arphandler/src/main/java/org/opendaylight/l2switch/arphandler/core/ArpPacketHandler.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.l2switch.arphandler.core;
   9
  10 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.arp.rev140528.ArpPacketListener;
  11 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.arp.rev140528.ArpPacketReceived;
  12 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.arp.rev140528.arp.packet.received.packet.chain.packet.ArpPacket;
  13 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.basepacket.rev140528.packet.chain.grp.PacketChain;
  14 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.basepacket.rev140528.packet.chain.grp.packet.chain.packet.RawPacket;
  15 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.ethernet.rev140528.ethernet.packet.received.packet.chain.packet.EthernetPacket;
  16
  17 /**
  18  * ArpPacketHandler listens for incoming ARP packets and processes them.
  19  */
  20 public class ArpPacketHandler implements ArpPacketListener {
  21
  22     private final PacketDispatcher packetDispatcher;
  23
  24     public ArpPacketHandler(PacketDispatcher packetDispatcher) {
  25         this.packetDispatcher = packetDispatcher;
  26     }
  27
  28     /**
  29      * The handler function for ARP packets.
  30      *
  31      * @param packetReceived
  32      *            The incoming packet.
  33      */
  34     @Override
  35     public void onArpPacketReceived(ArpPacketReceived packetReceived) {
  36         if (packetReceived == null || packetReceived.getPacketChain() == null) {
  37             return;
  38         }
  39
  40         RawPacket rawPacket = null;
  41         EthernetPacket ethernetPacket = null;
  42         ArpPacket arpPacket = null;
  43         for (PacketChain packetChain : packetReceived.getPacketChain()) {
  44             if (packetChain.getPacket() instanceof RawPacket) {
  45                 rawPacket = (RawPacket) packetChain.getPacket();
  46             } else if (packetChain.getPacket() instanceof EthernetPacket) {
  47                 ethernetPacket = (EthernetPacket) packetChain.getPacket();
  48             } else if (packetChain.getPacket() instanceof ArpPacket) {
  49                 arpPacket = (ArpPacket) packetChain.getPacket();
  50             }
  51         }
  52         if (rawPacket == null || ethernetPacket == null || arpPacket == null) {
  53             return;
  54         }
  55
  56         packetDispatcher.dispatchPacket(packetReceived.getPayload(), rawPacket.getIngress(),
  57                 ethernetPacket.getSourceMac(), ethernetPacket.getDestinationMac());
  58     }
  59
  60 }