1 files changed, 155 insertions, 0 deletions
diff --git a/framework/src/onos/apps/igmp/src/main/java/org/onosproject/igmp/impl/IGMPComponent.java b/framework/src/onos/apps/igmp/src/main/java/org/onosproject/igmp/impl/IGMPComponent.java
new file mode 100644
index 00000000..ae539c62
--- /dev/null
+++ b/framework/src/onos/apps/igmp/src/main/java/org/onosproject/igmp/impl/IGMPComponent.java
@@ -0,0 +1,155 @@
+/*
+ * 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.impl;
+
+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.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.flow.DefaultTrafficSelector;
+import org.onosproject.net.flow.TrafficSelector;
+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;
+
+/**
+ * Internet Group Management Protocol.
+ */
+@Component(immediate = true)
+public class IGMPComponent {
+    private final Logger log = getLogger(getClass());
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected PacketService packetService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected CoreService coreService;
+
+    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));
+
+        // Build a traffic selector for all multicast traffic
+        TrafficSelector.Builder selector = DefaultTrafficSelector.builder();
+        selector.matchEthType(Ethernet.TYPE_IPV4);
+        selector.matchIPProtocol(IPv4.PROTOCOL_IGMP);
+        packetService.requestPackets(selector.build(), PacketPriority.REACTIVE, appId);
+
+        log.info("Started");
+    }
+
+    @Deactivate
+    public void deactivate() {
+        packetService.removeProcessor(processor);
+        processor = null;
+        log.info("Stopped");
+    }
+
+    /**
+     * 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 (" + saddr.toString() + ", " + gaddr.toString() +
+                    "\tingress port: " + context.inPacket().receivedFrom().toString());
+
+            if (ip.getProtocol() != IPv4.PROTOCOL_IGMP) {
+                log.error("IGMP Picked up a non IGMP packet.");
+                return;
+            }
+
+            IpPrefix mcast = IpPrefix.valueOf("224.0.0.0/4");
+            if (!mcast.contains(gaddr)) {
+                log.error("IGMP Picked up a non multicast packet.");
+                return;
+            }
+
+            if (mcast.contains(saddr)) {
+                log.error("IGMP Picked up a packet with a multicast source address.");
+                return;
+            }
+            IpPrefix spfx = IpPrefix.valueOf(saddr, 32);
+            IpPrefix gpfx = IpPrefix.valueOf(gaddr, 32);
+
+            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:
+                    IGMPProcessQuery.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;
+            }
+        }
+    }
+}