arputil/arputil-impl/src/main/java/org/opendaylight/vpnservice/arputil/internal/ArpPacketUtil.java

   1 /*
   2  * Copyright (c) 2015 Ericsson India Global Services Pvt Ltd. 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
   9 package org.opendaylight.vpnservice.arputil.internal;
  10
  11 import org.opendaylight.controller.liblldp.EtherTypes;
  12 import org.opendaylight.controller.liblldp.PacketException;
  13 import org.opendaylight.vpnservice.mdsalutil.packet.ARP;
  14 import org.opendaylight.vpnservice.mdsalutil.packet.Ethernet;
  15
  16 public class ArpPacketUtil {
  17
  18     public static byte[] EthernetDestination_Broadcast = new byte[] { (byte) 0xFF, (byte) 0xFF, (byte) 0xFF,
  19             (byte) 0xFF, (byte) 0xFF, (byte) 0xFF };
  20     public static byte[] MAC_Broadcast = new byte[] { (byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0 };
  21
  22     public static byte[] getPayload(short opCode, byte[] senderMacAddress, byte[] senderIP, byte[] targetMacAddress,
  23             byte[] targetIP) throws PacketException {
  24         ARP arp = createARPPacket(opCode, senderMacAddress, senderIP, targetMacAddress, targetIP);
  25         Ethernet ethernet = createEthernetPacket(senderMacAddress, targetMacAddress, arp);
  26         return ethernet.serialize();
  27     }
  28
  29     public static ARP createARPPacket(short opCode, byte[] senderMacAddress, byte[] senderIP, byte[] targetMacAddress,
  30             byte[] targetIP) {
  31         ARP arp = new ARP();
  32         arp.setHardwareType(ARP.HW_TYPE_ETHERNET);
  33         arp.setProtocolType(EtherTypes.IPv4.shortValue());
  34         arp.setHardwareAddressLength((byte) 6);
  35         arp.setProtocolAddressLength((byte) 4);
  36         arp.setOpCode(opCode);
  37         arp.setSenderHardwareAddress(senderMacAddress);
  38         arp.setSenderProtocolAddress(senderIP);
  39         arp.setTargetHardwareAddress(targetMacAddress);
  40         arp.setTargetProtocolAddress(targetIP);
  41         return arp;
  42     }
  43
  44     public static Ethernet createEthernetPacket(byte[] sourceMAC, byte[] targetMAC, ARP arp)
  45             throws PacketException {
  46         Ethernet ethernet = new Ethernet();
  47         ethernet.setSourceMACAddress(sourceMAC);
  48         ethernet.setDestinationMACAddress(targetMAC);
  49         ethernet.setEtherType(EtherTypes.ARP.shortValue());
  50         ethernet.setPayload(arp);
  51         return ethernet;
  52     }
  53 }