+ private ARP createARP(short opCode, byte[] senderMacAddress, byte[] senderIP, byte[] targetMacAddress, byte[] targetIP) {
+ ARP arp = new ARP();
+ arp.setHardwareType(ARP.HW_TYPE_ETHERNET);
+ arp.setProtocolType(EtherTypes.IPv4.shortValue());
+ arp.setHardwareAddressLength((byte) 6);
+ arp.setProtocolAddressLength((byte) 4);
+ arp.setOpCode(opCode);
+ arp.setSenderHardwareAddress(senderMacAddress) ;
+ arp.setSenderProtocolAddress(senderIP);
+ arp.setTargetHardwareAddress(targetMacAddress);
+ arp.setTargetProtocolAddress(targetIP);
+ return arp;
+ }
+
+ private Ethernet createEthernet(byte[] sourceMAC, byte[] targetMAC, ARP arp) {
+ Ethernet ethernet = new Ethernet();
+ ethernet.setSourceMACAddress(sourceMAC);
+ ethernet.setDestinationMACAddress(targetMAC);
+ ethernet.setEtherType(EtherTypes.ARP.shortValue());
+ ethernet.setPayload(arp);
+ return ethernet;
+ }
+