| /* |
| * Copyright 2014-present Open Networking Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.onosproject.provider.host.impl; |
| |
| import com.google.common.collect.Sets; |
| import org.apache.felix.scr.annotations.Activate; |
| import org.apache.felix.scr.annotations.Component; |
| import org.apache.felix.scr.annotations.Deactivate; |
| import org.apache.felix.scr.annotations.Modified; |
| import org.apache.felix.scr.annotations.Property; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.apache.felix.scr.annotations.Service; |
| import org.onlab.packet.ARP; |
| import org.onlab.packet.BasePacket; |
| import org.onlab.packet.DHCP; |
| import org.onlab.packet.DHCP6; |
| import org.onlab.packet.EthType; |
| import org.onlab.packet.Ethernet; |
| import org.onlab.packet.ICMP6; |
| import org.onlab.packet.IPacket; |
| import org.onlab.packet.IPv4; |
| import org.onlab.packet.IPv6; |
| import org.onlab.packet.Ip4Address; |
| import org.onlab.packet.Ip6Address; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.MacAddress; |
| import org.onlab.packet.UDP; |
| import org.onlab.packet.VlanId; |
| import org.onlab.packet.dhcp.Dhcp6ClientIdOption; |
| import org.onlab.packet.dhcp.Dhcp6IaAddressOption; |
| import org.onlab.packet.dhcp.Dhcp6IaNaOption; |
| import org.onlab.packet.dhcp.Dhcp6IaTaOption; |
| import org.onlab.packet.dhcp.Dhcp6RelayOption; |
| import org.onlab.packet.ipv6.IExtensionHeader; |
| import org.onlab.packet.ndp.NeighborAdvertisement; |
| import org.onlab.packet.ndp.NeighborSolicitation; |
| import org.onlab.packet.ndp.RouterAdvertisement; |
| import org.onlab.packet.ndp.RouterSolicitation; |
| import org.onlab.util.Tools; |
| import org.onosproject.cfg.ComponentConfigService; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.core.CoreService; |
| import org.onosproject.net.host.HostLocationProbingService; |
| import org.onosproject.net.intf.InterfaceService; |
| import org.onosproject.net.ConnectPoint; |
| import org.onosproject.net.Device; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.net.Host; |
| import org.onosproject.net.HostId; |
| import org.onosproject.net.HostLocation; |
| import org.onosproject.net.device.DeviceEvent; |
| import org.onosproject.net.device.DeviceListener; |
| import org.onosproject.net.device.DeviceService; |
| import org.onosproject.net.flow.DefaultTrafficSelector; |
| import org.onosproject.net.flow.DefaultTrafficTreatment; |
| import org.onosproject.net.flow.TrafficSelector; |
| import org.onosproject.net.flow.TrafficTreatment; |
| import org.onosproject.net.host.DefaultHostDescription; |
| import org.onosproject.net.host.HostDescription; |
| import org.onosproject.net.host.HostProvider; |
| import org.onosproject.net.host.HostProviderRegistry; |
| import org.onosproject.net.host.HostProviderService; |
| import org.onosproject.net.host.HostService; |
| import org.onosproject.net.packet.DefaultOutboundPacket; |
| import org.onosproject.net.packet.OutboundPacket; |
| import org.onosproject.net.packet.PacketContext; |
| import org.onosproject.net.packet.PacketPriority; |
| import org.onosproject.net.packet.PacketProcessor; |
| import org.onosproject.net.packet.PacketService; |
| import org.onosproject.net.provider.AbstractProvider; |
| import org.onosproject.net.provider.ProviderId; |
| import org.onosproject.net.topology.Topology; |
| import org.onosproject.net.topology.TopologyService; |
| import org.osgi.service.component.ComponentContext; |
| import org.slf4j.Logger; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Dictionary; |
| import java.util.Objects; |
| import java.util.Optional; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.TimeUnit; |
| import java.util.stream.Stream; |
| import java.util.Set; |
| |
| import static java.util.concurrent.Executors.newScheduledThreadPool; |
| import static java.util.concurrent.Executors.newSingleThreadScheduledExecutor; |
| import static org.onlab.util.Tools.groupedThreads; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Provider which uses an OpenFlow controller to detect network end-station |
| * hosts. |
| */ |
| @Component(immediate = true) |
| @Service |
| public class HostLocationProvider extends AbstractProvider implements HostProvider, HostLocationProbingService { |
| private final Logger log = getLogger(getClass()); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected HostProviderRegistry providerRegistry; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected PacketService packetService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected TopologyService topologyService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected HostService hostService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected DeviceService deviceService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected ComponentConfigService cfgService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected InterfaceService interfaceService; |
| |
| private HostProviderService providerService; |
| |
| private final InternalHostProvider processor = new InternalHostProvider(); |
| private final DeviceListener deviceListener = new InternalDeviceListener(); |
| |
| private ApplicationId appId; |
| |
| @Property(name = "hostRemovalEnabled", boolValue = true, |
| label = "Enable host removal on port/device down events") |
| private boolean hostRemovalEnabled = true; |
| |
| @Property(name = "requestArp", boolValue = true, |
| label = "Request ARP packets for neighbor discovery by the " + |
| "Host Location Provider; default is true") |
| private boolean requestArp = true; |
| |
| @Property(name = "requestIpv6ND", boolValue = false, |
| label = "Requests IPv6 Neighbor Discovery by the " + |
| "Host Location Provider; default is false") |
| private boolean requestIpv6ND = false; |
| |
| @Property(name = "useDhcp", boolValue = false, |
| label = "Use DHCP to update IP address of the host; default is false") |
| private boolean useDhcp = false; |
| |
| @Property(name = "useDhcp6", boolValue = false, |
| label = "Use DHCPv6 to update IP address of the host; default is false") |
| private boolean useDhcp6 = false; |
| |
| @Property(name = "requestInterceptsEnabled", boolValue = true, |
| label = "Enable requesting packet intercepts") |
| private boolean requestInterceptsEnabled = true; |
| |
| @Property(name = "multihomingEnabled", boolValue = false, |
| label = "Allow hosts to be multihomed") |
| private boolean multihomingEnabled = false; |
| |
| private int probeInitDelayMs = 1000; |
| |
| ExecutorService eventHandler; |
| private ScheduledExecutorService hostProber; |
| |
| /** |
| * Creates an OpenFlow host provider. |
| */ |
| public HostLocationProvider() { |
| super(new ProviderId("of", "org.onosproject.provider.host")); |
| } |
| |
| @Activate |
| public void activate(ComponentContext context) { |
| cfgService.registerProperties(getClass()); |
| appId = coreService.registerApplication("org.onosproject.provider.host"); |
| eventHandler = newSingleThreadScheduledExecutor(groupedThreads("onos/host-loc-provider", "event-handler", log)); |
| hostProber = newScheduledThreadPool(32, groupedThreads("onos/host-loc-probe", "%d", log)); |
| providerService = providerRegistry.register(this); |
| packetService.addProcessor(processor, PacketProcessor.advisor(1)); |
| deviceService.addListener(deviceListener); |
| |
| modified(context); |
| |
| log.info("Started with Application ID {}", appId.id()); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| cfgService.unregisterProperties(getClass(), false); |
| |
| withdrawIntercepts(); |
| |
| providerRegistry.unregister(this); |
| packetService.removeProcessor(processor); |
| deviceService.removeListener(deviceListener); |
| eventHandler.shutdown(); |
| hostProber.shutdown(); |
| providerService = null; |
| log.info("Stopped"); |
| } |
| |
| @Modified |
| public void modified(ComponentContext context) { |
| readComponentConfiguration(context); |
| |
| if (requestInterceptsEnabled) { |
| requestIntercepts(); |
| } else { |
| withdrawIntercepts(); |
| } |
| } |
| |
| /** |
| * Request packet intercepts. |
| */ |
| private void requestIntercepts() { |
| // Use ARP |
| TrafficSelector arpSelector = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_ARP) |
| .build(); |
| if (requestArp) { |
| packetService.requestPackets(arpSelector, PacketPriority.CONTROL, appId); |
| } else { |
| packetService.cancelPackets(arpSelector, PacketPriority.CONTROL, appId); |
| } |
| |
| // Use IPv6 Neighbor Discovery |
| TrafficSelector ipv6NsSelector = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_IPV6) |
| .matchIPProtocol(IPv6.PROTOCOL_ICMP6) |
| .matchIcmpv6Type(ICMP6.NEIGHBOR_SOLICITATION) |
| .build(); |
| TrafficSelector ipv6NaSelector = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_IPV6) |
| .matchIPProtocol(IPv6.PROTOCOL_ICMP6) |
| .matchIcmpv6Type(ICMP6.NEIGHBOR_ADVERTISEMENT) |
| .build(); |
| if (requestIpv6ND) { |
| packetService.requestPackets(ipv6NsSelector, PacketPriority.CONTROL, appId); |
| packetService.requestPackets(ipv6NaSelector, PacketPriority.CONTROL, appId); |
| } else { |
| packetService.cancelPackets(ipv6NsSelector, PacketPriority.CONTROL, appId); |
| packetService.cancelPackets(ipv6NaSelector, PacketPriority.CONTROL, appId); |
| } |
| } |
| |
| /** |
| * Withdraw packet intercepts. |
| */ |
| private void withdrawIntercepts() { |
| TrafficSelector.Builder selector = DefaultTrafficSelector.builder(); |
| selector.matchEthType(Ethernet.TYPE_ARP); |
| packetService.cancelPackets(selector.build(), PacketPriority.CONTROL, appId); |
| |
| // IPv6 Neighbor Solicitation packet. |
| selector.matchEthType(Ethernet.TYPE_IPV6); |
| selector.matchIPProtocol(IPv6.PROTOCOL_ICMP6); |
| selector.matchIcmpv6Type(ICMP6.NEIGHBOR_SOLICITATION); |
| packetService.cancelPackets(selector.build(), PacketPriority.CONTROL, appId); |
| |
| // IPv6 Neighbor Advertisement packet. |
| selector.matchIcmpv6Type(ICMP6.NEIGHBOR_ADVERTISEMENT); |
| packetService.cancelPackets(selector.build(), PacketPriority.CONTROL, appId); |
| } |
| |
| /** |
| * Extracts properties from the component configuration context. |
| * |
| * @param context the component context |
| */ |
| private void readComponentConfiguration(ComponentContext context) { |
| Dictionary<?, ?> properties = context.getProperties(); |
| Boolean flag; |
| |
| flag = Tools.isPropertyEnabled(properties, "hostRemovalEnabled"); |
| if (flag == null) { |
| log.info("Host removal on port/device down events is not configured, " + |
| "using current value of {}", hostRemovalEnabled); |
| } else { |
| hostRemovalEnabled = flag; |
| log.info("Configured. Host removal on port/device down events is {}", |
| hostRemovalEnabled ? "enabled" : "disabled"); |
| } |
| |
| flag = Tools.isPropertyEnabled(properties, "requestArp"); |
| if (flag == null) { |
| log.info("Using ARP is not configured, " + |
| "using current value of {}", requestArp); |
| } else { |
| requestArp = flag; |
| log.info("Configured. Using ARP is {}", |
| requestArp ? "enabled" : "disabled"); |
| } |
| |
| flag = Tools.isPropertyEnabled(properties, "requestIpv6ND"); |
| if (flag == null) { |
| log.info("Using IPv6 Neighbor Discovery is not configured, " + |
| "using current value of {}", requestIpv6ND); |
| } else { |
| requestIpv6ND = flag; |
| log.info("Configured. Using IPv6 Neighbor Discovery is {}", |
| requestIpv6ND ? "enabled" : "disabled"); |
| } |
| |
| flag = Tools.isPropertyEnabled(properties, "useDhcp"); |
| if (flag == null) { |
| log.info("Using DHCP is not configured, " + |
| "using current value of {}", useDhcp); |
| } else { |
| useDhcp = flag; |
| log.info("Configured. Using DHCP is {}", |
| useDhcp ? "enabled" : "disabled"); |
| } |
| |
| flag = Tools.isPropertyEnabled(properties, "requestInterceptsEnabled"); |
| if (flag == null) { |
| log.info("Request intercepts is not configured, " + |
| "using current value of {}", requestInterceptsEnabled); |
| } else { |
| requestInterceptsEnabled = flag; |
| log.info("Configured. Request intercepts is {}", |
| requestInterceptsEnabled ? "enabled" : "disabled"); |
| } |
| |
| flag = Tools.isPropertyEnabled(properties, "multihomingEnabled"); |
| if (flag == null) { |
| log.info("Multihoming is not configured, " + |
| "using current value of {}", multihomingEnabled); |
| } else { |
| multihomingEnabled = flag; |
| log.info("Configured. Multihoming is {}", |
| multihomingEnabled ? "enabled" : "disabled"); |
| } |
| } |
| |
| @Override |
| public void probeHostLocation(Host host, ConnectPoint connectPoint, ProbeMode probeMode) { |
| host.ipAddresses().stream().findFirst().ifPresent(ip -> { |
| MacAddress probeMac = providerService.addPendingHostLocation(host.id(), connectPoint, probeMode); |
| log.debug("Constructing {} probe for host {} with {}", probeMode, host.id(), ip); |
| Ethernet probe; |
| if (ip.isIp4()) { |
| probe = ARP.buildArpRequest(probeMac.toBytes(), Ip4Address.ZERO.toOctets(), |
| host.id().mac().toBytes(), ip.toOctets(), |
| host.id().mac().toBytes(), host.id().vlanId().toShort()); |
| } else { |
| probe = NeighborSolicitation.buildNdpSolicit( |
| ip.getIp6Address(), |
| Ip6Address.valueOf(IPv6.getLinkLocalAddress(probeMac.toBytes())), |
| ip.getIp6Address(), |
| probeMac, |
| host.id().mac(), |
| host.id().vlanId()); |
| } |
| |
| // NOTE: delay the probe a little bit to wait for the store synchronization is done |
| hostProber.schedule(() -> |
| sendLocationProbe(probe, connectPoint), probeInitDelayMs, TimeUnit.MILLISECONDS); |
| }); |
| } |
| |
| /** |
| * Send the probe packet on given port. |
| * |
| * @param probe the probe packet |
| * @param connectPoint the port we want to probe |
| */ |
| private void sendLocationProbe(Ethernet probe, ConnectPoint connectPoint) { |
| log.info("Sending probe for host {} on location {} with probeMac {}", |
| probe.getDestinationMAC(), connectPoint, probe.getSourceMAC()); |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder().setOutput(connectPoint.port()).build(); |
| OutboundPacket outboundPacket = new DefaultOutboundPacket(connectPoint.deviceId(), |
| treatment, ByteBuffer.wrap(probe.serialize())); |
| packetService.emit(outboundPacket); |
| } |
| |
| @Override |
| public void triggerProbe(Host host) { |
| //log.info("Triggering probe on device {} ", host); |
| |
| // FIXME Disabling host probing for now, because sending packets from a |
| // broadcast MAC address caused problems when two ONOS networks were |
| // interconnected. Host probing should take into account the interface |
| // configuration when determining which source address to use. |
| |
| //MastershipRole role = deviceService.getRole(host.location().deviceId()); |
| //if (role.equals(MastershipRole.MASTER)) { |
| // host.ipAddresses().forEach(ip -> { |
| // sendProbe(host, ip); |
| // }); |
| //} else { |
| // log.info("not the master, master will probe {}"); |
| //} |
| } |
| |
| private void sendProbe(Host host, IpAddress targetIp) { |
| Ethernet probePacket = null; |
| if (targetIp.isIp4()) { |
| // IPv4: Use ARP |
| probePacket = buildArpRequest(targetIp, host); |
| } else { |
| // IPv6: Use Neighbor Discovery |
| //TODO need to implement ndp probe |
| log.info("Triggering probe on device {} ", host); |
| return; |
| } |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder().setOutput(host.location().port()).build(); |
| |
| OutboundPacket outboundPacket = new DefaultOutboundPacket(host.location().deviceId(), treatment, |
| ByteBuffer.wrap(probePacket.serialize())); |
| |
| packetService.emit(outboundPacket); |
| } |
| |
| // This method is using source ip as 0.0.0.0 , to receive the reply even from the sub net hosts. |
| private Ethernet buildArpRequest(IpAddress targetIp, Host host) { |
| return ARP.buildArpRequest(MacAddress.BROADCAST.toBytes(), Ip4Address.ZERO.toOctets(), |
| MacAddress.BROADCAST.toBytes(), targetIp.toOctets(), |
| MacAddress.BROADCAST.toBytes(), VlanId.NONE.toShort()); |
| } |
| |
| private class InternalHostProvider implements PacketProcessor { |
| /** |
| * Create or update host information. |
| * Will not update IP if IP is null, all zero or self-assigned. |
| * |
| * @param hid host ID |
| * @param mac source Mac address |
| * @param vlan VLAN ID |
| * @param innerVlan inner VLAN ID |
| * @param outerTpid outer TPID |
| * @param hloc host location |
| * @param ip source IP address or null if not updating |
| */ |
| private void createOrUpdateHost(HostId hid, MacAddress mac, VlanId vlan, |
| VlanId innerVlan, EthType outerTpid, |
| HostLocation hloc, IpAddress ip) { |
| Set<HostLocation> newLocations = Sets.newHashSet(hloc); |
| |
| if (multihomingEnabled) { |
| Host existingHost = hostService.getHost(hid); |
| if (existingHost != null) { |
| Set<HostLocation> prevLocations = existingHost.locations(); |
| |
| if (prevLocations.stream().noneMatch(loc -> loc.deviceId().equals(hloc.deviceId()))) { |
| // New location is on a device that we haven't seen before |
| // Could be a dual-home host. Append new location and send out the probe |
| newLocations.addAll(prevLocations); |
| prevLocations.forEach(prevLocation -> |
| probeHostLocation(existingHost, prevLocation, ProbeMode.VERIFY)); |
| } else { |
| // Move within the same switch |
| // Simply replace old location that is on the same device |
| prevLocations.stream().filter(loc -> !loc.deviceId().equals(hloc.deviceId())) |
| .forEach(newLocations::add); |
| } |
| } |
| } |
| |
| HostDescription desc = ip == null || ip.isZero() || ip.isSelfAssigned() ? |
| new DefaultHostDescription(mac, vlan, newLocations, Sets.newHashSet(), |
| innerVlan, outerTpid, false) : |
| new DefaultHostDescription(mac, vlan, newLocations, Sets.newHashSet(ip), |
| innerVlan, outerTpid, false); |
| try { |
| providerService.hostDetected(hid, desc, false); |
| } catch (IllegalStateException e) { |
| log.debug("Host {} suppressed", hid); |
| } |
| } |
| |
| /** |
| * Updates IP address for an existing host. |
| * |
| * @param hid host ID |
| * @param ip IP address |
| */ |
| private void updateHostIp(HostId hid, IpAddress ip) { |
| Host host = hostService.getHost(hid); |
| if (host == null) { |
| log.warn("Fail to update IP for {}. Host does not exist", hid); |
| return; |
| } |
| |
| HostDescription desc = new DefaultHostDescription(hid.mac(), hid.vlanId(), |
| host.locations(), Sets.newHashSet(ip), false); |
| try { |
| providerService.hostDetected(hid, desc, false); |
| } catch (IllegalStateException e) { |
| log.debug("Host {} suppressed", hid); |
| } |
| } |
| |
| @Override |
| public void process(PacketContext context) { |
| if (context == null) { |
| return; |
| } |
| |
| Ethernet eth = context.inPacket().parsed(); |
| if (eth == null) { |
| return; |
| } |
| |
| MacAddress srcMac = eth.getSourceMAC(); |
| if (srcMac.isBroadcast() || srcMac.isMulticast()) { |
| return; |
| } |
| |
| VlanId vlan = VlanId.vlanId(eth.getVlanID()); |
| VlanId outerVlan = VlanId.vlanId(eth.getQinQVID()); |
| VlanId innerVlan = VlanId.NONE; |
| EthType outerTpid = EthType.EtherType.UNKNOWN.ethType(); |
| // Set up values for double-tagged hosts |
| if (outerVlan.toShort() != Ethernet.VLAN_UNTAGGED) { |
| innerVlan = vlan; |
| vlan = outerVlan; |
| outerTpid = EthType.EtherType.lookup(eth.getQinQTPID()).ethType(); |
| } |
| ConnectPoint heardOn = context.inPacket().receivedFrom(); |
| |
| // If this arrived on control port, bail out. |
| if (heardOn.port().isLogical()) { |
| return; |
| } |
| |
| // If this is not an edge port, bail out. |
| Topology topology = topologyService.currentTopology(); |
| if (topologyService.isInfrastructure(topology, heardOn)) { |
| return; |
| } |
| |
| HostLocation hloc = new HostLocation(heardOn, System.currentTimeMillis()); |
| HostId hid = HostId.hostId(eth.getSourceMAC(), vlan); |
| MacAddress destMac = eth.getDestinationMAC(); |
| |
| // Receives a location probe. Invalid entry from the cache |
| if (multihomingEnabled && destMac.isOnos() && !MacAddress.NONE.equals(destMac)) { |
| log.info("Receives probe for {}/{} on {}", srcMac, vlan, heardOn); |
| providerService.removePendingHostLocation(destMac); |
| return; |
| } |
| |
| // ARP: possible new hosts, update both location and IP |
| if (eth.getEtherType() == Ethernet.TYPE_ARP) { |
| ARP arp = (ARP) eth.getPayload(); |
| IpAddress ip = IpAddress.valueOf(IpAddress.Version.INET, |
| arp.getSenderProtocolAddress()); |
| createOrUpdateHost(hid, srcMac, vlan, innerVlan, outerTpid, hloc, ip); |
| |
| // IPv4: update location only |
| } else if (eth.getEtherType() == Ethernet.TYPE_IPV4) { |
| // Update host location |
| createOrUpdateHost(hid, srcMac, vlan, innerVlan, outerTpid, hloc, null); |
| if (useDhcp) { |
| DHCP dhcp = findDhcp(eth).orElse(null); |
| // DHCP ACK: additionally update IP of DHCP client |
| if (dhcp != null && dhcp.getPacketType().equals(DHCP.MsgType.DHCPACK)) { |
| MacAddress hostMac = MacAddress.valueOf(dhcp.getClientHardwareAddress()); |
| VlanId hostVlan = VlanId.vlanId(eth.getVlanID()); |
| HostId hostId = HostId.hostId(hostMac, hostVlan); |
| updateHostIp(hostId, IpAddress.valueOf(dhcp.getYourIPAddress())); |
| } |
| } |
| // NeighborAdvertisement and NeighborSolicitation: possible |
| // new hosts, update both location and IP. |
| // |
| // IPv6: update location only |
| } else if (eth.getEtherType() == Ethernet.TYPE_IPV6) { |
| IPv6 ipv6 = (IPv6) eth.getPayload(); |
| IpAddress ip = IpAddress.valueOf(IpAddress.Version.INET6, |
| ipv6.getSourceAddress()); |
| |
| // skip extension headers |
| IPacket pkt = ipv6; |
| while (pkt.getPayload() != null && |
| pkt.getPayload() instanceof IExtensionHeader) { |
| pkt = pkt.getPayload(); |
| } |
| pkt = pkt.getPayload(); |
| |
| // DHCPv6 protocol |
| DHCP6 dhcp6 = findDhcp6(pkt).orElse(null); |
| if (dhcp6 != null && useDhcp6) { |
| createOrUpdateHost(hid, srcMac, vlan, innerVlan, outerTpid, hloc, null); |
| handleDhcp6(dhcp6, vlan); |
| return; |
| } |
| |
| if (pkt != null && pkt instanceof ICMP6) { |
| // Neighbor Discovery Protocol |
| pkt = pkt.getPayload(); |
| if (pkt != null) { |
| // RouterSolicitation, RouterAdvertisement |
| if (pkt instanceof RouterAdvertisement || pkt instanceof RouterSolicitation) { |
| return; |
| } |
| if (pkt instanceof NeighborSolicitation || pkt instanceof NeighborAdvertisement) { |
| // Duplicate Address Detection |
| if (ip.isZero()) { |
| return; |
| } |
| // NeighborSolicitation, NeighborAdvertisement |
| createOrUpdateHost(hid, srcMac, vlan, innerVlan, outerTpid, hloc, ip); |
| |
| // Also learn from the target address of NeighborAdvertisement |
| if (pkt instanceof NeighborAdvertisement) { |
| NeighborAdvertisement na = (NeighborAdvertisement) pkt; |
| Ip6Address targetAddr = Ip6Address.valueOf(na.getTargetAddress()); |
| createOrUpdateHost(hid, srcMac, vlan, innerVlan, outerTpid, hloc, targetAddr); |
| } |
| return; |
| } |
| } |
| } |
| |
| // multicast, exclude DHCPv6 |
| if (eth.isMulticast() && dhcp6 == null) { |
| return; |
| } |
| |
| // normal IPv6 packets |
| createOrUpdateHost(hid, srcMac, vlan, innerVlan, outerTpid, hloc, null); |
| } |
| } |
| |
| /** |
| * Handles DHCPv6 packet, if message type is ACK, update IP address |
| * according to DHCPv6 payload (IA Address option). |
| * |
| * @param dhcp6 the DHCPv6 payload |
| * @param vlanId the vlan of this packet |
| */ |
| private void handleDhcp6(DHCP6 dhcp6, VlanId vlanId) { |
| // extract the relay message if exist |
| while (dhcp6 != null && DHCP6.RELAY_MSG_TYPES.contains(dhcp6.getMsgType())) { |
| dhcp6 = dhcp6.getOptions().stream() |
| .filter(opt -> opt instanceof Dhcp6RelayOption) |
| .map(BasePacket::getPayload) |
| .map(pld -> (DHCP6) pld) |
| .findFirst() |
| .orElse(null); |
| } |
| |
| if (dhcp6 == null) { |
| // Can't find dhcp payload |
| log.warn("Can't find dhcp payload from relay message"); |
| return; |
| } |
| |
| if (dhcp6.getMsgType() != DHCP6.MsgType.REPLY.value()) { |
| // Update IP address only when we received REPLY message |
| return; |
| } |
| Optional<Dhcp6ClientIdOption> clientIdOption = dhcp6.getOptions() |
| .stream() |
| .filter(opt -> opt instanceof Dhcp6ClientIdOption) |
| .map(opt -> (Dhcp6ClientIdOption) opt) |
| .findFirst(); |
| |
| if (!clientIdOption.isPresent()) { |
| // invalid DHCPv6 option |
| log.warn("Can't find client ID from DHCPv6 {}", dhcp6); |
| return; |
| } |
| |
| byte[] linkLayerAddr = clientIdOption.get().getDuid().getLinkLayerAddress(); |
| if (linkLayerAddr == null || linkLayerAddr.length != 6) { |
| // No any mac address found |
| log.warn("Can't find client mac from option {}", clientIdOption); |
| return; |
| } |
| MacAddress clientMac = MacAddress.valueOf(linkLayerAddr); |
| |
| // Extract IPv6 address from IA NA ot IA TA option |
| Optional<Dhcp6IaNaOption> iaNaOption = dhcp6.getOptions() |
| .stream() |
| .filter(opt -> opt instanceof Dhcp6IaNaOption) |
| .map(opt -> (Dhcp6IaNaOption) opt) |
| .findFirst(); |
| Optional<Dhcp6IaTaOption> iaTaOption = dhcp6.getOptions() |
| .stream() |
| .filter(opt -> opt instanceof Dhcp6IaTaOption) |
| .map(opt -> (Dhcp6IaTaOption) opt) |
| .findFirst(); |
| Optional<Dhcp6IaAddressOption> iaAddressOption; |
| if (iaNaOption.isPresent()) { |
| iaAddressOption = iaNaOption.get().getOptions().stream() |
| .filter(opt -> opt instanceof Dhcp6IaAddressOption) |
| .map(opt -> (Dhcp6IaAddressOption) opt) |
| .findFirst(); |
| } else if (iaTaOption.isPresent()) { |
| iaAddressOption = iaTaOption.get().getOptions().stream() |
| .filter(opt -> opt instanceof Dhcp6IaAddressOption) |
| .map(opt -> (Dhcp6IaAddressOption) opt) |
| .findFirst(); |
| } else { |
| iaAddressOption = Optional.empty(); |
| } |
| if (iaAddressOption.isPresent()) { |
| Ip6Address ip = iaAddressOption.get().getIp6Address(); |
| HostId hostId = HostId.hostId(clientMac, vlanId); |
| updateHostIp(hostId, ip); |
| } else { |
| log.warn("Can't find IPv6 address from DHCPv6 {}", dhcp6); |
| } |
| } |
| |
| private Optional<DHCP> findDhcp(Ethernet eth) { |
| IPacket pkt = eth.getPayload(); |
| return Stream.of(pkt) |
| .filter(Objects::nonNull) |
| .filter(p -> p instanceof IPv4) |
| .map(IPacket::getPayload) |
| .filter(Objects::nonNull) |
| .filter(p -> p instanceof UDP) |
| .map(IPacket::getPayload) |
| .filter(Objects::nonNull) |
| .filter(p -> p instanceof DHCP) |
| .map(p -> (DHCP) p) |
| .findFirst(); |
| } |
| |
| private Optional<DHCP6> findDhcp6(IPacket pkt) { |
| return Stream.of(pkt) |
| .filter(Objects::nonNull) |
| .filter(p -> p instanceof UDP) |
| .map(IPacket::getPayload) |
| .filter(Objects::nonNull) |
| .filter(p -> p instanceof DHCP6) |
| .map(p -> (DHCP6) p) |
| .findFirst(); |
| } |
| } |
| |
| // Auxiliary listener to device events. |
| private class InternalDeviceListener implements DeviceListener { |
| @Override |
| public void event(DeviceEvent event) { |
| eventHandler.execute(() -> handleEvent(event)); |
| } |
| |
| private void handleEvent(DeviceEvent event) { |
| Device device = event.subject(); |
| switch (event.type()) { |
| case DEVICE_ADDED: |
| break; |
| case DEVICE_AVAILABILITY_CHANGED: |
| if (hostRemovalEnabled && !deviceService.isAvailable(device.id())) { |
| processDeviceDown(device.id()); |
| } |
| break; |
| case DEVICE_SUSPENDED: |
| case DEVICE_UPDATED: |
| // Nothing to do? |
| break; |
| case DEVICE_REMOVED: |
| if (hostRemovalEnabled) { |
| processDeviceDown(device.id()); |
| } |
| break; |
| case PORT_ADDED: |
| break; |
| case PORT_UPDATED: |
| if (hostRemovalEnabled && !event.port().isEnabled()) { |
| processPortDown(new ConnectPoint(device.id(), event.port().number())); |
| } |
| break; |
| case PORT_REMOVED: |
| // Nothing to do? |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| |
| /** |
| * When a device goes down, update the location of affected hosts. |
| * |
| * @param deviceId the device that goes down |
| */ |
| private void processDeviceDown(DeviceId deviceId) { |
| hostService.getConnectedHosts(deviceId).forEach(affectedHost -> affectedHost.locations().stream() |
| .filter(hostLocation -> hostLocation.deviceId().equals(deviceId)) |
| .forEach(affectedLocation -> |
| providerService.removeLocationFromHost(affectedHost.id(), affectedLocation)) |
| ); |
| } |
| |
| /** |
| * When a port goes down, update the location of affected hosts. |
| * |
| * @param connectPoint the port that goes down |
| */ |
| private void processPortDown(ConnectPoint connectPoint) { |
| hostService.getConnectedHosts(connectPoint).forEach(affectedHost -> |
| providerService.removeLocationFromHost(affectedHost.id(), new HostLocation(connectPoint, 0L)) |
| ); |
| } |
| |
| } |