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 import org.slf4j.Logger;
  17 import org.slf4j.LoggerFactory;
  18
  19 /**
  20  * ArpPacketHandler listens for incoming ARP packets and processes them.
  21  */
  22 public class ArpPacketHandler implements ArpPacketListener {
  23
  24     private final static Logger LOG = LoggerFactory.getLogger(ArpPacketHandler.class);
  25     private PacketDispatcher packetDispatcher;
  26
  27     public ArpPacketHandler(PacketDispatcher packetDispatcher) {
  28         this.packetDispatcher = packetDispatcher;
  29     }
  30
  31     /**
  32      * The handler function for ARP packets.
  33      *
  34      * @param packetReceived
  35      *            The incoming packet.
  36      */
  37     @Override
  38     public void onArpPacketReceived(ArpPacketReceived packetReceived) {
  39         if (packetReceived == null || packetReceived.getPacketChain() == null) {
  40             return;
  41         }
  42
  43         RawPacket rawPacket = null;
  44         EthernetPacket ethernetPacket = null;
  45         ArpPacket arpPacket = null;
  46         for (PacketChain packetChain : packetReceived.getPacketChain()) {
  47             if (packetChain.getPacket() instanceof RawPacket) {
  48                 rawPacket = (RawPacket) packetChain.getPacket();
  49             } else if (packetChain.getPacket() instanceof EthernetPacket) {
  50                 ethernetPacket = (EthernetPacket) packetChain.getPacket();
  51             } else if (packetChain.getPacket() instanceof ArpPacket) {
  52                 arpPacket = (ArpPacket) packetChain.getPacket();
  53             }
  54         }
  55         if (rawPacket == null || ethernetPacket == null || arpPacket == null) {
  56             return;
  57         }
  58
  59         packetDispatcher.dispatchPacket(packetReceived.getPayload(), rawPacket.getIngress(),
  60                 ethernetPacket.getSourceMac(), ethernetPacket.getDestinationMac());
  61     }
  62
  63 }