Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 1 | package net.floodlightcontroller.virtualnetwork; |
| 2 | |
| 3 | import java.io.IOException; |
| 4 | import java.util.ArrayList; |
| 5 | import java.util.Collection; |
| 6 | import java.util.Collections; |
| 7 | import java.util.HashMap; |
| 8 | import java.util.HashSet; |
| 9 | import java.util.List; |
| 10 | import java.util.Map; |
| 11 | import java.util.Map.Entry; |
| 12 | import java.util.Set; |
| 13 | import java.util.concurrent.ConcurrentHashMap; |
| 14 | |
| 15 | import org.openflow.protocol.OFFlowMod; |
| 16 | import org.openflow.protocol.OFMatch; |
| 17 | import org.openflow.protocol.OFMessage; |
| 18 | import org.openflow.protocol.OFPacketIn; |
| 19 | import org.openflow.protocol.OFPacketOut; |
| 20 | import org.openflow.protocol.OFType; |
| 21 | import org.openflow.protocol.action.OFAction; |
| 22 | import org.openflow.util.HexString; |
| 23 | import org.slf4j.Logger; |
| 24 | import org.slf4j.LoggerFactory; |
| 25 | |
| 26 | import net.floodlightcontroller.core.FloodlightContext; |
| 27 | import net.floodlightcontroller.core.IFloodlightProviderService; |
| 28 | import net.floodlightcontroller.core.IOFMessageListener; |
| 29 | import net.floodlightcontroller.core.IOFSwitch; |
| 30 | import net.floodlightcontroller.core.module.FloodlightModuleContext; |
| 31 | import net.floodlightcontroller.core.module.FloodlightModuleException; |
| 32 | import net.floodlightcontroller.core.module.IFloodlightModule; |
| 33 | import net.floodlightcontroller.core.module.IFloodlightService; |
| 34 | import net.floodlightcontroller.core.util.AppCookie; |
| 35 | import net.floodlightcontroller.devicemanager.IDevice; |
| 36 | import net.floodlightcontroller.devicemanager.IDeviceListener; |
| 37 | import net.floodlightcontroller.devicemanager.IDeviceService; |
| 38 | import net.floodlightcontroller.packet.DHCP; |
| 39 | import net.floodlightcontroller.packet.Ethernet; |
| 40 | import net.floodlightcontroller.packet.IPacket; |
| 41 | import net.floodlightcontroller.packet.IPv4; |
| 42 | import net.floodlightcontroller.restserver.IRestApiService; |
| 43 | import net.floodlightcontroller.routing.ForwardingBase; |
| 44 | import net.floodlightcontroller.util.MACAddress; |
| 45 | |
| 46 | /** |
| 47 | * A simple Layer 2 (MAC based) network virtualization module. This module allows |
| 48 | * you to create simple L2 networks (host + gateway) and will drop traffic if |
| 49 | * they are not on the same virtual network. |
| 50 | * |
| 51 | * LIMITATIONS |
| 52 | * - This module does not allow overlapping of IPs or MACs |
| 53 | * - You can only have 1 gateway per virtual network (can be shared) |
| 54 | * - There is filtering of multicast/broadcast traffic |
| 55 | * - All DHCP traffic will be allowed, regardless of unicast/broadcast |
| 56 | * |
| 57 | * @author alexreimers |
| 58 | */ |
| 59 | public class VirtualNetworkFilter |
| 60 | implements IFloodlightModule, IVirtualNetworkService, IOFMessageListener, IDeviceListener { |
| 61 | protected static Logger log = LoggerFactory.getLogger(VirtualNetworkFilter.class); |
| 62 | |
| 63 | private final short APP_ID = 20; |
| 64 | |
| 65 | // Our dependencies |
| 66 | IFloodlightProviderService floodlightProvider; |
| 67 | IRestApiService restApi; |
| 68 | IDeviceService deviceService; |
| 69 | |
| 70 | // Our internal state |
| 71 | protected Map<String, VirtualNetwork> vNetsByGuid; // List of all created virtual networks |
| 72 | protected Map<String, String> nameToGuid; // Logical name -> Network ID |
| 73 | protected Map<String, Integer> guidToGateway; // Network ID -> Gateway IP |
| 74 | protected Map<Integer, Set<String>> gatewayToGuid; // Gateway IP -> Network ID |
| 75 | protected Map<MACAddress, Integer> macToGateway; // Gateway MAC -> Gateway IP |
| 76 | protected Map<MACAddress, String> macToGuid; // Host MAC -> Network ID |
| 77 | protected Map<String, MACAddress> portToMac; // Host MAC -> logical port name |
| 78 | |
| 79 | /** |
| 80 | * Adds a gateway to a virtual network. |
| 81 | * @param guid The ID (not name) of the network. |
| 82 | * @param ip The IP addresses of the gateway. |
| 83 | */ |
| 84 | protected void addGateway(String guid, Integer ip) { |
| 85 | if (ip.intValue() != 0) { |
| 86 | if (log.isDebugEnabled()) |
| 87 | log.debug("Adding {} as gateway for GUID {}", |
| 88 | IPv4.fromIPv4Address(ip), guid); |
| 89 | |
| 90 | guidToGateway.put(guid, ip); |
| 91 | if (vNetsByGuid.get(guid) != null) |
| 92 | vNetsByGuid.get(guid).setGateway(IPv4.fromIPv4Address(ip)); |
| 93 | if (gatewayToGuid.containsKey(ip)) { |
| 94 | Set<String> gSet = gatewayToGuid.get(ip); |
| 95 | gSet.add(guid); |
| 96 | } else { |
| 97 | Set<String> gSet = Collections.synchronizedSet(new HashSet<String>()); |
| 98 | gSet.add(guid); |
| 99 | gatewayToGuid.put(ip, gSet); |
| 100 | } |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | /** |
| 105 | * Deletes a gateway for a virtual network. |
| 106 | * @param guid The ID (not name) of the network to delete |
| 107 | * the gateway for. |
| 108 | */ |
| 109 | protected void deleteGateway(String guid) { |
| 110 | Integer gwIp = guidToGateway.remove(guid); |
| 111 | if (gwIp == null) return; |
| 112 | Set<String> gSet = gatewayToGuid.get(gwIp); |
| 113 | gSet.remove(guid); |
| 114 | if(vNetsByGuid.get(guid)!=null) |
| 115 | vNetsByGuid.get(guid).setGateway(null); |
| 116 | } |
| 117 | |
| 118 | // IVirtualNetworkService |
| 119 | |
| 120 | @Override |
| 121 | public void createNetwork(String guid, String network, Integer gateway) { |
| 122 | if (log.isDebugEnabled()) { |
| 123 | String gw = null; |
| 124 | try { |
| 125 | gw = IPv4.fromIPv4Address(gateway); |
| 126 | } catch (Exception e) { |
| 127 | // fail silently |
| 128 | } |
| 129 | log.debug("Creating network {} with ID {} and gateway {}", |
| 130 | new Object[] {network, guid, gw}); |
| 131 | } |
| 132 | |
| 133 | if (!nameToGuid.isEmpty()) { |
| 134 | // We have to iterate all the networks to handle name/gateway changes |
| 135 | for (Entry<String, String> entry : nameToGuid.entrySet()) { |
| 136 | if (entry.getValue().equals(guid)) { |
| 137 | nameToGuid.remove(entry.getKey()); |
| 138 | break; |
| 139 | } |
| 140 | } |
| 141 | } |
| 142 | nameToGuid.put(network, guid); |
| 143 | if (vNetsByGuid.containsKey(guid)) |
| 144 | vNetsByGuid.get(guid).setName(network); //network already exists, just updating name |
| 145 | else |
| 146 | vNetsByGuid.put(guid, new VirtualNetwork(network, guid)); //new network |
| 147 | |
| 148 | // If they don't specify a new gateway the old one will be preserved |
| 149 | if ((gateway != null) && (gateway != 0)) { |
| 150 | addGateway(guid, gateway); |
| 151 | if(vNetsByGuid.get(guid)!=null) |
| 152 | vNetsByGuid.get(guid).setGateway(IPv4.fromIPv4Address(gateway)); |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | @Override |
| 157 | public void deleteNetwork(String guid) { |
| 158 | String name = null; |
| 159 | if (nameToGuid.isEmpty()) { |
| 160 | log.warn("Could not delete network with ID {}, network doesn't exist", |
| 161 | guid); |
| 162 | return; |
| 163 | } |
| 164 | for (Entry<String, String> entry : nameToGuid.entrySet()) { |
| 165 | if (entry.getValue().equals(guid)) { |
| 166 | name = entry.getKey(); |
| 167 | break; |
| 168 | } |
| 169 | log.warn("Could not delete network with ID {}, network doesn't exist", |
| 170 | guid); |
| 171 | } |
| 172 | |
| 173 | if (log.isDebugEnabled()) |
| 174 | log.debug("Deleting network with name {} ID {}", name, guid); |
| 175 | |
| 176 | nameToGuid.remove(name); |
| 177 | deleteGateway(guid); |
| 178 | if(vNetsByGuid.get(guid)!=null){ |
| 179 | vNetsByGuid.get(guid).clearHosts(); |
| 180 | vNetsByGuid.remove(guid); |
| 181 | } |
| 182 | Collection<MACAddress> deleteList = new ArrayList<MACAddress>(); |
| 183 | for (MACAddress host : macToGuid.keySet()) { |
| 184 | if (macToGuid.get(host).equals(guid)) { |
| 185 | deleteList.add(host); |
| 186 | } |
| 187 | } |
| 188 | for (MACAddress mac : deleteList) { |
| 189 | if (log.isDebugEnabled()) { |
| 190 | log.debug("Removing host {} from network {}", |
| 191 | HexString.toHexString(mac.toBytes()), guid); |
| 192 | } |
| 193 | macToGuid.remove(mac); |
| 194 | for (Entry<String, MACAddress> entry : portToMac.entrySet()) { |
| 195 | if (entry.getValue().equals(mac)) { |
| 196 | portToMac.remove(entry.getKey()); |
| 197 | break; |
| 198 | } |
| 199 | } |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | @Override |
| 204 | public void addHost(MACAddress mac, String guid, String port) { |
| 205 | if (guid != null) { |
| 206 | if (log.isDebugEnabled()) { |
| 207 | log.debug("Adding {} to network ID {} on port {}", |
| 208 | new Object[] {mac, guid, port}); |
| 209 | } |
| 210 | // We ignore old mappings |
| 211 | macToGuid.put(mac, guid); |
| 212 | portToMac.put(port, mac); |
| 213 | if(vNetsByGuid.get(guid)!=null) |
| 214 | vNetsByGuid.get(guid).addHost(new MACAddress(mac.toBytes())); |
| 215 | } else { |
| 216 | log.warn("Could not add MAC {} to network ID {} on port {}, the network does not exist", |
| 217 | new Object[] {mac, guid, port}); |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | @Override |
| 222 | public void deleteHost(MACAddress mac, String port) { |
| 223 | if (log.isDebugEnabled()) { |
| 224 | log.debug("Removing host {} from port {}", mac, port); |
| 225 | } |
| 226 | if (mac == null && port == null) return; |
| 227 | if (port != null) { |
| 228 | MACAddress host = portToMac.remove(port); |
| 229 | if(vNetsByGuid.get(macToGuid.get(host)) != null) |
| 230 | vNetsByGuid.get(macToGuid.get(host)).removeHost(host); |
| 231 | macToGuid.remove(host); |
| 232 | } else if (mac != null) { |
| 233 | if (!portToMac.isEmpty()) { |
| 234 | for (Entry<String, MACAddress> entry : portToMac.entrySet()) { |
| 235 | if (entry.getValue().equals(mac)) { |
| 236 | if(vNetsByGuid.get(macToGuid.get(entry.getValue())) != null) |
| 237 | vNetsByGuid.get(macToGuid.get(entry.getValue())).removeHost(entry.getValue()); |
| 238 | portToMac.remove(entry.getKey()); |
| 239 | macToGuid.remove(entry.getValue()); |
| 240 | return; |
| 241 | } |
| 242 | } |
| 243 | } |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | // IFloodlightModule |
| 248 | |
| 249 | @Override |
| 250 | public Collection<Class<? extends IFloodlightService>> getModuleServices() { |
| 251 | Collection<Class<? extends IFloodlightService>> l = |
| 252 | new ArrayList<Class<? extends IFloodlightService>>(); |
| 253 | l.add(IVirtualNetworkService.class); |
| 254 | return l; |
| 255 | } |
| 256 | |
| 257 | @Override |
| 258 | public Map<Class<? extends IFloodlightService>, IFloodlightService> |
| 259 | getServiceImpls() { |
| 260 | Map<Class<? extends IFloodlightService>, |
| 261 | IFloodlightService> m = |
| 262 | new HashMap<Class<? extends IFloodlightService>, |
| 263 | IFloodlightService>(); |
| 264 | m.put(IVirtualNetworkService.class, this); |
| 265 | return m; |
| 266 | } |
| 267 | |
| 268 | @Override |
| 269 | public Collection<Class<? extends IFloodlightService>> getModuleDependencies() { |
| 270 | Collection<Class<? extends IFloodlightService>> l = |
| 271 | new ArrayList<Class<? extends IFloodlightService>>(); |
| 272 | l.add(IFloodlightProviderService.class); |
| 273 | l.add(IRestApiService.class); |
| 274 | l.add(IDeviceService.class); |
| 275 | return l; |
| 276 | } |
| 277 | |
| 278 | @Override |
| 279 | public void init(FloodlightModuleContext context) |
| 280 | throws FloodlightModuleException { |
| 281 | floodlightProvider = context.getServiceImpl(IFloodlightProviderService.class); |
| 282 | restApi = context.getServiceImpl(IRestApiService.class); |
| 283 | deviceService = context.getServiceImpl(IDeviceService.class); |
| 284 | |
| 285 | vNetsByGuid = new ConcurrentHashMap<String, VirtualNetwork>(); |
| 286 | nameToGuid = new ConcurrentHashMap<String, String>(); |
| 287 | guidToGateway = new ConcurrentHashMap<String, Integer>(); |
| 288 | gatewayToGuid = new ConcurrentHashMap<Integer, Set<String>>(); |
| 289 | macToGuid = new ConcurrentHashMap<MACAddress, String>(); |
| 290 | portToMac = new ConcurrentHashMap<String, MACAddress>(); |
| 291 | macToGateway = new ConcurrentHashMap<MACAddress, Integer>(); |
| 292 | } |
| 293 | |
| 294 | @Override |
| 295 | public void startUp(FloodlightModuleContext context) { |
| 296 | floodlightProvider.addOFMessageListener(OFType.PACKET_IN, this); |
| 297 | restApi.addRestletRoutable(new VirtualNetworkWebRoutable()); |
| 298 | deviceService.addListener(this); |
| 299 | } |
| 300 | |
| 301 | // IOFMessageListener |
| 302 | |
| 303 | @Override |
| 304 | public String getName() { |
| 305 | return "virtualizer"; |
| 306 | } |
| 307 | |
| 308 | @Override |
| 309 | public boolean isCallbackOrderingPrereq(OFType type, String name) { |
| 310 | // Link discovery should go before us so we don't block LLDPs |
| 311 | return (type.equals(OFType.PACKET_IN) && |
| 312 | (name.equals("linkdiscovery") || (name.equals("devicemanager")))); |
| 313 | } |
| 314 | |
| 315 | @Override |
| 316 | public boolean isCallbackOrderingPostreq(OFType type, String name) { |
| 317 | // We need to go before forwarding |
| 318 | return (type.equals(OFType.PACKET_IN) && name.equals("forwarding")); |
| 319 | } |
| 320 | |
| 321 | @Override |
| 322 | public Command receive(IOFSwitch sw, OFMessage msg, FloodlightContext cntx) { |
| 323 | switch (msg.getType()) { |
| 324 | case PACKET_IN: |
| 325 | return processPacketIn(sw, (OFPacketIn)msg, cntx); |
| 326 | default: |
| 327 | break; |
| 328 | } |
| 329 | log.warn("Received unexpected message {}", msg); |
| 330 | return Command.CONTINUE; |
| 331 | } |
| 332 | |
| 333 | /** |
| 334 | * Checks whether the frame is destined to or from a gateway. |
| 335 | * @param frame The ethernet frame to check. |
| 336 | * @return True if it is to/from a gateway, false otherwise. |
| 337 | */ |
| 338 | protected boolean isDefaultGateway(Ethernet frame) { |
| 339 | if (macToGateway.containsKey(frame.getSourceMAC())) |
| 340 | return true; |
| 341 | |
| 342 | Integer gwIp = macToGateway.get(frame.getDestinationMAC()); |
| 343 | if (gwIp != null) { |
| 344 | MACAddress host = frame.getSourceMAC(); |
| 345 | String srcNet = macToGuid.get(host); |
| 346 | if (srcNet != null) { |
| 347 | Integer gwIpSrcNet = guidToGateway.get(srcNet); |
| 348 | if ((gwIpSrcNet != null) && (gwIp.equals(gwIpSrcNet))) |
| 349 | return true; |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | return false; |
| 354 | } |
| 355 | |
| 356 | /** |
| 357 | * Checks to see if two MAC Addresses are on the same network. |
| 358 | * @param m1 The first MAC. |
| 359 | * @param m2 The second MAC. |
| 360 | * @return True if they are on the same virtual network, |
| 361 | * false otherwise. |
| 362 | */ |
| 363 | protected boolean oneSameNetwork(MACAddress m1, MACAddress m2) { |
| 364 | String net1 = macToGuid.get(m1); |
| 365 | String net2 = macToGuid.get(m2); |
| 366 | if (net1 == null) return false; |
| 367 | if (net2 == null) return false; |
| 368 | return net1.equals(net2); |
| 369 | } |
| 370 | |
| 371 | /** |
| 372 | * Checks to see if an Ethernet frame is a DHCP packet. |
| 373 | * @param frame The Ethernet frame. |
| 374 | * @return True if it is a DHCP frame, false otherwise. |
| 375 | */ |
| 376 | protected boolean isDhcpPacket(Ethernet frame) { |
| 377 | IPacket payload = frame.getPayload(); // IP |
| 378 | if (payload == null) return false; |
| 379 | IPacket p2 = payload.getPayload(); // TCP or UDP |
| 380 | if (p2 == null) return false; |
| 381 | IPacket p3 = p2.getPayload(); // Application |
| 382 | if ((p3 != null) && (p3 instanceof DHCP)) return true; |
| 383 | return false; |
| 384 | } |
| 385 | |
| 386 | /** |
| 387 | * Processes an OFPacketIn message and decides if the OFPacketIn should be dropped |
| 388 | * or the processing should continue. |
| 389 | * @param sw The switch the PacketIn came from. |
| 390 | * @param msg The OFPacketIn message from the switch. |
| 391 | * @param cntx The FloodlightContext for this message. |
| 392 | * @return Command.CONTINUE if processing should be continued, Command.STOP otherwise. |
| 393 | */ |
| 394 | protected Command processPacketIn(IOFSwitch sw, OFPacketIn msg, FloodlightContext cntx) { |
| 395 | Ethernet eth = IFloodlightProviderService.bcStore.get(cntx, |
| 396 | IFloodlightProviderService.CONTEXT_PI_PAYLOAD); |
| 397 | Command ret = Command.STOP; |
| 398 | String srcNetwork = macToGuid.get(eth.getSourceMAC()); |
| 399 | // If the host is on an unknown network we deny it. |
| 400 | // We make exceptions for ARP and DHCP. |
| 401 | if (eth.isBroadcast() || eth.isMulticast() || isDefaultGateway(eth) || isDhcpPacket(eth)) { |
| 402 | ret = Command.CONTINUE; |
| 403 | } else if (srcNetwork == null) { |
| 404 | log.trace("Blocking traffic from host {} because it is not attached to any network.", |
| 405 | HexString.toHexString(eth.getSourceMACAddress())); |
| 406 | ret = Command.STOP; |
| 407 | } else if (oneSameNetwork(eth.getSourceMAC(), eth.getDestinationMAC())) { |
| 408 | // if they are on the same network continue |
| 409 | ret = Command.CONTINUE; |
| 410 | } |
| 411 | |
| 412 | if (log.isTraceEnabled()) |
| 413 | log.trace("Results for flow between {} and {} is {}", |
| 414 | new Object[] {eth.getSourceMAC(), eth.getDestinationMAC(), ret}); |
| 415 | /* |
| 416 | * TODO - figure out how to still detect gateways while using |
| 417 | * drop mods |
| 418 | if (ret == Command.STOP) { |
| 419 | if (!(eth.getPayload() instanceof ARP)) |
| 420 | doDropFlow(sw, msg, cntx); |
| 421 | } |
| 422 | */ |
| 423 | return ret; |
| 424 | } |
| 425 | |
| 426 | /** |
| 427 | * Writes a FlowMod to a switch that inserts a drop flow. |
| 428 | * @param sw The switch to write the FlowMod to. |
| 429 | * @param pi The corresponding OFPacketIn. Used to create the OFMatch structure. |
| 430 | * @param cntx The FloodlightContext that gets passed to the switch. |
| 431 | */ |
| 432 | protected void doDropFlow(IOFSwitch sw, OFPacketIn pi, FloodlightContext cntx) { |
| 433 | if (log.isTraceEnabled()) { |
| 434 | log.trace("doDropFlow pi={} srcSwitch={}", |
| 435 | new Object[] { pi, sw }); |
| 436 | } |
| 437 | |
| 438 | if (sw == null) { |
| 439 | log.warn("Switch is null, not installing drop flowmod for PacketIn {}", pi); |
| 440 | return; |
| 441 | } |
| 442 | |
| 443 | // Create flow-mod based on packet-in and src-switch |
| 444 | OFFlowMod fm = |
| 445 | (OFFlowMod) floodlightProvider.getOFMessageFactory().getMessage(OFType.FLOW_MOD); |
| 446 | OFMatch match = new OFMatch(); |
| 447 | match.loadFromPacket(pi.getPacketData(), pi.getInPort()); |
| 448 | List<OFAction> actions = new ArrayList<OFAction>(); // no actions = drop |
| 449 | long cookie = AppCookie.makeCookie(APP_ID, 0); |
| 450 | fm.setCookie(cookie) |
| 451 | .setIdleTimeout(ForwardingBase.FLOWMOD_DEFAULT_IDLE_TIMEOUT) |
| 452 | .setHardTimeout(ForwardingBase.FLOWMOD_DEFAULT_HARD_TIMEOUT) |
| 453 | .setBufferId(OFPacketOut.BUFFER_ID_NONE) |
| 454 | .setMatch(match) |
| 455 | .setActions(actions) |
| 456 | .setLengthU(OFFlowMod.MINIMUM_LENGTH); |
| 457 | fm.setFlags(OFFlowMod.OFPFF_SEND_FLOW_REM); |
| 458 | try { |
| 459 | if (log.isTraceEnabled()) { |
| 460 | log.trace("write drop flow-mod srcSwitch={} match={} " + |
| 461 | "pi={} flow-mod={}", |
| 462 | new Object[] {sw, match, pi, fm}); |
| 463 | } |
| 464 | sw.write(fm, cntx); |
| 465 | } catch (IOException e) { |
| 466 | log.error("Failure writing drop flow mod", e); |
| 467 | } |
| 468 | return; |
| 469 | } |
| 470 | |
| 471 | // IDeviceListener |
| 472 | |
| 473 | @Override |
| 474 | public void deviceAdded(IDevice device) { |
| 475 | if (device.getIPv4Addresses() == null) return; |
| 476 | for (Integer i : device.getIPv4Addresses()) { |
| 477 | if (gatewayToGuid.containsKey(i)) { |
| 478 | MACAddress mac = MACAddress.valueOf(device.getMACAddress()); |
| 479 | if (log.isDebugEnabled()) |
| 480 | log.debug("Adding MAC {} with IP {} a a gateway", |
| 481 | HexString.toHexString(mac.toBytes()), |
| 482 | IPv4.fromIPv4Address(i)); |
| 483 | macToGateway.put(mac, i); |
| 484 | } |
| 485 | } |
| 486 | } |
| 487 | |
| 488 | @Override |
| 489 | public void deviceRemoved(IDevice device) { |
| 490 | // if device is a gateway remove |
| 491 | MACAddress mac = MACAddress.valueOf(device.getMACAddress()); |
| 492 | if (macToGateway.containsKey(mac)) { |
| 493 | if (log.isDebugEnabled()) |
| 494 | log.debug("Removing MAC {} as a gateway", |
| 495 | HexString.toHexString(mac.toBytes())); |
| 496 | macToGateway.remove(mac); |
| 497 | } |
| 498 | } |
| 499 | |
| 500 | @Override |
| 501 | public void deviceIPV4AddrChanged(IDevice device) { |
| 502 | // add or remove entry as gateway |
| 503 | deviceAdded(device); |
| 504 | } |
| 505 | |
| 506 | @Override |
| 507 | public void deviceMoved(IDevice device) { |
| 508 | // ignore |
| 509 | } |
| 510 | |
| 511 | @Override |
| 512 | public void deviceVlanChanged(IDevice device) { |
| 513 | // ignore |
| 514 | } |
| 515 | |
| 516 | @Override |
| 517 | public Collection <VirtualNetwork> listNetworks() { |
| 518 | return vNetsByGuid.values(); |
| 519 | |
| 520 | } |
| 521 | } |