| /* |
| * Copyright 2017-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.opencord.dhcpl2relay; |
| |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Maps; |
| import com.google.common.collect.Lists; |
| 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.onlab.packet.DeserializationException; |
| import org.onlab.packet.DHCP; |
| import org.onlab.packet.DHCPOption; |
| import org.onlab.packet.DHCPPacketType; |
| import org.onlab.packet.Ethernet; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.IPv4; |
| import org.onlab.packet.MacAddress; |
| import org.onlab.packet.TpPort; |
| import org.onlab.packet.UDP; |
| import org.onlab.packet.VlanId; |
| import org.onosproject.mastership.MastershipEvent; |
| import org.onosproject.mastership.MastershipListener; |
| import org.onosproject.mastership.MastershipService; |
| import org.onosproject.net.device.DeviceEvent; |
| import org.onosproject.net.device.DeviceListener; |
| import org.opencord.dhcpl2relay.packet.DhcpEthernet; |
| import org.opencord.dhcpl2relay.packet.DhcpOption82; |
| import org.onlab.util.Tools; |
| import org.onosproject.cfg.ComponentConfigService; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.core.CoreService; |
| import org.onosproject.net.AnnotationKeys; |
| import org.onosproject.net.ConnectPoint; |
| import org.onosproject.net.Host; |
| import org.onosproject.net.Port; |
| import org.onosproject.net.config.ConfigFactory; |
| import org.onosproject.net.config.NetworkConfigEvent; |
| import org.onosproject.net.config.NetworkConfigListener; |
| import org.onosproject.net.config.NetworkConfigRegistry; |
| 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.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.opencord.sadis.SubscriberAndDeviceInformation; |
| import org.opencord.sadis.SubscriberAndDeviceInformationService; |
| import org.osgi.service.component.ComponentContext; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Dictionary; |
| import java.util.Map; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.concurrent.atomic.AtomicReference; |
| import java.util.stream.Collectors; |
| |
| import static org.onlab.packet.DHCP.DHCPOptionCode.OptionCode_MessageType; |
| import static org.onlab.packet.MacAddress.valueOf; |
| import static org.onosproject.net.config.basics.SubjectFactories.APP_SUBJECT_FACTORY; |
| |
| /** |
| * DHCP Relay Agent Application Component. |
| */ |
| @Component(immediate = true) |
| public class DhcpL2Relay { |
| |
| public static final String DHCP_L2RELAY_APP = "org.opencord.dhcpl2relay"; |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| private final InternalConfigListener cfgListener = |
| new InternalConfigListener(); |
| |
| private final Set<ConfigFactory> factories = ImmutableSet.of( |
| new ConfigFactory<ApplicationId, DhcpL2RelayConfig>(APP_SUBJECT_FACTORY, |
| DhcpL2RelayConfig.class, |
| "dhcpl2relay") { |
| @Override |
| public DhcpL2RelayConfig createConfig() { |
| return new DhcpL2RelayConfig(); |
| } |
| } |
| ); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected NetworkConfigRegistry cfgService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected PacketService packetService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected HostService hostService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected ComponentConfigService componentConfigService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected SubscriberAndDeviceInformationService subsService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected DeviceService deviceService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected MastershipService mastershipService; |
| |
| @Property(name = "option82", boolValue = true, |
| label = "Add option 82 to relayed packets") |
| protected boolean option82 = true; |
| |
| @Property(name = "enableDhcpBroadcastReplies", boolValue = false, |
| label = "Add option 82 to relayed packets") |
| protected boolean enableDhcpBroadcastReplies = false; |
| |
| private DhcpRelayPacketProcessor dhcpRelayPacketProcessor = |
| new DhcpRelayPacketProcessor(); |
| |
| private InnerMastershipListener changeListener = new InnerMastershipListener(); |
| private InnerDeviceListener deviceListener = new InnerDeviceListener(); |
| |
| // connect points to the DHCP server |
| Set<ConnectPoint> dhcpConnectPoints; |
| private AtomicReference<ConnectPoint> dhcpServerConnectPoint = new AtomicReference<>(); |
| private MacAddress dhcpConnectMac = MacAddress.BROADCAST; |
| private ApplicationId appId; |
| |
| static Map<String, DhcpAllocationInfo> allocationMap = Maps.newConcurrentMap(); |
| |
| @Activate |
| protected void activate(ComponentContext context) { |
| //start the dhcp relay agent |
| appId = coreService.registerApplication(DHCP_L2RELAY_APP); |
| componentConfigService.registerProperties(getClass()); |
| |
| cfgService.addListener(cfgListener); |
| mastershipService.addListener(changeListener); |
| deviceService.addListener(deviceListener); |
| |
| factories.forEach(cfgService::registerConfigFactory); |
| //update the dhcp server configuration. |
| updateConfig(); |
| //add the packet services. |
| packetService.addProcessor(dhcpRelayPacketProcessor, |
| PacketProcessor.director(0)); |
| requestDhcpPackets(); |
| if (context != null) { |
| modified(context); |
| } |
| |
| log.info("DHCP-L2-RELAY Started"); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| cfgService.removeListener(cfgListener); |
| factories.forEach(cfgService::unregisterConfigFactory); |
| packetService.removeProcessor(dhcpRelayPacketProcessor); |
| cancelDhcpPackets(); |
| |
| componentConfigService.unregisterProperties(getClass(), false); |
| |
| log.info("DHCP-L2-RELAY Stopped"); |
| } |
| |
| @Modified |
| protected void modified(ComponentContext context) { |
| |
| Dictionary<?, ?> properties = context.getProperties(); |
| |
| Boolean o = Tools.isPropertyEnabled(properties, "option82"); |
| if (o != null) { |
| option82 = o; |
| } |
| } |
| |
| /** |
| * Checks if this app has been configured. |
| * |
| * @return true if all information we need have been initialized |
| */ |
| private boolean configured() { |
| return dhcpServerConnectPoint.get() != null; |
| } |
| |
| /** |
| * Selects a connect point through an available device for which it is the master. |
| */ |
| private void selectServerConnectPoint() { |
| synchronized (this) { |
| dhcpServerConnectPoint.set(null); |
| if (dhcpConnectPoints != null) { |
| // find a connect point through a device for which we are master |
| for (ConnectPoint cp: dhcpConnectPoints) { |
| if (mastershipService.isLocalMaster(cp.deviceId())) { |
| if (deviceService.isAvailable(cp.deviceId())) { |
| dhcpServerConnectPoint.set(cp); |
| } |
| log.info("DHCP connectPoint selected is {}", cp); |
| break; |
| } |
| } |
| } |
| |
| log.info("DHCP Server connectPoint is {}", dhcpServerConnectPoint.get()); |
| |
| if (dhcpServerConnectPoint.get() == null) { |
| log.error("Master of none, can't relay DHCP Message to server"); |
| } |
| } |
| } |
| |
| /** |
| * Updates the network configuration. |
| */ |
| private void updateConfig() { |
| DhcpL2RelayConfig cfg = cfgService.getConfig(appId, DhcpL2RelayConfig.class); |
| if (cfg == null) { |
| log.warn("Dhcp Server info not available"); |
| return; |
| } |
| |
| dhcpConnectPoints = Sets.newConcurrentHashSet(cfg.getDhcpServerConnectPoint()); |
| |
| selectServerConnectPoint(); |
| |
| log.info("dhcp server connect point: " + dhcpServerConnectPoint); |
| } |
| |
| /** |
| * Request DHCP packet in via PacketService. |
| */ |
| private void requestDhcpPackets() { |
| TrafficSelector.Builder selectorServer = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_IPV4) |
| .matchIPProtocol(IPv4.PROTOCOL_UDP) |
| .matchUdpSrc(TpPort.tpPort(UDP.DHCP_SERVER_PORT)); |
| packetService.requestPackets(selectorServer.build(), |
| PacketPriority.CONTROL, appId); |
| |
| TrafficSelector.Builder selectorClient = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_IPV4) |
| .matchIPProtocol(IPv4.PROTOCOL_UDP) |
| .matchUdpSrc(TpPort.tpPort(UDP.DHCP_CLIENT_PORT)); |
| packetService.requestPackets(selectorClient.build(), |
| PacketPriority.CONTROL, appId); |
| |
| } |
| |
| /** |
| * Cancel requested DHCP packets in via packet service. |
| */ |
| private void cancelDhcpPackets() { |
| TrafficSelector.Builder selectorServer = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_IPV4) |
| .matchIPProtocol(IPv4.PROTOCOL_UDP) |
| .matchUdpSrc(TpPort.tpPort(UDP.DHCP_SERVER_PORT)); |
| packetService.cancelPackets(selectorServer.build(), |
| PacketPriority.CONTROL, appId); |
| |
| TrafficSelector.Builder selectorClient = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_IPV4) |
| .matchIPProtocol(IPv4.PROTOCOL_UDP) |
| .matchUdpSrc(TpPort.tpPort(UDP.DHCP_CLIENT_PORT)); |
| packetService.cancelPackets(selectorClient.build(), |
| PacketPriority.CONTROL, appId); |
| } |
| |
| public static Map<String, DhcpAllocationInfo> allocationMap() { |
| return allocationMap; |
| } |
| |
| private SubscriberAndDeviceInformation getDevice(PacketContext context) { |
| String serialNo = deviceService.getDevice(context.inPacket(). |
| receivedFrom().deviceId()).serialNumber(); |
| |
| return subsService.get(serialNo); |
| } |
| |
| private SubscriberAndDeviceInformation getDevice(ConnectPoint cp) { |
| String serialNo = deviceService.getDevice(cp.deviceId()). |
| serialNumber(); |
| |
| return subsService.get(serialNo); |
| } |
| |
| private MacAddress relayAgentMacAddress(PacketContext context) { |
| |
| SubscriberAndDeviceInformation device = this.getDevice(context); |
| if (device == null) { |
| log.warn("Device not found for {}", context.inPacket(). |
| receivedFrom()); |
| return null; |
| } |
| |
| return device.hardwareIdentifier(); |
| } |
| |
| private String nasPortId(PacketContext context) { |
| return nasPortId(context.inPacket().receivedFrom()); |
| } |
| |
| private String nasPortId(ConnectPoint cp) { |
| Port p = deviceService.getPort(cp); |
| return p.annotations().value(AnnotationKeys.PORT_NAME); |
| } |
| |
| private SubscriberAndDeviceInformation getSubscriber(PacketContext context) { |
| return subsService.get(nasPortId(context)); |
| } |
| |
| private VlanId cTag(PacketContext context) { |
| SubscriberAndDeviceInformation sub = getSubscriber(context); |
| if (sub == null) { |
| log.warn("Subscriber info not found for {}", context.inPacket(). |
| receivedFrom()); |
| return VlanId.NONE; |
| } |
| return sub.cTag(); |
| } |
| |
| private VlanId cTag(ConnectPoint cp) { |
| String portId = nasPortId(cp); |
| SubscriberAndDeviceInformation sub = subsService.get(portId); |
| if (sub == null) { |
| log.warn("Subscriber info not found for {} looking for C-TAG", cp); |
| return VlanId.NONE; |
| } |
| return sub.cTag(); |
| } |
| |
| private VlanId sTag(ConnectPoint cp) { |
| String portId = nasPortId(cp); |
| SubscriberAndDeviceInformation sub = subsService.get(portId); |
| if (sub == null) { |
| log.warn("Subscriber info not found for {} looking for S-TAG", cp); |
| return VlanId.NONE; |
| } |
| return sub.sTag(); |
| } |
| |
| private VlanId sTag(PacketContext context) { |
| SubscriberAndDeviceInformation sub = getSubscriber(context); |
| if (sub == null) { |
| log.warn("Subscriber info not found for {}", context.inPacket(). |
| receivedFrom()); |
| return VlanId.NONE; |
| } |
| return sub.sTag(); |
| } |
| |
| private class DhcpRelayPacketProcessor implements PacketProcessor { |
| |
| @Override |
| public void process(PacketContext context) { |
| if (!configured()) { |
| log.warn("Missing DHCP relay config. Abort packet processing"); |
| return; |
| } |
| |
| // process the packet and get the payload |
| DhcpEthernet packet = null; |
| ByteBuffer byteBuffer = context.inPacket().unparsed(); |
| try { |
| packet = DhcpEthernet.deserializer().deserialize(byteBuffer.array(), 0, byteBuffer.array().length); |
| } catch (DeserializationException e) { |
| log.warn("Unable to deserialize packet"); |
| } |
| |
| if (packet == null) { |
| log.warn("Packet is null"); |
| return; |
| } |
| |
| log.debug("Got a packet ", packet); |
| |
| if (packet.getEtherType() == DhcpEthernet.TYPE_IPV4) { |
| IPv4 ipv4Packet = (IPv4) packet.getPayload(); |
| |
| if (ipv4Packet.getProtocol() == IPv4.PROTOCOL_UDP) { |
| UDP udpPacket = (UDP) ipv4Packet.getPayload(); |
| if (udpPacket.getSourcePort() == UDP.DHCP_CLIENT_PORT || |
| udpPacket.getSourcePort() == UDP.DHCP_SERVER_PORT) { |
| DHCP dhcpPayload = (DHCP) udpPacket.getPayload(); |
| //This packet is dhcp. |
| processDhcpPacket(context, packet, dhcpPayload); |
| } |
| } |
| } |
| } |
| |
| //forward the packet to ConnectPoint where the DHCP server is attached. |
| private void forwardPacket(DhcpEthernet packet) { |
| |
| if (dhcpServerConnectPoint.get() != null) { |
| TrafficTreatment t = DefaultTrafficTreatment.builder() |
| .setOutput(dhcpServerConnectPoint.get().port()).build(); |
| OutboundPacket o = new DefaultOutboundPacket( |
| dhcpServerConnectPoint.get().deviceId(), t, |
| ByteBuffer.wrap(packet.serialize())); |
| if (log.isTraceEnabled()) { |
| log.trace("Relaying packet to dhcp server {} at {}", |
| packet, dhcpServerConnectPoint.get()); |
| } |
| packetService.emit(o); |
| } else { |
| log.warn("No dhcp server connect point"); |
| } |
| } |
| |
| // get the type of the DHCP packet |
| private DHCPPacketType getDhcpPacketType(DHCP dhcpPayload) { |
| |
| for (DHCPOption option : dhcpPayload.getOptions()) { |
| if (option.getCode() == OptionCode_MessageType.getValue()) { |
| byte[] data = option.getData(); |
| return DHCPPacketType.getType(data[0]); |
| } |
| } |
| return null; |
| } |
| |
| //process the dhcp packet before sending to server |
| private void processDhcpPacket(PacketContext context, DhcpEthernet packet, |
| DHCP dhcpPayload) { |
| if (dhcpPayload == null) { |
| log.warn("DHCP payload is null"); |
| return; |
| } |
| |
| DHCPPacketType incomingPacketType = getDhcpPacketType(dhcpPayload); |
| |
| log.info("Received DHCP Packet of type {}", incomingPacketType); |
| |
| switch (incomingPacketType) { |
| case DHCPDISCOVER: |
| DhcpEthernet ethernetPacketDiscover = |
| processDhcpPacketFromClient(context, packet); |
| if (ethernetPacketDiscover != null) { |
| forwardPacket(ethernetPacketDiscover); |
| } |
| break; |
| case DHCPOFFER: |
| //reply to dhcp client. |
| DhcpEthernet ethernetPacketOffer = processDhcpPacketFromServer(packet); |
| if (ethernetPacketOffer != null) { |
| sendReply(ethernetPacketOffer, dhcpPayload); |
| } |
| break; |
| case DHCPREQUEST: |
| DhcpEthernet ethernetPacketRequest = |
| processDhcpPacketFromClient(context, packet); |
| if (ethernetPacketRequest != null) { |
| forwardPacket(ethernetPacketRequest); |
| } |
| break; |
| case DHCPACK: |
| //reply to dhcp client. |
| DhcpEthernet ethernetPacketAck = processDhcpPacketFromServer(packet); |
| if (ethernetPacketAck != null) { |
| sendReply(ethernetPacketAck, dhcpPayload); |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| |
| private DhcpEthernet processDhcpPacketFromClient(PacketContext context, |
| DhcpEthernet ethernetPacket) { |
| |
| MacAddress relayAgentMac = relayAgentMacAddress(context); |
| if (relayAgentMac == null) { |
| log.warn("RelayAgent MAC not found "); |
| return null; |
| } |
| |
| DhcpEthernet etherReply = ethernetPacket; |
| |
| IPv4 ipv4Packet = (IPv4) etherReply.getPayload(); |
| UDP udpPacket = (UDP) ipv4Packet.getPayload(); |
| DHCP dhcpPacket = (DHCP) udpPacket.getPayload(); |
| |
| if (enableDhcpBroadcastReplies) { |
| // We want the reply to come back as a L2 broadcast |
| dhcpPacket.setFlags((short) 0x8000); |
| } |
| |
| // remove from the allocation map (used for display) as it's is |
| // requesting a fresh allocation |
| if (getDhcpPacketType(dhcpPacket) == DHCPPacketType.DHCPREQUEST) { |
| |
| String portId = nasPortId(context.inPacket().receivedFrom()); |
| SubscriberAndDeviceInformation sub = subsService.get(portId); |
| if (sub != null) { |
| allocationMap.remove(sub.nasPortId()); |
| } |
| } // end allocation for display |
| |
| if (option82) { |
| SubscriberAndDeviceInformation entry = getSubscriber(context); |
| if (entry == null) { |
| log.info("Dropping packet as subscriber entry is not available"); |
| return null; |
| } |
| |
| DHCP dhcpPacketWithOption82 = addOption82(dhcpPacket, entry); |
| udpPacket.setPayload(dhcpPacketWithOption82); |
| } |
| |
| ipv4Packet.setPayload(udpPacket); |
| etherReply.setPayload(ipv4Packet); |
| etherReply.setSourceMacAddress(relayAgentMac); |
| etherReply.setDestinationMacAddress(dhcpConnectMac); |
| |
| etherReply.setPriorityCode(ethernetPacket.getPriorityCode()); |
| etherReply.setVlanID(cTag(context).toShort()); |
| etherReply.setQinQtpid(DhcpEthernet.TYPE_VLAN); |
| etherReply.setQinQVid(sTag(context).toShort()); |
| |
| log.info("Finished processing packet -- sending packet {}", etherReply); |
| return etherReply; |
| } |
| |
| //build the DHCP offer/ack with proper client port. |
| private DhcpEthernet processDhcpPacketFromServer(DhcpEthernet ethernetPacket) { |
| // get dhcp header. |
| DhcpEthernet etherReply = (DhcpEthernet) ethernetPacket.clone(); |
| IPv4 ipv4Packet = (IPv4) etherReply.getPayload(); |
| UDP udpPacket = (UDP) ipv4Packet.getPayload(); |
| DHCP dhcpPayload = (DHCP) udpPacket.getPayload(); |
| |
| MacAddress dstMac = valueOf(dhcpPayload.getClientHardwareAddress()); |
| ConnectPoint subsCp = getConnectPointOfClient(dstMac); |
| // if it's an ACK packet store the information for display purpose |
| if (getDhcpPacketType(dhcpPayload) == DHCPPacketType.DHCPACK) { |
| |
| String portId = nasPortId(subsCp); |
| SubscriberAndDeviceInformation sub = subsService.get(portId); |
| if (sub != null) { |
| List<DHCPOption> options = dhcpPayload.getOptions(); |
| List<DHCPOption> circuitIds = options.stream() |
| .filter(option -> option.getCode() == DHCP.DHCPOptionCode.OptionCode_CircuitID.getValue()) |
| .collect(Collectors.toList()); |
| |
| String circuitId = "None"; |
| if (circuitIds.size() == 1) { |
| circuitId = circuitIds.get(0).getData().toString(); |
| } |
| |
| IpAddress ip = IpAddress.valueOf(dhcpPayload.getYourIPAddress()); |
| |
| //storeDHCPAllocationInfo |
| DhcpAllocationInfo info = new DhcpAllocationInfo(circuitId, dstMac, ip); |
| |
| allocationMap.put(sub.nasPortId(), info); |
| } |
| } // end storing of info |
| |
| // we leave the srcMac from the original packet |
| etherReply.setDestinationMacAddress(dstMac); |
| etherReply.setQinQVid(sTag(subsCp).toShort()); |
| etherReply.setPriorityCode(ethernetPacket.getPriorityCode()); |
| etherReply.setVlanID((cTag(subsCp).toShort())); |
| |
| if (option82) { |
| udpPacket.setPayload(removeOption82(dhcpPayload)); |
| } else { |
| udpPacket.setPayload(dhcpPayload); |
| } |
| ipv4Packet.setPayload(udpPacket); |
| etherReply.setPayload(ipv4Packet); |
| |
| log.info("Finished processing packet"); |
| return etherReply; |
| } |
| |
| /* |
| * Get ConnectPoint of the Client based on it's MAC address |
| */ |
| private ConnectPoint getConnectPointOfClient(MacAddress dstMac) { |
| Set<Host> hosts = hostService.getHostsByMac(dstMac); |
| if (hosts == null || hosts.isEmpty()) { |
| log.warn("Cannot determine host for DHCP client: {}. Aborting " |
| + "relay for dhcp packet from server", |
| dstMac); |
| return null; |
| } |
| for (Host h : hosts) { |
| // if more than one, |
| // find the connect point which has an valid entry in SADIS |
| ConnectPoint cp = new ConnectPoint(h.location().deviceId(), |
| h.location().port()); |
| |
| if (sTag(cp) != VlanId.NONE) { |
| return cp; |
| } |
| } |
| |
| return null; |
| } |
| |
| //send the response to the requester host. |
| private void sendReply(DhcpEthernet ethPacket, DHCP dhcpPayload) { |
| MacAddress descMac = valueOf(dhcpPayload.getClientHardwareAddress()); |
| ConnectPoint subCp = getConnectPointOfClient(descMac); |
| |
| // Send packet out to requester if the host information is available |
| if (subCp != null) { |
| log.info("Sending DHCP packet to cp: {}", subCp); |
| TrafficTreatment t = DefaultTrafficTreatment.builder() |
| .setOutput(subCp.port()).build(); |
| OutboundPacket o = new DefaultOutboundPacket( |
| subCp.deviceId(), t, ByteBuffer.wrap(ethPacket.serialize())); |
| if (log.isTraceEnabled()) { |
| log.trace("Relaying packet to dhcp client {}", ethPacket); |
| } |
| packetService.emit(o); |
| log.info("DHCP Packet sent to {}", subCp); |
| } else { |
| log.error("Dropping DHCP packet because can't find host for {}", descMac); |
| } |
| } |
| } |
| |
| private DHCP addOption82(DHCP dhcpPacket, SubscriberAndDeviceInformation entry) { |
| log.debug("option82data {} ", entry); |
| |
| List<DHCPOption> options = Lists.newArrayList(dhcpPacket.getOptions()); |
| DhcpOption82 option82 = new DhcpOption82(); |
| option82.setAgentCircuitId(entry.circuitId()); |
| option82.setAgentRemoteId(entry.remoteId()); |
| DHCPOption option = new DHCPOption() |
| .setCode(DHCP.DHCPOptionCode.OptionCode_CircuitID.getValue()) |
| .setData(option82.toByteArray()) |
| .setLength(option82.length()); |
| |
| options.add(options.size() - 1, option); |
| dhcpPacket.setOptions(options); |
| |
| return dhcpPacket; |
| |
| } |
| |
| private DHCP removeOption82(DHCP dhcpPacket) { |
| List<DHCPOption> options = dhcpPacket.getOptions(); |
| List<DHCPOption> newoptions = options.stream() |
| .filter(option -> option.getCode() != DHCP.DHCPOptionCode.OptionCode_CircuitID.getValue()) |
| .collect(Collectors.toList()); |
| |
| return dhcpPacket.setOptions(newoptions); |
| } |
| /** |
| * Listener for network config events. |
| */ |
| private class InternalConfigListener implements NetworkConfigListener { |
| |
| @Override |
| public void event(NetworkConfigEvent event) { |
| |
| if ((event.type() == NetworkConfigEvent.Type.CONFIG_ADDED || |
| event.type() == NetworkConfigEvent.Type.CONFIG_UPDATED) && |
| event.configClass().equals(DhcpL2RelayConfig.class)) { |
| updateConfig(); |
| log.info("Reconfigured"); |
| } |
| } |
| } |
| |
| /** |
| * Handles Mastership changes for the devices which connect |
| * to the DHCP server. |
| */ |
| private class InnerMastershipListener implements MastershipListener { |
| @Override |
| public void event(MastershipEvent event) { |
| if (dhcpServerConnectPoint.get() != null && |
| dhcpServerConnectPoint.get().deviceId(). |
| equals(event.subject())) { |
| log.trace("Mastership Event recevived for {}", event.subject()); |
| // mastership of the device for our connect point has changed |
| // reselect |
| selectServerConnectPoint(); |
| } |
| } |
| } |
| |
| /** |
| * Handles Device status change for the devices which connect |
| * to the DHCP server. |
| */ |
| private class InnerDeviceListener implements DeviceListener { |
| @Override |
| public void event(DeviceEvent event) { |
| log.trace("Device Event recevived for {} event {}", event.subject(), event.type()); |
| if (dhcpServerConnectPoint.get() == null) { |
| switch (event.type()) { |
| case DEVICE_ADDED: |
| case DEVICE_AVAILABILITY_CHANGED: |
| // some device is available check if we can get one |
| selectServerConnectPoint(); |
| break; |
| default: |
| break; |
| } |
| return; |
| } |
| if (dhcpServerConnectPoint.get().deviceId(). |
| equals(event.subject().id())) { |
| switch (event.type()) { |
| case DEVICE_AVAILABILITY_CHANGED: |
| case DEVICE_REMOVED: |
| case DEVICE_SUSPENDED: |
| // state of our device has changed, check if we need |
| // to re-select |
| selectServerConnectPoint(); |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| } |
| } |