| /* |
| * Copyright 2016-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.openstacknetworking.impl; |
| |
| import com.google.common.base.Strings; |
| 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.onlab.packet.ICMP; |
| import org.onlab.packet.ICMPEcho; |
| import org.onlab.packet.IPv4; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.MacAddress; |
| import org.onlab.packet.VlanId; |
| import org.onlab.util.KryoNamespace; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.core.CoreService; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.net.flow.DefaultTrafficTreatment; |
| import org.onosproject.net.flow.TrafficTreatment; |
| 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.Constants; |
| import org.onosproject.openstacknetworking.api.ExternalPeerRouter; |
| import org.onosproject.openstacknetworking.api.InstancePort; |
| import org.onosproject.openstacknetworking.api.InstancePortService; |
| import org.onosproject.openstacknetworking.api.OpenstackNetworkService; |
| import org.onosproject.openstacknetworking.api.OpenstackRouterService; |
| import org.onosproject.openstacknode.api.OpenstackNode; |
| import org.onosproject.openstacknode.api.OpenstackNodeService; |
| import org.onosproject.store.serializers.KryoNamespaces; |
| import org.onosproject.store.service.ConsistentMap; |
| import org.onosproject.store.service.Serializer; |
| import org.onosproject.store.service.StorageService; |
| import org.openstack4j.model.network.ExternalGateway; |
| import org.openstack4j.model.network.Port; |
| import org.openstack4j.model.network.Router; |
| import org.openstack4j.model.network.RouterInterface; |
| import org.openstack4j.model.network.Subnet; |
| import org.openstack4j.openstack.networking.domain.NeutronIP; |
| import org.slf4j.Logger; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Objects; |
| import java.util.Optional; |
| import java.util.Set; |
| import java.util.concurrent.ExecutorService; |
| import java.util.stream.Collectors; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static java.util.concurrent.Executors.newSingleThreadExecutor; |
| 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.openstacknetworking.api.Constants.DEFAULT_GATEWAY_MAC; |
| import static org.onosproject.openstacknetworking.api.Constants.OPENSTACK_NETWORKING_APP_ID; |
| import static org.onosproject.openstacknode.api.OpenstackNode.NodeType.GATEWAY; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Handles ICMP packet received from a gateway node. |
| * For a request for virtual network subnet gateway, it generates fake ICMP reply. |
| * For a request for the external network, it does source NAT with the public IP and |
| * forward the request to the external only if the requested virtual subnet has |
| * external connectivity. |
| */ |
| @Component(immediate = true) |
| public class OpenstackRoutingIcmpHandler { |
| |
| protected final Logger log = getLogger(getClass()); |
| |
| private static final String ERR_REQ = "Failed to handle ICMP request: "; |
| private static final String ERR_DUPLICATE = " already exists"; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected PacketService packetService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected StorageService storageService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected OpenstackNodeService osNodeService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected InstancePortService instancePortService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected OpenstackNetworkService osNetworkService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected OpenstackRouterService osRouterService; |
| |
| private final ExecutorService eventExecutor = newSingleThreadExecutor( |
| groupedThreads(this.getClass().getSimpleName(), "event-handler", log)); |
| private final InternalPacketProcessor packetProcessor = new InternalPacketProcessor(); |
| private ConsistentMap<String, InstancePort> icmpInfoMap; |
| |
| private static final KryoNamespace SERIALIZER_ICMP_MAP = KryoNamespace.newBuilder() |
| .register(KryoNamespaces.API) |
| .register(InstancePort.class) |
| .register(DefaultInstancePort.class) |
| .register(InstancePort.State.class) |
| .build(); |
| |
| private ApplicationId appId; |
| |
| @Activate |
| protected void activate() { |
| appId = coreService.registerApplication(OPENSTACK_NETWORKING_APP_ID); |
| packetService.addProcessor(packetProcessor, PacketProcessor.director(1)); |
| |
| icmpInfoMap = storageService.<String, InstancePort>consistentMapBuilder() |
| .withSerializer(Serializer.using(SERIALIZER_ICMP_MAP)) |
| .withName("openstack-icmpmap") |
| .withApplicationId(appId) |
| .build(); |
| |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| packetService.removeProcessor(packetProcessor); |
| eventExecutor.shutdown(); |
| |
| log.info("Stopped"); |
| } |
| |
| private boolean handleEchoRequest(DeviceId srcDevice, MacAddress srcMac, IPv4 ipPacket, |
| ICMP icmp) { |
| InstancePort instPort = instancePortService.instancePort(srcMac); |
| if (instPort == null) { |
| log.warn(ERR_REQ + "unknown source host(MAC:{})", srcMac); |
| return false; |
| } |
| |
| IpAddress srcIp = IpAddress.valueOf(ipPacket.getSourceAddress()); |
| IpAddress dstIp = IpAddress.valueOf(ipPacket.getDestinationAddress()); |
| |
| Subnet srcSubnet = getSourceSubnet(instPort, srcIp); |
| if (srcSubnet == null) { |
| log.warn(ERR_REQ + "unknown source subnet(IP:{})", srcIp); |
| return false; |
| } |
| |
| if (Strings.isNullOrEmpty(srcSubnet.getGateway())) { |
| log.warn(ERR_REQ + "source subnet(ID:{}, CIDR:{}) has no gateway", |
| srcSubnet.getId(), srcSubnet.getCidr()); |
| return false; |
| } |
| |
| if (isForSubnetGateway(IpAddress.valueOf(ipPacket.getDestinationAddress()), |
| srcSubnet)) { |
| // this is a request for the subnet gateway |
| log.trace("Icmp request to gateway {} from {}", dstIp, srcIp); |
| processRequestForGateway(ipPacket, instPort); |
| } else { |
| // this is a request for the external network |
| log.trace("Icmp request to external {} from {}", dstIp, srcIp); |
| |
| RouterInterface routerInterface = routerInterface(srcSubnet); |
| if (routerInterface == null) { |
| log.warn(ERR_REQ + "failed to get router interface"); |
| return false; |
| } |
| |
| ExternalGateway externalGateway = externalGateway(routerInterface); |
| if (externalGateway == null) { |
| log.warn(ERR_REQ + "failed to get external gateway"); |
| return false; |
| } |
| |
| ExternalPeerRouter externalPeerRouter = osNetworkService.externalPeerRouter(externalGateway); |
| if (externalPeerRouter == null) { |
| log.warn(ERR_REQ + "failed to get external peer router"); |
| return false; |
| } |
| |
| IpAddress externalIp = getExternalIp(externalGateway, routerInterface); |
| if (externalIp == null) { |
| log.warn(ERR_REQ + "failed to get external ip"); |
| return false; |
| } |
| |
| sendRequestForExternal(ipPacket, srcDevice, externalIp, externalPeerRouter); |
| |
| String icmpInfoKey = icmpInfoKey(icmp, |
| externalIp.toString(), |
| IPv4.fromIPv4Address(ipPacket.getDestinationAddress())); |
| log.trace("Created icmpInfo key is {}", icmpInfoKey); |
| |
| try { |
| icmpInfoMap.compute(icmpInfoKey, (id, existing) -> { |
| checkArgument(existing == null, ERR_DUPLICATE); |
| return instPort; |
| }); |
| } catch (IllegalArgumentException e) { |
| log.warn("IllegalArgumentException occurred because of {}", e.toString()); |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| private String icmpInfoKey(ICMP icmp, String srcIp, String dstIp) { |
| return String.valueOf(getIcmpId(icmp)) |
| .concat(srcIp) |
| .concat(dstIp); |
| } |
| private RouterInterface routerInterface(Subnet subnet) { |
| checkNotNull(subnet); |
| return osRouterService.routerInterfaces().stream() |
| .filter(i -> Objects.equals(i.getSubnetId(), subnet.getId())) |
| .findAny().orElse(null); |
| } |
| |
| private ExternalGateway externalGateway(RouterInterface osRouterIface) { |
| checkNotNull(osRouterIface); |
| Router osRouter = osRouterService.router(osRouterIface.getId()); |
| if (osRouter == null) { |
| return null; |
| } |
| if (osRouter.getExternalGatewayInfo() == null) { |
| return null; |
| } |
| return osRouter.getExternalGatewayInfo(); |
| } |
| |
| private boolean handleEchoReply(IPv4 ipPacket, ICMP icmp) { |
| String icmpInfoKey = icmpInfoKey(icmp, |
| IPv4.fromIPv4Address(ipPacket.getDestinationAddress()), |
| IPv4.fromIPv4Address(ipPacket.getSourceAddress())); |
| log.trace("Retrieved icmpInfo key is {}", icmpInfoKey); |
| |
| if (icmpInfoMap.get(icmpInfoKey) != null) { |
| processReplyFromExternal(ipPacket, icmpInfoMap.get(icmpInfoKey).value()); |
| icmpInfoMap.remove(icmpInfoKey); |
| return true; |
| } else { |
| log.debug("No ICMP Info for ICMP packet"); |
| return false; |
| } |
| } |
| |
| private Subnet getSourceSubnet(InstancePort instance, IpAddress srcIp) { |
| checkNotNull(instance); |
| checkNotNull(srcIp); |
| |
| Port osPort = osNetworkService.port(instance.portId()); |
| return osNetworkService.subnets(osPort.getNetworkId()) |
| .stream().findAny().orElse(null); |
| } |
| |
| private boolean isForSubnetGateway(IpAddress dstIp, Subnet srcSubnet) { |
| RouterInterface osRouterIface = osRouterService.routerInterfaces().stream() |
| .filter(i -> Objects.equals(i.getSubnetId(), srcSubnet.getId())) |
| .findAny().orElse(null); |
| if (osRouterIface == null) { |
| log.trace(ERR_REQ + "source subnet(ID:{}, CIDR:{}) has no router", |
| srcSubnet.getId(), srcSubnet.getCidr()); |
| return false; |
| } |
| |
| Router osRouter = osRouterService.router(osRouterIface.getId()); |
| Set<IpAddress> routableGateways = osRouterService.routerInterfaces(osRouter.getId()) |
| .stream() |
| .map(iface -> osNetworkService.subnet(iface.getSubnetId()).getGateway()) |
| .map(IpAddress::valueOf) |
| .collect(Collectors.toSet()); |
| |
| return routableGateways.contains(dstIp); |
| } |
| |
| private IpAddress getExternalIp(ExternalGateway externalGateway, RouterInterface osRouterIface) { |
| checkNotNull(externalGateway); |
| checkNotNull(osRouterIface); |
| |
| Router osRouter = osRouterService.router(osRouterIface.getId()); |
| if (osRouter == null) { |
| return null; |
| } |
| |
| Port exGatewayPort = osNetworkService.ports(externalGateway.getNetworkId()) |
| .stream() |
| .filter(port -> Objects.equals(port.getDeviceId(), osRouter.getId())) |
| .findAny().orElse(null); |
| if (exGatewayPort == null) { |
| final String error = String.format(ERR_REQ + |
| "no external gateway port for router (ID:%s, name:%s)", |
| osRouter.getId(), osRouter.getName()); |
| throw new IllegalStateException(error); |
| } |
| Optional<NeutronIP> externalIpAddress = (Optional<NeutronIP>) exGatewayPort.getFixedIps().stream().findFirst(); |
| if (!externalIpAddress.isPresent() || externalIpAddress.get().getIpAddress() == null) { |
| final String error = String.format(ERR_REQ + |
| "no external gateway IP address for router (ID:%s, name:%s)", |
| osRouter.getId(), osRouter.getName()); |
| log.warn(error); |
| return null; |
| } |
| |
| return IpAddress.valueOf(externalIpAddress.get().getIpAddress()); |
| } |
| |
| private void processRequestForGateway(IPv4 ipPacket, InstancePort instPort) { |
| ICMP icmpReq = (ICMP) ipPacket.getPayload(); |
| icmpReq.setChecksum((short) 0); |
| icmpReq.setIcmpType(TYPE_ECHO_REPLY); |
| |
| int destinationAddress = ipPacket.getSourceAddress(); |
| |
| ipPacket.setSourceAddress(ipPacket.getDestinationAddress()) |
| .setDestinationAddress(destinationAddress) |
| .resetChecksum(); |
| |
| ipPacket.setPayload(icmpReq); |
| Ethernet icmpReply = new Ethernet(); |
| icmpReply.setEtherType(Ethernet.TYPE_IPV4) |
| .setSourceMACAddress(Constants.DEFAULT_GATEWAY_MAC) |
| .setDestinationMACAddress(instPort.macAddress()) |
| .setPayload(ipPacket); |
| |
| sendReply(icmpReply, instPort); |
| } |
| |
| private void sendRequestForExternal(IPv4 ipPacket, DeviceId srcDevice, |
| IpAddress srcNatIp, ExternalPeerRouter externalPeerRouter) { |
| ICMP icmpReq = (ICMP) ipPacket.getPayload(); |
| icmpReq.resetChecksum(); |
| ipPacket.setSourceAddress(srcNatIp.getIp4Address().toInt()).resetChecksum(); |
| ipPacket.setPayload(icmpReq); |
| |
| Ethernet icmpRequestEth = new Ethernet(); |
| icmpRequestEth.setEtherType(Ethernet.TYPE_IPV4) |
| .setSourceMACAddress(DEFAULT_GATEWAY_MAC) |
| .setDestinationMACAddress(externalPeerRouter.macAddress()); |
| |
| if (!externalPeerRouter.vlanId().equals(VlanId.NONE)) { |
| icmpRequestEth.setVlanID(externalPeerRouter.vlanId().toShort()); |
| } |
| |
| icmpRequestEth.setPayload(ipPacket); |
| |
| OpenstackNode osNode = osNodeService.node(srcDevice); |
| if (osNode == null) { |
| final String error = String.format("Cannot find openstack node for %s", |
| srcDevice); |
| throw new IllegalStateException(error); |
| } |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .setOutput(osNode.uplinkPortNum()) |
| .build(); |
| |
| OutboundPacket packet = new DefaultOutboundPacket( |
| srcDevice, |
| treatment, |
| ByteBuffer.wrap(icmpRequestEth.serialize())); |
| |
| packetService.emit(packet); |
| } |
| |
| private void processReplyFromExternal(IPv4 ipPacket, InstancePort instPort) { |
| |
| if (instPort.networkId() == null) { |
| return; |
| } |
| |
| ICMP icmpReply = (ICMP) ipPacket.getPayload(); |
| |
| icmpReply.resetChecksum(); |
| |
| ipPacket.setDestinationAddress(instPort.ipAddress().getIp4Address().toInt()) |
| .resetChecksum(); |
| ipPacket.setPayload(icmpReply); |
| |
| Ethernet icmpResponseEth = new Ethernet(); |
| icmpResponseEth.setEtherType(Ethernet.TYPE_IPV4) |
| .setSourceMACAddress(Constants.DEFAULT_GATEWAY_MAC) |
| .setDestinationMACAddress(instPort.macAddress()) |
| .setPayload(ipPacket); |
| |
| sendReply(icmpResponseEth, instPort); |
| } |
| |
| private void sendReply(Ethernet icmpReply, InstancePort instPort) { |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .setOutput(instPort.portNumber()) |
| .build(); |
| |
| OutboundPacket packet = new DefaultOutboundPacket( |
| instPort.deviceId(), |
| treatment, |
| ByteBuffer.wrap(icmpReply.serialize())); |
| |
| packetService.emit(packet); |
| } |
| |
| private short getIcmpId(ICMP icmp) { |
| return ((ICMPEcho) icmp.getPayload()).getIdentifier(); |
| } |
| |
| private class InternalPacketProcessor implements PacketProcessor { |
| |
| @Override |
| public void process(PacketContext context) { |
| Set<DeviceId> gateways = osNodeService.completeNodes(GATEWAY) |
| .stream().map(OpenstackNode::intgBridge) |
| .collect(Collectors.toSet()); |
| |
| if (context.isHandled()) { |
| return; |
| } |
| |
| if (!gateways.isEmpty() && !gateways.contains(context.inPacket().receivedFrom().deviceId())) { |
| return; |
| } |
| |
| InboundPacket pkt = context.inPacket(); |
| Ethernet ethernet = pkt.parsed(); |
| if (ethernet == null || ethernet.getEtherType() != Ethernet.TYPE_IPV4) { |
| return; |
| } |
| |
| IPv4 iPacket = (IPv4) ethernet.getPayload(); |
| if (iPacket.getProtocol() == IPv4.PROTOCOL_ICMP) { |
| eventExecutor.execute(() -> processIcmpPacket(context, 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())); |
| |
| switch (icmp.getIcmpType()) { |
| case TYPE_ECHO_REQUEST: |
| if (handleEchoRequest(context.inPacket().receivedFrom().deviceId(), |
| ethernet.getSourceMAC(), |
| ipPacket, |
| icmp)) { |
| context.block(); |
| } |
| break; |
| case TYPE_ECHO_REPLY: |
| if (handleEchoReply(ipPacket, icmp)) { |
| context.block(); |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| } |