alshabib | eff0054 | 2015-09-23 13:22:33 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2015 Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.igmp.impl; |
| 17 | |
| 18 | import static org.slf4j.LoggerFactory.getLogger; |
| 19 | |
| 20 | import org.apache.felix.scr.annotations.Activate; |
| 21 | import org.apache.felix.scr.annotations.Component; |
| 22 | import org.apache.felix.scr.annotations.Deactivate; |
| 23 | import org.apache.felix.scr.annotations.Reference; |
| 24 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 25 | import org.onlab.packet.Ethernet; |
| 26 | import org.onlab.packet.IPv4; |
| 27 | import org.onlab.packet.Ip4Address; |
| 28 | import org.onlab.packet.IpAddress; |
| 29 | import org.onlab.packet.IpPrefix; |
| 30 | import org.onlab.packet.IGMP; |
| 31 | import org.onosproject.core.ApplicationId; |
| 32 | import org.onosproject.core.CoreService; |
| 33 | import org.onosproject.net.flow.DefaultTrafficSelector; |
| 34 | import org.onosproject.net.flow.TrafficSelector; |
| 35 | import org.onosproject.net.packet.InboundPacket; |
| 36 | import org.onosproject.net.packet.PacketContext; |
| 37 | import org.onosproject.net.packet.PacketPriority; |
| 38 | import org.onosproject.net.packet.PacketProcessor; |
| 39 | import org.onosproject.net.packet.PacketService; |
| 40 | import org.slf4j.Logger; |
| 41 | |
| 42 | /** |
| 43 | * Internet Group Management Protocol. |
| 44 | */ |
| 45 | @Component(immediate = true) |
| 46 | public class IGMPComponent { |
| 47 | private final Logger log = getLogger(getClass()); |
| 48 | |
| 49 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 50 | protected PacketService packetService; |
| 51 | |
| 52 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 53 | protected CoreService coreService; |
| 54 | |
| 55 | private IGMPPacketProcessor processor = new IGMPPacketProcessor(); |
| 56 | private static ApplicationId appId; |
| 57 | |
| 58 | @Activate |
| 59 | public void activate() { |
| 60 | appId = coreService.registerApplication("org.onosproject.igmp"); |
| 61 | |
| 62 | packetService.addProcessor(processor, PacketProcessor.director(1)); |
| 63 | |
| 64 | // Build a traffic selector for all multicast traffic |
| 65 | TrafficSelector.Builder selector = DefaultTrafficSelector.builder(); |
| 66 | selector.matchEthType(Ethernet.TYPE_IPV4); |
| 67 | selector.matchIPProtocol(IPv4.PROTOCOL_IGMP); |
| 68 | packetService.requestPackets(selector.build(), PacketPriority.REACTIVE, appId); |
| 69 | |
| 70 | log.info("Started"); |
| 71 | } |
| 72 | |
| 73 | @Deactivate |
| 74 | public void deactivate() { |
| 75 | packetService.removeProcessor(processor); |
| 76 | processor = null; |
| 77 | log.info("Stopped"); |
| 78 | } |
| 79 | |
| 80 | /** |
| 81 | * Packet processor responsible for handling IGMP packets. |
| 82 | */ |
| 83 | private class IGMPPacketProcessor implements PacketProcessor { |
| 84 | |
| 85 | @Override |
| 86 | public void process(PacketContext context) { |
| 87 | // Stop processing if the packet has been handled, since we |
| 88 | // can't do any more to it. |
| 89 | if (context.isHandled()) { |
| 90 | return; |
| 91 | } |
| 92 | |
| 93 | InboundPacket pkt = context.inPacket(); |
| 94 | Ethernet ethPkt = pkt.parsed(); |
| 95 | if (ethPkt == null) { |
| 96 | return; |
| 97 | } |
| 98 | |
| 99 | /* |
| 100 | * IPv6 MLD packets are handled by ICMP6. We'll only deal |
| 101 | * with IPv4. |
| 102 | */ |
| 103 | if (ethPkt.getEtherType() != Ethernet.TYPE_IPV4) { |
| 104 | return; |
| 105 | } |
| 106 | |
| 107 | IPv4 ip = (IPv4) ethPkt.getPayload(); |
| 108 | IpAddress gaddr = IpAddress.valueOf(ip.getDestinationAddress()); |
| 109 | IpAddress saddr = Ip4Address.valueOf(ip.getSourceAddress()); |
| 110 | log.debug("Packet (" + saddr.toString() + ", " + gaddr.toString() + |
| 111 | "\tingress port: " + context.inPacket().receivedFrom().toString()); |
| 112 | |
| 113 | if (ip.getProtocol() != IPv4.PROTOCOL_IGMP) { |
Rusty Eddy | 158d5d8 | 2015-10-12 16:59:04 -0700 | [diff] [blame] | 114 | log.debug("IGMP Picked up a non IGMP packet."); |
alshabib | eff0054 | 2015-09-23 13:22:33 -0700 | [diff] [blame] | 115 | return; |
| 116 | } |
| 117 | |
| 118 | IpPrefix mcast = IpPrefix.valueOf("224.0.0.0/4"); |
| 119 | if (!mcast.contains(gaddr)) { |
Rusty Eddy | 158d5d8 | 2015-10-12 16:59:04 -0700 | [diff] [blame] | 120 | log.debug("IGMP Picked up a non multicast packet."); |
alshabib | eff0054 | 2015-09-23 13:22:33 -0700 | [diff] [blame] | 121 | return; |
| 122 | } |
| 123 | |
| 124 | if (mcast.contains(saddr)) { |
Rusty Eddy | 158d5d8 | 2015-10-12 16:59:04 -0700 | [diff] [blame] | 125 | log.debug("IGMP Picked up a packet with a multicast source address."); |
alshabib | eff0054 | 2015-09-23 13:22:33 -0700 | [diff] [blame] | 126 | return; |
| 127 | } |
| 128 | IpPrefix spfx = IpPrefix.valueOf(saddr, 32); |
| 129 | IpPrefix gpfx = IpPrefix.valueOf(gaddr, 32); |
| 130 | |
| 131 | IGMP igmp = (IGMP) ip.getPayload(); |
| 132 | switch (igmp.getIgmpType()) { |
| 133 | |
| 134 | case IGMP.TYPE_IGMPV3_MEMBERSHIP_REPORT: |
| 135 | IGMPProcessMembership.processMembership(igmp, pkt.receivedFrom()); |
| 136 | break; |
| 137 | |
| 138 | case IGMP.TYPE_IGMPV3_MEMBERSHIP_QUERY: |
| 139 | IGMPProcessQuery.processQuery(igmp, pkt.receivedFrom()); |
| 140 | break; |
| 141 | |
| 142 | case IGMP.TYPE_IGMPV1_MEMBERSHIP_REPORT: |
| 143 | case IGMP.TYPE_IGMPV2_MEMBERSHIP_REPORT: |
| 144 | case IGMP.TYPE_IGMPV2_LEAVE_GROUP: |
| 145 | log.debug("IGMP version 1 & 2 message types are not currently supported. Message type: " + |
| 146 | igmp.getIgmpType()); |
| 147 | break; |
| 148 | |
| 149 | default: |
| 150 | log.debug("Unkown IGMP message type: " + igmp.getIgmpType()); |
| 151 | break; |
| 152 | } |
| 153 | } |
| 154 | } |
| 155 | } |