| /* |
| * Copyright 2015 Open Networking Laboratory |
| * |
| * 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.igmp; |
| |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| 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.Property; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.onlab.packet.Ethernet; |
| import org.onlab.packet.IPv4; |
| import org.onlab.packet.Ip4Address; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.IpPrefix; |
| import org.onlab.packet.IGMP; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.core.CoreService; |
| import org.onosproject.net.ConnectPoint; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.net.config.NetworkConfigRegistry; |
| import org.onosproject.net.flow.DefaultTrafficSelector; |
| import org.onosproject.net.flow.TrafficSelector; |
| import org.onosproject.net.mcast.McastRoute; |
| import org.onosproject.net.mcast.MulticastRouteService; |
| import org.onosproject.net.packet.InboundPacket; |
| 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.slf4j.Logger; |
| |
| import java.util.Optional; |
| |
| /** |
| * Internet Group Management Protocol. |
| */ |
| @Component(immediate = true) |
| public class IgmpSnoop { |
| private final Logger log = getLogger(getClass()); |
| |
| private static final String DEFAULT_MCAST_ADDR = "224.0.0.0/4"; |
| |
| @Property(name = "multicastAddress", |
| label = "Define the multicast base raneg to listen to") |
| private String multicastAddress = DEFAULT_MCAST_ADDR; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected PacketService packetService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected NetworkConfigRegistry networkConfig; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected MulticastRouteService multicastService; |
| |
| private IgmpPacketProcessor processor = new IgmpPacketProcessor(); |
| private static ApplicationId appId; |
| |
| @Activate |
| public void activate() { |
| appId = coreService.registerApplication("org.onosproject.igmp"); |
| |
| packetService.addProcessor(processor, PacketProcessor.director(1)); |
| |
| networkConfig.getSubjects(DeviceId.class, IgmpDeviceConfig.class).forEach( |
| subject -> { |
| IgmpDeviceConfig config = networkConfig.getConfig(subject, |
| IgmpDeviceConfig.class); |
| if (config != null) { |
| IgmpDeviceData data = config.getDevice(); |
| submitPacketRequests(data.deviceId()); |
| } |
| } |
| ); |
| |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| packetService.removeProcessor(processor); |
| processor = null; |
| log.info("Stopped"); |
| } |
| |
| private void submitPacketRequests(DeviceId deviceId) { |
| TrafficSelector.Builder selector = DefaultTrafficSelector.builder(); |
| selector.matchEthType(Ethernet.TYPE_IPV4); |
| selector.matchIPProtocol(IPv4.PROTOCOL_IGMP); |
| packetService.requestPackets(selector.build(), |
| PacketPriority.REACTIVE, |
| appId, |
| Optional.of(deviceId)); |
| |
| } |
| |
| /** |
| * Packet processor responsible for handling IGMP packets. |
| */ |
| private class IgmpPacketProcessor implements PacketProcessor { |
| |
| @Override |
| public void process(PacketContext context) { |
| // Stop processing if the packet has been handled, since we |
| // can't do any more to it. |
| if (context.isHandled()) { |
| return; |
| } |
| |
| InboundPacket pkt = context.inPacket(); |
| Ethernet ethPkt = pkt.parsed(); |
| if (ethPkt == null) { |
| return; |
| } |
| |
| /* |
| * IPv6 MLD packets are handled by ICMP6. We'll only deal |
| * with IPv4. |
| */ |
| if (ethPkt.getEtherType() != Ethernet.TYPE_IPV4) { |
| return; |
| } |
| |
| IPv4 ip = (IPv4) ethPkt.getPayload(); |
| IpAddress gaddr = IpAddress.valueOf(ip.getDestinationAddress()); |
| IpAddress saddr = Ip4Address.valueOf(ip.getSourceAddress()); |
| log.debug("Packet ({}, {}) -> ingress port: {}", saddr, gaddr, |
| context.inPacket().receivedFrom()); |
| |
| |
| if (ip.getProtocol() != IPv4.PROTOCOL_IGMP) { |
| log.debug("IGMP Picked up a non IGMP packet."); |
| return; |
| } |
| |
| IpPrefix mcast = IpPrefix.valueOf(DEFAULT_MCAST_ADDR); |
| if (!mcast.contains(gaddr)) { |
| log.debug("IGMP Picked up a non multicast packet."); |
| return; |
| } |
| |
| if (mcast.contains(saddr)) { |
| log.debug("IGMP Picked up a packet with a multicast source address."); |
| return; |
| } |
| |
| IGMP igmp = (IGMP) ip.getPayload(); |
| switch (igmp.getIgmpType()) { |
| |
| case IGMP.TYPE_IGMPV3_MEMBERSHIP_REPORT: |
| IGMPProcessMembership.processMembership(igmp, pkt.receivedFrom()); |
| break; |
| |
| case IGMP.TYPE_IGMPV3_MEMBERSHIP_QUERY: |
| processQuery(igmp, pkt.receivedFrom()); |
| break; |
| |
| case IGMP.TYPE_IGMPV1_MEMBERSHIP_REPORT: |
| case IGMP.TYPE_IGMPV2_MEMBERSHIP_REPORT: |
| case IGMP.TYPE_IGMPV2_LEAVE_GROUP: |
| log.debug("IGMP version 1 & 2 message types are not currently supported. Message type: " + |
| igmp.getIgmpType()); |
| break; |
| |
| default: |
| log.debug("Unkown IGMP message type: " + igmp.getIgmpType()); |
| break; |
| } |
| } |
| } |
| |
| private void processQuery(IGMP pkt, ConnectPoint location) { |
| pkt.getGroups().forEach(group -> group.getSources().forEach(src -> { |
| |
| McastRoute route = new McastRoute(src, |
| group.getGaddr(), |
| McastRoute.Type.IGMP); |
| multicastService.add(route); |
| multicastService.addSink(route, location); |
| |
| })); |
| } |
| } |