| package net.onrc.onos.apps.segmentrouting; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import net.floodlightcontroller.core.IFloodlightProviderService; |
| import net.floodlightcontroller.core.IOFSwitch; |
| import net.floodlightcontroller.core.module.FloodlightModuleContext; |
| import net.floodlightcontroller.util.MACAddress; |
| import net.onrc.onos.core.flowprogrammer.IFlowPusherService; |
| import net.onrc.onos.core.packet.Ethernet; |
| import net.onrc.onos.core.packet.IPv4; |
| import net.onrc.onos.core.topology.ITopologyService; |
| import net.onrc.onos.core.topology.MutableTopology; |
| import net.onrc.onos.core.topology.Port; |
| import net.onrc.onos.core.topology.Switch; |
| |
| import org.projectfloodlight.openflow.protocol.OFFactory; |
| import org.projectfloodlight.openflow.protocol.OFMatchV3; |
| import org.projectfloodlight.openflow.protocol.OFMessage; |
| import org.projectfloodlight.openflow.protocol.OFOxmList; |
| import org.projectfloodlight.openflow.protocol.action.OFAction; |
| import org.projectfloodlight.openflow.protocol.instruction.OFInstruction; |
| import org.projectfloodlight.openflow.protocol.oxm.OFOxmEthDst; |
| import org.projectfloodlight.openflow.protocol.oxm.OFOxmEthSrc; |
| import org.projectfloodlight.openflow.protocol.oxm.OFOxmEthType; |
| import org.projectfloodlight.openflow.protocol.oxm.OFOxmIpv4DstMasked; |
| import org.projectfloodlight.openflow.types.EthType; |
| import org.projectfloodlight.openflow.types.IPv4Address; |
| import org.projectfloodlight.openflow.types.MacAddress; |
| import org.projectfloodlight.openflow.types.OFBufferId; |
| import org.projectfloodlight.openflow.types.OFPort; |
| import org.projectfloodlight.openflow.types.TableId; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class GenericIpHandler { |
| |
| private MutableTopology mutableTopology; |
| private ITopologyService topologyService; |
| private IFloodlightProviderService floodlightProvider; |
| private IFlowPusherService flowPusher; |
| private SegmentRoutingManager srManager; |
| |
| private static final Logger log = LoggerFactory |
| .getLogger(GenericIpHandler.class); |
| |
| private static final int TABLE_VLAN = 0; |
| private static final int TABLE_TMAC = 1; |
| private static final int TABLE_IPv4_UNICAST = 2; |
| private static final int TABLE_MPLS = 3; |
| private static final int TABLE_META = 4; |
| private static final int TABLE_ACL = 5; |
| |
| private static final short MAX_PRIORITY = (short) 0xffff; |
| private static final short SLASH_24_PRIORITY = (short) 0xfff0; |
| private static final short SLASH_16_PRIORITY = (short) 0xff00; |
| private static final short SLASH_8_PRIORITY = (short) 0xf000; |
| private static final short MIN_PRIORITY = 0x0; |
| |
| public GenericIpHandler(FloodlightModuleContext context, SegmentRoutingManager sr) { |
| this.floodlightProvider = context |
| .getServiceImpl(IFloodlightProviderService.class); |
| this.topologyService = context.getServiceImpl(ITopologyService.class); |
| this.mutableTopology = topologyService.getTopology(); |
| this.flowPusher = context.getServiceImpl(IFlowPusherService.class); |
| this.srManager = sr; |
| |
| } |
| |
| public void processPacketIn(Switch sw, Port inPort, Ethernet payload) { |
| // TODO Auto-generated method stub |
| log.debug("GenericIPHandler: Received a IP packet {} from sw {} ", |
| payload.toString(), sw.getDpid()); |
| IPv4 ipv4 = (IPv4) payload.getPayload(); |
| int destinationAddress = ipv4.getDestinationAddress(); |
| |
| // Check if the destination is any host known to TopologyService |
| for (net.onrc.onos.core.topology.Host host : mutableTopology.getHosts()) { |
| IPv4Address hostIpAddress = IPv4Address.of(host.getIpAddress()); |
| if (hostIpAddress != null && hostIpAddress.getInt() == destinationAddress) { |
| byte[] destinationMacAddress = host.getMacAddress().toBytes(); |
| addRouteToHost(sw, destinationAddress, destinationMacAddress); |
| return; |
| } |
| } |
| |
| // Check if the destination is within subnets of the swtich |
| if (isWithinSubnets(sw, IPv4Address.of(destinationAddress).toString())) { |
| srManager.addPacket(ipv4); |
| srManager.sendArpRequest(sw, destinationAddress, inPort); |
| } |
| } |
| |
| private boolean isWithinSubnets(Switch sw, String ipAddress) { |
| |
| return true; |
| } |
| |
| /** |
| * Add routing rules to forward packets to known hosts |
| * |
| * @param sw Switch |
| * @param hostIp Host IP address to forwards packets to |
| */ |
| public void addRouteToHost(Switch sw, int destinationAddress, |
| byte[] destinationMacAddress) { |
| |
| // If we do not know the host, then we cannot set the forwarding rule |
| net.onrc.onos.core.topology.Host host = mutableTopology.getHostByMac(MACAddress |
| .valueOf(destinationMacAddress)); |
| if (host == null) { |
| return; |
| } |
| |
| IOFSwitch ofSwitch = floodlightProvider.getMasterSwitch(sw.getDpid().value()); |
| OFFactory factory = ofSwitch.getFactory(); |
| |
| OFOxmEthType ethTypeIp = factory.oxms() |
| .ethType(EthType.IPv4); |
| OFOxmIpv4DstMasked ipPrefix = factory.oxms() |
| .ipv4DstMasked( |
| IPv4Address.of(destinationAddress), |
| IPv4Address.NO_MASK); // host addr should be /32 |
| OFOxmList oxmListSlash32 = OFOxmList.of(ethTypeIp, ipPrefix); |
| OFMatchV3 match = factory.buildMatchV3() |
| .setOxmList(oxmListSlash32).build(); |
| OFAction setDmac = null; |
| OFOxmEthDst dmac = factory.oxms() |
| .ethDst(MacAddress.of(destinationMacAddress)); |
| setDmac = factory.actions().buildSetField() |
| .setField(dmac).build(); |
| |
| OFAction decTtl = factory.actions().decNwTtl(); |
| |
| // Set the source MAC address with the switch MAC address |
| String switchMacAddress = sw.getStringAttribute("routerMac"); |
| OFOxmEthSrc srcAddr = factory.oxms().ethSrc(MacAddress.of(switchMacAddress)); |
| OFAction setSA = factory.actions().buildSetField() |
| .setField(srcAddr).build(); |
| |
| List<OFAction> actionList = new ArrayList<OFAction>(); |
| actionList.add(setDmac); |
| actionList.add(decTtl); |
| actionList.add(setSA); |
| |
| /* TODO : need to check the config file for all packets |
| String subnets = sw.getStringAttribute("subnets"); |
| try { |
| JSONArray arry = new JSONArray(subnets); |
| for (int i = 0; i < arry.length(); i++) { |
| String subnetIp = (String) arry.getJSONObject(i).get("subnetIp"); |
| int portNo = (int) arry.getJSONObject(i).get("portNo"); |
| |
| if (netMatch(subnetIp, IPv4Address.of(hostIp.getDestinationAddress()).toString())) { |
| OFAction out = factory.actions().buildOutput() |
| .setPort(OFPort.of(portNo)).build(); |
| actionList.add(out); |
| } |
| } |
| } catch (JSONException e) { |
| // TODO Auto-generated catch block |
| e.printStackTrace(); |
| } |
| */ |
| |
| // Set output port |
| for (Port port : host.getAttachmentPoints()) { |
| OFAction out = factory.actions().buildOutput() |
| .setPort(OFPort.of(port.getPortNumber().shortValue())).build(); |
| actionList.add(out); |
| } |
| |
| OFInstruction writeInstr = factory.instructions().buildWriteActions() |
| .setActions(actionList).build(); |
| |
| List<OFInstruction> instructions = new ArrayList<OFInstruction>(); |
| instructions.add(writeInstr); |
| |
| OFMessage myIpEntry = factory.buildFlowAdd() |
| .setTableId(TableId.of(TABLE_IPv4_UNICAST)) |
| .setMatch(match) |
| .setInstructions(instructions) |
| .setPriority(MAX_PRIORITY) |
| .setBufferId(OFBufferId.NO_BUFFER) |
| .setIdleTimeout(0) |
| .setHardTimeout(0) |
| // .setXid(getNextTransactionId()) |
| .build(); |
| |
| log.debug("Sending 'Routing information' OF message to the switch {}.", sw |
| .getDpid().toString()); |
| |
| flowPusher.add(sw.getDpid(), myIpEntry); |
| |
| } |
| |
| } |