| /* |
| * 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 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.ARP; |
| import org.onlab.packet.Ethernet; |
| import org.onlab.packet.Ip4Address; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.MacAddress; |
| 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.PacketContext; |
| import org.onosproject.net.packet.PacketProcessor; |
| import org.onosproject.net.packet.PacketService; |
| import org.onosproject.openstacknetworking.api.OpenstackNetworkService; |
| import org.onosproject.openstacknetworking.api.Constants; |
| import org.onosproject.openstacknode.api.OpenstackNode; |
| import org.onosproject.openstacknode.api.OpenstackNodeService; |
| import org.slf4j.Logger; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Objects; |
| import java.util.Set; |
| import java.util.concurrent.ExecutorService; |
| import java.util.stream.Collectors; |
| |
| import static java.util.concurrent.Executors.newSingleThreadExecutor; |
| import static org.onlab.util.Tools.groupedThreads; |
| import static org.onosproject.openstacknode.api.OpenstackNode.NodeType.GATEWAY; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Handle ARP requests from gateway nodes. |
| */ |
| @Component(immediate = true) |
| public class OpenstackRoutingArpHandler { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| private static final String DEVICE_OWNER_ROUTER_GW = "network:router_gateway"; |
| private static final String DEVICE_OWNER_FLOATING_IP = "network:floatingip"; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected PacketService packetService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected OpenstackNetworkService osNetworkService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected OpenstackNodeService osNodeService; |
| |
| private final ExecutorService eventExecutor = newSingleThreadExecutor( |
| groupedThreads(this.getClass().getSimpleName(), "event-handler", log)); |
| |
| private final PacketProcessor packetProcessor = new InternalPacketProcessor(); |
| |
| @Activate |
| protected void activate() { |
| packetService.addProcessor(packetProcessor, PacketProcessor.director(1)); |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| packetService.removeProcessor(packetProcessor); |
| eventExecutor.shutdown(); |
| log.info("Stopped"); |
| } |
| |
| private void processArpPacket(PacketContext context, Ethernet ethernet) { |
| ARP arp = (ARP) ethernet.getPayload(); |
| if (arp.getOpCode() != ARP.OP_REQUEST) { |
| return; |
| } |
| |
| if (log.isTraceEnabled()) { |
| log.trace("ARP request received from {} for {}", |
| Ip4Address.valueOf(arp.getSenderProtocolAddress()).toString(), |
| Ip4Address.valueOf(arp.getTargetProtocolAddress()).toString()); |
| } |
| |
| IpAddress targetIp = Ip4Address.valueOf(arp.getTargetProtocolAddress()); |
| if (!isServiceIp(targetIp.getIp4Address())) { |
| log.trace("Unknown target ARP request for {}, ignore it", targetIp); |
| return; |
| } |
| |
| MacAddress targetMac = Constants.DEFAULT_EXTERNAL_ROUTER_MAC; |
| Ethernet ethReply = ARP.buildArpReply(targetIp.getIp4Address(), |
| targetMac, ethernet); |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .setOutput(context.inPacket().receivedFrom().port()) |
| .build(); |
| |
| packetService.emit(new DefaultOutboundPacket( |
| context.inPacket().receivedFrom().deviceId(), |
| treatment, |
| ByteBuffer.wrap(ethReply.serialize()))); |
| |
| context.block(); |
| } |
| |
| private class InternalPacketProcessor implements PacketProcessor { |
| |
| @Override |
| public void process(PacketContext context) { |
| if (context.isHandled()) { |
| return; |
| } |
| |
| Set<DeviceId> gateways = osNodeService.completeNodes(GATEWAY) |
| .stream().map(OpenstackNode::intgBridge) |
| .collect(Collectors.toSet()); |
| |
| if (!gateways.contains(context.inPacket().receivedFrom().deviceId())) { |
| // return if the packet is not from gateway nodes |
| return; |
| } |
| |
| InboundPacket pkt = context.inPacket(); |
| Ethernet ethernet = pkt.parsed(); |
| if (ethernet != null && |
| ethernet.getEtherType() == Ethernet.TYPE_ARP) { |
| eventExecutor.execute(() -> processArpPacket(context, ethernet)); |
| } |
| } |
| } |
| |
| private boolean isServiceIp(IpAddress targetIp) { |
| // FIXME use floating IP and external gateway information of router instead |
| // once openstack4j fixed |
| return osNetworkService.ports().stream() |
| .filter(osPort -> Objects.equals(osPort.getDeviceOwner(), |
| DEVICE_OWNER_ROUTER_GW) || |
| Objects.equals(osPort.getDeviceOwner(), |
| DEVICE_OWNER_FLOATING_IP)) |
| .flatMap(osPort -> osPort.getFixedIps().stream()) |
| .anyMatch(ip -> IpAddress.valueOf(ip.getIpAddress()).equals(targetIp)); |
| } |
| } |