |
| timeoutPredicate(1, VID_TAG_RULE_INSTALL_TIMEOUT_MS, |
| this::checkVidTagRule, srcPort.ipAddress().toString()); |
| |
| timeoutPredicate(1, ICMP_RULE_INSTALL_TIMEOUT_MS, |
| this::checkEastWestIcmpReplyRule, srcPort.ipAddress().toString()); |
| |
| // send out ICMP ECHO request |
| sendIcmpEchoRequest(srcPort, dstPort, null, Direction.EAST_WEST); |
| |
| BooleanSupplier checkReachability = () -> icmpReachabilityMap.asJavaMap() |
| .values().stream().allMatch(Reachability::isReachable); |
| |
| timeoutSupplier(1, ICMP_REPLY_TIMEOUT_MS, checkReachability); |
| |
| // uninstall ICMP_REQUEST VID tagging rules |
| eventExecutor.execute(() -> setVidTagRule(srcPort, false)); |
| |
| // uninstall ICMP_REPLY enforcing rules |
| eventExecutor.execute(() -> setEastWestIcmpReplyRule(srcPort, false)); |
| |
| return icmpReachabilityMap.asJavaMap() |
| .get(String.valueOf(icmpIdCounter.get())); |
| |
| } else { |
| rBuilder.isReachable(false); |
| return rBuilder.build(); |
| } |
| } |
| } |
| |
| @Override |
| public Reachability probeNorthSouth(InstancePort port) { |
| Optional<OpenstackNode> gw = osNodeService.completeNodes(GATEWAY).stream().findFirst(); |
| |
| if (!gw.isPresent()) { |
| log.warn("Gateway is not available to troubleshoot north-south traffic."); |
| return null; |
| } |
| |
| // install flow rules to enforce forwarding ICMP_REPLY to controller |
| eventExecutor.execute(() -> setNorthSouthIcmpReplyRule(port, gw.get(), true)); |
| |
| timeoutPredicate(1, ICMP_RULE_INSTALL_TIMEOUT_MS, |
| this::checkNorthSouthIcmpReplyRule, port.ipAddress().toString()); |
| |
| // send out ICMP ECHO request |
| sendIcmpEchoRequest(null, port, gw.get(), Direction.NORTH_SOUTH); |
| |
| BooleanSupplier checkReachability = () -> icmpReachabilityMap.asJavaMap() |
| .values().stream().allMatch(Reachability::isReachable); |
| |
| timeoutSupplier(1, ICMP_REPLY_TIMEOUT_MS, checkReachability); |
| |
| // uninstall ICMP_REPLY enforcing rules |
| eventExecutor.execute(() -> setNorthSouthIcmpReplyRule(port, gw.get(), false)); |
| |
| return icmpReachabilityMap.asJavaMap().get(String.valueOf(icmpIdCounter.get())); |
| } |
| |
| /** |
| * Checks whether east-west ICMP reply rule is added or not. |
| * |
| * @param dstIp IP address |
| * @return true if ICMP reply rule is added, false otherwise |
| */ |
| private boolean checkEastWestIcmpReplyRule(String dstIp) { |
| return checkFlowRule(dstIp, IPV4_DST); |
| } |
| |
| /** |
| * Checks whether north-south ICMP reply rule is added or not. |
| * |
| * @param srcIp IP address |
| * @return true if ICMP reply rule is added, false otherwise |
| */ |
| private boolean checkNorthSouthIcmpReplyRule(String srcIp) { |
| return checkFlowRule(srcIp, IPV4_SRC); |
| } |
| |
| /** |
| * Checks whether ICMP request VID tagging rule is added or not. |
| * |
| * @param srcIp source IP address |
| * @return true if the rule is added, false otherwise |
| */ |
| private boolean checkVidTagRule(String srcIp) { |
| return checkFlowRule(srcIp, IPV4_SRC); |
| } |
| |
| /** |
| * Checks whether flow rules with the given IP and criterion are added or not. |
| * |
| * @param ip IP address |
| * @param ipType IP criterion type (IPV4_DST or IPV4_SRC) |
| * @return true if the flow rule is added, false otherwise |
| */ |
| private boolean checkFlowRule(String ip, Criterion.Type ipType) { |
| for (FlowEntry entry : flowRuleService.getFlowEntriesById(appId)) { |
| TrafficSelector selector = entry.selector(); |
| |
| IPCriterion ipCriterion = (IPCriterion) selector.getCriterion(ipType); |
| |
| if (ipCriterion != null && |
| ip.equals(ipCriterion.ip().address().toString()) && |
| entry.state() == ADDED) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Installs/uninstalls a flow rule to match ingress fake ICMP request packets, |
| * and tags VNI/VID, direct the tagged packet to ACL table. |
| * |
| * @param port instance port |
| * @param install installation flag |
| */ |
| private void setVidTagRule(InstancePort port, boolean install) { |
| TrafficSelector selector = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_IPV4) |
| .matchIPSrc(IpPrefix.valueOf(port.ipAddress(), PREFIX_LENGTH)) |
| .build(); |
| |
| TrafficTreatment.Builder tb = DefaultTrafficTreatment.builder() |
| .setTunnelId(getSegId(osNetworkService, port)) |
| .transition(ACL_TABLE); |
| |
| osFlowRuleService.setRule( |
| appId, |
| port.deviceId(), |
| selector, |
| tb.build(), |
| PRIORITY_ICMP_PROBE_RULE, |
| VTAG_TABLE, |
| install); |
| } |
| |
| /** |
| * Installs/uninstalls a flow rule to match north-south ICMP reply packets, |
| * direct all ICMP reply packets to the controller. |
| * |
| * @param port instance port |
| * @param gw gateway node |
| * @param install installation flag |
| */ |
| private void setNorthSouthIcmpReplyRule(InstancePort port, OpenstackNode gw, |
| boolean install) { |
| TrafficSelector selector = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_IPV4) |
| .matchIPSrc(IpPrefix.valueOf(port.ipAddress(), PREFIX_LENGTH)) |
| .matchIPProtocol(IPv4.PROTOCOL_ICMP) |
| .matchIcmpType(ICMP.TYPE_ECHO_REPLY) |
| .matchTunnelId(getSegId(osNetworkService, port)) |
| .build(); |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .setIpSrc(instancePortService.floatingIp(port.portId())) |
| .setEthSrc(port.macAddress()) |
| .setEthDst(DEFAULT_EXTERNAL_ROUTER_MAC) |
| .punt() |
| .build(); |
| |
| osFlowRuleService.setRule( |
| appId, |
| gw.intgBridge(), |
| selector, |
| treatment, |
| PRIORITY_ICMP_PROBE_RULE, |
| GW_COMMON_TABLE, |
| install); |
| } |
| |
| /** |
| * Installs/uninstalls a flow rule to match east-west ICMP reply packets, |
| * direct all ICMP reply packets to the controller. |
| * |
| * @param port instance port |
| * @param install installation flag |
| */ |
| private void setEastWestIcmpReplyRule(InstancePort port, boolean install) { |
| TrafficSelector selector = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_IPV4) |
| .matchIPDst(IpPrefix.valueOf(port.ipAddress(), PREFIX_LENGTH)) |
| .matchIPProtocol(IPv4.PROTOCOL_ICMP) |
| .matchIcmpType(ICMP.TYPE_ECHO_REPLY) |
| .build(); |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .punt() |
| .build(); |
| |
| osFlowRuleService.setRule( |
| appId, |
| port.deviceId(), |
| selector, |
| treatment, |
| PRIORITY_ICMP_PROBE_RULE, |
| FORWARDING_TABLE, |
| install); |
| } |
| |
| /** |
| * Sends out ICMP ECHO REQUEST to destined VM. |
| * |
| * @param srcPort source instance port |
| * @param dstPort destination instance port |
| */ |
| private void sendIcmpEchoRequest(InstancePort srcPort, InstancePort dstPort, |
| OpenstackNode gateway, Direction direction) { |
| |
| short icmpSeq = INITIAL_SEQ; |
| |
| short icmpId = (short) icmpIdCounter.incrementAndGet(); |
| |
| for (int i = 0; i < MAX_ICMP_GEN; i++) { |
| packetService.emit(buildIcmpOutputPacket(srcPort, dstPort, gateway, |
| icmpId, icmpSeq, direction)); |
| icmpSeq++; |
| } |
| } |
| |
| /** |
| * Builds ICMP Outbound packet. |
| * |
| * @param srcPort source instance port |
| * @param dstPort destination instance port |
| * @param icmpId ICMP identifier |
| * @param icmpSeq ICMP sequence number |
| */ |
| private OutboundPacket buildIcmpOutputPacket(InstancePort srcPort, |
| InstancePort dstPort, |
| OpenstackNode gateway, |
| short icmpId, |
| short icmpSeq, |
| Direction direction) { |
| |
| Ethernet ethFrame; |
| IpAddress srcIp; |
| IpAddress dstIp; |
| DeviceId deviceId; |
| |
| if (direction == Direction.EAST_WEST) { |
| ethFrame = constructEastWestIcmpPacket(srcPort, dstPort, icmpId, icmpSeq); |
| srcIp = srcPort.ipAddress(); |
| dstIp = dstPort.ipAddress(); |
| deviceId = srcPort.deviceId(); |
| } else if (direction == Direction.NORTH_SOUTH) { |
| ethFrame = constructNorthSouthIcmpPacket(dstPort, icmpId, icmpSeq); |
| srcIp = clusterService.getLocalNode().ip(); |
| dstIp = instancePortService.floatingIp(dstPort.portId()); |
| deviceId = gateway.intgBridge(); |
| } else { |
| log.warn("Invalid traffic direction {}", direction); |
| return null; |
| } |
| |
| TrafficTreatment.Builder tBuilder = DefaultTrafficTreatment.builder(); |
| |
| // we send out the packet to ingress table (index is 0) of source OVS |
| // to enforce the Outbound packet to go through the ingress and egress |
| // pipeline |
| tBuilder.setOutput(TABLE); |
| |
| Reachability reachability = DefaultReachability.builder() |
| .srcIp(srcIp) |
| .dstIp(dstIp) |
| .isReachable(false) |
| .build(); |
| |
| icmpReachabilityMap.put(String.valueOf(icmpId), reachability); |
| icmpIds.add(String.valueOf(icmpId)); |
| |
| return new DefaultOutboundPacket( |
| deviceId, |
| tBuilder.build(), |
| ByteBuffer.wrap(ethFrame.serialize())); |
| } |
| |
| /** |
| * Constructs an ICMP packet with given source and destination IP/MAC. |
| * |
| * @param srcIp source IP address |
| * @param dstIp destination IP address |
| * @param srcMac source MAC address |
| * @param dstMac destination MAC address |
| * @param icmpId ICMP identifier |
| * @param icmpSeq ICMP sequence number |
| * @return an ethernet frame which contains ICMP payload |
| */ |
| private Ethernet constructIcmpPacket(IpAddress srcIp, IpAddress dstIp, |
| MacAddress srcMac, MacAddress dstMac, |
| short icmpId, short icmpSeq) { |
| |
| // Ethernet frame |
| Ethernet ethFrame = new Ethernet(); |
| |
| ethFrame.setEtherType(TYPE_IPV4); |
| ethFrame.setSourceMACAddress(srcMac); |
| ethFrame.setDestinationMACAddress(dstMac); |
| |
| // IP packet |
| IPv4 iPacket = new IPv4(); |
| iPacket.setDestinationAddress(dstIp.toString()); |
| iPacket.setSourceAddress(srcIp.toString()); |
| iPacket.setTtl(TTL); |
| iPacket.setProtocol(IPv4.PROTOCOL_ICMP); |
| |
| // ICMP packet |
| ICMP icmp = new ICMP(); |
| icmp.setIcmpType(TYPE_ECHO_REQUEST) |
| .setIcmpCode(TYPE_ECHO_REQUEST) |
| .resetChecksum(); |
| |
| // ICMP ECHO packet |
| ICMPEcho icmpEcho = new ICMPEcho(); |
| icmpEcho.setIdentifier(icmpId) |
| .setSequenceNum(icmpSeq); |
| |
| ByteBuffer byteBufferIcmpEcho = ByteBuffer.wrap(icmpEcho.serialize()); |
| |
| try { |
| icmp.setPayload(ICMPEcho.deserializer().deserialize(byteBufferIcmpEcho.array(), |
| 0, ICMPEcho.ICMP_ECHO_HEADER_LENGTH)); |
| } catch (DeserializationException e) { |
| log.warn("Failed to deserialize ICMP ECHO REQUEST packet"); |
| } |
| |
| ByteBuffer byteBufferIcmp = ByteBuffer.wrap(icmp.serialize()); |
| |
| try { |
| iPacket.setPayload(ICMP.deserializer().deserialize(byteBufferIcmp.array(), |
| 0, |
| byteBufferIcmp.array().length)); |
| } catch (DeserializationException e) { |
| log.warn("Failed to deserialize ICMP packet"); |
| } |
| |
| ethFrame.setPayload(iPacket); |
| |
| return ethFrame; |
| } |
| |
| /** |
| * Constructs an east-west ICMP packet with given source and destination IP/MAC. |
| * |
| * @param srcPort source instance port |
| * @param dstPort destination instance port |
| * @param icmpId ICMP identifier |
| * @param icmpSeq ICMP sequence number |
| * @return an ethernet frame which contains ICMP payload |
| */ |
| private Ethernet constructEastWestIcmpPacket(InstancePort srcPort, |
| InstancePort dstPort, |
| short icmpId, short icmpSeq) { |
| boolean isRemote = true; |
| |
| if (srcPort.deviceId().equals(dstPort.deviceId()) && |
| osNetworkService.gatewayIp(srcPort.portId()) |
| .equals(osNetworkService.gatewayIp(dstPort.portId()))) { |
| isRemote = false; |
| } |
| |
| // if the source and destination VMs are located in different OVS, |
| // we will assign fake gateway MAC as the destination MAC |
| MacAddress dstMac = isRemote ? DEFAULT_GATEWAY_MAC : dstPort.macAddress(); |
| |
| return constructIcmpPacket(srcPort.ipAddress(), dstPort.ipAddress(), |
| srcPort.macAddress(), dstMac, icmpId, icmpSeq); |
| } |
| |
| /** |
| * Constructs a north-south ICMP packet with the given destination IP/MAC. |
| * |
| * @param dstPort destination instance port |
| * @param icmpId ICMP identifier |
| * @param icmpSeq ICMP sequence number |
| * @return an ethernet frame which contains ICMP payload |
| */ |
| private Ethernet constructNorthSouthIcmpPacket(InstancePort dstPort, |
| short icmpId, short icmpSeq) { |
| |
| IpAddress localIp = clusterService.getLocalNode().ip(); |
| IpAddress fip = instancePortService.floatingIp(dstPort.portId()); |
| |
| if (fip != null) { |
| return constructIcmpPacket(localIp, fip, LOCAL_MAC, dstPort.macAddress(), |
| icmpId, icmpSeq); |
| } else { |
| return null; |
| } |
| } |
| |
| /** |
| * Handles ICMP ECHO REPLY packets. |
| * |
| * @param ipPacket IP packet |
| * @param icmp ICMP packet |
| */ |
| private void handleIcmpEchoReply(IPv4 ipPacket, ICMP icmp) { |
| |
| String icmpKey = icmpId(icmp); |
| |
| String srcIp = IPv4.fromIPv4Address(ipPacket.getDestinationAddress()); |
| String dstIp = IPv4.fromIPv4Address(ipPacket.getSourceAddress()); |
| |
| Reachability reachability = DefaultReachability.builder() |
| .srcIp(IpAddress.valueOf(srcIp)) |
| .dstIp(IpAddress.valueOf(dstIp)) |
| .isReachable(false) |
| .build(); |
| |
| icmpReachabilityMap.computeIfPresent(icmpKey, (key, value) -> { |
| if (value.equals(reachability)) { |
| |
| log.debug("src: {}, dst: {} is reachable!", value.dstIp(), value.srcIp()); |
| |
| return DefaultReachability.builder() |
| .srcIp(IpAddress.valueOf(srcIp)) |
| .dstIp(IpAddress.valueOf(dstIp)) |
| .isReachable(true) |
| .build(); |
| } |
| return reachability; |
| }); |
| } |
| |
| /** |
| * Obtains an unique ICMP key. |
| * |
| * @param icmp ICMP packet |
| * @return ICMP key |
| */ |
| private String icmpId(ICMP icmp) { |
| ICMPEcho echo = (ICMPEcho) icmp.getPayload(); |
| checkNotNull(echo); |
| |
| short icmpId = echo.getIdentifier(); |
| |
| return String.valueOf(icmpId); |
| } |
| |
| /** |
| * Holds the current thread unit the timeout expires, during the hold the |
| * thread periodically execute the given method. |
| * |
| * @param count count of unit |
| * @param unit unit |
| * @param predicate predicate |
| * @param predicateArg predicate argument |
| */ |
| private void timeoutPredicate(long count, int unit, |
| Predicate<String> predicate, String predicateArg) { |
| long timeoutExpiredMs = System.currentTimeMillis() + unit * count; |
| |
| while (true) { |
| |
| long waitMs = timeoutExpiredMs - System.currentTimeMillis(); |
| |
| if (predicate.test(predicateArg)) { |
| break; |
| } |
| |
| if (waitMs <= 0) { |
| break; |
| } |
| } |
| } |
| |
| /** |
| * Holds the current thread unit the timeout expires, during the hold the |
| * thread periodically execute the given method. |
| * |
| * @param count count of unit |
| * @param unit unit |
| * @param supplier boolean supplier |
| */ |
| private void timeoutSupplier(long count, int unit, BooleanSupplier supplier) { |
| long timeoutExpiredMs = System.currentTimeMillis() + unit * count; |
| |
| while (true) { |
| |
| long waitMs = timeoutExpiredMs - System.currentTimeMillis(); |
| |
| if (supplier.getAsBoolean()) { |
| break; |
| } |
| |
| if (waitMs <= 0) { |
| break; |
| } |
| } |
| } |
| |
| 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) { |
| return; |
| } |
| |
| IPv4 iPacket = (IPv4) ethernet.getPayload(); |
| if (iPacket.getProtocol() == IPv4.PROTOCOL_ICMP) { |
| eventExecutor.execute(() -> processIcmpPacket(context, ethernet)); |
| } |
| } |
| |
| /** |
| * Processes the received ICMP packet. |
| * |
| * @param context packet context |
| * @param ethernet ethernet |
| */ |
| private void processIcmpPacket(PacketContext context, Ethernet ethernet) { |
| IPv4 ipPacket = (IPv4) ethernet.getPayload(); |
| ICMP icmp = (ICMP) ipPacket.getPayload(); |
| log.trace("Processing ICMP packet source MAC:{}, source IP:{}," + |
| "dest MAC:{}, dest IP:{}", |
| ethernet.getSourceMAC(), |
| IpAddress.valueOf(ipPacket.getSourceAddress()), |
| ethernet.getDestinationMAC(), |
| IpAddress.valueOf(ipPacket.getDestinationAddress())); |
| |
| String icmpId = icmpId(icmp); |
| |
| // if the ICMP ID is not contained in ICMP ID set, we do not handle it |
| if (!icmpIds.contains(icmpId)) { |
| return; |
| } |
| |
| switch (icmp.getIcmpType()) { |
| case TYPE_ECHO_REPLY: |
| handleIcmpEchoReply(ipPacket, icmp); |
| context.block(); |
| icmpIds.remove(icmpId); |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| } |