| /* |
| * Copyright 2015 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.reactive.routing; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| import java.nio.ByteBuffer; |
| |
| 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.IPv4; |
| import org.onlab.packet.Ip4Address; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.MacAddress; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.core.CoreService; |
| import org.onosproject.net.ConnectPoint; |
| 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.OutboundPacket; |
| import org.onosproject.net.packet.PacketContext; |
| import org.onosproject.net.packet.PacketPriority; |
| import org.onosproject.net.packet.PacketProcessor; |
| import org.onosproject.net.packet.PacketService; |
| import org.onosproject.routing.RoutingService; |
| import org.onosproject.routing.config.RoutingConfigurationService; |
| import org.slf4j.Logger; |
| |
| /** |
| * This is reactive routing to handle 3 cases: |
| * (1) one host wants to talk to another host, both two hosts are in |
| * SDN network. |
| * (2) one host in SDN network wants to talk to another host in Internet. |
| * (3) one host from Internet wants to talk to another host in SDN network. |
| */ |
| @Component(immediate = true) |
| public class SdnIpReactiveRouting { |
| |
| private static final String APP_NAME = "org.onosproject.reactive.routing"; |
| private final Logger log = getLogger(getClass()); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected PacketService packetService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected RoutingService routingService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected RoutingConfigurationService config; |
| |
| private ApplicationId appId; |
| |
| private ReactiveRoutingProcessor processor = |
| new ReactiveRoutingProcessor(); |
| |
| @Activate |
| public void activate() { |
| appId = coreService.registerApplication(APP_NAME); |
| packetService.addProcessor(processor, |
| PacketProcessor.ADVISOR_MAX + 2); |
| |
| TrafficSelector.Builder selector = DefaultTrafficSelector.builder(); |
| // TODO: to support IPv6 later |
| selector.matchEthType(Ethernet.TYPE_IPV4); |
| packetService.requestPackets(selector.build(), |
| PacketPriority.REACTIVE, appId); |
| selector.matchEthType(Ethernet.TYPE_ARP); |
| packetService.requestPackets(selector.build(), |
| PacketPriority.REACTIVE, appId); |
| |
| log.info("SDN-IP Reactive Routing Started"); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| packetService.removeProcessor(processor); |
| processor = null; |
| log.info("SDN-IP Reactive Routing Stopped"); |
| } |
| |
| private class ReactiveRoutingProcessor implements PacketProcessor { |
| @Override |
| public void process(PacketContext context) { |
| |
| InboundPacket pkt = context.inPacket(); |
| Ethernet ethPkt = pkt.parsed(); |
| if (ethPkt == null) { |
| return; |
| } |
| ConnectPoint srcConnectPoint = pkt.receivedFrom(); |
| |
| switch (ethPkt.getEtherType()) { |
| case Ethernet.TYPE_ARP: |
| ARP arpPacket = (ARP) ethPkt.getPayload(); |
| Ip4Address targetIpAddress = Ip4Address |
| .valueOf(arpPacket.getTargetProtocolAddress()); |
| // Only when it is an ARP request packet and the target IP |
| // address is a virtual gateway IP address, then it will be |
| // processed. |
| if (arpPacket.getOpCode() == ARP.OP_REQUEST |
| && config.isVirtualGatewayIpAddress(targetIpAddress)) { |
| MacAddress gatewayMacAddress = |
| config.getVirtualGatewayMacAddress(); |
| if (gatewayMacAddress == null) { |
| break; |
| } |
| Ethernet eth = ARP.buildArpReply(targetIpAddress, |
| gatewayMacAddress, |
| ethPkt); |
| |
| TrafficTreatment.Builder builder = |
| DefaultTrafficTreatment.builder(); |
| builder.setOutput(srcConnectPoint.port()); |
| packetService.emit(new DefaultOutboundPacket( |
| srcConnectPoint.deviceId(), |
| builder.build(), |
| ByteBuffer.wrap(eth.serialize()))); |
| } |
| break; |
| case Ethernet.TYPE_IPV4: |
| // Parse packet |
| IPv4 ipv4Packet = (IPv4) ethPkt.getPayload(); |
| IpAddress dstIp = |
| IpAddress.valueOf(ipv4Packet.getDestinationAddress()); |
| IpAddress srcIp = |
| IpAddress.valueOf(ipv4Packet.getSourceAddress()); |
| MacAddress srcMac = ethPkt.getSourceMAC(); |
| routingService.packetReactiveProcessor(dstIp, srcIp, |
| srcConnectPoint, srcMac); |
| |
| // TODO emit packet first or packetReactiveProcessor first |
| ConnectPoint egressConnectPoint = null; |
| egressConnectPoint = routingService.getEgressConnectPoint(dstIp); |
| if (egressConnectPoint != null) { |
| forwardPacketToDst(context, egressConnectPoint); |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| |
| /** |
| * Emits the specified packet onto the network. |
| * |
| * @param context the packet context |
| * @param connectPoint the connect point where the packet should be |
| * sent out |
| */ |
| private void forwardPacketToDst(PacketContext context, |
| ConnectPoint connectPoint) { |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .setOutput(connectPoint.port()).build(); |
| OutboundPacket packet = |
| new DefaultOutboundPacket(connectPoint.deviceId(), treatment, |
| context.inPacket().unparsed()); |
| packetService.emit(packet); |
| log.trace("sending packet: {}", packet); |
| } |
| |
| } |
| |