| package net.onrc.onos.apps.bgproute; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.net.InetAddress; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.BlockingQueue; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.LinkedBlockingQueue; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.TimeUnit; |
| |
| import net.floodlightcontroller.core.IFloodlightProviderService; |
| import net.floodlightcontroller.core.IOFSwitch; |
| import net.floodlightcontroller.core.IOFSwitchListener; |
| import net.floodlightcontroller.core.module.FloodlightModuleContext; |
| import net.floodlightcontroller.core.module.FloodlightModuleException; |
| import net.floodlightcontroller.core.module.IFloodlightModule; |
| import net.floodlightcontroller.core.module.IFloodlightService; |
| import net.floodlightcontroller.core.util.SingletonTask; |
| import net.floodlightcontroller.restserver.IRestApiService; |
| import net.floodlightcontroller.util.MACAddress; |
| import net.onrc.onos.apps.bgproute.RibUpdate.Operation; |
| import net.onrc.onos.apps.proxyarp.IArpRequester; |
| import net.onrc.onos.apps.proxyarp.IProxyArpService; |
| import net.onrc.onos.core.linkdiscovery.ILinkDiscovery.LDUpdate; |
| import net.onrc.onos.core.linkdiscovery.ILinkDiscoveryService; |
| import net.onrc.onos.core.main.config.IConfigInfoService; |
| import net.onrc.onos.core.packet.Ethernet; |
| import net.onrc.onos.core.packet.IPv4; |
| import net.onrc.onos.core.util.CallerId; |
| import net.onrc.onos.core.util.DataPath; |
| import net.onrc.onos.core.util.Dpid; |
| import net.onrc.onos.core.util.FlowEntryAction; |
| import net.onrc.onos.core.util.FlowEntryActions; |
| import net.onrc.onos.core.util.FlowEntryMatch; |
| import net.onrc.onos.core.util.FlowId; |
| import net.onrc.onos.core.util.FlowPath; |
| import net.onrc.onos.core.util.FlowPathFlags; |
| import net.onrc.onos.core.util.FlowPathType; |
| import net.onrc.onos.core.util.FlowPathUserState; |
| import net.onrc.onos.core.util.IPv4Net; |
| import net.onrc.onos.core.util.Port; |
| import net.onrc.onos.core.util.SwitchPort; |
| import net.sf.json.JSONArray; |
| import net.sf.json.JSONObject; |
| import net.sf.json.JSONSerializer; |
| |
| import org.codehaus.jackson.JsonParseException; |
| import org.codehaus.jackson.map.JsonMappingException; |
| import org.codehaus.jackson.map.ObjectMapper; |
| import org.openflow.protocol.OFFlowMod; |
| import org.openflow.protocol.OFMatch; |
| import org.openflow.protocol.OFPacketOut; |
| import org.openflow.protocol.OFPort; |
| import org.openflow.protocol.action.OFAction; |
| import org.openflow.protocol.action.OFActionOutput; |
| import org.openflow.util.HexString; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.collect.HashMultimap; |
| import com.google.common.collect.Multimap; |
| import com.google.common.collect.Multimaps; |
| import com.google.common.collect.SetMultimap; |
| import com.google.common.net.InetAddresses; |
| import com.google.common.util.concurrent.ThreadFactoryBuilder; |
| |
| public class BgpRoute implements IFloodlightModule, IBgpRouteService, |
| IArpRequester, |
| IOFSwitchListener, IConfigInfoService { |
| |
| private final static Logger log = LoggerFactory.getLogger(BgpRoute.class); |
| |
| private IFloodlightProviderService floodlightProvider; |
| private ILinkDiscoveryService linkDiscoveryService; |
| private IRestApiService restApi; |
| private IProxyArpService proxyArp; |
| |
| private IPatriciaTrie<RibEntry> ptree; |
| private IPatriciaTrie<Interface> interfacePtrie; |
| private BlockingQueue<RibUpdate> ribUpdates; |
| |
| private String bgpdRestIp; |
| private String routerId; |
| private String configFilename = "config.json"; |
| |
| //We need to identify our flows somehow. But like it says in LearningSwitch.java, |
| //the controller/OS should hand out cookie IDs to prevent conflicts. |
| private static final long APP_COOKIE = 0xa0000000000000L; |
| //Cookie for flows that do L2 forwarding within SDN domain to egress routers |
| private static final long L2_FWD_COOKIE = APP_COOKIE + 1; |
| //Cookie for flows in ingress switches that rewrite the MAC address |
| private static final long MAC_RW_COOKIE = APP_COOKIE + 2; |
| //Cookie for flows that setup BGP paths |
| private static final long BGP_COOKIE = APP_COOKIE + 3; |
| //Forwarding uses priority 0, and the mac rewrite entries in ingress switches |
| //need to be higher priority than this otherwise the rewrite may not get done |
| private static final short SDNIP_PRIORITY = 10; |
| private static final short ARP_PRIORITY = 20; |
| |
| private static final short BGP_PORT = 179; |
| |
| private static final int TOPO_DETECTION_WAIT = 2; //seconds |
| |
| //Configuration stuff |
| private List<String> switches; |
| private Map<String, Interface> interfaces; |
| private Map<InetAddress, BgpPeer> bgpPeers; |
| private SwitchPort bgpdAttachmentPoint; |
| private MACAddress bgpdMacAddress; |
| private short vlan; |
| |
| //True when all switches have connected |
| private volatile boolean switchesConnected = false; |
| //True when we have a full mesh of shortest paths between gateways |
| private volatile boolean topologyReady = false; |
| |
| private ArrayList<LDUpdate> linkUpdates; |
| private SingletonTask topologyChangeDetectorTask; |
| |
| private SetMultimap<InetAddress, RibUpdate> prefixesWaitingOnArp; |
| |
| private Map<InetAddress, Path> pathsWaitingOnArp; |
| |
| private ExecutorService bgpUpdatesExecutor; |
| |
| private Map<InetAddress, Path> pushedPaths; |
| private Map<Prefix, Path> prefixToPath; |
| // private Multimap<Prefix, PushedFlowMod> pushedFlows; |
| private Multimap<Prefix, FlowId> pushedFlowIds; |
| |
| private FlowCache flowCache; |
| |
| // TODO: Fix for the new Topology Network Graph |
| // private volatile Topology topology = null; |
| |
| private class TopologyChangeDetector implements Runnable { |
| @Override |
| public void run() { |
| log.debug("Running topology change detection task"); |
| synchronized (linkUpdates) { |
| //This is the model the REST API uses to retrieve network graph info |
| // TODO: Fix the code below after topoLinkService was removed |
| /* |
| ITopoLinkService topoLinkService = new TopoLinkServiceImpl(); |
| |
| List<Link> activeLinks = topoLinkService.getActiveLinks(); |
| |
| Iterator<LDUpdate> it = linkUpdates.iterator(); |
| while (it.hasNext()){ |
| LDUpdate ldu = it.next(); |
| Link l = new Link(ldu.getSrc(), ldu.getSrcPort(), |
| ldu.getDst(), ldu.getDstPort()); |
| |
| if (activeLinks.contains(l)){ |
| it.remove(); |
| } |
| } |
| */ |
| } |
| |
| if (!topologyReady) { |
| if (linkUpdates.isEmpty()) { |
| //All updates have been seen in network map. |
| //We can check if topology is ready |
| log.debug("No known changes outstanding. Checking topology now"); |
| checkStatus(); |
| } else { |
| //We know of some link updates that haven't propagated to the database yet |
| log.debug("Some changes not found in network map - {} links missing", linkUpdates.size()); |
| topologyChangeDetectorTask.reschedule(TOPO_DETECTION_WAIT, TimeUnit.SECONDS); |
| } |
| } |
| } |
| } |
| |
| private void readConfiguration(String configFilename) { |
| File gatewaysFile = new File(configFilename); |
| ObjectMapper mapper = new ObjectMapper(); |
| |
| try { |
| Configuration config = mapper.readValue(gatewaysFile, Configuration.class); |
| |
| switches = config.getSwitches(); |
| interfaces = new HashMap<String, Interface>(); |
| for (Interface intf : config.getInterfaces()) { |
| interfaces.put(intf.getName(), intf); |
| } |
| bgpPeers = new HashMap<InetAddress, BgpPeer>(); |
| for (BgpPeer peer : config.getPeers()) { |
| bgpPeers.put(peer.getIpAddress(), peer); |
| } |
| |
| bgpdAttachmentPoint = new SwitchPort( |
| new Dpid(config.getBgpdAttachmentDpid()), |
| new Port(config.getBgpdAttachmentPort())); |
| |
| bgpdMacAddress = config.getBgpdMacAddress(); |
| vlan = config.getVlan(); |
| } catch (JsonParseException e) { |
| log.error("Error in JSON file", e); |
| System.exit(1); |
| } catch (JsonMappingException e) { |
| log.error("Error in JSON file", e); |
| System.exit(1); |
| } catch (IOException e) { |
| log.error("Error reading JSON file", e); |
| System.exit(1); |
| } |
| |
| //Populate the interface Patricia Trie |
| for (Interface intf : interfaces.values()) { |
| Prefix prefix = new Prefix(intf.getIpAddress().getAddress(), intf.getPrefixLength()); |
| interfacePtrie.put(prefix, intf); |
| } |
| } |
| |
| @Override |
| public Collection<Class<? extends IFloodlightService>> getModuleServices() { |
| Collection<Class<? extends IFloodlightService>> l |
| = new ArrayList<Class<? extends IFloodlightService>>(); |
| l.add(IBgpRouteService.class); |
| l.add(IConfigInfoService.class); |
| return l; |
| } |
| |
| @Override |
| public Map<Class<? extends IFloodlightService>, IFloodlightService> getServiceImpls() { |
| Map<Class<? extends IFloodlightService>, IFloodlightService> m |
| = new HashMap<Class<? extends IFloodlightService>, IFloodlightService>(); |
| m.put(IBgpRouteService.class, this); |
| m.put(IConfigInfoService.class, this); |
| return m; |
| } |
| |
| @Override |
| public Collection<Class<? extends IFloodlightService>> getModuleDependencies() { |
| Collection<Class<? extends IFloodlightService>> l |
| = new ArrayList<Class<? extends IFloodlightService>>(); |
| l.add(IFloodlightProviderService.class); |
| l.add(IRestApiService.class); |
| return l; |
| } |
| |
| @Override |
| public void init(FloodlightModuleContext context) |
| throws FloodlightModuleException { |
| |
| ptree = new PatriciaTrie<RibEntry>(32); |
| interfacePtrie = new PatriciaTrie<Interface>(32); |
| |
| ribUpdates = new LinkedBlockingQueue<RibUpdate>(); |
| |
| // Register floodlight provider and REST handler. |
| floodlightProvider = context.getServiceImpl(IFloodlightProviderService.class); |
| linkDiscoveryService = context.getServiceImpl(ILinkDiscoveryService.class); |
| restApi = context.getServiceImpl(IRestApiService.class); |
| proxyArp = context.getServiceImpl(IProxyArpService.class); |
| |
| linkUpdates = new ArrayList<LDUpdate>(); |
| ScheduledExecutorService executor = Executors.newScheduledThreadPool(1); |
| topologyChangeDetectorTask = new SingletonTask(executor, new TopologyChangeDetector()); |
| |
| pathsWaitingOnArp = new HashMap<InetAddress, Path>(); |
| prefixesWaitingOnArp = Multimaps.synchronizedSetMultimap( |
| HashMultimap.<InetAddress, RibUpdate>create()); |
| |
| pushedPaths = new HashMap<InetAddress, Path>(); |
| prefixToPath = new HashMap<Prefix, Path>(); |
| // pushedFlows = HashMultimap.<Prefix, PushedFlowMod>create(); |
| pushedFlowIds = HashMultimap.<Prefix, FlowId>create(); |
| |
| flowCache = new FlowCache(floodlightProvider); |
| |
| bgpUpdatesExecutor = Executors.newSingleThreadExecutor( |
| new ThreadFactoryBuilder().setNameFormat("bgp-updates-%d").build()); |
| |
| //Read in config values |
| bgpdRestIp = context.getConfigParams(this).get("BgpdRestIp"); |
| if (bgpdRestIp == null) { |
| log.error("BgpdRestIp property not found in config file"); |
| System.exit(1); |
| } else { |
| log.info("BgpdRestIp set to {}", bgpdRestIp); |
| } |
| |
| routerId = context.getConfigParams(this).get("RouterId"); |
| if (routerId == null) { |
| log.error("RouterId property not found in config file"); |
| System.exit(1); |
| } else { |
| log.info("RouterId set to {}", routerId); |
| } |
| |
| String configFilenameParameter = context.getConfigParams(this).get("configfile"); |
| if (configFilenameParameter != null) { |
| configFilename = configFilenameParameter; |
| } |
| log.debug("Config file set to {}", configFilename); |
| |
| readConfiguration(configFilename); |
| } |
| |
| @Override |
| public void startUp(FloodlightModuleContext context) { |
| restApi.addRestletRoutable(new BgpRouteWebRoutable()); |
| floodlightProvider.addOFSwitchListener(this); |
| |
| //Retrieve the RIB from BGPd during startup |
| retrieveRib(); |
| } |
| |
| @Override |
| public IPatriciaTrie<RibEntry> getPtree() { |
| return ptree; |
| } |
| |
| @Override |
| public void clearPtree() { |
| ptree = new PatriciaTrie<RibEntry>(32); |
| } |
| |
| @Override |
| public String getBGPdRestIp() { |
| return bgpdRestIp; |
| } |
| |
| @Override |
| public String getRouterId() { |
| return routerId; |
| } |
| |
| private void retrieveRib() { |
| String url = "http://" + bgpdRestIp + "/wm/bgp/" + routerId; |
| String response = RestClient.get(url); |
| |
| if (response.equals("")) { |
| return; |
| } |
| |
| response = response.replaceAll("\"", "'"); |
| JSONObject jsonObj = (JSONObject) JSONSerializer.toJSON(response); |
| JSONArray ribJsonArray = jsonObj.getJSONArray("rib"); |
| String routerId = jsonObj.getString("router-id"); |
| |
| int size = ribJsonArray.size(); |
| |
| log.info("Retrived RIB of {} entries from BGPd", size); |
| |
| for (int j = 0; j < size; j++) { |
| JSONObject secondJsonObject = ribJsonArray.getJSONObject(j); |
| String prefix = secondJsonObject.getString("prefix"); |
| String nexthop = secondJsonObject.getString("nexthop"); |
| |
| //insert each rib entry into the local rib; |
| String[] substring = prefix.split("/"); |
| String prefix1 = substring[0]; |
| String mask1 = substring[1]; |
| |
| Prefix p; |
| try { |
| p = new Prefix(prefix1, Integer.valueOf(mask1)); |
| } catch (NumberFormatException e) { |
| log.warn("Wrong mask format in RIB JSON: {}", mask1); |
| continue; |
| } catch (IllegalArgumentException e1) { |
| log.warn("Wrong prefix format in RIB JSON: {}", prefix1); |
| continue; |
| } |
| |
| RibEntry rib = new RibEntry(routerId, nexthop); |
| |
| try { |
| ribUpdates.put(new RibUpdate(Operation.UPDATE, p, rib)); |
| } catch (InterruptedException e) { |
| log.debug("Interrupted while pushing onto update queue"); |
| } |
| } |
| } |
| |
| @Override |
| public void newRibUpdate(RibUpdate update) { |
| try { |
| ribUpdates.put(update); |
| } catch (InterruptedException e) { |
| log.debug("Interrupted while putting on ribUpdates queue", e); |
| Thread.currentThread().interrupt(); |
| } |
| } |
| |
| public synchronized void processRibAdd(RibUpdate update) { |
| Prefix prefix = update.getPrefix(); |
| |
| log.debug("Processing prefix add {}", prefix); |
| |
| RibEntry rib = ptree.put(prefix, update.getRibEntry()); |
| |
| if (rib != null && !rib.equals(update.getRibEntry())) { |
| //There was an existing nexthop for this prefix. This update supersedes that, |
| //so we need to remove the old flows for this prefix from the switches |
| _processDeletePrefix(prefix, rib); |
| } |
| |
| if (update.getRibEntry().getNextHop().equals( |
| InetAddresses.forString("0.0.0.0"))) { |
| //Route originated by SDN domain |
| //We don't handle these at the moment |
| log.debug("Own route {} to {}", prefix, |
| update.getRibEntry().getNextHop().getHostAddress()); |
| return; |
| } |
| |
| _processRibAdd(update); |
| } |
| |
| private void _processRibAdd(RibUpdate update) { |
| Prefix prefix = update.getPrefix(); |
| RibEntry rib = update.getRibEntry(); |
| |
| InetAddress dstIpAddress = rib.getNextHop(); |
| MACAddress nextHopMacAddress = null; |
| |
| // See if we know the MAC address of the next hop |
| // TODO if we do not treat the next hop as a device in the future, we need to update this |
| // TODO: Fix the code below after deviceStorage was removed |
| /* |
| IDeviceObject nextHopDevice = |
| deviceStorage.getDeviceByIP(InetAddresses.coerceToInteger(dstIpAddress)); |
| |
| if (nextHopDevice == null){ |
| log.debug("NextHopDevice for IP: {} is null", dstIpAddress); |
| prefixesWaitingOnArp.put(dstIpAddress, |
| new RibUpdate(Operation.UPDATE, prefix, rib)); |
| proxyArp.sendArpRequest(dstIpAddress, this, true); |
| return; |
| |
| } |
| nextHopMacAddress = MACAddress.valueOf(nextHopDevice.getMACAddress()); |
| */ |
| |
| // Find the attachment point (egress interface) of the next hop |
| Interface egressInterface = null; |
| if (bgpPeers.containsKey(dstIpAddress)) { |
| //Route to a peer |
| log.debug("Route to peer {}", dstIpAddress); |
| BgpPeer peer = bgpPeers.get(dstIpAddress); |
| egressInterface = interfaces.get(peer.getInterfaceName()); |
| } else { |
| //Route to non-peer |
| log.debug("Route to non-peer {}", dstIpAddress); |
| egressInterface = interfacePtrie.match( |
| new Prefix(dstIpAddress.getAddress(), 32)); |
| if (egressInterface == null) { |
| log.warn("No outgoing interface found for {}", dstIpAddress.getHostAddress()); |
| return; |
| } |
| } |
| |
| if (nextHopMacAddress == null) { |
| prefixesWaitingOnArp.put(dstIpAddress, |
| new RibUpdate(Operation.UPDATE, prefix, rib)); |
| proxyArp.sendArpRequest(dstIpAddress, this, true); |
| return; |
| } else { |
| if (!bgpPeers.containsKey(dstIpAddress)) { |
| //If the prefix is for a non-peer we need to ensure there's a path, |
| //and push one if there isn't. |
| Path path = pushedPaths.get(dstIpAddress); |
| if (path == null) { |
| path = new Path(egressInterface, dstIpAddress); |
| calculateAndPushPath(path, nextHopMacAddress); |
| pushedPaths.put(dstIpAddress, path); |
| } |
| |
| path.incrementUsers(); |
| prefixToPath.put(prefix, path); |
| } |
| |
| //For all prefixes we need to add the first-hop mac-rewriting flows |
| addPrefixFlows(prefix, egressInterface, nextHopMacAddress); |
| } |
| } |
| |
| /** |
| * Add a flow to match dst-IP prefix and rewrite MAC for one IP prefix |
| * to all other border switches |
| */ |
| private void addPrefixFlows(Prefix prefix, Interface egressInterface, |
| MACAddress nextHopMacAddress) { |
| log.debug("Adding flows for prefix {}, next hop mac {}", |
| prefix, nextHopMacAddress); |
| |
| FlowPath flowPath = new FlowPath(); |
| flowPath.setInstallerId(new CallerId("SDNIP")); |
| |
| // Set flowPath FlowPathType and FlowPathUserState |
| flowPath.setFlowPathType(FlowPathType.FP_TYPE_SHORTEST_PATH); |
| flowPath.setFlowPathUserState(FlowPathUserState.FP_USER_ADD); |
| |
| // Insert dst-ip prefix based forwarding and MAC rewrite flow entry |
| // only to the first-host switches |
| FlowPathFlags flowPathFlags = new FlowPathFlags(); |
| flowPathFlags.setFlags(FlowPathFlags.KEEP_ONLY_FIRST_HOP_ENTRY); |
| flowPath.setFlowPathFlags(flowPathFlags); |
| |
| // Create the DataPath object: dstSwitchPort |
| SwitchPort dstPort = new SwitchPort(); |
| dstPort.setDpid(new Dpid(egressInterface.getDpid())); |
| dstPort.setPort(new Port(egressInterface.getPort())); |
| |
| // We only need one flow mod per switch, so pick one interface on each switch |
| Map<Long, Interface> srcInterfaces = new HashMap<Long, Interface>(); |
| for (Interface intf : interfaces.values()) { |
| if (!srcInterfaces.containsKey(intf.getDpid()) |
| && !intf.equals(egressInterface)) { |
| srcInterfaces.put(intf.getDpid(), intf); |
| } |
| } |
| for (Interface srcInterface : srcInterfaces.values()) { |
| |
| if (egressInterface.equals(srcInterface)) { |
| continue; |
| } |
| |
| // Create flowPath FlowId |
| flowPath.setFlowId(new FlowId()); |
| |
| // Create DataPath object: srcSwitchPort |
| SwitchPort srcPort = new SwitchPort(); |
| srcPort.setDpid(new Dpid(srcInterface.getDpid())); |
| srcPort.setPort(new Port(srcInterface.getPort())); |
| |
| DataPath dataPath = new DataPath(); |
| dataPath.setSrcPort(srcPort); |
| dataPath.setDstPort(dstPort); |
| flowPath.setDataPath(dataPath); |
| |
| // Create flow path matching condition(s): IPv4 Prefix |
| FlowEntryMatch flowEntryMatch = new FlowEntryMatch(); |
| flowEntryMatch.enableEthernetFrameType(Ethernet.TYPE_IPv4); |
| IPv4Net dstIPv4Net = new IPv4Net(prefix.toString()); |
| flowEntryMatch.enableDstIPv4Net(dstIPv4Net); |
| flowPath.setFlowEntryMatch(flowEntryMatch); |
| |
| /* |
| * Create the Flow Entry Action(s): dst-MAC rewrite action |
| */ |
| FlowEntryActions flowEntryActions = new FlowEntryActions(); |
| FlowEntryAction flowEntryAction1 = new FlowEntryAction(); |
| flowEntryAction1.setActionSetEthernetDstAddr(nextHopMacAddress); |
| // flowEntryAction1.actionSetEthernetDstAddr(nextHopMacAddress); |
| flowEntryActions.addAction(flowEntryAction1); |
| flowPath.setFlowEntryActions(flowEntryActions); |
| |
| // Flow Path installation, only to first hop switches |
| // TODO: Add the flow by using the new Path Intent framework |
| /* |
| if (flowManagerService.addFlow(flowPath) == null) { |
| log.error("Failed to install flow path to the first hop for " + |
| "prefix: {}, nextHopMacAddress: {}", prefix.getAddress(), |
| nextHopMacAddress); |
| } |
| else { |
| log.debug("Successfully installed flow path to the first hop " + |
| "for prefix: {}, nextHopMacAddress: {}", prefix.getAddress(), |
| nextHopMacAddress); |
| |
| pushedFlowIds.put(prefix, flowPath.flowId()); |
| } |
| */ |
| } |
| } |
| |
| public synchronized void processRibDelete(RibUpdate update) { |
| Prefix prefix = update.getPrefix(); |
| |
| if (ptree.remove(prefix, update.getRibEntry())) { |
| /* |
| * Only delete flows if an entry was actually removed from the trie. |
| * If no entry was removed, the <prefix, nexthop> wasn't there so |
| * it's probably already been removed and we don't need to do anything |
| */ |
| _processDeletePrefix(prefix, update.getRibEntry()); |
| } |
| } |
| |
| private void _processDeletePrefix(Prefix prefix, RibEntry ribEntry) { |
| deletePrefixFlows(prefix); |
| |
| log.debug("Deleting {} to {}", prefix, ribEntry.getNextHop()); |
| |
| if (!bgpPeers.containsKey(ribEntry.getNextHop())) { |
| log.debug("Getting path for route with non-peer nexthop"); |
| Path path = prefixToPath.remove(prefix); |
| |
| if (path != null) { |
| //path could be null if we added to the Ptree but didn't push |
| //flows yet because we were waiting to resolve ARP |
| |
| path.decrementUsers(); |
| if (path.getUsers() <= 0 && !path.isPermanent()) { |
| deletePath(path); |
| pushedPaths.remove(path.getDstIpAddress()); |
| } |
| } |
| } |
| } |
| |
| // TODO have not tested this module |
| private void deletePrefixFlows(Prefix prefix) { |
| log.debug("Deleting flows for prefix {}", prefix); |
| |
| Collection<FlowId> flowIds = pushedFlowIds.removeAll(prefix); |
| for (FlowId flowId : flowIds) { |
| // TODO: Delete the flow by using the new Path Intent framework |
| /* |
| if (log.isTraceEnabled()) { |
| //Trace the flow status by flowPath in the switch before deleting it |
| log.trace("Pushing a DELETE flow mod to flowPath : {}", |
| flowManagerService.getFlow(flowId).toString()); |
| } |
| |
| if( flowManagerService.deleteFlow(flowId)) |
| { |
| log.debug("Successfully deleted FlowId: {}",flowId); |
| } |
| else |
| { |
| log.debug("Failed to delete FlowId: {}",flowId); |
| } |
| */ |
| } |
| } |
| |
| // TODO need to record the path and then delete here |
| private void deletePath(Path path) { |
| log.debug("Deleting flows for path to {}", |
| path.getDstIpAddress().getHostAddress()); |
| |
| // TODO need update |
| /*for (PushedFlowMod pfm : path.getFlowMods()) { |
| if (log.isTraceEnabled()) { |
| log.trace("Pushing a DELETE flow mod to {}, dst MAC {}", |
| new Object[] {HexString.toHexString(pfm.getDpid()), |
| HexString.toHexString(pfm.getFlowMod().getMatch().getDataLayerDestination()) |
| }); |
| } |
| |
| sendDeleteFlowMod(pfm.getFlowMod(), pfm.getDpid()); |
| }*/ |
| } |
| |
| |
| //TODO test next-hop changes |
| //TODO check delete/add synchronization |
| |
| /** |
| * On startup, we need to calculate a full mesh of paths between all gateway |
| * switches |
| */ |
| private void setupFullMesh() { |
| //For each border router, calculate and install a path from every other |
| //border switch to said border router. However, don't install the entry |
| //in to the first hop switch, as we need to install an entry to rewrite |
| //for each prefix received. This will be done later when prefixes have |
| //actually been received. |
| |
| for (BgpPeer peer : bgpPeers.values()) { |
| Interface peerInterface = interfaces.get(peer.getInterfaceName()); |
| |
| //We know there's not already a Path here pushed, because this is |
| //called before all other routing |
| Path path = new Path(peerInterface, peer.getIpAddress()); |
| path.setPermanent(); |
| |
| //See if we know the MAC address of the peer. If not we can't |
| //do anything until we learn it |
| // TODO: Fix the code below after deviceStorage was removed |
| MACAddress macAddress = null; |
| /* |
| IDeviceObject nextHopDevice = |
| deviceStorage.getDeviceByIP(InetAddresses.coerceToInteger(peer.getIpAddress())); |
| |
| if(nextHopDevice == null){ |
| log.debug("There is no DeviceObject for {}", peer.getIpAddress().getHostAddress()); |
| //Put in the pending paths list first |
| pathsWaitingOnArp.put(peer.getIpAddress(), path); |
| proxyArp.sendArpRequest(peer.getIpAddress(), this, true); |
| continue; |
| } |
| |
| macAddress = MACAddress.valueOf(nextHopDevice.getMACAddress()); |
| */ |
| |
| if (macAddress == null) { |
| log.debug("Don't know MAC for {}", peer.getIpAddress().getHostAddress()); |
| //Put in the pending paths list first |
| pathsWaitingOnArp.put(peer.getIpAddress(), path); |
| proxyArp.sendArpRequest(peer.getIpAddress(), this, true); |
| continue; |
| } |
| |
| //If we know the MAC, lets go ahead and push the paths to this peer |
| calculateAndPushPath(path, macAddress); |
| } |
| } |
| |
| private void calculateAndPushPath(Path path, MACAddress dstMacAddress) { |
| Interface dstInterface = path.getDstInterface(); |
| |
| log.debug("Setting up path to {}, {}", path.getDstIpAddress().getHostAddress(), |
| dstMacAddress); |
| |
| FlowPath flowPath = new FlowPath(); |
| |
| flowPath.setInstallerId(new CallerId("SDNIP")); |
| |
| // Set flowPath FlowPathType and FlowPathUserState |
| flowPath.setFlowPathType(FlowPathType.FP_TYPE_SHORTEST_PATH); |
| flowPath.setFlowPathUserState(FlowPathUserState.FP_USER_ADD); |
| |
| // Insert the dest-mac based forwarding flow entry to the non-first-hop switches |
| FlowPathFlags flowPathFlags = new FlowPathFlags(); |
| flowPathFlags.setFlags(FlowPathFlags.DISCARD_FIRST_HOP_ENTRY); |
| flowPath.setFlowPathFlags(flowPathFlags); |
| |
| // Create the DataPath object: dstSwitchPort |
| SwitchPort dstPort = new SwitchPort(); |
| dstPort.setDpid(new Dpid(dstInterface.getDpid())); |
| dstPort.setPort(new Port(dstInterface.getPort())); |
| |
| for (Interface srcInterface : interfaces.values()) { |
| |
| if (dstInterface.equals(srcInterface)) { |
| continue; |
| } |
| |
| // Create flowPath FlowId |
| flowPath.setFlowId(new FlowId()); |
| |
| // Create the DataPath object: srcSwitchPort |
| SwitchPort srcPort = new SwitchPort(); |
| srcPort.setDpid(new Dpid(srcInterface.getDpid())); |
| srcPort.setPort(new Port(srcInterface.getPort())); |
| |
| DataPath dataPath = new DataPath(); |
| dataPath.setSrcPort(srcPort); |
| dataPath.setDstPort(dstPort); |
| flowPath.setDataPath(dataPath); |
| |
| // Create the Flow Path Match condition(s) |
| FlowEntryMatch flowEntryMatch = new FlowEntryMatch(); |
| flowEntryMatch.enableEthernetFrameType(Ethernet.TYPE_IPv4); |
| flowEntryMatch.enableDstMac(dstMacAddress); |
| flowPath.setFlowEntryMatch(flowEntryMatch); |
| |
| // NOTE: No need to add ACTION_OUTPUT. It is implied when creating |
| // Shortest Path Flow, and is always the last action for the Flow Entries |
| log.debug("FlowPath of MAC based forwarding: {}", flowPath.toString()); |
| // TODO: Add the flow by using the new Path Intent framework |
| /* |
| if (flowManagerService.addFlow(flowPath) == null) { |
| log.error("Failed to set up MAC based forwarding path to {}, {}", |
| path.getDstIpAddress().getHostAddress(),dstMacAddress); |
| } |
| else { |
| log.debug("Successfully set up MAC based forwarding path to {}, {}", |
| path.getDstIpAddress().getHostAddress(),dstMacAddress); |
| } |
| */ |
| } |
| } |
| |
| /** |
| * Pre-actively install all BGP traffic paths from BGP host attachment point |
| * in SDN network to all the virtual gateways to BGP peers in other networks |
| */ |
| private void setupBgpPaths() { |
| |
| for (BgpPeer bgpPeer : bgpPeers.values()) { |
| |
| FlowPath flowPath = new FlowPath(); |
| flowPath.setInstallerId(new CallerId("SDNIP")); |
| |
| // Set flowPath FlowPathType and FlowPathUserState |
| flowPath.setFlowPathType(FlowPathType.FP_TYPE_SHORTEST_PATH); |
| flowPath.setFlowPathUserState(FlowPathUserState.FP_USER_ADD); |
| |
| // Install flow paths between BGPd and its peers |
| // There is no need to set the FlowPathFlags |
| flowPath.setFlowPathFlags(new FlowPathFlags(0)); |
| |
| Interface peerInterface = interfaces.get(bgpPeer.getInterfaceName()); |
| |
| // Create the Flow Path Match condition(s) |
| FlowEntryMatch flowEntryMatch = new FlowEntryMatch(); |
| flowEntryMatch.enableEthernetFrameType(Ethernet.TYPE_IPv4); |
| |
| // Match both source address and dest address |
| IPv4Net dstIPv4Net = new IPv4Net(bgpPeer.getIpAddress().getHostAddress() + "/32"); |
| flowEntryMatch.enableDstIPv4Net(dstIPv4Net); |
| |
| IPv4Net srcIPv4Net = new IPv4Net(peerInterface.getIpAddress().getHostAddress() + "/32"); |
| flowEntryMatch.enableSrcIPv4Net(srcIPv4Net); |
| |
| // Match TCP protocol |
| flowEntryMatch.enableIpProto(IPv4.PROTOCOL_TCP); |
| |
| // Match destination TCP port |
| flowEntryMatch.enableDstTcpUdpPort(BGP_PORT); |
| flowPath.setFlowEntryMatch(flowEntryMatch); |
| |
| /** |
| * Create the DataPath: BGP -> BGP peer |
| */ |
| // Flow path for src-TCP-port |
| DataPath dataPath = new DataPath(); |
| |
| SwitchPort srcPort = new SwitchPort(); |
| srcPort.setDpid(bgpdAttachmentPoint.dpid()); |
| srcPort.setPort(bgpdAttachmentPoint.port()); |
| dataPath.setSrcPort(srcPort); |
| |
| SwitchPort dstPort = new SwitchPort(); |
| dstPort.setDpid(new Dpid(peerInterface.getDpid())); |
| dstPort.setPort(new Port(peerInterface.getSwitchPort().port())); |
| dataPath.setDstPort(dstPort); |
| |
| flowPath.setDataPath(dataPath); |
| |
| // TODO: Add the flow by using the new Path Intent framework |
| /* |
| if (flowManagerService.addFlow(flowPath) == null) { |
| log.error("Failed to set up path BGP -> peer {}"+"; dst-TCP-port:179", |
| bgpPeer.getIpAddress().getHostAddress()); |
| } |
| else { |
| log.debug("Successfully set up path BGP -> peer {}"+"; dst-TCP-port:179", |
| bgpPeer.getIpAddress().getHostAddress()); |
| } |
| */ |
| |
| // Disable dst-TCP-port, and set src-TCP-port |
| flowEntryMatch.disableDstTcpUdpPort(); |
| flowEntryMatch.enableSrcTcpUdpPort(BGP_PORT); |
| flowPath.setFlowEntryMatch(flowEntryMatch); |
| |
| // Create a new FlowId |
| flowPath.setFlowId(new FlowId()); |
| |
| // TODO: Add the flow by using the new Path Intent framework |
| /* |
| if (flowManagerService.addFlow(flowPath) == null) { |
| log.error("Failed to set up path BGP -> Peer {}" + "; src-TCP-port:179", |
| bgpPeer.getIpAddress().getHostAddress()); |
| } |
| else { |
| log.debug("Successfully set up path BGP -> Peer {}" + "; src-TCP-port:179", |
| bgpPeer.getIpAddress().getHostAddress()); |
| } |
| */ |
| |
| /** |
| * Create the DataPath: BGP <-BGP peer |
| */ |
| // Reversed BGP flow path for src-TCP-port |
| flowPath.setFlowId(new FlowId()); |
| |
| DataPath reverseDataPath = new DataPath(); |
| |
| SwitchPort reverseDstPort = new SwitchPort(); |
| reverseDstPort.setDpid(bgpdAttachmentPoint.dpid()); |
| reverseDstPort.setPort(bgpdAttachmentPoint.port()); |
| reverseDataPath.setDstPort(reverseDstPort); |
| |
| SwitchPort reverseSrcPort = new SwitchPort(); |
| reverseSrcPort.setDpid(new Dpid(peerInterface.getDpid())); |
| reverseSrcPort.setPort(new Port(peerInterface.getSwitchPort().port())); |
| reverseDataPath.setSrcPort(reverseSrcPort); |
| flowPath.setDataPath(reverseDataPath); |
| |
| // reverse the dst IP and src IP addresses |
| flowEntryMatch.enableDstIPv4Net(srcIPv4Net); |
| flowEntryMatch.enableSrcIPv4Net(dstIPv4Net); |
| flowPath.setFlowEntryMatch(flowEntryMatch); |
| |
| log.debug("Reversed BGP FlowPath: {}", flowPath.toString()); |
| |
| // TODO: Add the flow by using the new Path Intent framework |
| /* |
| if (flowManagerService.addFlow(flowPath) == null) { |
| |
| log.error("Failed to set up path BGP <- Peer {}" + "; src-TCP-port:179", |
| bgpPeer.getIpAddress().getHostAddress()); |
| } |
| else { |
| log.debug("Successfully set up path BGP <- Peer {}" + "; src-TCP-port:179", |
| bgpPeer.getIpAddress().getHostAddress()); |
| } |
| */ |
| |
| // Reversed BGP flow path for dst-TCP-port |
| flowPath.setFlowId(new FlowId()); |
| |
| // Disable src-TCP-port, and set the dst-TCP-port |
| flowEntryMatch.disableSrcTcpUdpPort(); |
| flowEntryMatch.enableDstTcpUdpPort(BGP_PORT); |
| flowPath.setFlowEntryMatch(flowEntryMatch); |
| |
| log.debug("Reversed BGP FlowPath: {}", flowPath.toString()); |
| |
| // TODO: Add the flow by using the new Path Intent framework |
| /* |
| if (flowManagerService.addFlow(flowPath) == null) { |
| log.error("Failed to setting up path BGP <- Peer {}" + "; dst-TCP-port:179", |
| bgpPeer.getIpAddress().getHostAddress()); |
| } |
| else { |
| log.debug("Successfully setting up path BGP <- Peer {}" + "; dst-TCP-port:179", |
| bgpPeer.getIpAddress().getHostAddress()); |
| } |
| */ |
| |
| /** |
| * ICMP paths between BGPd and its peers |
| */ |
| //match ICMP protocol BGP <- Peer |
| flowPath.setFlowId(new FlowId()); |
| |
| flowEntryMatch.enableIpProto(IPv4.PROTOCOL_ICMP); |
| flowEntryMatch.disableSrcTcpUdpPort(); |
| flowEntryMatch.disableDstTcpUdpPort(); |
| |
| flowPath.setFlowEntryMatch(flowEntryMatch); |
| |
| flowPath.setDataPath(reverseDataPath); |
| |
| log.debug("Reversed ICMP FlowPath: {}", flowPath.toString()); |
| |
| // TODO: Add the flow by using the new Path Intent framework |
| /* |
| if (flowManagerService.addFlow(flowPath) == null) { |
| |
| log.error("Failed to set up ICMP path BGP <- Peer {}", |
| bgpPeer.getIpAddress().getHostAddress()); |
| } |
| else { |
| log.debug("Successfully set up ICMP path BGP <- Peer {}", |
| bgpPeer.getIpAddress().getHostAddress()); |
| } |
| */ |
| |
| //match ICMP protocol BGP -> Peer |
| flowPath.setFlowId(new FlowId()); |
| |
| flowEntryMatch.enableDstIPv4Net(dstIPv4Net); |
| flowEntryMatch.enableSrcIPv4Net(srcIPv4Net); |
| flowPath.setFlowEntryMatch(flowEntryMatch); |
| |
| flowPath.setDataPath(dataPath); |
| |
| log.debug("ICMP flowPath: {}", flowPath.toString()); |
| |
| // TODO: Add the flow by using the new Path Intent framework |
| /* |
| if (flowManagerService.addFlow(flowPath) == null) { |
| |
| log.error("Failed to set up ICMP path BGP -> Peer {}", |
| bgpPeer.getIpAddress().getHostAddress()); |
| } |
| else { |
| log.debug("Successfully set up ICMP path BGP -> Peer {}", |
| bgpPeer.getIpAddress().getHostAddress()); |
| } |
| */ |
| } |
| } |
| |
| @Override |
| public void arpResponse(InetAddress ipAddress, MACAddress macAddress) { |
| log.debug("Received ARP response: {} => {}", |
| ipAddress.getHostAddress(), macAddress); |
| |
| /* |
| * We synchronize on this to prevent changes to the ptree while we're pushing |
| * flows to the switches. If the ptree changes, the ptree and switches |
| * could get out of sync. |
| */ |
| synchronized (this) { |
| Path path = pathsWaitingOnArp.remove(ipAddress); |
| |
| if (path != null) { |
| log.debug("Pushing path to {} at {} on {}", new Object[]{ |
| path.getDstIpAddress().getHostAddress(), macAddress, |
| path.getDstInterface().getSwitchPort()}); |
| //These paths should always be to BGP peers. Paths to non-peers are |
| //handled once the first prefix is ready to push |
| if (pushedPaths.containsKey(path.getDstIpAddress())) { |
| //A path already got pushed to this endpoint while we were waiting |
| //for ARP. We'll copy over the permanent attribute if it is set on this path. |
| if (path.isPermanent()) { |
| pushedPaths.get(path.getDstIpAddress()).setPermanent(); |
| } |
| } else { |
| calculateAndPushPath(path, macAddress); |
| pushedPaths.put(path.getDstIpAddress(), path); |
| } |
| } |
| |
| Set<RibUpdate> prefixesToPush = prefixesWaitingOnArp.removeAll(ipAddress); |
| |
| for (RibUpdate update : prefixesToPush) { |
| //These will always be adds |
| |
| RibEntry rib = ptree.lookup(update.getPrefix()); |
| if (rib != null && rib.equals(update.getRibEntry())) { |
| log.debug("Pushing prefix {} next hop {}", update.getPrefix(), |
| rib.getNextHop().getHostAddress()); |
| //We only push prefix flows if the prefix is still in the ptree |
| //and the next hop is the same as our update. The prefix could |
| //have been removed while we were waiting for the ARP, or the |
| //next hop could have changed. |
| _processRibAdd(update); |
| } else { |
| log.debug("Received ARP response, but {},{} is no longer in ptree", |
| update.getPrefix(), update.getRibEntry()); |
| } |
| } |
| } |
| } |
| |
| //TODO wait the priority module of the flow Manager |
| private void setupArpFlows() { |
| OFMatch match = new OFMatch(); |
| match.setDataLayerType(Ethernet.TYPE_ARP); |
| match.setWildcards(match.getWildcards() & ~OFMatch.OFPFW_DL_TYPE); |
| |
| OFFlowMod fm = new OFFlowMod(); |
| fm.setMatch(match); |
| |
| OFActionOutput action = new OFActionOutput(); |
| action.setPort(OFPort.OFPP_CONTROLLER.getValue()); |
| action.setMaxLength((short) 0xffff); |
| List<OFAction> actions = new ArrayList<OFAction>(1); |
| actions.add(action); |
| fm.setActions(actions); |
| |
| fm.setIdleTimeout((short) 0) |
| .setHardTimeout((short) 0) |
| .setBufferId(OFPacketOut.BUFFER_ID_NONE) |
| .setCookie(0) |
| .setCommand(OFFlowMod.OFPFC_ADD) |
| .setPriority(ARP_PRIORITY) |
| .setLengthU(OFFlowMod.MINIMUM_LENGTH + OFActionOutput.MINIMUM_LENGTH); |
| |
| for (String strdpid : switches) { |
| flowCache.write(HexString.toLong(strdpid), fm); |
| } |
| } |
| |
| //TODO need update, waiting for the priority feature from flow Manager |
| private void setupDefaultDropFlows() { |
| OFFlowMod fm = new OFFlowMod(); |
| fm.setMatch(new OFMatch()); |
| fm.setActions(new ArrayList<OFAction>()); //No action means drop |
| |
| fm.setIdleTimeout((short) 0) |
| .setHardTimeout((short) 0) |
| .setBufferId(OFPacketOut.BUFFER_ID_NONE) |
| .setCookie(0) |
| .setCommand(OFFlowMod.OFPFC_ADD) |
| .setPriority((short) 0) |
| .setLengthU(OFFlowMod.MINIMUM_LENGTH); |
| |
| OFFlowMod fmLLDP; |
| OFFlowMod fmBDDP; |
| try { |
| fmLLDP = fm.clone(); |
| fmBDDP = fm.clone(); |
| } catch (CloneNotSupportedException e1) { |
| log.error("Error cloning flow mod", e1); |
| return; |
| } |
| |
| OFMatch matchLLDP = new OFMatch(); |
| matchLLDP.setDataLayerType((short) 0x88cc); |
| matchLLDP.setWildcards(matchLLDP.getWildcards() & ~OFMatch.OFPFW_DL_TYPE); |
| fmLLDP.setMatch(matchLLDP); |
| |
| OFMatch matchBDDP = new OFMatch(); |
| matchBDDP.setDataLayerType((short) 0x8942); |
| matchBDDP.setWildcards(matchBDDP.getWildcards() & ~OFMatch.OFPFW_DL_TYPE); |
| fmBDDP.setMatch(matchBDDP); |
| |
| OFActionOutput action = new OFActionOutput(); |
| action.setPort(OFPort.OFPP_CONTROLLER.getValue()); |
| action.setMaxLength((short) 0xffff); |
| List<OFAction> actions = new ArrayList<OFAction>(1); |
| actions.add(action); |
| |
| fmLLDP.setActions(actions); |
| fmBDDP.setActions(actions); |
| |
| fmLLDP.setPriority(ARP_PRIORITY); |
| fmLLDP.setLengthU(OFFlowMod.MINIMUM_LENGTH + OFActionOutput.MINIMUM_LENGTH); |
| fmBDDP.setPriority(ARP_PRIORITY); |
| fmBDDP.setLengthU(OFFlowMod.MINIMUM_LENGTH + OFActionOutput.MINIMUM_LENGTH); |
| |
| List<OFFlowMod> flowModList = new ArrayList<OFFlowMod>(3); |
| flowModList.add(fm); |
| flowModList.add(fmLLDP); |
| flowModList.add(fmBDDP); |
| |
| for (String strdpid : switches) { |
| flowCache.write(HexString.toLong(strdpid), flowModList); |
| } |
| } |
| |
| private void beginRouting() { |
| log.debug("Topology is now ready, beginning routing function"); |
| // TODO: Fix for the new Topology Network Graph |
| // topology = topologyNetService.newDatabaseTopology(); |
| |
| // Wait Pavlin's API. We need the following functions. |
| /*setupArpFlows(); |
| setupDefaultDropFlows();*/ |
| |
| setupBgpPaths(); |
| setupFullMesh(); |
| |
| //Suppress link discovery on external-facing router ports |
| for (Interface intf : interfaces.values()) { |
| linkDiscoveryService.AddToSuppressLLDPs(intf.getDpid(), intf.getPort()); |
| } |
| |
| bgpUpdatesExecutor.execute(new Runnable() { |
| @Override |
| public void run() { |
| doUpdatesThread(); |
| } |
| }); |
| } |
| |
| // Before inserting the paths for BGP traffic, we should check |
| // whether all the switches in the configure file are discovered by onos. |
| private void checkSwitchesConnected() { |
| for (String dpid : switches) { |
| // TODO: Fix the code below after topoSwitchSerice was removed |
| /* |
| Iterator<ISwitchObject> activeSwitches = topoSwitchService. |
| getActiveSwitches().iterator(); |
| while(activeSwitches.hasNext()) |
| { |
| ISwitchObject switchObject = activeSwitches.next(); |
| if (switchObject.getDPID().equals(dpid)) { |
| break; |
| } |
| if(activeSwitches.hasNext() == false) { |
| log.debug("Not all switches are here yet"); |
| return; |
| } |
| } |
| */ |
| } |
| switchesConnected = true; |
| } |
| |
| //Actually we only need to go half way round to verify full mesh connectivity |
| //(n^2)/2 |
| private void checkTopologyReady() { |
| for (Interface dstInterface : interfaces.values()) { |
| for (Interface srcInterface : interfaces.values()) { |
| if (dstInterface.equals(srcInterface)) { |
| continue; |
| } |
| |
| // TODO: Fix for the new Topology Network Graph |
| /* |
| DataPath shortestPath = topologyNetService.getDatabaseShortestPath( |
| srcInterface.getSwitchPort(), dstInterface.getSwitchPort()); |
| |
| if (shortestPath == null){ |
| log.debug("Shortest path between {} and {} not found", |
| srcInterface.getSwitchPort(), dstInterface.getSwitchPort()); |
| return; |
| } |
| */ |
| } |
| } |
| topologyReady = true; |
| } |
| |
| private void checkStatus() { |
| if (!switchesConnected) { |
| checkSwitchesConnected(); |
| } |
| boolean oldTopologyReadyStatus = topologyReady; |
| if (switchesConnected && !topologyReady) { |
| checkTopologyReady(); |
| } |
| if (!oldTopologyReadyStatus && topologyReady) { |
| beginRouting(); |
| } |
| } |
| |
| private void doUpdatesThread() { |
| boolean interrupted = false; |
| try { |
| while (true) { |
| try { |
| RibUpdate update = ribUpdates.take(); |
| switch (update.getOperation()) { |
| case UPDATE: |
| if (validateUpdate(update)) { |
| processRibAdd(update); |
| } else { |
| log.debug("Rib UPDATE out of order: {} via {}", |
| update.getPrefix(), update.getRibEntry().getNextHop()); |
| } |
| break; |
| case DELETE: |
| if (validateUpdate(update)) { |
| processRibDelete(update); |
| } else { |
| log.debug("Rib DELETE out of order: {} via {}", |
| update.getPrefix(), update.getRibEntry().getNextHop()); |
| } |
| break; |
| } |
| } catch (InterruptedException e) { |
| log.debug("Interrupted while taking from updates queue", e); |
| interrupted = true; |
| } catch (Exception e) { |
| log.debug("exception", e); |
| } |
| } |
| } finally { |
| if (interrupted) { |
| Thread.currentThread().interrupt(); |
| } |
| } |
| } |
| |
| private boolean validateUpdate(RibUpdate update) { |
| RibEntry newEntry = update.getRibEntry(); |
| RibEntry oldEntry = ptree.lookup(update.getPrefix()); |
| |
| //If there is no existing entry we must assume this is the most recent |
| //update. However this might not always be the case as we might have a |
| //POST then DELETE reordering. |
| //if (oldEntry == null || !newEntry.getNextHop().equals(oldEntry.getNextHop())) { |
| if (oldEntry == null) { |
| return true; |
| } |
| |
| // This handles the case where routes are gathered in the initial |
| // request because they don't have sequence number info |
| if (newEntry.getSysUpTime() == -1 && newEntry.getSequenceNum() == -1) { |
| return true; |
| } |
| |
| if (newEntry.getSysUpTime() > oldEntry.getSysUpTime()) { |
| return true; |
| } else if (newEntry.getSysUpTime() == oldEntry.getSysUpTime()) { |
| if (newEntry.getSequenceNum() > oldEntry.getSequenceNum()) { |
| return true; |
| } else { |
| return false; |
| } |
| } else { |
| return false; |
| } |
| } |
| |
| // The code below should be reimplemented after removal of Floodlight's |
| // ITopologyService API. It should be implemented on top of network graph |
| // notifications. (It was pretty hacky anyway...) |
| /* |
| @Override |
| public void topologyChanged() { |
| if (topologyReady) { |
| return; |
| } |
| |
| boolean refreshNeeded = false; |
| for (LDUpdate ldu : topologyService.getLastLinkUpdates()){ |
| if (!ldu.getOperation().equals(ILinkDiscovery.UpdateOperation.LINK_UPDATED)){ |
| //We don't need to recalculate anything for just link updates |
| //They happen very frequently |
| refreshNeeded = true; |
| } |
| |
| log.debug("Topo change {}", ldu.getOperation()); |
| |
| if (ldu.getOperation().equals(ILinkDiscovery.UpdateOperation.LINK_ADDED)){ |
| synchronized (linkUpdates) { |
| linkUpdates.add(ldu); |
| } |
| } |
| } |
| |
| if (refreshNeeded && !topologyReady){ |
| topologyChangeDetectorTask.reschedule(TOPO_DETECTION_WAIT, TimeUnit.SECONDS); |
| } |
| } |
| */ |
| |
| @Override |
| public void addedSwitch(IOFSwitch sw) { |
| if (!topologyReady) { |
| sw.clearAllFlowMods(); |
| } |
| |
| flowCache.switchConnected(sw); |
| } |
| |
| @Override |
| public void removedSwitch(IOFSwitch sw) { |
| } |
| |
| @Override |
| public void switchPortChanged(Long switchId) { |
| } |
| |
| @Override |
| public String getName() { |
| return "BgpRoute"; |
| } |
| |
| /* |
| * IConfigInfoService methods |
| */ |
| |
| @Override |
| public boolean isInterfaceAddress(InetAddress address) { |
| Interface intf = interfacePtrie.match(new Prefix(address.getAddress(), 32)); |
| return (intf != null && intf.getIpAddress().equals(address)); |
| } |
| |
| @Override |
| public boolean inConnectedNetwork(InetAddress address) { |
| Interface intf = interfacePtrie.match(new Prefix(address.getAddress(), 32)); |
| return (intf != null && !intf.getIpAddress().equals(address)); |
| } |
| |
| @Override |
| public boolean fromExternalNetwork(long inDpid, short inPort) { |
| for (Interface intf : interfaces.values()) { |
| if (intf.getDpid() == inDpid && intf.getPort() == inPort) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public Interface getOutgoingInterface(InetAddress dstIpAddress) { |
| return interfacePtrie.match(new Prefix(dstIpAddress.getAddress(), 32)); |
| } |
| |
| @Override |
| public boolean hasLayer3Configuration() { |
| return !interfaces.isEmpty(); |
| } |
| |
| @Override |
| public MACAddress getRouterMacAddress() { |
| return bgpdMacAddress; |
| } |
| |
| @Override |
| public short getVlan() { |
| return vlan; |
| } |
| } |