| /* |
| * 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.onosproject.dhcprelay; |
| |
| import com.google.common.collect.HashMultimap; |
| import com.google.common.collect.Multimap; |
| import org.apache.felix.scr.annotations.Activate; |
| import org.apache.felix.scr.annotations.Deactivate; |
| import com.google.common.collect.Sets; |
| import com.google.common.collect.ImmutableSet; |
| import org.apache.felix.scr.annotations.Component; |
| 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.BasePacket; |
| import org.onlab.packet.DHCP6; |
| import org.onlab.packet.IPv6; |
| import org.onlab.packet.Ethernet; |
| import org.onlab.packet.Ip6Address; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.IpPrefix; |
| import org.onlab.packet.MacAddress; |
| import org.onlab.packet.TpPort; |
| import org.onlab.packet.UDP; |
| import org.onlab.packet.VlanId; |
| import org.onlab.packet.dhcp.Dhcp6RelayOption; |
| import org.onlab.packet.dhcp.Dhcp6InterfaceIdOption; |
| import org.onlab.packet.dhcp.Dhcp6Option; |
| import org.onlab.packet.dhcp.Dhcp6IaNaOption; |
| import org.onlab.packet.dhcp.Dhcp6IaTaOption; |
| import org.onlab.packet.dhcp.Dhcp6IaPdOption; |
| import org.onlab.packet.dhcp.Dhcp6IaAddressOption; |
| import org.onlab.packet.dhcp.Dhcp6IaPrefixOption; |
| import org.onlab.util.HexString; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.core.CoreService; |
| import org.onosproject.dhcprelay.api.DhcpHandler; |
| import org.onosproject.dhcprelay.api.DhcpServerInfo; |
| import org.onosproject.dhcprelay.config.IgnoreDhcpConfig; |
| import org.onosproject.dhcprelay.store.DhcpRelayStore; |
| import org.onosproject.net.Device; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.net.behaviour.Pipeliner; |
| import org.onosproject.net.device.DeviceService; |
| import org.onosproject.net.flow.DefaultTrafficSelector; |
| import org.onosproject.net.flow.TrafficSelector; |
| import org.onosproject.net.flowobjective.DefaultForwardingObjective; |
| import org.onosproject.net.flowobjective.FlowObjectiveService; |
| import org.onosproject.net.flowobjective.ForwardingObjective; |
| import org.onosproject.net.flowobjective.Objective; |
| import org.onosproject.net.flowobjective.ObjectiveContext; |
| import org.onosproject.net.flowobjective.ObjectiveError; |
| 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.host.DefaultHostDescription; |
| import org.onosproject.net.host.HostDescription; |
| import org.onosproject.net.host.InterfaceIpAddress; |
| import org.onosproject.net.host.HostListener; |
| import org.onosproject.net.host.HostEvent; |
| import org.onosproject.net.intf.Interface; |
| import org.onosproject.net.intf.InterfaceService; |
| import org.onosproject.net.packet.PacketPriority; |
| import org.onosproject.net.provider.ProviderId; |
| import org.onosproject.routeservice.Route; |
| import org.onosproject.routeservice.RouteStore; |
| import org.onosproject.dhcprelay.config.DhcpServerConfig; |
| import org.onosproject.net.ConnectPoint; |
| import org.onosproject.net.Host; |
| import org.onosproject.net.HostId; |
| import org.onosproject.net.HostLocation; |
| import org.onosproject.net.packet.DefaultOutboundPacket; |
| import org.onosproject.net.packet.OutboundPacket; |
| import org.onosproject.net.packet.PacketContext; |
| import org.onosproject.net.packet.PacketService; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.onosproject.net.flow.DefaultTrafficTreatment; |
| import org.onosproject.net.flow.TrafficTreatment; |
| |
| |
| import java.nio.ByteBuffer; |
| import java.util.List; |
| import java.util.Collection; |
| import java.util.Optional; |
| import java.util.Set; |
| import java.util.ArrayList; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static com.google.common.base.Preconditions.checkState; |
| import static org.onosproject.net.flowobjective.Objective.Operation.ADD; |
| import static org.onosproject.net.flowobjective.Objective.Operation.REMOVE; |
| |
| @Component |
| @Service |
| @Property(name = "version", value = "6") |
| public class Dhcp6HandlerImpl implements DhcpHandler, HostProvider { |
| public static final String DHCP_V6_RELAY_APP = "org.onosproject.Dhcp6HandlerImpl"; |
| public static final ProviderId PROVIDER_ID = new ProviderId("dhcp6", DHCP_V6_RELAY_APP); |
| private static final int IGNORE_CONTROL_PRIORITY = PacketPriority.CONTROL.priorityValue() + 1000; |
| |
| private static final TrafficSelector CLIENT_SERVER_SELECTOR = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_IPV6) |
| .matchIPProtocol(IPv6.PROTOCOL_UDP) |
| .matchIPv6Src(IpPrefix.IPV6_LINK_LOCAL_PREFIX) |
| .matchIPv6Dst(Ip6Address.ALL_DHCP_RELAY_AGENTS_AND_SERVERS.toIpPrefix()) |
| .matchUdpSrc(TpPort.tpPort(UDP.DHCP_V6_CLIENT_PORT)) |
| .matchUdpDst(TpPort.tpPort(UDP.DHCP_V6_SERVER_PORT)) |
| .build(); |
| private static final TrafficSelector SERVER_RELAY_SELECTOR = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_IPV6) |
| .matchIPProtocol(IPv6.PROTOCOL_UDP) |
| .matchUdpSrc(TpPort.tpPort(UDP.DHCP_V6_SERVER_PORT)) |
| .matchUdpDst(TpPort.tpPort(UDP.DHCP_V6_SERVER_PORT)) |
| .build(); |
| static final Set<TrafficSelector> DHCP_SELECTORS = ImmutableSet.of( |
| CLIENT_SERVER_SELECTOR, |
| SERVER_RELAY_SELECTOR |
| ); |
| private static Logger log = LoggerFactory.getLogger(Dhcp6HandlerImpl.class); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected DhcpRelayStore dhcpRelayStore; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected PacketService packetService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected RouteStore routeStore; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected InterfaceService interfaceService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected HostService hostService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected HostProviderRegistry providerRegistry; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected DeviceService deviceService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected FlowObjectiveService flowObjectiveService; |
| |
| protected HostProviderService providerService; |
| protected ApplicationId appId; |
| protected Multimap<DeviceId, VlanId> ignoredVlans = HashMultimap.create(); |
| private InternalHostListener hostListener = new InternalHostListener(); |
| |
| private List<DhcpServerInfo> defaultServerInfoList = new CopyOnWriteArrayList<>(); |
| private List<DhcpServerInfo> indirectServerInfoList = new CopyOnWriteArrayList<>(); |
| |
| |
| // CLIENT message types |
| public static final Set<Byte> MSG_TYPE_FROM_CLIENT = |
| ImmutableSet.of(DHCP6.MsgType.SOLICIT.value(), |
| DHCP6.MsgType.REQUEST.value(), |
| DHCP6.MsgType.REBIND.value(), |
| DHCP6.MsgType.RENEW.value(), |
| DHCP6.MsgType.RELEASE.value(), |
| DHCP6.MsgType.DECLINE.value(), |
| DHCP6.MsgType.CONFIRM.value(), |
| DHCP6.MsgType.RELAY_FORW.value()); |
| // SERVER message types |
| public static final Set<Byte> MSG_TYPE_FROM_SERVER = |
| ImmutableSet.of(DHCP6.MsgType.RELAY_REPL.value()); |
| |
| @Activate |
| protected void activate() { |
| appId = coreService.registerApplication(DHCP_V6_RELAY_APP); |
| providerService = providerRegistry.register(this); |
| hostService.addListener(hostListener); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| providerRegistry.unregister(this); |
| hostService.removeListener(hostListener); |
| defaultServerInfoList.forEach(this::stopMonitoringIps); |
| defaultServerInfoList.clear(); |
| indirectServerInfoList.forEach(this::stopMonitoringIps); |
| indirectServerInfoList.clear(); |
| } |
| |
| private void stopMonitoringIps(DhcpServerInfo serverInfo) { |
| serverInfo.getDhcpGatewayIp6().ifPresent(gatewayIp -> { |
| hostService.stopMonitoringIp(gatewayIp); |
| }); |
| serverInfo.getDhcpServerIp6().ifPresent(serverIp -> { |
| hostService.stopMonitoringIp(serverIp); |
| }); |
| } |
| |
| @Override |
| public List<DhcpServerInfo> getDefaultDhcpServerInfoList() { |
| return defaultServerInfoList; |
| } |
| |
| @Override |
| public List<DhcpServerInfo> getIndirectDhcpServerInfoList() { |
| return indirectServerInfoList; |
| } |
| |
| @Override |
| public void updateIgnoreVlanConfig(IgnoreDhcpConfig config) { |
| if (config == null) { |
| ignoredVlans.forEach(((deviceId, vlanId) -> { |
| processIgnoreVlanRule(deviceId, vlanId, REMOVE); |
| })); |
| return; |
| } |
| config.ignoredVlans().forEach((deviceId, vlanId) -> { |
| if (ignoredVlans.get(deviceId).contains(vlanId)) { |
| // don't need to process if it already ignored |
| return; |
| } |
| processIgnoreVlanRule(deviceId, vlanId, ADD); |
| }); |
| |
| ignoredVlans.forEach((deviceId, vlanId) -> { |
| if (!config.ignoredVlans().get(deviceId).contains(vlanId)) { |
| // not contains in new config, remove it |
| processIgnoreVlanRule(deviceId, vlanId, REMOVE); |
| } |
| }); |
| } |
| |
| @Override |
| public void removeIgnoreVlanState(IgnoreDhcpConfig config) { |
| if (config == null) { |
| ignoredVlans.clear(); |
| return; |
| } |
| config.ignoredVlans().forEach((deviceId, vlanId) -> { |
| ignoredVlans.remove(deviceId, vlanId); |
| }); |
| } |
| |
| @Override |
| public void processDhcpPacket(PacketContext context, BasePacket payload) { |
| checkNotNull(payload, "DHCP6 payload can't be null"); |
| checkState(payload instanceof DHCP6, "Payload is not a DHCP6"); |
| DHCP6 dhcp6Payload = (DHCP6) payload; |
| Ethernet receivedPacket = context.inPacket().parsed(); |
| |
| if (!configured()) { |
| log.warn("Missing DHCP6 relay server config. Abort packet processing"); |
| log.trace("dhcp6 payload {}", dhcp6Payload); |
| return; |
| } |
| |
| byte msgType = dhcp6Payload.getMsgType(); |
| log.trace("msgType is {}", msgType); |
| |
| ConnectPoint inPort = context.inPacket().receivedFrom(); |
| if (inPort == null) { |
| log.trace("incommin ConnectPoint is null"); |
| } |
| Set<Interface> receivingInterfaces = interfaceService.getInterfacesByPort(inPort); |
| //ignore the packets if dhcp client interface is not configured on onos. |
| if (receivingInterfaces.isEmpty()) { |
| log.warn("Virtual interface is not configured on {}", inPort); |
| return; |
| } |
| |
| |
| if (MSG_TYPE_FROM_CLIENT.contains(msgType)) { |
| |
| InternalPacket ethernetClientPacket = |
| processDhcp6PacketFromClient(context, receivedPacket, receivingInterfaces); |
| if (ethernetClientPacket != null) { |
| forwardPacket(ethernetClientPacket); |
| } |
| |
| } else if (MSG_TYPE_FROM_SERVER.contains(msgType)) { |
| log.trace("calling processDhcp6PacketFromServer with RELAY_REPL", msgType); |
| InternalPacket ethernetPacketReply = |
| processDhcp6PacketFromServer(context, receivedPacket, receivingInterfaces); |
| if (ethernetPacketReply != null) { |
| forwardPacket(ethernetPacketReply); |
| } |
| } else { |
| log.warn("DHCP type {} not supported yet", msgType); |
| } |
| } |
| |
| |
| /** |
| * Checks if this app has been configured. |
| * |
| * @return true if all information we need have been initialized |
| */ |
| public boolean configured() { |
| return !defaultServerInfoList.isEmpty(); |
| } |
| |
| @Override |
| public ProviderId id() { |
| return PROVIDER_ID; |
| } |
| |
| @Override |
| public void triggerProbe(Host host) { |
| // Do nothing here |
| } |
| |
| // the new class the contains Ethernet packet and destination port, kind of like adding |
| // internal header to the packet |
| private class InternalPacket { |
| Ethernet packet; |
| ConnectPoint destLocation; |
| public InternalPacket(Ethernet newPacket, ConnectPoint newLocation) { |
| packet = newPacket; |
| destLocation = newLocation; |
| } |
| void setLocation(ConnectPoint newLocation) { |
| destLocation = newLocation; |
| } |
| } |
| |
| //forward the packet to ConnectPoint where the DHCP server is attached. |
| private void forwardPacket(InternalPacket packet) { |
| //send Packetout to dhcp server connectpoint. |
| if (packet.destLocation != null) { |
| TrafficTreatment t = DefaultTrafficTreatment.builder() |
| .setOutput(packet.destLocation.port()).build(); |
| OutboundPacket o = new DefaultOutboundPacket( |
| packet.destLocation.deviceId(), t, ByteBuffer.wrap(packet.packet.serialize())); |
| if (log.isTraceEnabled()) { |
| log.trace("Relaying packet to destination {}", packet.destLocation); |
| } |
| packetService.emit(o); |
| } // if |
| } |
| |
| /** |
| * Check if the host is directly connected to the network or not. |
| * |
| * @param dhcp6Payload the dhcp6 payload |
| * @return true if the host is directly connected to the network; false otherwise |
| */ |
| private boolean directlyConnected(DHCP6 dhcp6Payload) { |
| log.debug("directlyConnected enters"); |
| |
| if (dhcp6Payload.getMsgType() != DHCP6.MsgType.RELAY_FORW.value() && |
| dhcp6Payload.getMsgType() != DHCP6.MsgType.RELAY_REPL.value()) { |
| log.debug("directlyConnected true. MsgType {}", dhcp6Payload.getMsgType()); |
| |
| return true; |
| } |
| |
| // Regardless of relay-forward or relay-replay, check if we see another relay message |
| DHCP6 dhcp6Payload2 = dhcp6PacketFromRelayPacket(dhcp6Payload); |
| if (dhcp6Payload2 != null) { |
| if (dhcp6Payload.getMsgType() == DHCP6.MsgType.RELAY_FORW.value()) { |
| log.debug("directlyConnected false. 1st realy-foward, 2nd MsgType {}", dhcp6Payload2.getMsgType()); |
| return false; |
| } else { |
| // relay-reply |
| if (dhcp6Payload2.getMsgType() != DHCP6.MsgType.RELAY_REPL.value()) { |
| log.debug("directlyConnected true. 2nd MsgType {}", dhcp6Payload2.getMsgType()); |
| return true; // must be directly connected |
| } else { |
| log.debug("directlyConnected false. 1st relay-reply, 2nd relay-reply MsgType {}", |
| dhcp6Payload2.getMsgType()); |
| return false; // must be indirectly connected |
| } |
| } |
| } else { |
| log.trace("directlyConnected true."); |
| return true; |
| } |
| } |
| |
| /** |
| * extract DHCP6 payload from dhcp6 relay message within relay-forwrd/reply. |
| * |
| * @param dhcp6 dhcp6 relay-reply or relay-foward |
| * @return dhcp6Packet dhcp6 packet extracted from relay-message |
| */ |
| private DHCP6 dhcp6PacketFromRelayPacket(DHCP6 dhcp6) { |
| log.debug("dhcp6PacketFromRelayPacket enters. dhcp6 {}", dhcp6); |
| |
| // extract the relay message if exist |
| DHCP6 dhcp6Payload = dhcp6.getOptions().stream() |
| .filter(opt -> opt instanceof Dhcp6RelayOption) |
| .map(BasePacket::getPayload) |
| .map(pld -> (DHCP6) pld) |
| .findFirst() |
| .orElse(null); |
| |
| |
| if (dhcp6Payload == null) { |
| // Can't find dhcp payload |
| log.debug("Can't find dhcp6 payload from relay message"); |
| } else { |
| log.debug("dhcp6 payload found from relay message {}", dhcp6Payload); |
| } |
| |
| return dhcp6Payload; |
| } |
| |
| /** |
| * find the leaf DHCP6 packet from multi-level relay packet. |
| * |
| * @param relayPacket dhcp6 relay packet |
| * @return leafPacket non-relay dhcp6 packet |
| */ |
| private DHCP6 getDhcp6Leaf(DHCP6 relayPacket) { |
| DHCP6 dhcp6Parent = relayPacket; |
| DHCP6 dhcp6Child = null; |
| |
| log.debug("getDhcp6Leaf entered."); |
| while (dhcp6Parent != null) { |
| dhcp6Child = dhcp6PacketFromRelayPacket(dhcp6Parent); |
| |
| if (dhcp6Child != null) { |
| if (dhcp6Child.getMsgType() != DHCP6.MsgType.RELAY_FORW.value() && |
| dhcp6Child.getMsgType() != DHCP6.MsgType.RELAY_REPL.value()) { |
| log.debug("leaf dhcp6 packet found."); |
| break; |
| } else { |
| // found another relay |
| // go for another loop |
| dhcp6Parent = dhcp6Child; |
| } |
| } else { |
| log.warn("Expected dhcp6 within relay pkt, but no dhcp6 leaf found."); |
| break; |
| } |
| } |
| return dhcp6Child; |
| } |
| |
| /** |
| * check if DHCP6 relay-reply is reply. |
| * |
| * @param relayPacket dhcp6 relay-reply |
| * @return boolean relay-reply contains ack |
| */ |
| private boolean isDhcp6Reply(DHCP6 relayPacket) { |
| log.debug("isDhcp6Reply entered."); |
| |
| DHCP6 leafDhcp6 = getDhcp6Leaf(relayPacket); |
| |
| if (leafDhcp6 != null) { |
| if (leafDhcp6.getMsgType() == DHCP6.MsgType.REPLY.value()) { |
| log.debug("isDhcp6Reply true."); |
| return true; // must be directly connected |
| } else { |
| log.debug("isDhcp6Reply false. leaf dhcp6 is not replay. MsgType {}", leafDhcp6.getMsgType()); |
| } |
| } else { |
| log.debug("isDhcp6Reply false. Expected dhcp6 within relay pkt but not found."); |
| } |
| log.debug("isDhcp6Reply false."); |
| return false; |
| } |
| |
| /** |
| * check if DHCP6 is release or relay-forward contains release. |
| * |
| * @param dhcp6Payload dhcp6 packet |
| * @return boolean dhcp6 contains release |
| */ |
| private boolean isDhcp6Release(DHCP6 dhcp6Payload) { |
| |
| log.debug("isDhcp6Release entered."); |
| |
| if (dhcp6Payload.getMsgType() == DHCP6.MsgType.RELEASE.value()) { |
| log.debug("isDhcp6Release true."); |
| return true; // must be directly connected |
| } else { |
| DHCP6 dhcp6Leaf = getDhcp6Leaf(dhcp6Payload); |
| if (dhcp6Leaf != null) { |
| if (dhcp6Leaf.getMsgType() == DHCP6.MsgType.RELEASE.value()) { |
| log.debug("isDhcp6Release true. indirectlry connected"); |
| return true; |
| } else { |
| log.debug("leaf dhcp6 is not release. MsgType {}", dhcp6Leaf.getMsgType()); |
| return false; |
| } |
| } else { |
| log.debug("isDhcp6Release false. dhcp6 is niether relay nor release."); |
| return false; |
| } |
| } |
| } |
| |
| /** |
| * extract from dhcp6 packet client ipv6 address of given by dhcp server. |
| * |
| * @param dhcp6 the dhcp6 packet |
| * @return Ip6Address Ip6Address given by dhcp server, or null if not exists |
| */ |
| private Ip6Address extractIpAddress(DHCP6 dhcp6) { |
| Ip6Address ip = null; |
| |
| log.debug("extractIpAddress enters dhcp6 {}.", dhcp6); |
| // 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()) { |
| log.debug("Found IPv6 address from iaNaOption {}", iaNaOption); |
| |
| iaAddressOption = iaNaOption.get().getOptions().stream() |
| .filter(opt -> opt instanceof Dhcp6IaAddressOption) |
| .map(opt -> (Dhcp6IaAddressOption) opt) |
| .findFirst(); |
| } else if (iaTaOption.isPresent()) { |
| log.debug("Found IPv6 address from iaTaOption {}", iaTaOption); |
| |
| iaAddressOption = iaTaOption.get().getOptions().stream() |
| .filter(opt -> opt instanceof Dhcp6IaAddressOption) |
| .map(opt -> (Dhcp6IaAddressOption) opt) |
| .findFirst(); |
| } else { |
| iaAddressOption = Optional.empty(); |
| } |
| if (iaAddressOption.isPresent()) { |
| ip = iaAddressOption.get().getIp6Address(); |
| log.debug("Found IPv6 address from iaAddressOption {}", iaAddressOption); |
| |
| |
| } else { |
| log.debug("Can't find IPv6 address from DHCPv6 {}", dhcp6); |
| } |
| |
| return ip; |
| } |
| /** |
| * extract from dhcp6 packet Prefix prefix provided by dhcp server. |
| * |
| * @param dhcp6 the dhcp6 payload |
| * @return IpPrefix Prefix Delegation prefix, or null if not exists. |
| */ |
| private IpPrefix extractPrefix(DHCP6 dhcp6) { |
| log.trace("extractPrefix enters {}", dhcp6); |
| |
| // extract prefix |
| IpPrefix prefixPrefix = null; |
| |
| Ip6Address prefixAddress = null; |
| |
| // Extract IPv6 prefix from IA PD option |
| Optional<Dhcp6IaPdOption> iaPdOption = dhcp6.getOptions() |
| .stream() |
| .filter(opt -> opt instanceof Dhcp6IaPdOption) |
| .map(opt -> (Dhcp6IaPdOption) opt) |
| .findFirst(); |
| |
| Optional<Dhcp6IaPrefixOption> iaPrefixOption; |
| if (iaPdOption.isPresent()) { |
| log.debug("IA_PD option found {}", iaPdOption); |
| |
| iaPrefixOption = iaPdOption.get().getOptions().stream() |
| .filter(opt -> opt instanceof Dhcp6IaPrefixOption) |
| .map(opt -> (Dhcp6IaPrefixOption) opt) |
| .findFirst(); |
| } else { |
| log.debug("IA_PD option NOT found"); |
| |
| iaPrefixOption = Optional.empty(); |
| } |
| if (iaPrefixOption.isPresent()) { |
| log.trace("IAPrefix Option within IA_PD option found {}", iaPrefixOption); |
| |
| prefixAddress = iaPrefixOption.get().getIp6Prefix(); |
| int prefixLen = (int) iaPrefixOption.get().getPrefixLength(); |
| log.debug("Prefix length is {} bits", prefixLen); |
| prefixPrefix = IpPrefix.valueOf(prefixAddress, prefixLen); |
| |
| } else { |
| log.debug("Can't find IPv6 prefix from DHCPv6 {}", dhcp6); |
| } |
| |
| return prefixPrefix; |
| } |
| |
| /** |
| * remove host or route. |
| * |
| * @param directConnFlag flag to show that packet is from directly connected client |
| * @param dhcp6Packet the dhcp6 payload |
| * @param clientPacket client's ethernet packet |
| * @param clientIpv6 client's Ipv6 packet |
| * @param clientInterface client interfaces |
| */ |
| private void removeHostOrRoute(boolean directConnFlag, DHCP6 dhcp6Packet, |
| Ethernet clientPacket, IPv6 clientIpv6, |
| Interface clientInterface) { |
| log.debug("extractPrefix enters {}", dhcp6Packet); |
| VlanId vlanId = clientInterface.vlan(); |
| MacAddress clientMac = clientPacket.getSourceMAC(); |
| log.debug("client mac {} client vlan {}", HexString.toHexString(clientMac.toBytes(), ":"), vlanId); |
| |
| // add host or route |
| if (isDhcp6Release(dhcp6Packet)) { |
| IpAddress ip = null; |
| if (directConnFlag) { |
| // Add to host store if it is connected to network directly |
| ip = extractIpAddress(dhcp6Packet); |
| if (ip != null) { |
| |
| HostId hostId = HostId.hostId(clientMac, vlanId); |
| log.debug("remove Host {} ip for directly connected.", hostId.toString()); |
| // Remove host's ip of when dhcp release msg is received |
| providerService.removeIpFromHost(hostId, ip); |
| } else { |
| log.debug("ipAddress not found. Do not add Host for directly connected."); |
| } |
| } else { |
| // Remove from route store if it is not connected to network directly |
| // pick out the first link-local ip address |
| IpAddress nextHopIp = getFirstIpByHost(clientMac, vlanId); |
| if (nextHopIp == null) { |
| log.warn("Can't find link-local IP address of gateway mac {} vlanId {}", |
| clientMac, vlanId); |
| return; |
| } |
| |
| DHCP6 leafDhcp = getDhcp6Leaf(dhcp6Packet); |
| ip = extractIpAddress(leafDhcp); |
| if (ip == null) { |
| log.debug("ip is null"); |
| } else { |
| Route routeForIP = new Route(Route.Source.STATIC, ip.toIpPrefix(), nextHopIp); |
| log.debug("removing route of 128 address for indirectly connected."); |
| log.debug("128 ip {}, nexthop {}", HexString.toHexString(ip.toOctets(), ":"), |
| HexString.toHexString(nextHopIp.toOctets(), ":")); |
| routeStore.removeRoute(routeForIP); |
| } |
| |
| IpPrefix ipPrefix = extractPrefix(leafDhcp); |
| if (ipPrefix == null) { |
| log.debug("ipPrefix is null "); |
| } else { |
| Route routeForPrefix = new Route(Route.Source.STATIC, ipPrefix, nextHopIp); |
| log.debug("removing route of PD for indirectly connected."); |
| log.debug("pd ip {}, nexthop {}", HexString.toHexString(ipPrefix.address().toOctets(), ":"), |
| HexString.toHexString(nextHopIp.toOctets(), ":")); |
| |
| routeStore.removeRoute(routeForPrefix); |
| } |
| } |
| } |
| } |
| |
| /** |
| * add host or route. |
| * |
| * @param directConnFlag flag to show that packet is from directly connected client |
| * @param dhcp6Relay the dhcp6 payload |
| * @param embeddedDhcp6 client's ethernet packetthe dhcp6 payload within relay |
| * @param clientMac client macAddress |
| * @param clientInterface client interface |
| */ |
| private void addHostOrRoute(boolean directConnFlag, DHCP6 dhcp6Relay, |
| DHCP6 embeddedDhcp6, |
| MacAddress clientMac, |
| Interface clientInterface) { |
| log.debug("addHostOrRoute entered."); |
| VlanId vlanId = clientInterface.vlan(); |
| // add host or route |
| if (isDhcp6Reply(dhcp6Relay)) { |
| IpAddress ip = null; |
| if (directConnFlag) { |
| // Add to host store if it connect to network directly |
| ip = extractIpAddress(embeddedDhcp6); |
| if (ip != null) { |
| Set<IpAddress> ips = Sets.newHashSet(ip); |
| |
| // FIXME: we should use vlan id from original packet (solicit, request) |
| HostId hostId = HostId.hostId(clientMac, vlanId); |
| Host host = hostService.getHost(hostId); |
| HostLocation hostLocation = new HostLocation(clientInterface.connectPoint(), |
| System.currentTimeMillis()); |
| Set<HostLocation> hostLocations = Sets.newHashSet(hostLocation); |
| |
| if (host != null) { |
| // Dual homing support: |
| // if host exists, use old locations and new location |
| hostLocations.addAll(host.locations()); |
| } |
| HostDescription desc = new DefaultHostDescription(clientMac, vlanId, |
| hostLocations, ips, |
| false); |
| log.debug("adding Host for directly connected."); |
| log.debug("client mac {} client vlan {} hostlocation {}", |
| HexString.toHexString(clientMac.toBytes(), ":"), |
| vlanId, hostLocation.toString()); |
| |
| // Replace the ip when dhcp server give the host new ip address |
| providerService.hostDetected(hostId, desc, false); |
| } else { |
| log.debug("ipAddress not found. Do not add Host for directly connected."); |
| } |
| } else { |
| // Add to route store if it does not connect to network directly |
| // pick out the first link-local ip address |
| IpAddress nextHopIp = getFirstIpByHost(clientMac, vlanId); |
| if (nextHopIp == null) { |
| log.warn("Can't find link-local IP address of gateway mac {} vlanId {}", |
| clientMac, vlanId); |
| return; |
| } |
| |
| DHCP6 leafDhcp = getDhcp6Leaf(embeddedDhcp6); |
| ip = extractIpAddress(leafDhcp); |
| if (ip == null) { |
| log.trace("ip is null"); |
| } else { |
| Route routeForIP = new Route(Route.Source.STATIC, ip.toIpPrefix(), nextHopIp); |
| log.trace("adding Route of 128 address for indirectly connected."); |
| routeStore.updateRoute(routeForIP); |
| } |
| |
| IpPrefix ipPrefix = extractPrefix(leafDhcp); |
| if (ipPrefix == null) { |
| log.trace("ipPrefix is null "); |
| } else { |
| Route routeForPrefix = new Route(Route.Source.STATIC, ipPrefix, nextHopIp); |
| log.trace("adding Route of PD for indirectly connected."); |
| routeStore.updateRoute(routeForPrefix); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Build the DHCP6 solicit/request packet with gatewayip. |
| * TODO: method too long, need to be refactored. |
| * |
| * @param context packet context |
| * @param clientPacket client ethernet packet |
| * @param clientInterfaces set of client side interfaces |
| */ |
| private InternalPacket processDhcp6PacketFromClient(PacketContext context, |
| Ethernet clientPacket, Set<Interface> clientInterfaces) { |
| ConnectPoint receivedFrom = context.inPacket().receivedFrom(); |
| DeviceId receivedFromDevice = receivedFrom.deviceId(); |
| DhcpServerInfo serverInfo; |
| Ip6Address dhcpServerIp = null; |
| ConnectPoint dhcpServerConnectPoint = null; |
| MacAddress dhcpConnectMac = null; |
| VlanId dhcpConnectVlan = null; |
| Ip6Address dhcpGatewayIp = null; |
| Ip6Address indirectDhcpServerIp = null; |
| ConnectPoint indirectDhcpServerConnectPoint = null; |
| MacAddress indirectDhcpConnectMac = null; |
| VlanId indirectDhcpConnectVlan = null; |
| Ip6Address indirectDhcpGatewayIp = null; |
| Ip6Address indirectRelayAgentIpFromCfg = null; |
| if (!defaultServerInfoList.isEmpty()) { |
| serverInfo = defaultServerInfoList.get(0); |
| dhcpConnectMac = serverInfo.getDhcpConnectMac().orElse(null); |
| dhcpGatewayIp = serverInfo.getDhcpGatewayIp6().orElse(null); |
| dhcpServerIp = serverInfo.getDhcpServerIp6().orElse(null); |
| dhcpServerConnectPoint = serverInfo.getDhcpServerConnectPoint().orElse(null); |
| dhcpConnectVlan = serverInfo.getDhcpConnectVlan().orElse(null); |
| } |
| if (!indirectServerInfoList.isEmpty()) { |
| serverInfo = indirectServerInfoList.get(0); |
| indirectDhcpConnectMac = serverInfo.getDhcpConnectMac().orElse(null); |
| indirectDhcpGatewayIp = serverInfo.getDhcpGatewayIp6().orElse(null); |
| indirectDhcpServerIp = serverInfo.getDhcpServerIp6().orElse(null); |
| indirectDhcpServerConnectPoint = serverInfo.getDhcpServerConnectPoint().orElse(null); |
| indirectDhcpConnectVlan = serverInfo.getDhcpConnectVlan().orElse(null); |
| indirectRelayAgentIpFromCfg = serverInfo.getRelayAgentIp6(receivedFromDevice).orElse(null); |
| } |
| Ip6Address relayAgentIp = getRelayAgentIPv6Address(clientInterfaces); |
| MacAddress relayAgentMac = clientInterfaces.iterator().next().mac(); |
| if (relayAgentIp == null || relayAgentMac == null) { |
| log.warn("Missing DHCP relay agent interface Ipv6 addr config for " |
| + "packet from client on port: {}. Aborting packet processing", |
| clientInterfaces.iterator().next().connectPoint()); |
| return null; |
| } |
| // get dhcp6 header. |
| IPv6 clientIpv6 = (IPv6) clientPacket.getPayload(); |
| UDP clientUdp = (UDP) clientIpv6.getPayload(); |
| DHCP6 clientDhcp6 = (DHCP6) clientUdp.getPayload(); |
| boolean directConnFlag = directlyConnected(clientDhcp6); |
| Interface serverInterface; |
| if (directConnFlag) { |
| serverInterface = getServerInterface(); |
| } else { |
| serverInterface = getIndirectServerInterface(); |
| if (serverInterface == null) { |
| // Indirect server interface not found, use default server interface |
| serverInterface = getServerInterface(); |
| } |
| } |
| if (serverInterface == null) { |
| log.warn("Can't get {} server interface, ignore", directConnFlag ? "direct" : "indirect"); |
| return null; |
| } |
| Ip6Address ipFacingServer = getFirstIpFromInterface(serverInterface); |
| MacAddress macFacingServer = serverInterface.mac(); |
| if (ipFacingServer == null || macFacingServer == null) { |
| log.warn("No IP v6 address for server Interface {}", serverInterface); |
| return null; |
| } |
| Ethernet etherReply = (Ethernet) clientPacket.clone(); |
| etherReply.setSourceMACAddress(macFacingServer); |
| if ((directConnFlag && dhcpConnectMac == null) || |
| !directConnFlag && indirectDhcpConnectMac == null && dhcpConnectMac == null) { |
| log.trace("Packet received from {} connected client.", directConnFlag ? "directly" : "indirectly"); |
| log.warn("DHCP6 {} not yet resolved .. Aborting DHCP packet processing from client on port: {}", |
| (dhcpGatewayIp == null) ? "server IP " + dhcpServerIp |
| : "gateway IP " + dhcpGatewayIp, |
| clientInterfaces.iterator().next().connectPoint()); |
| return null; |
| } |
| if (dhcpServerConnectPoint == null) { |
| log.warn("DHCP6 server connection point direct {} directConn {} indirectConn {} is not set up yet", |
| directConnFlag, dhcpServerConnectPoint, indirectDhcpServerConnectPoint); |
| |
| return null; |
| } |
| |
| etherReply.setDestinationMACAddress(dhcpConnectMac); |
| etherReply.setVlanID(dhcpConnectVlan.toShort()); |
| |
| IPv6 ipv6Packet = (IPv6) etherReply.getPayload(); |
| byte[] peerAddress = clientIpv6.getSourceAddress(); |
| ipv6Packet.setSourceAddress(ipFacingServer.toOctets()); |
| ipv6Packet.setDestinationAddress(dhcpServerIp.toOctets()); |
| |
| UDP udpPacket = (UDP) ipv6Packet.getPayload(); |
| udpPacket.setSourcePort(UDP.DHCP_V6_SERVER_PORT); |
| DHCP6 dhcp6Packet = (DHCP6) udpPacket.getPayload(); |
| byte[] dhcp6PacketByte = dhcp6Packet.serialize(); |
| |
| // notify onos and quagga to release PD |
| //releasePD(dhcp6Packet); |
| ConnectPoint clientConnectionPoint = context.inPacket().receivedFrom(); |
| VlanId vlanIdInUse = VlanId.vlanId(clientPacket.getVlanID()); |
| Interface clientInterface = interfaceService.getInterfacesByPort(clientConnectionPoint) |
| .stream().filter(iface -> interfaceContainsVlan(iface, vlanIdInUse)) |
| .findFirst().orElse(null); |
| |
| removeHostOrRoute(directConnFlag, dhcp6Packet, clientPacket, clientIpv6, clientInterface); |
| |
| DHCP6 dhcp6Relay = new DHCP6(); |
| dhcp6Relay.setMsgType(DHCP6.MsgType.RELAY_FORW.value()); |
| // link address: server uses the address to identify the link on which the client |
| // is located. |
| if (directConnFlag) { |
| dhcp6Relay.setLinkAddress(relayAgentIp.toOctets()); |
| log.debug("direct connection: relayAgentIp obtained dynamically {}", |
| HexString.toHexString(relayAgentIp.toOctets(), ":")); |
| |
| } else { |
| if (indirectDhcpServerIp == null) { |
| log.debug("indirect DhcpServerIp not available, use default DhcpServerIp {}", |
| HexString.toHexString(dhcpServerIp.toOctets())); |
| } else { |
| // Indirect case, replace destination to indirect dhcp server if exist |
| // Check if mac is obtained for valid server ip |
| if (indirectDhcpConnectMac == null) { |
| log.warn("DHCP6 {} not yet resolved .. Aborting DHCP " |
| + "packet processing from client on port: {}", |
| (indirectDhcpGatewayIp == null) ? "server IP " + indirectDhcpServerIp |
| : "gateway IP " + indirectDhcpGatewayIp, |
| clientInterfaces.iterator().next().connectPoint()); |
| return null; |
| } |
| etherReply.setDestinationMACAddress(indirectDhcpConnectMac); |
| etherReply.setVlanID(indirectDhcpConnectVlan.toShort()); |
| ipv6Packet.setDestinationAddress(indirectDhcpServerIp.toOctets()); |
| |
| } |
| if (indirectRelayAgentIpFromCfg == null) { |
| dhcp6Relay.setLinkAddress(relayAgentIp.toOctets()); |
| log.debug("indirect connection: relayAgentIp NOT availale from config file! Use dynamic. {}", |
| HexString.toHexString(relayAgentIp.toOctets(), ":")); |
| } else { |
| dhcp6Relay.setLinkAddress(indirectRelayAgentIpFromCfg.toOctets()); |
| log.debug("indirect connection: relayAgentIp from config file is available! {}", |
| HexString.toHexString(indirectRelayAgentIpFromCfg.toOctets(), ":")); |
| } |
| } |
| // peer address: address of the client or relay agent from which |
| // the message to be relayed was received. |
| dhcp6Relay.setPeerAddress(peerAddress); |
| List<Dhcp6Option> options = new ArrayList<>(); |
| // directly connected case, hop count is zero; otherwise, hop count + 1 |
| if (directConnFlag) { |
| dhcp6Relay.setHopCount((byte) 0); |
| } else { |
| dhcp6Relay.setHopCount((byte) (dhcp6Packet.getHopCount() + 1)); |
| } |
| // create relay message option |
| Dhcp6Option relayMessage = new Dhcp6Option(); |
| relayMessage.setCode(DHCP6.OptionCode.RELAY_MSG.value()); |
| relayMessage.setLength((short) dhcp6PacketByte.length); |
| relayMessage.setData(dhcp6PacketByte); |
| options.add(relayMessage); |
| // create interfaceId option |
| String inPortString = "-" + context.inPacket().receivedFrom().toString() + ":"; |
| Dhcp6Option interfaceId = new Dhcp6Option(); |
| interfaceId.setCode(DHCP6.OptionCode.INTERFACE_ID.value()); |
| byte[] clientSoureMacBytes = clientPacket.getSourceMACAddress(); |
| byte[] inPortStringBytes = inPortString.getBytes(); |
| byte[] vlanIdBytes = new byte[2]; |
| vlanIdBytes[0] = (byte) (clientPacket.getVlanID() & 0xff); |
| vlanIdBytes[1] = (byte) ((clientPacket.getVlanID() >> 8) & 0xff); |
| byte[] interfaceIdBytes = new byte[clientSoureMacBytes.length + |
| inPortStringBytes.length + vlanIdBytes.length]; |
| log.debug("Length: interfaceIdBytes {} clientSoureMacBytes {} inPortStringBytes {} vlan {}", |
| interfaceIdBytes.length, clientSoureMacBytes.length, inPortStringBytes.length, |
| vlanIdBytes.length); |
| System.arraycopy(clientSoureMacBytes, 0, interfaceIdBytes, 0, clientSoureMacBytes.length); |
| System.arraycopy(inPortStringBytes, 0, interfaceIdBytes, clientSoureMacBytes.length, inPortStringBytes.length); |
| System.arraycopy(vlanIdBytes, 0, interfaceIdBytes, clientSoureMacBytes.length + inPortStringBytes.length, |
| vlanIdBytes.length); |
| interfaceId.setData(interfaceIdBytes); |
| interfaceId.setLength((short) interfaceIdBytes.length); |
| options.add(interfaceId); |
| log.debug("interfaceId write srcMac {} portString {}", |
| HexString.toHexString(clientSoureMacBytes, ":"), inPortString); |
| dhcp6Relay.setOptions(options); |
| udpPacket.setPayload(dhcp6Relay); |
| udpPacket.resetChecksum(); |
| ipv6Packet.setPayload(udpPacket); |
| ipv6Packet.setHopLimit((byte) 64); |
| etherReply.setPayload(ipv6Packet); |
| if (directConnFlag || indirectDhcpServerIp == null) { |
| return new InternalPacket(etherReply, dhcpServerConnectPoint); |
| } else { |
| return new InternalPacket(etherReply, indirectDhcpServerConnectPoint); |
| } |
| } |
| |
| |
| /** |
| * |
| * process the DHCP6 relay-reply packet from dhcp server. |
| * |
| * @param context packet context |
| * @param receivedPacket server ethernet packet |
| * @param recevingInterfaces set of server side interfaces |
| */ |
| private InternalPacket processDhcp6PacketFromServer(PacketContext context, |
| Ethernet receivedPacket, Set<Interface> recevingInterfaces) { |
| |
| ConnectPoint receivedFrom = context.inPacket().receivedFrom(); |
| DeviceId receivedFromDevice = receivedFrom.deviceId(); |
| |
| // TODO: refactor |
| DhcpServerInfo serverInfo; |
| Ip6Address dhcpServerIp = null; |
| ConnectPoint dhcpServerConnectPoint = null; |
| MacAddress dhcpConnectMac = null; |
| VlanId dhcpConnectVlan = null; |
| Ip6Address dhcpGatewayIp = null; |
| |
| Ip6Address indirectDhcpServerIp = null; |
| ConnectPoint indirectDhcpServerConnectPoint = null; |
| MacAddress indirectDhcpConnectMac = null; |
| VlanId indirectDhcpConnectVlan = null; |
| Ip6Address indirectDhcpGatewayIp = null; |
| Ip6Address indirectRelayAgentIpFromCfg = null; |
| |
| if (!defaultServerInfoList.isEmpty()) { |
| serverInfo = defaultServerInfoList.get(0); |
| dhcpConnectMac = serverInfo.getDhcpConnectMac().orElse(null); |
| dhcpGatewayIp = serverInfo.getDhcpGatewayIp6().orElse(null); |
| dhcpServerIp = serverInfo.getDhcpServerIp6().orElse(null); |
| dhcpServerConnectPoint = serverInfo.getDhcpServerConnectPoint().orElse(null); |
| dhcpConnectVlan = serverInfo.getDhcpConnectVlan().orElse(null); |
| } |
| |
| if (!indirectServerInfoList.isEmpty()) { |
| serverInfo = indirectServerInfoList.get(0); |
| indirectDhcpConnectMac = serverInfo.getDhcpConnectMac().orElse(null); |
| indirectDhcpGatewayIp = serverInfo.getDhcpGatewayIp6().orElse(null); |
| indirectDhcpServerIp = serverInfo.getDhcpServerIp6().orElse(null); |
| indirectDhcpServerConnectPoint = serverInfo.getDhcpServerConnectPoint().orElse(null); |
| indirectDhcpConnectVlan = serverInfo.getDhcpConnectVlan().orElse(null); |
| indirectRelayAgentIpFromCfg = serverInfo.getRelayAgentIp6(receivedFromDevice).orElse(null); |
| } |
| |
| // get dhcp6 header. |
| Ethernet etherReply = (Ethernet) receivedPacket.clone(); |
| IPv6 ipv6Packet = (IPv6) etherReply.getPayload(); |
| UDP udpPacket = (UDP) ipv6Packet.getPayload(); |
| DHCP6 dhcp6Relay = (DHCP6) udpPacket.getPayload(); |
| |
| Boolean directConnFlag = directlyConnected(dhcp6Relay); |
| ConnectPoint inPort = context.inPacket().receivedFrom(); |
| if ((directConnFlag || (!directConnFlag && indirectDhcpServerIp == null)) |
| && !inPort.equals(dhcpServerConnectPoint)) { |
| log.warn("Receiving port {} is not the same as server connect point {} for direct or indirect-null", |
| inPort, dhcpServerConnectPoint); |
| return null; |
| } |
| |
| if (!directConnFlag && indirectDhcpServerIp != null && |
| !inPort.equals(indirectDhcpServerConnectPoint)) { |
| log.warn("Receiving port {} is not the same as server connect point {} for indirect", |
| inPort, indirectDhcpServerConnectPoint); |
| return null; |
| } |
| |
| |
| Dhcp6InterfaceIdOption interfaceIdOption = dhcp6Relay.getOptions().stream() |
| .filter(opt -> opt instanceof Dhcp6InterfaceIdOption) |
| .map(opt -> (Dhcp6InterfaceIdOption) opt) |
| .findFirst() |
| .orElse(null); |
| |
| if (interfaceIdOption == null) { |
| log.warn("Interface Id option is not present, abort packet..."); |
| return null; |
| } |
| |
| MacAddress peerMac = interfaceIdOption.getMacAddress(); |
| String clientConnectionPointStr = new String(interfaceIdOption.getInPort()); |
| |
| ConnectPoint clientConnectionPoint = ConnectPoint.deviceConnectPoint(clientConnectionPointStr); |
| VlanId vlanIdInUse = VlanId.vlanId(interfaceIdOption.getVlanId()); |
| Interface clientInterface = interfaceService.getInterfacesByPort(clientConnectionPoint) |
| .stream() |
| .filter(iface -> interfaceContainsVlan(iface, vlanIdInUse)) |
| .findFirst() |
| .orElse(null); |
| if (clientInterface == null) { |
| log.warn("Cannot get client interface for from packet, abort... vlan {}", vlanIdInUse.toString()); |
| return null; |
| } |
| MacAddress relayAgentMac = clientInterface.mac(); |
| if (relayAgentMac == null) { |
| log.warn("Can not get interface mac, abort packet.."); |
| return null; |
| } |
| etherReply.setSourceMACAddress(relayAgentMac); |
| |
| // find destMac |
| MacAddress clientMac = null; |
| Ip6Address peerAddress = Ip6Address.valueOf(dhcp6Relay.getPeerAddress()); |
| Set<Host> clients = hostService.getHostsByIp(peerAddress); |
| if (clients.isEmpty()) { |
| log.debug("There's no host found for this address {}", |
| HexString.toHexString(dhcp6Relay.getPeerAddress(), ":")); |
| log.debug("Let's look up interfaceId {}", HexString.toHexString(peerMac.toBytes(), ":")); |
| clientMac = peerMac; |
| } else { |
| clientMac = clients.iterator().next().mac(); |
| if (clientMac == null) { |
| log.warn("No client mac address found, abort packet..."); |
| return null; |
| } |
| log.trace("Client mac address found from getHostByIp"); |
| } |
| etherReply.setDestinationMACAddress(clientMac); |
| |
| // ip header |
| ipv6Packet.setSourceAddress(dhcp6Relay.getLinkAddress()); |
| ipv6Packet.setDestinationAddress(dhcp6Relay.getPeerAddress()); |
| // udp header |
| udpPacket.setSourcePort(UDP.DHCP_V6_SERVER_PORT); |
| if (directConnFlag) { |
| udpPacket.setDestinationPort(UDP.DHCP_V6_CLIENT_PORT); |
| } else { |
| udpPacket.setDestinationPort(UDP.DHCP_V6_SERVER_PORT); |
| } |
| |
| DHCP6 embeddedDhcp6 = dhcp6Relay.getOptions().stream() |
| .filter(opt -> opt instanceof Dhcp6RelayOption) |
| .map(BasePacket::getPayload) |
| .map(pld -> (DHCP6) pld) |
| .findFirst() |
| .orElse(null); |
| |
| |
| // add host or route |
| addHostOrRoute(directConnFlag, dhcp6Relay, embeddedDhcp6, clientMac, clientInterface); |
| |
| udpPacket.setPayload(embeddedDhcp6); |
| udpPacket.resetChecksum(); |
| ipv6Packet.setPayload(udpPacket); |
| etherReply.setPayload(ipv6Packet); |
| |
| return new InternalPacket(etherReply, clientConnectionPoint); |
| } |
| |
| // Returns the first v6 interface ip out of a set of interfaces or null. |
| // Checks all interfaces, and ignores v6 interface ips |
| private Ip6Address getRelayAgentIPv6Address(Set<Interface> intfs) { |
| for (Interface intf : intfs) { |
| for (InterfaceIpAddress ip : intf.ipAddressesList()) { |
| Ip6Address relayAgentIp = ip.ipAddress().getIp6Address(); |
| if (relayAgentIp != null) { |
| return relayAgentIp; |
| } |
| } |
| } |
| return null; |
| } |
| |
| @Override |
| public void setDefaultDhcpServerConfigs(Collection<DhcpServerConfig> configs) { |
| setDhcpServerConfigs(configs, defaultServerInfoList); |
| } |
| |
| @Override |
| public void setIndirectDhcpServerConfigs(Collection<DhcpServerConfig> configs) { |
| setDhcpServerConfigs(configs, indirectServerInfoList); |
| } |
| |
| public void setDhcpServerConfigs(Collection<DhcpServerConfig> configs, List<DhcpServerInfo> serverInfoList) { |
| if (configs.size() == 0) { |
| // no config to update |
| return; |
| } |
| |
| // TODO: currently we pick up first DHCP server config. |
| // Will use other server configs in the future for HA. |
| DhcpServerConfig serverConfig = configs.iterator().next(); |
| |
| if (!serverConfig.getDhcpServerIp6().isPresent()) { |
| // not a DHCPv6 config |
| return; |
| } |
| |
| if (!serverInfoList.isEmpty()) { |
| // remove old server info |
| DhcpServerInfo oldServerInfo = serverInfoList.remove(0); |
| |
| // stop monitoring gateway or server |
| oldServerInfo.getDhcpGatewayIp6().ifPresent(gatewayIp -> { |
| hostService.stopMonitoringIp(gatewayIp); |
| }); |
| oldServerInfo.getDhcpServerIp6().ifPresent(serverIp -> { |
| hostService.stopMonitoringIp(serverIp); |
| cancelDhcpPacket(serverIp); |
| }); |
| } |
| |
| // Create new server info according to the config |
| DhcpServerInfo newServerInfo = new DhcpServerInfo(serverConfig, |
| DhcpServerInfo.Version.DHCP_V6); |
| checkState(newServerInfo.getDhcpServerConnectPoint().isPresent(), |
| "Connect point not exists"); |
| checkState(newServerInfo.getDhcpServerIp6().isPresent(), |
| "IP of DHCP server not exists"); |
| |
| log.debug("DHCP server connect point: {}", newServerInfo.getDhcpServerConnectPoint().orElse(null)); |
| log.debug("DHCP server IP: {}", newServerInfo.getDhcpServerIp6().orElse(null)); |
| |
| Ip6Address serverIp = newServerInfo.getDhcpServerIp6().get(); |
| Ip6Address ipToProbe; |
| if (newServerInfo.getDhcpGatewayIp6().isPresent()) { |
| ipToProbe = newServerInfo.getDhcpGatewayIp6().get(); |
| } else { |
| ipToProbe = newServerInfo.getDhcpServerIp6().orElse(null); |
| } |
| String hostToProbe = newServerInfo.getDhcpGatewayIp6() |
| .map(ip -> "gateway").orElse("server"); |
| |
| log.debug("Probing to resolve {} IP {}", hostToProbe, ipToProbe); |
| hostService.startMonitoringIp(ipToProbe); |
| |
| Set<Host> hosts = hostService.getHostsByIp(ipToProbe); |
| if (!hosts.isEmpty()) { |
| Host host = hosts.iterator().next(); |
| newServerInfo.setDhcpConnectVlan(host.vlan()); |
| newServerInfo.setDhcpConnectMac(host.mac()); |
| } |
| // Add new server info |
| synchronized (this) { |
| serverInfoList.clear(); |
| serverInfoList.add(0, newServerInfo); |
| } |
| requestDhcpPacket(serverIp); |
| } |
| |
| class InternalHostListener implements HostListener { |
| @Override |
| public void event(HostEvent event) { |
| switch (event.type()) { |
| case HOST_ADDED: |
| case HOST_UPDATED: |
| hostUpdated(event.subject()); |
| break; |
| case HOST_REMOVED: |
| hostRemoved(event.subject()); |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| |
| /** |
| * Handle host updated. |
| * If the host is DHCP server or gateway, update connect mac and vlan. |
| * |
| * @param host the host |
| */ |
| private void hostUpdated(Host host) { |
| hostUpdated(host, defaultServerInfoList); |
| hostUpdated(host, indirectServerInfoList); |
| } |
| |
| private void hostUpdated(Host host, List<DhcpServerInfo> serverInfoList) { |
| DhcpServerInfo serverInfo; |
| Ip6Address targetIp; |
| if (!serverInfoList.isEmpty()) { |
| serverInfo = serverInfoList.get(0); |
| Ip6Address serverIp = serverInfo.getDhcpServerIp6().orElse(null); |
| targetIp = serverInfo.getDhcpGatewayIp6().orElse(null); |
| |
| if (targetIp == null) { |
| targetIp = serverIp; |
| } |
| |
| if (targetIp != null) { |
| if (host.ipAddresses().contains(targetIp)) { |
| serverInfo.setDhcpConnectMac(host.mac()); |
| serverInfo.setDhcpConnectVlan(host.vlan()); |
| requestDhcpPacket(serverIp); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Handle host removed. |
| * If the host is DHCP server or gateway, unset connect mac and vlan. |
| * |
| * @param host the host |
| */ |
| private void hostRemoved(Host host) { |
| hostRemoved(host, defaultServerInfoList); |
| hostRemoved(host, indirectServerInfoList); |
| } |
| |
| private void hostRemoved(Host host, List<DhcpServerInfo> serverInfoList) { |
| DhcpServerInfo serverInfo; |
| Ip6Address targetIp; |
| |
| if (!serverInfoList.isEmpty()) { |
| serverInfo = serverInfoList.get(0); |
| Ip6Address serverIp = serverInfo.getDhcpServerIp6().orElse(null); |
| targetIp = serverInfo.getDhcpGatewayIp6().orElse(null); |
| |
| if (targetIp == null) { |
| targetIp = serverIp; |
| } |
| |
| if (targetIp != null) { |
| if (host.ipAddresses().contains(targetIp)) { |
| serverInfo.setDhcpConnectVlan(null); |
| serverInfo.setDhcpConnectMac(null); |
| cancelDhcpPacket(serverIp); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Returns the first interface ip from interface. |
| * |
| * @param iface interface of one connect point |
| * @return the first interface IP; null if not exists an IP address in |
| * these interfaces |
| */ |
| private Ip6Address getFirstIpFromInterface(Interface iface) { |
| checkNotNull(iface, "Interface can't be null"); |
| return iface.ipAddressesList().stream() |
| .map(InterfaceIpAddress::ipAddress) |
| .filter(IpAddress::isIp6) |
| .map(IpAddress::getIp6Address) |
| .findFirst() |
| .orElse(null); |
| } |
| |
| /** |
| * Gets Interface facing to the server for default host. |
| * |
| * @return the Interface facing to the server; null if not found |
| */ |
| private Interface getServerInterface() { |
| DhcpServerInfo serverInfo; |
| ConnectPoint dhcpServerConnectPoint; |
| VlanId dhcpConnectVlan; |
| |
| if (!defaultServerInfoList.isEmpty()) { |
| serverInfo = defaultServerInfoList.get(0); |
| dhcpServerConnectPoint = serverInfo.getDhcpServerConnectPoint().orElse(null); |
| dhcpConnectVlan = serverInfo.getDhcpConnectVlan().orElse(null); |
| } else { |
| return null; |
| } |
| if (dhcpServerConnectPoint == null || dhcpConnectVlan == null) { |
| log.info("Default DHCP server {} not resolve yet", serverInfo.getDhcpGatewayIp6()); |
| return null; |
| } |
| return interfaceService.getInterfacesByPort(dhcpServerConnectPoint) |
| .stream() |
| .filter(iface -> interfaceContainsVlan(iface, dhcpConnectVlan)) |
| .findFirst() |
| .orElse(null); |
| } |
| |
| /** |
| * Gets Interface facing to the server for indirect hosts. |
| * Use default server Interface if indirect server not configured. |
| * |
| * @return the Interface facing to the server; null if not found |
| */ |
| private Interface getIndirectServerInterface() { |
| DhcpServerInfo serverInfo; |
| |
| ConnectPoint indirectDhcpServerConnectPoint; |
| VlanId indirectDhcpConnectVlan; |
| |
| if (!indirectServerInfoList.isEmpty()) { |
| serverInfo = indirectServerInfoList.get(0); |
| indirectDhcpServerConnectPoint = serverInfo.getDhcpServerConnectPoint().orElse(null); |
| indirectDhcpConnectVlan = serverInfo.getDhcpConnectVlan().orElse(null); |
| } else { |
| return getServerInterface(); |
| } |
| if (indirectDhcpServerConnectPoint == null || indirectDhcpConnectVlan == null) { |
| log.info("Indirect DHCP server {} not resolve yet", serverInfo.getDhcpGatewayIp6()); |
| return null; |
| } |
| return interfaceService.getInterfacesByPort(indirectDhcpServerConnectPoint) |
| .stream() |
| .filter(iface -> interfaceContainsVlan(iface, indirectDhcpConnectVlan)) |
| .findFirst() |
| .orElse(null); |
| } |
| |
| /** |
| * Determind if an Interface contains a vlan id. |
| * |
| * @param iface the Interface |
| * @param vlanId the vlan id |
| * @return true if the Interface contains the vlan id |
| */ |
| private boolean interfaceContainsVlan(Interface iface, VlanId vlanId) { |
| if (vlanId.equals(VlanId.NONE)) { |
| // untagged packet, check if vlan untagged or vlan native is not NONE |
| return !iface.vlanUntagged().equals(VlanId.NONE) || |
| !iface.vlanNative().equals(VlanId.NONE); |
| } |
| // tagged packet, check if the interface contains the vlan |
| return iface.vlanTagged().contains(vlanId); |
| } |
| |
| private void requestDhcpPacket(Ip6Address serverIp) { |
| requestServerDhcpPacket(serverIp); |
| requestClientDhcpPacket(serverIp); |
| } |
| |
| private void cancelDhcpPacket(Ip6Address serverIp) { |
| cancelServerDhcpPacket(serverIp); |
| cancelClientDhcpPacket(serverIp); |
| } |
| |
| private void cancelServerDhcpPacket(Ip6Address serverIp) { |
| TrafficSelector serverSelector = |
| DefaultTrafficSelector.builder(SERVER_RELAY_SELECTOR) |
| .matchIPv6Src(serverIp.toIpPrefix()) |
| .build(); |
| packetService.cancelPackets(serverSelector, |
| PacketPriority.CONTROL, |
| appId); |
| } |
| |
| private void requestServerDhcpPacket(Ip6Address serverIp) { |
| TrafficSelector serverSelector = |
| DefaultTrafficSelector.builder(SERVER_RELAY_SELECTOR) |
| .matchIPv6Src(serverIp.toIpPrefix()) |
| .build(); |
| packetService.requestPackets(serverSelector, |
| PacketPriority.CONTROL, |
| appId); |
| } |
| |
| private void cancelClientDhcpPacket(Ip6Address serverIp) { |
| // Packet comes from relay |
| TrafficSelector indirectClientSelector = |
| DefaultTrafficSelector.builder(SERVER_RELAY_SELECTOR) |
| .matchIPv6Dst(serverIp.toIpPrefix()) |
| .build(); |
| packetService.cancelPackets(indirectClientSelector, |
| PacketPriority.CONTROL, |
| appId); |
| indirectClientSelector = |
| DefaultTrafficSelector.builder(SERVER_RELAY_SELECTOR) |
| .matchIPv6Dst(Ip6Address.ALL_DHCP_RELAY_AGENTS_AND_SERVERS.toIpPrefix()) |
| .build(); |
| packetService.cancelPackets(indirectClientSelector, |
| PacketPriority.CONTROL, |
| appId); |
| indirectClientSelector = |
| DefaultTrafficSelector.builder(SERVER_RELAY_SELECTOR) |
| .matchIPv6Dst(Ip6Address.ALL_DHCP_SERVERS.toIpPrefix()) |
| .build(); |
| packetService.cancelPackets(indirectClientSelector, |
| PacketPriority.CONTROL, |
| appId); |
| |
| // Packet comes from client |
| packetService.cancelPackets(CLIENT_SERVER_SELECTOR, |
| PacketPriority.CONTROL, |
| appId); |
| } |
| |
| private void requestClientDhcpPacket(Ip6Address serverIp) { |
| // Packet comes from relay |
| TrafficSelector indirectClientSelector = |
| DefaultTrafficSelector.builder(SERVER_RELAY_SELECTOR) |
| .matchIPv6Dst(serverIp.toIpPrefix()) |
| .build(); |
| packetService.requestPackets(indirectClientSelector, |
| PacketPriority.CONTROL, |
| appId); |
| indirectClientSelector = |
| DefaultTrafficSelector.builder(SERVER_RELAY_SELECTOR) |
| .matchIPv6Dst(Ip6Address.ALL_DHCP_RELAY_AGENTS_AND_SERVERS.toIpPrefix()) |
| .build(); |
| packetService.requestPackets(indirectClientSelector, |
| PacketPriority.CONTROL, |
| appId); |
| indirectClientSelector = |
| DefaultTrafficSelector.builder(SERVER_RELAY_SELECTOR) |
| .matchIPv6Dst(Ip6Address.ALL_DHCP_SERVERS.toIpPrefix()) |
| .build(); |
| packetService.requestPackets(indirectClientSelector, |
| PacketPriority.CONTROL, |
| appId); |
| |
| // Packet comes from client |
| packetService.requestPackets(CLIENT_SERVER_SELECTOR, |
| PacketPriority.CONTROL, |
| appId); |
| } |
| |
| /** |
| * Process the ignore rules. |
| * |
| * @param deviceId the device id |
| * @param vlanId the vlan to be ignored |
| * @param op the operation, ADD to install; REMOVE to uninstall rules |
| */ |
| private void processIgnoreVlanRule(DeviceId deviceId, VlanId vlanId, Objective.Operation op) { |
| AtomicInteger installedCount = new AtomicInteger(DHCP_SELECTORS.size()); |
| DHCP_SELECTORS.forEach(trafficSelector -> { |
| TrafficSelector selector = DefaultTrafficSelector.builder(trafficSelector) |
| .matchVlanId(vlanId) |
| .build(); |
| |
| ForwardingObjective.Builder builder = DefaultForwardingObjective.builder() |
| .withFlag(ForwardingObjective.Flag.VERSATILE) |
| .withSelector(selector) |
| .withPriority(IGNORE_CONTROL_PRIORITY) |
| .withTreatment(DefaultTrafficTreatment.emptyTreatment()) |
| .fromApp(appId); |
| |
| |
| ObjectiveContext objectiveContext = new ObjectiveContext() { |
| @Override |
| public void onSuccess(Objective objective) { |
| log.info("Ignore rule {} (Vlan id {}, device {}, selector {})", |
| op, vlanId, deviceId, selector); |
| int countDown = installedCount.decrementAndGet(); |
| if (countDown != 0) { |
| return; |
| } |
| switch (op) { |
| case ADD: |
| ignoredVlans.put(deviceId, vlanId); |
| break; |
| case REMOVE: |
| ignoredVlans.remove(deviceId, vlanId); |
| break; |
| default: |
| log.warn("Unsupported objective operation {}", op); |
| break; |
| } |
| } |
| |
| @Override |
| public void onError(Objective objective, ObjectiveError error) { |
| log.warn("Can't {} ignore rule (vlan id {}, selector {}, device {}) due to {}", |
| op, vlanId, selector, deviceId, error); |
| } |
| }; |
| |
| ForwardingObjective fwd; |
| switch (op) { |
| case ADD: |
| fwd = builder.add(objectiveContext); |
| break; |
| case REMOVE: |
| fwd = builder.remove(objectiveContext); |
| break; |
| default: |
| log.warn("Unsupported objective operation {}", op); |
| return; |
| } |
| |
| Device device = deviceService.getDevice(deviceId); |
| if (device == null || !device.is(Pipeliner.class)) { |
| log.warn("Device {} is not available now, wait until device is available", deviceId); |
| return; |
| } |
| flowObjectiveService.apply(deviceId, fwd); |
| }); |
| } |
| |
| /** |
| * Find first ipaddress for a given Host info i.e. mac and vlan. |
| * |
| * @param clientMac client mac |
| * @param vlanId packet's vlan |
| * @return next-hop link-local ipaddress for a given host |
| */ |
| private IpAddress getFirstIpByHost(MacAddress clientMac, VlanId vlanId) { |
| IpAddress nextHopIp; |
| // pick out the first link-local ip address |
| HostId gwHostId = HostId.hostId(clientMac, vlanId); |
| Host gwHost = hostService.getHost(gwHostId); |
| if (gwHost == null) { |
| log.warn("Can't find gateway host for hostId {}", gwHostId); |
| return null; |
| } |
| nextHopIp = gwHost.ipAddresses() |
| .stream() |
| .filter(IpAddress::isIp6) |
| .filter(IpAddress::isLinkLocal) |
| .map(IpAddress::getIp6Address) |
| .findFirst() |
| .orElse(null); |
| return nextHopIp; |
| } |
| } |