| /* |
| * Copyright 2016-present 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.openstacknetworking.routing; |
| |
| 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.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.openstackinterface.OpenstackInterfaceService; |
| import org.onosproject.openstackinterface.OpenstackPort; |
| import org.onosproject.scalablegateway.api.ScalableGatewayService; |
| import org.onosproject.openstacknetworking.Constants; |
| import org.slf4j.Logger; |
| |
| import java.nio.ByteBuffer; |
| import java.util.concurrent.ExecutorService; |
| |
| import static java.util.concurrent.Executors.newSingleThreadExecutor; |
| import static org.onlab.util.Tools.groupedThreads; |
| import static org.onosproject.openstacknetworking.Constants.DEVICE_OWNER_FLOATING_IP; |
| import static org.onosproject.openstacknetworking.Constants.DEVICE_OWNER_ROUTER_GATEWAY; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Handle ARP, ICMP and NAT packets from gateway nodes. |
| */ |
| @Component(immediate = true) |
| public class OpenstackRoutingArpHandler { |
| private final Logger log = getLogger(getClass()); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected PacketService packetService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected OpenstackInterfaceService openstackService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected ScalableGatewayService gatewayService; |
| |
| private final ExecutorService executorService = |
| newSingleThreadExecutor(groupedThreads("onos/openstackrouting", "packet-event", log)); |
| |
| private final InternalPacketProcessor packetProcessor = new InternalPacketProcessor(); |
| |
| @Activate |
| protected void activate() { |
| packetService.addProcessor(packetProcessor, PacketProcessor.director(1)); |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| packetService.removeProcessor(packetProcessor); |
| log.info("Stopped"); |
| } |
| |
| private void processArpPacket(PacketContext context, Ethernet ethernet) { |
| ARP arp = (ARP) ethernet.getPayload(); |
| log.trace("arpEvent called from {} to {}", |
| Ip4Address.valueOf(arp.getSenderProtocolAddress()).toString(), |
| Ip4Address.valueOf(arp.getTargetProtocolAddress()).toString()); |
| |
| if (arp.getOpCode() != ARP.OP_REQUEST) { |
| return; |
| } |
| |
| IpAddress targetIp = Ip4Address.valueOf(arp.getTargetProtocolAddress()); |
| if (getTargetMacForTargetIp(targetIp.getIp4Address()) == MacAddress.NONE) { |
| 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()))); |
| } |
| |
| private class InternalPacketProcessor implements PacketProcessor { |
| |
| @Override |
| public void process(PacketContext context) { |
| if (context.isHandled()) { |
| return; |
| } else if (!gatewayService.getGatewayDeviceIds().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) { |
| executorService.execute(() -> processArpPacket(context, ethernet)); |
| } |
| } |
| } |
| |
| // TODO make a cache for the MAC, not a good idea to REST call every time it gets ARP request |
| private MacAddress getTargetMacForTargetIp(Ip4Address targetIp) { |
| OpenstackPort port = openstackService.ports().stream() |
| .filter(p -> p.deviceOwner().equals(DEVICE_OWNER_ROUTER_GATEWAY) || |
| p.deviceOwner().equals(DEVICE_OWNER_FLOATING_IP)) |
| .filter(p -> p.fixedIps().containsValue(targetIp.getIp4Address())) |
| .findAny().orElse(null); |
| |
| return port == null ? MacAddress.NONE : port.macAddress(); |
| } |
| } |