| package net.onrc.onos.ofcontroller.bgproute; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.net.InetAddress; |
| import java.net.UnknownHostException; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.Executors; |
| 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.devicemanager.IDeviceService; |
| import net.floodlightcontroller.packet.Ethernet; |
| import net.floodlightcontroller.packet.IPv4; |
| import net.floodlightcontroller.restserver.IRestApiService; |
| import net.floodlightcontroller.routing.Link; |
| import net.floodlightcontroller.topology.ITopologyListener; |
| import net.floodlightcontroller.topology.ITopologyService; |
| import net.onrc.onos.ofcontroller.core.INetMapTopologyService.ITopoLinkService; |
| import net.onrc.onos.ofcontroller.core.INetMapTopologyService.ITopoRouteService; |
| import net.onrc.onos.ofcontroller.core.internal.TopoLinkServiceImpl; |
| import net.onrc.onos.ofcontroller.linkdiscovery.ILinkDiscovery; |
| import net.onrc.onos.ofcontroller.linkdiscovery.ILinkDiscovery.LDUpdate; |
| import net.onrc.onos.ofcontroller.proxyarp.ProxyArpManager; |
| import net.onrc.onos.ofcontroller.routing.TopoRouteService; |
| import net.onrc.onos.ofcontroller.util.DataPath; |
| import net.onrc.onos.ofcontroller.util.Dpid; |
| import net.onrc.onos.ofcontroller.util.FlowEntry; |
| import net.onrc.onos.ofcontroller.util.Port; |
| import net.onrc.onos.ofcontroller.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.OFMessage; |
| import org.openflow.protocol.OFPacketOut; |
| import org.openflow.protocol.OFPort; |
| import org.openflow.protocol.OFType; |
| import org.openflow.protocol.action.OFAction; |
| import org.openflow.protocol.action.OFActionDataLayerDestination; |
| import org.openflow.protocol.action.OFActionOutput; |
| import org.openflow.util.HexString; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class BgpRoute implements IFloodlightModule, IBgpRouteService, |
| ITopologyListener, IOFSwitchListener { |
| |
| protected static Logger log = LoggerFactory.getLogger(BgpRoute.class); |
| |
| protected IFloodlightProviderService floodlightProvider; |
| protected ITopologyService topology; |
| protected ITopoRouteService topoRouteService; |
| protected IDeviceService devices; |
| protected IRestApiService restApi; |
| |
| protected ProxyArpManager proxyArp; |
| |
| protected static Ptree ptree; |
| protected String bgpdRestIp; |
| protected String routerId; |
| protected 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. |
| protected final long APP_COOKIE = 0xa0000000000000L; |
| //Cookie for flows that do L2 forwarding within SDN domain to egress routers |
| protected final long L2_FWD_COOKIE = APP_COOKIE + 1; |
| //Cookie for flows in ingress switches that rewrite the MAC address |
| protected final long MAC_RW_COOKIE = APP_COOKIE + 2; |
| //Cookie for flows that setup BGP paths |
| protected 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 |
| protected final short SDNIP_PRIORITY = 10; |
| |
| protected final short BGP_PORT = 179; |
| |
| protected final int TOPO_DETECTION_WAIT = 2; //seconds |
| |
| //Configuration stuff |
| protected List<String> switches; |
| protected Map<String, Interface> interfaces; |
| protected Map<InetAddress, BgpPeer> bgpPeers; |
| protected SwitchPort bgpdAttachmentPoint; |
| |
| //True when all switches have connected |
| protected volatile boolean switchesConnected = false; |
| //True when we have a full mesh of shortest paths between gateways |
| protected volatile boolean topologyReady = false; |
| |
| protected ArrayList<LDUpdate> linkUpdates; |
| protected SingletonTask topologyChangeDetectorTask; |
| |
| protected 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 |
| ITopoLinkService topoLinkService = new TopoLinkServiceImpl(); |
| |
| List<Link> activeLinks = topoLinkService.getActiveLinks(); |
| for (Link l : activeLinks){ |
| //log.debug("active link: {}", l); |
| } |
| |
| 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)){ |
| log.debug("Not found: {}", l); |
| it.remove(); |
| } |
| } |
| } |
| |
| if (linkUpdates.isEmpty()){ |
| //All updates have been seen in network map. |
| //We can check if topology is ready |
| log.debug("No know 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- size {}", linkUpdates.size()); |
| topologyChangeDetectorTask.reschedule(TOPO_DETECTION_WAIT, TimeUnit.SECONDS); |
| } |
| } |
| } |
| |
| private void readGatewaysConfiguration(String gatewaysFilename){ |
| File gatewaysFile = new File(gatewaysFilename); |
| 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())); |
| |
| } 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); |
| } |
| } |
| |
| @Override |
| public Collection<Class<? extends IFloodlightService>> getModuleServices() { |
| Collection<Class<? extends IFloodlightService>> l |
| = new ArrayList<Class<? extends IFloodlightService>>(); |
| l.add(IBgpRouteService.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); |
| 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(ITopologyService.class); |
| l.add(IDeviceService.class); |
| l.add(IRestApiService.class); |
| return l; |
| } |
| |
| @Override |
| public void init(FloodlightModuleContext context) |
| throws FloodlightModuleException { |
| |
| ptree = new Ptree(32); |
| |
| // Register floodlight provider and REST handler. |
| floodlightProvider = context.getServiceImpl(IFloodlightProviderService.class); |
| topology = context.getServiceImpl(ITopologyService.class); |
| devices = context.getServiceImpl(IDeviceService.class); |
| restApi = context.getServiceImpl(IRestApiService.class); |
| |
| //TODO We'll initialise this here for now, but it should really be done as |
| //part of the controller core |
| proxyArp = new ProxyArpManager(floodlightProvider, topology, devices); |
| |
| linkUpdates = new ArrayList<LDUpdate>(); |
| ScheduledExecutorService executor = Executors.newScheduledThreadPool(1); |
| topologyChangeDetectorTask = new SingletonTask(executor, new TopologyChangeDetector()); |
| |
| topoRouteService = new TopoRouteService(""); |
| |
| //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); |
| |
| readGatewaysConfiguration(configFilename); |
| // Test. |
| //test(); |
| } |
| |
| public Ptree getPtree() { |
| return ptree; |
| } |
| |
| public void clearPtree() { |
| //ptree = null; |
| ptree = new Ptree(32); |
| } |
| |
| public String getBGPdRestIp() { |
| return bgpdRestIp; |
| } |
| |
| public String getRouterId() { |
| return routerId; |
| } |
| |
| // Return nexthop address as byte array. |
| public Rib lookupRib(byte[] dest) { |
| if (ptree == null) { |
| log.debug("lookupRib: ptree null"); |
| return null; |
| } |
| |
| PtreeNode node = ptree.match(dest, 32); |
| if (node == null) { |
| log.debug("lookupRib: ptree node null"); |
| return null; |
| } |
| |
| if (node.rib == null) { |
| log.debug("lookupRib: ptree rib null"); |
| return null; |
| } |
| |
| ptree.delReference(node); |
| |
| return node.rib; |
| } |
| |
| //TODO looks like this should be a unit test |
| @SuppressWarnings("unused") |
| private void test() throws UnknownHostException { |
| System.out.println("Here it is"); |
| Prefix p = new Prefix("128.0.0.0", 8); |
| Prefix q = new Prefix("8.0.0.0", 8); |
| Prefix r = new Prefix("10.0.0.0", 24); |
| Prefix a = new Prefix("10.0.0.1", 32); |
| |
| ptree.acquire(p.getAddress(), p.getPrefixLength()); |
| ptree.acquire(q.getAddress(), q.getPrefixLength()); |
| ptree.acquire(r.getAddress(), r.getPrefixLength()); |
| |
| System.out.println("Traverse start"); |
| for (PtreeNode node = ptree.begin(); node != null; node = ptree.next(node)) { |
| Prefix p_result = new Prefix(node.key, node.keyBits); |
| } |
| |
| PtreeNode n = ptree.match(a.getAddress(), a.getPrefixLength()); |
| if (n != null) { |
| System.out.println("Matched prefix for 10.0.0.1:"); |
| Prefix x = new Prefix(n.key, n.keyBits); |
| ptree.delReference(n); |
| } |
| |
| n = ptree.lookup(p.getAddress(), p.getPrefixLength()); |
| if (n != null) { |
| ptree.delReference(n); |
| ptree.delReference(n); |
| } |
| System.out.println("Traverse start"); |
| for (PtreeNode node = ptree.begin(); node != null; node = ptree.next(node)) { |
| Prefix p_result = new Prefix(node.key, node.keyBits); |
| } |
| |
| n = ptree.lookup(q.getAddress(), q.getPrefixLength()); |
| if (n != null) { |
| ptree.delReference(n); |
| ptree.delReference(n); |
| } |
| System.out.println("Traverse start"); |
| for (PtreeNode node = ptree.begin(); node != null; node = ptree.next(node)) { |
| Prefix p_result = new Prefix(node.key, node.keyBits); |
| } |
| |
| n = ptree.lookup(r.getAddress(), r.getPrefixLength()); |
| if (n != null) { |
| ptree.delReference(n); |
| ptree.delReference(n); |
| } |
| System.out.println("Traverse start"); |
| for (PtreeNode node = ptree.begin(); node != null; node = ptree.next(node)) { |
| Prefix p_result = new Prefix(node.key, node.keyBits); |
| } |
| |
| } |
| |
| private String getPrefixFromPtree(PtreeNode node){ |
| InetAddress address = null; |
| try { |
| address = InetAddress.getByAddress(node.key); |
| } catch (UnknownHostException e1) { |
| //Should never happen is the reverse conversion has already been done |
| log.error("Malformed IP address"); |
| return ""; |
| } |
| return address.toString() + "/" + node.rib.masklen; |
| } |
| |
| 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 rib_json_array = jsonObj.getJSONArray("rib"); |
| String router_id = jsonObj.getString("router-id"); |
| |
| int size = rib_json_array.size(); |
| |
| log.info("Retrived RIB of {} entries from BGPd", size); |
| |
| for (int j = 0; j < size; j++) { |
| JSONObject second_json_object = rib_json_array.getJSONObject(j); |
| String prefix = second_json_object.getString("prefix"); |
| String nexthop = second_json_object.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 (UnknownHostException e1) { |
| log.warn("Wrong prefix format in RIB JSON: {}", prefix1); |
| continue; |
| } |
| |
| PtreeNode node = ptree.acquire(p.getAddress(), p.getPrefixLength()); |
| Rib rib = new Rib(router_id, nexthop, p.getPrefixLength()); |
| |
| if (node.rib != null) { |
| node.rib = null; |
| ptree.delReference(node); |
| } |
| |
| node.rib = rib; |
| |
| prefixAdded(node); |
| } |
| } |
| |
| public void prefixAdded(PtreeNode node) { |
| if (!topologyReady){ |
| return; |
| } |
| |
| String prefix = getPrefixFromPtree(node); |
| |
| log.debug("New prefix {} added, next hop {}, routerId {}", |
| new Object[] {prefix, node.rib.nextHop.toString(), |
| node.rib.routerId.getHostAddress()}); |
| |
| //TODO this is wrong, we shouldn't be dealing with BGP peers here. |
| //We need to figure out where the device is attached and what its |
| //mac address is by learning. |
| //The next hop is not necessarily the peer, and the peer's attachment |
| //point is not necessarily the next hop's attachment point. |
| BgpPeer peer = bgpPeers.get(node.rib.nextHop); |
| |
| if (peer == null){ |
| //TODO local router isn't in peers list so this will get thrown |
| //Need to work out what to do about local prefixes with next hop 0.0.0.0. |
| |
| //The other scenario is this is a route server route. In that |
| //case the next hop is not in our configuration |
| log.error("Couldn't find next hop router in router {} in config" |
| , node.rib.nextHop.toString()); |
| return; //just quit out here? This is probably a configuration error |
| } |
| |
| Interface peerInterface = interfaces.get(peer.getInterfaceName()); |
| |
| //Add a flow to rewrite mac for this prefix to all border switches |
| for (Interface srcInterface : interfaces.values()) { |
| if (srcInterface == peerInterface) { |
| //Don't push a flow for the switch where this peer is attached |
| continue; |
| } |
| |
| DataPath shortestPath = topoRouteService.getShortestPath( |
| srcInterface.getSwitchPort(), |
| peerInterface.getSwitchPort()); |
| |
| if (shortestPath == null){ |
| log.debug("Shortest path between {} and {} not found", |
| srcInterface.getSwitchPort(), |
| peerInterface.getSwitchPort()); |
| return; // just quit here? |
| } |
| |
| //TODO check the shortest path against the cached version we |
| //calculated before. If they don't match up that's a problem |
| |
| //Set up the flow mod |
| OFFlowMod fm = |
| (OFFlowMod) floodlightProvider.getOFMessageFactory() |
| .getMessage(OFType.FLOW_MOD); |
| |
| fm.setIdleTimeout((short)0) |
| .setHardTimeout((short)0) |
| .setBufferId(OFPacketOut.BUFFER_ID_NONE) |
| .setCookie(MAC_RW_COOKIE) |
| .setCommand(OFFlowMod.OFPFC_ADD) |
| .setPriority(SDNIP_PRIORITY) |
| .setLengthU(OFFlowMod.MINIMUM_LENGTH |
| + OFActionDataLayerDestination.MINIMUM_LENGTH |
| + OFActionOutput.MINIMUM_LENGTH); |
| |
| OFMatch match = new OFMatch(); |
| match.setDataLayerType(Ethernet.TYPE_IPv4); |
| match.setWildcards(match.getWildcards() & ~OFMatch.OFPFW_DL_TYPE); |
| |
| //match.setDataLayerSource(ingressRouter.getRouterMac().toBytes()); |
| //match.setDataLayerSource(peer.getMacAddress().toBytes()); |
| //match.setWildcards(match.getWildcards() & ~OFMatch.OFPFW_DL_SRC); |
| |
| InetAddress address = null; |
| try { |
| address = InetAddress.getByAddress(node.key); |
| } catch (UnknownHostException e1) { |
| //Should never happen is the reverse conversion has already been done |
| log.error("Malformed IP address"); |
| return; |
| } |
| |
| match.setFromCIDR(address.getHostAddress() + "/" + node.rib.masklen, OFMatch.STR_NW_DST); |
| fm.setMatch(match); |
| |
| //Set up MAC rewrite action |
| OFActionDataLayerDestination macRewriteAction = new OFActionDataLayerDestination(); |
| //TODO use ARP module rather than configured mac addresses |
| //TODO the peer's mac address is not necessarily the next hop's... |
| macRewriteAction.setDataLayerAddress(peer.getMacAddress().toBytes()); |
| |
| //Set up output action |
| OFActionOutput outputAction = new OFActionOutput(); |
| outputAction.setMaxLength((short)0xffff); |
| |
| Port outputPort = shortestPath.flowEntries().get(0).outPort(); |
| outputAction.setPort(outputPort.value()); |
| |
| List<OFAction> actions = new ArrayList<OFAction>(); |
| actions.add(macRewriteAction); |
| actions.add(outputAction); |
| fm.setActions(actions); |
| |
| //Write to switch |
| IOFSwitch sw = floodlightProvider.getSwitches() |
| .get(srcInterface.getDpid()); |
| |
| if (sw == null){ |
| log.warn("Switch not found when pushing flow mod"); |
| continue; |
| } |
| |
| List<OFMessage> msglist = new ArrayList<OFMessage>(); |
| msglist.add(fm); |
| try { |
| sw.write(msglist, null); |
| sw.flush(); |
| } catch (IOException e) { |
| log.error("Failure writing flow mod", e); |
| } |
| } |
| } |
| |
| //TODO this is largely untested |
| public void prefixDeleted(PtreeNode node) { |
| if (!topologyReady) { |
| return; |
| } |
| |
| String prefix = getPrefixFromPtree(node); |
| |
| log.debug("Prefix {} deleted, next hop {}", |
| prefix, node.rib.nextHop.toString()); |
| |
| //Remove MAC rewriting flows from other border switches |
| BgpPeer peer = bgpPeers.get(node.rib.nextHop); |
| if (peer == null){ |
| //either a router server route or local route. Can't handle right now |
| return; |
| } |
| |
| Interface peerInterface = interfaces.get(peer.getInterfaceName()); |
| |
| for (Interface srcInterface : interfaces.values()) { |
| if (srcInterface == peerInterface) { |
| continue; |
| } |
| |
| //Set up the flow mod |
| OFFlowMod fm = |
| (OFFlowMod) floodlightProvider.getOFMessageFactory() |
| .getMessage(OFType.FLOW_MOD); |
| |
| fm.setIdleTimeout((short)0) |
| .setHardTimeout((short)0) |
| .setBufferId(OFPacketOut.BUFFER_ID_NONE) |
| .setCookie(MAC_RW_COOKIE) |
| .setCommand(OFFlowMod.OFPFC_DELETE) |
| .setOutPort(OFPort.OFPP_NONE) |
| .setPriority(SDNIP_PRIORITY) |
| .setLengthU(OFFlowMod.MINIMUM_LENGTH); |
| //+ OFActionDataLayerDestination.MINIMUM_LENGTH |
| //+ OFActionOutput.MINIMUM_LENGTH); |
| |
| OFMatch match = new OFMatch(); |
| match.setDataLayerType(Ethernet.TYPE_IPv4); |
| match.setWildcards(match.getWildcards() & ~OFMatch.OFPFW_DL_TYPE); |
| |
| //match.setDataLayerSource(ingressRouter.getRouterMac().toBytes()); |
| //match.setDataLayerSource(peer.getMacAddress().toBytes()); |
| //match.setWildcards(match.getWildcards() & ~OFMatch.OFPFW_DL_SRC); |
| |
| InetAddress address = null; |
| try { |
| address = InetAddress.getByAddress(node.key); |
| } catch (UnknownHostException e1) { |
| //Should never happen is the reverse conversion has already been done |
| log.error("Malformed IP address"); |
| return; |
| } |
| |
| match.setFromCIDR(address.getHostAddress() + "/" + node.rib.masklen, OFMatch.STR_NW_DST); |
| fm.setMatch(match); |
| |
| //Write to switch |
| IOFSwitch sw = floodlightProvider.getSwitches() |
| .get(srcInterface.getDpid()); |
| |
| if (sw == null){ |
| log.warn("Switch not found when pushing flow mod"); |
| continue; |
| } |
| |
| List<OFMessage> msglist = new ArrayList<OFMessage>(); |
| msglist.add(fm); |
| try { |
| sw.write(msglist, null); |
| sw.flush(); |
| } catch (IOException e) { |
| log.error("Failure writing flow mod", e); |
| } |
| } |
| } |
| |
| /* |
| * 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()); |
| //for (Map.Entry<String, Interface> intfEntry : interfaces.entrySet()) { |
| for (Interface srcInterface : interfaces.values()) { |
| //Interface srcInterface = intfEntry.getValue(); |
| //if (peer.getInterfaceName().equals(intfEntry.getKey())){ |
| if (peer.getInterfaceName().equals(srcInterface.getName())){ |
| continue; |
| } |
| |
| DataPath shortestPath = topoRouteService.getShortestPath( |
| srcInterface.getSwitchPort(), peerInterface.getSwitchPort()); |
| |
| if (shortestPath == null){ |
| log.debug("Shortest path between {} and {} not found", |
| srcInterface.getSwitchPort(), peerInterface.getSwitchPort()); |
| return; // just quit here? |
| } |
| |
| //install flows |
| installPath(shortestPath.flowEntries(), peer); |
| } |
| } |
| } |
| |
| private void installPath(List<FlowEntry> flowEntries, BgpPeer peer){ |
| //Set up the flow mod |
| OFFlowMod fm = |
| (OFFlowMod) floodlightProvider.getOFMessageFactory() |
| .getMessage(OFType.FLOW_MOD); |
| |
| OFActionOutput action = new OFActionOutput(); |
| action.setMaxLength((short)0xffff); |
| List<OFAction> actions = new ArrayList<OFAction>(); |
| actions.add(action); |
| |
| fm.setIdleTimeout((short)0) |
| .setHardTimeout((short)0) |
| .setBufferId(OFPacketOut.BUFFER_ID_NONE) |
| .setCookie(L2_FWD_COOKIE) |
| .setCommand(OFFlowMod.OFPFC_ADD) |
| .setActions(actions) |
| .setLengthU(OFFlowMod.MINIMUM_LENGTH+OFActionOutput.MINIMUM_LENGTH); |
| |
| //Don't push the first flow entry. We need to push entries in the |
| //first switch based on IP prefix which we don't know yet. |
| for (int i = 1; i < flowEntries.size(); i++){ |
| FlowEntry flowEntry = flowEntries.get(i); |
| |
| OFMatch match = new OFMatch(); |
| //TODO Again using MAC address from configuration |
| match.setDataLayerDestination(peer.getMacAddress().toBytes()); |
| match.setWildcards(match.getWildcards() & ~OFMatch.OFPFW_DL_DST); |
| ((OFActionOutput) fm.getActions().get(0)).setPort(flowEntry.outPort().value()); |
| |
| fm.setMatch(match); |
| |
| IOFSwitch sw = floodlightProvider.getSwitches().get(flowEntry.dpid().value()); |
| |
| if (sw == null){ |
| log.warn("Switch not found when pushing flow mod"); |
| continue; |
| } |
| |
| List<OFMessage> msglist = new ArrayList<OFMessage>(); |
| msglist.add(fm); |
| try { |
| sw.write(msglist, null); |
| sw.flush(); |
| } catch (IOException e) { |
| log.error("Failure writing flow mod", e); |
| } |
| |
| try { |
| fm = fm.clone(); |
| } catch (CloneNotSupportedException e1) { |
| log.error("Failure cloning flow mod", e1); |
| } |
| } |
| } |
| |
| private void setupBgpPaths(){ |
| for (BgpPeer bgpPeer : bgpPeers.values()){ |
| Interface peerInterface = interfaces.get(bgpPeer.getInterfaceName()); |
| |
| DataPath path = topoRouteService.getShortestPath( |
| peerInterface.getSwitchPort(), bgpdAttachmentPoint); |
| |
| if (path == null){ |
| log.debug("Unable to compute path for BGP traffic for {}", |
| bgpPeer.getIpAddress()); |
| continue; |
| } |
| |
| //Set up the flow mod |
| OFFlowMod fm = |
| (OFFlowMod) floodlightProvider.getOFMessageFactory() |
| .getMessage(OFType.FLOW_MOD); |
| |
| OFActionOutput action = new OFActionOutput(); |
| action.setMaxLength((short)0xffff); |
| List<OFAction> actions = new ArrayList<OFAction>(); |
| actions.add(action); |
| |
| fm.setIdleTimeout((short)0) |
| .setHardTimeout((short)0) |
| .setBufferId(OFPacketOut.BUFFER_ID_NONE) |
| .setCookie(BGP_COOKIE) |
| .setCommand(OFFlowMod.OFPFC_ADD) |
| .setPriority(SDNIP_PRIORITY) |
| .setActions(actions) |
| .setLengthU(OFFlowMod.MINIMUM_LENGTH+OFActionOutput.MINIMUM_LENGTH); |
| |
| //Forward = gateway -> bgpd, reverse = bgpd -> gateway |
| OFMatch forwardMatchSrc = new OFMatch(); |
| |
| |
| String interfaceCidrAddress = peerInterface.getIpAddress().getHostAddress() |
| + "/32"; |
| String peerCidrAddress = bgpPeer.getIpAddress().getHostAddress() |
| + "/32"; |
| |
| //Common match fields |
| forwardMatchSrc.setDataLayerType(Ethernet.TYPE_IPv4); |
| //forwardMatch.setWildcards(forwardMatch.getWildcards() & ~OFMatch.OFPFW_DL_TYPE); |
| forwardMatchSrc.setNetworkProtocol(IPv4.PROTOCOL_TCP); |
| forwardMatchSrc.setTransportDestination(BGP_PORT); |
| forwardMatchSrc.setWildcards(forwardMatchSrc.getWildcards() & ~OFMatch.OFPFW_IN_PORT |
| & ~OFMatch.OFPFW_DL_TYPE & ~OFMatch.OFPFW_NW_PROTO); |
| |
| |
| OFMatch reverseMatchSrc = forwardMatchSrc.clone(); |
| |
| forwardMatchSrc.setFromCIDR(peerCidrAddress, OFMatch.STR_NW_SRC); |
| forwardMatchSrc.setFromCIDR(interfaceCidrAddress, OFMatch.STR_NW_DST); |
| |
| OFMatch forwardMatchDst = forwardMatchSrc.clone(); |
| |
| forwardMatchSrc.setTransportSource(BGP_PORT); |
| forwardMatchSrc.setWildcards(forwardMatchSrc.getWildcards() & ~OFMatch.OFPFW_TP_SRC); |
| forwardMatchDst.setTransportDestination(BGP_PORT); |
| forwardMatchDst.setWildcards(forwardMatchDst.getWildcards() & ~OFMatch.OFPFW_TP_DST); |
| |
| reverseMatchSrc.setFromCIDR(interfaceCidrAddress, OFMatch.STR_NW_SRC); |
| reverseMatchSrc.setFromCIDR(peerCidrAddress, OFMatch.STR_NW_DST); |
| |
| OFMatch reverseMatchDst = reverseMatchSrc.clone(); |
| |
| reverseMatchSrc.setTransportSource(BGP_PORT); |
| reverseMatchSrc.setWildcards(forwardMatchSrc.getWildcards() & ~OFMatch.OFPFW_TP_SRC); |
| reverseMatchDst.setTransportDestination(BGP_PORT); |
| reverseMatchDst.setWildcards(forwardMatchDst.getWildcards() & ~OFMatch.OFPFW_TP_DST); |
| |
| fm.setMatch(forwardMatchSrc); |
| |
| for (FlowEntry flowEntry : path.flowEntries()){ |
| OFFlowMod forwardFlowModSrc, forwardFlowModDst; |
| OFFlowMod reverseFlowModSrc, reverseFlowModDst; |
| try { |
| forwardFlowModSrc = fm.clone(); |
| forwardFlowModDst = fm.clone(); |
| reverseFlowModSrc = fm.clone(); |
| reverseFlowModDst = fm.clone(); |
| } catch (CloneNotSupportedException e) { |
| log.warn("Clone failed", e); |
| continue; |
| } |
| |
| forwardMatchSrc.setInputPort(flowEntry.inPort().value()); |
| forwardFlowModSrc.setMatch(forwardMatchSrc); |
| ((OFActionOutput)forwardFlowModSrc.getActions().get(0)) |
| .setPort(flowEntry.outPort().value()); |
| |
| forwardMatchDst.setInputPort(flowEntry.inPort().value()); |
| forwardFlowModDst.setMatch(forwardMatchDst); |
| ((OFActionOutput)forwardFlowModDst.getActions().get(0)) |
| .setPort(flowEntry.outPort().value()); |
| |
| reverseMatchSrc.setInputPort(flowEntry.outPort().value()); |
| reverseFlowModSrc.setMatch(reverseMatchSrc); |
| ((OFActionOutput)reverseFlowModSrc.getActions().get(0)) |
| .setPort(flowEntry.inPort().value()); |
| |
| reverseMatchDst.setInputPort(flowEntry.outPort().value()); |
| reverseFlowModDst.setMatch(reverseMatchDst); |
| ((OFActionOutput)reverseFlowModDst.getActions().get(0)) |
| .setPort(flowEntry.inPort().value()); |
| |
| IOFSwitch sw = floodlightProvider.getSwitches().get(flowEntry.dpid().value()); |
| |
| //Hopefully the switch is there |
| List<OFMessage> msgList = new ArrayList<OFMessage>(2); |
| msgList.add(forwardFlowModSrc); |
| msgList.add(forwardFlowModDst); |
| msgList.add(reverseFlowModSrc); |
| msgList.add(reverseFlowModDst); |
| |
| try { |
| sw.write(msgList, null); |
| sw.flush(); |
| } catch (IOException e) { |
| log.error("Failure writing flow mod", e); |
| } |
| } |
| } |
| } |
| |
| private void beginRouting(){ |
| log.debug("Topology is now ready, beginning routing function"); |
| setupBgpPaths(); |
| setupFullMesh(); |
| |
| //Traverse ptree and create flows for all routes |
| for (PtreeNode node = ptree.begin(); node != null; node = ptree.next(node)){ |
| if (node.rib != null){ |
| prefixAdded(node); |
| } |
| } |
| } |
| |
| private void checkSwitchesConnected(){ |
| for (String dpid : switches){ |
| if (floodlightProvider.getSwitches().get(HexString.toLong(dpid)) == null){ |
| 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 == srcInterface) { |
| continue; |
| } |
| |
| DataPath shortestPath = topoRouteService.getShortestPath( |
| 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(){ |
| log.debug("In checkStatus, swC {}, toRe {}", switchesConnected, topologyReady); |
| |
| if (!switchesConnected){ |
| checkSwitchesConnected(); |
| } |
| boolean oldTopologyReadyStatus = topologyReady; |
| if (switchesConnected && !topologyReady){ |
| checkTopologyReady(); |
| } |
| if (!oldTopologyReadyStatus && topologyReady){ |
| beginRouting(); |
| } |
| } |
| |
| @Override |
| public void startUp(FloodlightModuleContext context) { |
| restApi.addRestletRoutable(new BgpRouteWebRoutable()); |
| floodlightProvider.addOFSwitchListener(this); |
| topology.addListener(this); |
| |
| floodlightProvider.addOFMessageListener(OFType.PACKET_IN, proxyArp); |
| |
| //Retrieve the RIB from BGPd during startup |
| retrieveRib(); |
| } |
| |
| @Override |
| public void topologyChanged() { |
| //There seems to be more topology events than there should be. Lots of link |
| //updated, port up and switch updated on what should be a fairly static topology |
| |
| boolean refreshNeeded = false; |
| for (LDUpdate ldu : topology.getLastLinkUpdates()){ |
| if (!ldu.getOperation().equals(ILinkDiscovery.UpdateOperation.LINK_UPDATED)){ |
| //We don't need to recalculate anything for just link updates |
| //They happen way too frequently (may be a bug in our link discovery) |
| refreshNeeded = true; |
| } |
| |
| log.debug("Topo change {}", ldu.getOperation()); |
| |
| if (ldu.getOperation().equals(ILinkDiscovery.UpdateOperation.LINK_ADDED)){ |
| synchronized (linkUpdates) { |
| linkUpdates.add(ldu); |
| } |
| } |
| } |
| |
| if (refreshNeeded){ |
| topologyChangeDetectorTask.reschedule(TOPO_DETECTION_WAIT, TimeUnit.SECONDS); |
| } |
| } |
| |
| //TODO determine whether we need to listen for switch joins |
| @Override |
| public void addedSwitch(IOFSwitch sw) { |
| //checkStatus(); |
| } |
| |
| @Override |
| public void removedSwitch(IOFSwitch sw) { |
| // TODO Auto-generated method stub |
| } |
| |
| @Override |
| public void switchPortChanged(Long switchId) {} |
| |
| @Override |
| public String getName() { |
| return "BgpRoute"; |
| } |
| } |