| package net.onrc.onos.ofcontroller.forwarding; |
| |
| import java.util.Iterator; |
| |
| import net.floodlightcontroller.core.FloodlightContext; |
| import net.floodlightcontroller.core.IFloodlightProviderService; |
| import net.floodlightcontroller.core.IOFMessageListener; |
| import net.floodlightcontroller.core.IOFSwitch; |
| import net.floodlightcontroller.packet.Ethernet; |
| import net.floodlightcontroller.util.MACAddress; |
| import net.onrc.onos.datagrid.IDatagridService; |
| import net.onrc.onos.ofcontroller.core.IDeviceStorage; |
| import net.onrc.onos.ofcontroller.core.INetMapTopologyObjects.IDeviceObject; |
| import net.onrc.onos.ofcontroller.core.INetMapTopologyObjects.IPortObject; |
| import net.onrc.onos.ofcontroller.core.INetMapTopologyObjects.ISwitchObject; |
| import net.onrc.onos.ofcontroller.core.internal.DeviceStorageImpl; |
| import net.onrc.onos.ofcontroller.flowmanager.IFlowService; |
| import net.onrc.onos.ofcontroller.topology.TopologyManager; |
| import net.onrc.onos.ofcontroller.util.CallerId; |
| import net.onrc.onos.ofcontroller.util.DataPath; |
| import net.onrc.onos.ofcontroller.util.Dpid; |
| import net.onrc.onos.ofcontroller.util.FlowEntryMatch; |
| import net.onrc.onos.ofcontroller.util.FlowId; |
| import net.onrc.onos.ofcontroller.util.FlowPath; |
| import net.onrc.onos.ofcontroller.util.FlowPathType; |
| import net.onrc.onos.ofcontroller.util.FlowPathUserState; |
| import net.onrc.onos.ofcontroller.util.Port; |
| import net.onrc.onos.ofcontroller.util.SwitchPort; |
| |
| import org.openflow.protocol.OFMessage; |
| import org.openflow.protocol.OFPacketIn; |
| import org.openflow.protocol.OFType; |
| import org.openflow.util.HexString; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class Forwarding implements IOFMessageListener { |
| private final static Logger log = LoggerFactory.getLogger(Forwarding.class); |
| |
| private IFloodlightProviderService floodlightProvider; |
| private IFlowService flowService; |
| private IDatagridService datagridService; |
| |
| private IDeviceStorage deviceStorage; |
| private TopologyManager topologyService; |
| |
| public Forwarding() { |
| |
| } |
| |
| public void init(IFloodlightProviderService floodlightProvider, |
| IFlowService flowService, IDatagridService datagridService) { |
| this.floodlightProvider = floodlightProvider; |
| this.flowService = flowService; |
| this.datagridService = datagridService; |
| |
| floodlightProvider.addOFMessageListener(OFType.PACKET_IN, this); |
| |
| deviceStorage = new DeviceStorageImpl(); |
| deviceStorage.init(""); |
| topologyService = new TopologyManager(); |
| topologyService.init(""); |
| } |
| |
| public void startUp() { |
| // no-op |
| } |
| |
| @Override |
| public String getName() { |
| return "onosforwarding"; |
| } |
| |
| @Override |
| public boolean isCallbackOrderingPrereq(OFType type, String name) { |
| return (type == OFType.PACKET_IN) && |
| (name.equals("devicemanager") || name.equals("proxyarpmanager")); |
| } |
| |
| @Override |
| public boolean isCallbackOrderingPostreq(OFType type, String name) { |
| return false; |
| } |
| |
| @Override |
| public Command receive( |
| IOFSwitch sw, OFMessage msg, FloodlightContext cntx) { |
| |
| if (msg.getType() != OFType.PACKET_IN) { |
| return Command.CONTINUE; |
| } |
| |
| OFPacketIn pi = (OFPacketIn) msg; |
| |
| Ethernet eth = IFloodlightProviderService.bcStore. |
| get(cntx, IFloodlightProviderService.CONTEXT_PI_PAYLOAD); |
| |
| // We only want to handle unicast IPv4 |
| if (eth.isBroadcast() || eth.isMulticast() || |
| eth.getEtherType() != Ethernet.TYPE_IPv4) { |
| return Command.CONTINUE; |
| } |
| |
| handlePacketIn(sw, pi, eth); |
| |
| return Command.STOP; |
| } |
| |
| private void handlePacketIn(IOFSwitch sw, OFPacketIn pi, Ethernet eth) { |
| String destinationMac = HexString.toHexString(eth.getDestinationMACAddress()); |
| |
| IDeviceObject deviceObject = deviceStorage.getDeviceByMac( |
| destinationMac); |
| |
| if (deviceObject == null) { |
| log.debug("No device entry found for {}", destinationMac); |
| return; |
| } |
| |
| Iterator<IPortObject> ports = deviceObject.getAttachedPorts().iterator(); |
| if (!ports.hasNext()) { |
| log.debug("No attachment point found for device {}", destinationMac); |
| return; |
| } |
| IPortObject portObject = ports.next(); |
| short destinationPort = portObject.getNumber(); |
| ISwitchObject switchObject = portObject.getSwitch(); |
| long destinationDpid = HexString.toLong(switchObject.getDPID()); |
| |
| SwitchPort srcSwitchPort = new SwitchPort( |
| new Dpid(sw.getId()), new Port(pi.getInPort())); |
| SwitchPort dstSwitchPort = new SwitchPort( |
| new Dpid(destinationDpid), new Port(destinationPort)); |
| |
| MACAddress srcMacAddress = MACAddress.valueOf(eth.getSourceMACAddress()); |
| MACAddress dstMacAddress = MACAddress.valueOf(eth.getDestinationMACAddress()); |
| |
| if (flowExists(srcSwitchPort, srcMacAddress, |
| dstSwitchPort, dstMacAddress)) { |
| log.debug("Not adding flow because it already exists"); |
| |
| // Don't do anything if the flow already exists |
| return; |
| } |
| |
| log.debug("Adding new flow between {} at {} and {} at {}", |
| new Object[]{srcMacAddress, srcSwitchPort, dstMacAddress, dstSwitchPort}); |
| |
| |
| DataPath dataPath = new DataPath(); |
| dataPath.setSrcPort(srcSwitchPort); |
| dataPath.setDstPort(dstSwitchPort); |
| |
| FlowId flowId = new FlowId(flowService.getNextFlowEntryId()); |
| FlowPath flowPath = new FlowPath(); |
| flowPath.setFlowId(flowId); |
| flowPath.setInstallerId(new CallerId("Forwarding")); |
| flowPath.setFlowPathType(FlowPathType.FP_TYPE_SHORTEST_PATH); |
| flowPath.setFlowPathUserState(FlowPathUserState.FP_USER_ADD); |
| flowPath.setFlowEntryMatch(new FlowEntryMatch()); |
| flowPath.flowEntryMatch().enableSrcMac(srcMacAddress); |
| flowPath.flowEntryMatch().enableDstMac(dstMacAddress); |
| // For now just forward IPv4 packets. This prevents accidentally |
| // other stuff like ARP. |
| flowPath.flowEntryMatch().enableEthernetFrameType(Ethernet.TYPE_IPv4); |
| flowPath.setDataPath(dataPath); |
| |
| flowService.addFlow(flowPath, flowId); |
| } |
| |
| private boolean flowExists(SwitchPort srcPort, MACAddress srcMac, |
| SwitchPort dstPort, MACAddress dstMac) { |
| for (FlowPath flow : datagridService.getAllFlows()) { |
| FlowEntryMatch match = flow.flowEntryMatch(); |
| // TODO implement FlowEntryMatch.equals(); |
| // This is painful to do properly without support in the FlowEntryMatch |
| boolean same = true; |
| if (!match.srcMac().equals(srcMac) || |
| !match.dstMac().equals(dstMac)) { |
| same = false; |
| } |
| if (!flow.dataPath().srcPort().equals(srcPort) || |
| !flow.dataPath().dstPort().equals(dstPort)) { |
| same = false; |
| } |
| |
| if (same) { |
| log.debug("found flow entry that's the same {}-{}:::{}-{}", |
| new Object[] {srcPort, srcMac, dstPort, dstMac}); |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| } |