| /* |
| * Copyright 2016-present 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.pim.impl; |
| |
| import org.onlab.packet.Ethernet; |
| import org.onlab.packet.IPv4; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.PIM; |
| import org.slf4j.Logger; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * This class will process PIM packets. |
| */ |
| public class PimPacketHandler { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| /** |
| * Constructor for this class. |
| */ |
| public PimPacketHandler() { |
| } |
| |
| /** |
| * Sanitize and process the packet. |
| * TODO: replace ConnectPoint with PIMInterface when PIMInterface has been added. |
| * |
| * @param ethPkt the packet starting with the Ethernet header. |
| * @param pimi the PIM Interface the packet arrived on. |
| */ |
| public void processPacket(Ethernet ethPkt, PimInterface pimi) { |
| checkNotNull(ethPkt); |
| checkNotNull(pimi); |
| |
| // Sanitize the ethernet header to ensure it is IPv4. IPv6 we'll deal with later |
| if (ethPkt.getEtherType() != Ethernet.TYPE_IPV4) { |
| return; |
| } |
| |
| // Get the IP header |
| IPv4 ip = (IPv4) ethPkt.getPayload(); |
| if (ip.getProtocol() != IPv4.PROTOCOL_PIM) { |
| return; |
| } |
| |
| // Get the address of our the neighbor that sent this packet to us. |
| IpAddress nbraddr = IpAddress.valueOf(ip.getDestinationAddress()); |
| if (log.isTraceEnabled()) { |
| log.trace("Packet {} received on port {}", nbraddr, pimi); |
| } |
| |
| // Get the PIM header |
| PIM pim = (PIM) ip.getPayload(); |
| checkNotNull(pim); |
| |
| // Process the pim packet |
| switch (pim.getPimMsgType()) { |
| case PIM.TYPE_HELLO: |
| pimi.processHello(ethPkt); |
| break; |
| case PIM.TYPE_JOIN_PRUNE_REQUEST: |
| pimi.processJoinPrune(ethPkt); |
| log.debug("Received a PIM Join/Prune message"); |
| break; |
| default: |
| log.debug("Received unsupported PIM type: {}", pim.getPimMsgType()); |
| break; |
| } |
| } |
| } |