Jonathan Hart | 63eeac3 | 2016-06-20 15:55:16 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2016-present Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package org.onosproject.routing.impl; |
| 18 | |
| 19 | import com.google.common.cache.Cache; |
| 20 | import com.google.common.cache.CacheBuilder; |
| 21 | import org.apache.felix.scr.annotations.Activate; |
| 22 | import org.apache.felix.scr.annotations.Component; |
| 23 | import org.apache.felix.scr.annotations.Deactivate; |
| 24 | import org.apache.felix.scr.annotations.Modified; |
| 25 | import org.apache.felix.scr.annotations.Property; |
| 26 | import org.apache.felix.scr.annotations.Reference; |
| 27 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 28 | import org.onlab.packet.EthType; |
| 29 | import org.onlab.packet.Ethernet; |
| 30 | import org.onlab.packet.IPv4; |
| 31 | import org.onlab.packet.Ip4Address; |
| 32 | import org.onlab.packet.IpAddress; |
| 33 | import org.onlab.packet.MacAddress; |
| 34 | import org.onlab.packet.VlanId; |
| 35 | import org.onlab.util.Tools; |
| 36 | import org.onosproject.cfg.ComponentConfigService; |
| 37 | import org.onosproject.core.ApplicationId; |
| 38 | import org.onosproject.core.CoreService; |
| 39 | import org.onosproject.incubator.net.intf.Interface; |
| 40 | import org.onosproject.incubator.net.intf.InterfaceService; |
| 41 | import org.onosproject.net.ConnectPoint; |
| 42 | import org.onosproject.net.Host; |
| 43 | import org.onosproject.net.flow.DefaultTrafficSelector; |
| 44 | import org.onosproject.net.flow.DefaultTrafficTreatment; |
| 45 | import org.onosproject.net.flow.TrafficSelector; |
| 46 | import org.onosproject.net.host.HostEvent; |
| 47 | import org.onosproject.net.host.HostListener; |
| 48 | import org.onosproject.net.host.HostService; |
| 49 | import org.onosproject.net.packet.DefaultOutboundPacket; |
| 50 | import org.onosproject.net.packet.OutboundPacket; |
| 51 | import org.onosproject.net.packet.PacketContext; |
| 52 | import org.onosproject.net.packet.PacketPriority; |
| 53 | import org.onosproject.net.packet.PacketProcessor; |
| 54 | import org.onosproject.net.packet.PacketService; |
| 55 | import org.osgi.service.component.ComponentContext; |
| 56 | import org.slf4j.Logger; |
| 57 | import org.slf4j.LoggerFactory; |
| 58 | |
| 59 | import java.nio.ByteBuffer; |
| 60 | import java.util.Optional; |
| 61 | import java.util.Queue; |
| 62 | import java.util.concurrent.ConcurrentLinkedQueue; |
| 63 | import java.util.concurrent.TimeUnit; |
| 64 | |
| 65 | import static com.google.common.base.Preconditions.checkNotNull; |
| 66 | |
| 67 | /** |
| 68 | * Reactively handles sending packets to hosts that are directly connected to |
| 69 | * router interfaces. |
| 70 | */ |
| 71 | @Component(immediate = true, enabled = false) |
| 72 | public class DirectHostManager { |
| 73 | |
| 74 | private Logger log = LoggerFactory.getLogger(getClass()); |
| 75 | |
| 76 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 77 | protected PacketService packetService; |
| 78 | |
| 79 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 80 | protected InterfaceService interfaceService; |
| 81 | |
| 82 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 83 | protected HostService hostService; |
| 84 | |
| 85 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 86 | protected CoreService coreService; |
| 87 | |
| 88 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 89 | protected ComponentConfigService componentConfigService; |
| 90 | |
| 91 | private static final boolean DEFAULT_ENABLED = false; |
| 92 | |
| 93 | @Property(name = "enabled", boolValue = DEFAULT_ENABLED, |
| 94 | label = "Enable reactive directly-connected host processing") |
| 95 | private volatile boolean enabled = DEFAULT_ENABLED; |
| 96 | |
| 97 | private static final String APP_NAME = "org.onosproject.directhost"; |
| 98 | |
| 99 | private static final long MAX_QUEUED_PACKETS = 10000; |
| 100 | private static final long MAX_QUEUE_DURATION = 2; // seconds |
| 101 | |
| 102 | private ApplicationId appId; |
| 103 | |
| 104 | private InternalPacketProcessor packetProcessor = new InternalPacketProcessor(); |
| 105 | private InternalHostListener hostListener = new InternalHostListener(); |
| 106 | |
| 107 | private Cache<IpAddress, Queue<IPv4>> ipPacketCache = CacheBuilder.newBuilder() |
| 108 | .weigher((IpAddress key, Queue<IPv4> value) -> value.size()) |
| 109 | .maximumWeight(MAX_QUEUED_PACKETS) |
| 110 | .expireAfterAccess(MAX_QUEUE_DURATION, TimeUnit.SECONDS) |
| 111 | .build(); |
| 112 | |
| 113 | @Activate |
| 114 | public void activate(ComponentContext context) { |
| 115 | componentConfigService.registerProperties(getClass()); |
| 116 | modified(context); |
| 117 | |
| 118 | appId = coreService.registerApplication(APP_NAME); |
| 119 | |
| 120 | if (enabled) { |
| 121 | enable(); |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | @Modified |
| 126 | private void modified(ComponentContext context) { |
| 127 | Boolean boolEnabled = Tools.isPropertyEnabled(context.getProperties(), "enabled"); |
| 128 | if (boolEnabled != null) { |
| 129 | if (enabled && !boolEnabled) { |
| 130 | enabled = false; |
| 131 | disable(); |
| 132 | } else if (!enabled && boolEnabled) { |
| 133 | enabled = true; |
| 134 | enable(); |
| 135 | } |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | private void enable() { |
| 140 | hostService.addListener(hostListener); |
| 141 | packetService.addProcessor(packetProcessor, PacketProcessor.director(3)); |
| 142 | |
| 143 | TrafficSelector selector = DefaultTrafficSelector.builder() |
| 144 | .matchEthType(EthType.EtherType.IPV4.ethType().toShort()).build(); |
| 145 | packetService.requestPackets(selector, PacketPriority.REACTIVE, appId, Optional.empty()); |
| 146 | } |
| 147 | |
| 148 | private void disable() { |
| 149 | packetService.removeProcessor(packetProcessor); |
| 150 | hostService.removeListener(hostListener); |
| 151 | |
| 152 | TrafficSelector selector = DefaultTrafficSelector.builder() |
| 153 | .matchEthType(EthType.EtherType.IPV4.ethType().toShort()).build(); |
| 154 | packetService.cancelPackets(selector, PacketPriority.REACTIVE, appId, Optional.empty()); |
| 155 | } |
| 156 | |
| 157 | @Deactivate |
| 158 | public void deactivate() { |
| 159 | disable(); |
| 160 | |
| 161 | componentConfigService.unregisterProperties(getClass(), false); |
| 162 | } |
| 163 | |
| 164 | private void handle(Ethernet eth) { |
| 165 | checkNotNull(eth); |
| 166 | |
| 167 | if (!(eth.getEtherType() == EthType.EtherType.IPV4.ethType().toShort())) { |
| 168 | return; |
| 169 | } |
| 170 | |
| 171 | IPv4 ipv4 = (IPv4) eth.getPayload().clone(); |
| 172 | |
| 173 | Ip4Address dstIp = Ip4Address.valueOf(ipv4.getDestinationAddress()); |
| 174 | |
| 175 | Interface egressInterface = interfaceService.getMatchingInterface(dstIp); |
| 176 | |
| 177 | if (egressInterface == null) { |
| 178 | log.info("No egress interface found for {}", dstIp); |
| 179 | return; |
| 180 | } |
| 181 | |
| 182 | Optional<Host> host = hostService.getHostsByIp(dstIp).stream() |
| 183 | .filter(h -> h.location().equals(egressInterface.connectPoint())) |
| 184 | .filter(h -> h.vlan().equals(egressInterface.vlan())) |
| 185 | .findAny(); |
| 186 | |
| 187 | if (host.isPresent()) { |
| 188 | transformAndSend(ipv4, egressInterface, host.get().mac()); |
| 189 | } else { |
| 190 | hostService.startMonitoringIp(dstIp); |
| 191 | ipPacketCache.asMap().compute(dstIp, (ip, queue) -> { |
| 192 | if (queue == null) { |
| 193 | queue = new ConcurrentLinkedQueue(); |
| 194 | } |
| 195 | queue.add(ipv4); |
| 196 | return queue; |
| 197 | }); |
| 198 | } |
| 199 | } |
| 200 | |
| 201 | private void transformAndSend(IPv4 ipv4, Interface egressInterface, MacAddress macAddress) { |
| 202 | |
| 203 | Ethernet eth = new Ethernet(); |
| 204 | eth.setDestinationMACAddress(macAddress); |
| 205 | eth.setSourceMACAddress(egressInterface.mac()); |
| 206 | eth.setEtherType(EthType.EtherType.IPV4.ethType().toShort()); |
| 207 | eth.setPayload(ipv4); |
| 208 | if (!egressInterface.vlan().equals(VlanId.NONE)) { |
| 209 | eth.setVlanID(egressInterface.vlan().toShort()); |
| 210 | } |
| 211 | |
| 212 | ipv4.setTtl((byte) (ipv4.getTtl() - 1)); |
| 213 | ipv4.setChecksum((short) 0); |
| 214 | |
| 215 | send(eth, egressInterface.connectPoint()); |
| 216 | } |
| 217 | |
| 218 | private void send(Ethernet eth, ConnectPoint cp) { |
| 219 | OutboundPacket packet = new DefaultOutboundPacket(cp.deviceId(), |
| 220 | DefaultTrafficTreatment.builder().setOutput(cp.port()).build(), ByteBuffer.wrap(eth.serialize())); |
| 221 | packetService.emit(packet); |
| 222 | } |
| 223 | |
| 224 | private void sendQueued(IpAddress ipAddress, MacAddress macAddress) { |
| 225 | log.debug("Sending queued packets for {} ({})", ipAddress, macAddress); |
| 226 | ipPacketCache.asMap().computeIfPresent(ipAddress, (ip, packets) -> { |
| 227 | packets.forEach(ipv4 -> { |
| 228 | Interface egressInterface = interfaceService.getMatchingInterface(ipAddress); |
| 229 | |
| 230 | if (egressInterface == null) { |
| 231 | log.info("No egress interface found for {}", ipAddress); |
| 232 | return; |
| 233 | } |
| 234 | |
| 235 | transformAndSend(ipv4, egressInterface, macAddress); |
| 236 | }); |
| 237 | return null; |
| 238 | }); |
| 239 | } |
| 240 | |
| 241 | private class InternalPacketProcessor implements PacketProcessor { |
| 242 | |
| 243 | @Override |
| 244 | public void process(PacketContext context) { |
| 245 | if (context.isHandled()) { |
| 246 | return; |
| 247 | } |
| 248 | |
| 249 | if (interfaceService.getInterfacesByPort(context.inPacket().receivedFrom()).isEmpty()) { |
| 250 | // Don't handle packets that don't come from one of our configured interfaces |
| 251 | return; |
| 252 | } |
| 253 | |
| 254 | Ethernet eth = context.inPacket().parsed(); |
| 255 | if (eth == null) { |
| 256 | return; |
| 257 | } |
| 258 | |
| 259 | handle(eth); |
| 260 | |
| 261 | context.block(); |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | private class InternalHostListener implements HostListener { |
| 266 | @Override |
| 267 | public void event(HostEvent event) { |
| 268 | switch (event.type()) { |
| 269 | case HOST_ADDED: |
| 270 | event.subject().ipAddresses().forEach(ip -> |
| 271 | DirectHostManager.this.sendQueued(ip, event.subject().mac())); |
| 272 | break; |
| 273 | case HOST_REMOVED: |
| 274 | case HOST_UPDATED: |
| 275 | case HOST_MOVED: |
| 276 | default: |
| 277 | break; |
| 278 | } |
| 279 | } |
| 280 | } |
| 281 | } |