/**
 * @return
 */
private ICMPPacket createPacket(final InetAddress destIp, final short hop) {
	final ICMPPacket packet = new ICMPPacket();
	packet.type = ICMPPacket.ICMP_ECHO;
	packet.seq = 100;
	packet.id = (short) RandomUtils.nextInt(0, 100);
	packet.setIPv4Parameter(0, false, false, false, 0, false, false, false, 0, 0, 0, IPPacket.IPPROTO_ICMP, _deviceIp, destIp);
	final String data = "ovtr";
	packet.data = data.getBytes();
	final EthernetPacket ether = new EthernetPacket();
	ether.frametype = EthernetPacket.ETHERTYPE_IP;
	ether.src_mac = _device.mac_address;
	ether.dst_mac = _gatewayMac;
	packet.datalink = ether;
	packet.hop_limit = hop;
	return packet;
}
 

private List<IPPacket> fragmentData(byte[] data, EthernetPacket eth)
{
	List<IPPacket> ret = new ArrayList<IPPacket>();
	
	short proto = (short) (data[9]&0xff);
	byte[] IPSRC = new byte[] {data[12], data[13], data[14], data[15]};
	byte[] IPDST = new byte[] {data[16], data[17], data[18], data[19]};
	    	
	IPPacket p = new IPPacket();
	IPPacket p2 = new IPPacket();
	try {
		p.setIPv4Parameter(0, false, false, false, 0, false, false, true, 0, 777, 128, proto, InetAddress.getByAddress(IPSRC), InetAddress.getByAddress(IPDST));
		p2.setIPv4Parameter(0, false, false, false, 0, false, false, false, 0, 777, 128, proto, InetAddress.getByAddress(IPSRC), InetAddress.getByAddress(IPDST));
   	} catch (Exception e) {}
	
	p.ident = 777;
	p2.ident = 777;
	p2.offset = (short) 0xb900;
	p.offset = 0;
	p.datalink = eth;
	p2.datalink = eth;
	byte[] tmp = new byte[1480];
	int j = 0;
	for (int i = 20; i < 1500; i++)
		tmp[j++] = data[i];
	p.data = tmp;
	tmp = null;
	tmp = new byte[data.length - 1500];
	j = 0;
	for (int i = 1500; i < data.length; i++)
		tmp[j++] = data[i];
	p2.data = tmp;
	
	ret.add(p);
	ret.add(p2);
	return ret;
}
 

private static void udp() throws Exception {
	int sourcePort = 42000;
	final int destinationPort = 33434;

	final InetAddress add = InetAddress.getByName(Util.getPublicIp());
	final NetworkInterface device = JpcapCaptor.getDeviceList()[1];
	final JpcapCaptor captor = JpcapCaptor.openDevice(device, 65535, false, 100);
	final InetAddress pingAddr = InetAddress.getByName(TEST_URL);

	final JpcapSender sender = captor.getJpcapSenderInstance();
	final InetAddress thisIP = JpcapTraceRoute.getIpOfDevice(device);
	final InetAddress dest = InetAddress.getByName(TEST_URL);
	short ttl = 1;
	for (int i = 0; i < 10; i++) {
		captor.setFilter("icmp and dst host " + thisIP.getHostAddress(), true);
		//			captor.setFilter("port " + destinationPort, true);
		//			captor.setFilter("icmp", true);
		final UDPPacket p = new UDPPacket(sourcePort++, destinationPort);
		//			p.setIPv4Parameter(0, false, false, false, 0, false, false, false, 0, 0, 0, IPPacket.IPPROTO_ICMP,
		//					thisIP, InetAddress.getByName("www.google.com"));
		p.setIPv4Parameter(0, false, false, false, 0, false, false, false, 0, 0, ttl++, IPPacket.IPPROTO_UDP,
				thisIP, dest);

		p.data = "ping".getBytes();

		final EthernetPacket ether = new EthernetPacket();
		ether.frametype = EthernetPacket.ETHERTYPE_IP;
		ether.src_mac = new byte[] { (byte) 0, (byte) 1, (byte) 2, (byte) 3, (byte) 4, (byte) 5 };
		ether.dst_mac = new byte[] { (byte) 0, (byte) 6, (byte) 7, (byte) 8, (byte) 9, (byte) 10 };
		p.datalink = ether;
		System.out.println("Send " + p);

		Packet ret = null;
		while (ret == null) {
			sender.sendPacket(p);
			ret = captor.getPacket();
			System.out.println("Got " + ret);
		}
	}
}
 

/**
 * @param tpt
 */
private void print(final IPPacket tpt, final int c) {
	System.out.println("Packet " + c);
	final int ppp = tpt.protocol;
	System.out.println("dest ip :" + tpt.dst_ip);
	System.out.println("source ip :" + tpt.src_ip);
	System.out.println("hop limit :" + tpt.hop_limit);
	System.out.println("identification field  :" + tpt.ident);
	System.out.println("packet length :" + tpt.length);
	System.out.println("packet priority  :" + (int) tpt.priority);
	System.out.println("type of service field" + tpt.rsv_tos);

	if (tpt.r_flag) {
		System.out.println("reliable transmission");
	} else {
		System.out.println("not reliable");
	}
	System.out.println("protocol version : " + (int) tpt.version);
	System.out.println("flow label field" + tpt.flow_label);

	final DatalinkPacket dp = tpt.datalink;
	final EthernetPacket ept = (EthernetPacket) dp;
	System.out.println("Destination mac address :" + ept.getDestinationAddress());
	System.out.println("Source mac address" + ept.getSourceAddress());

	if (ppp == IPPacket.IPPROTO_TCP) {
		System.out.println("TCP packet");
		final TCPPacket tp = (TCPPacket) tpt;
		System.out.println("destination port of tcp :" + tp.dst_port);
		if (tp.ack) {
			System.out.println("acknowledgement");
		} else {
			System.out.println("not an acknowledgment packet");
		}

		if (tp.rst) {
			System.out.println("reset connection ");
		}
		System.out.println("protocol version is :" + tp.version);
		System.out.println("destination ip " + tp.dst_ip);
		System.out.println("source ip" + tp.src_ip);
		if (tp.fin) {
			System.out.println("sender does not have more data to transfer");
		}
		if (tp.syn) {
			System.out.println("request for connection");
		}

	} else if (ppp == IPPacket.IPPROTO_ICMP) {
		final ICMPPacket ipc = (ICMPPacket) tpt;
		System.out.println("ICMP packet");
		// java.net.InetAddress[] routers=ipc.router_ip;
		//for(int t=0;t
		//  System.out.println("\n"+routers[t]);
		// }
		System.out.println("alive time :" + ipc.alive_time);
		System.out.println("number of advertised address :" + (int) ipc.addr_num);
		System.out.println("mtu of the packet is :" + (int) ipc.mtu);
		System.out.println("subnet mask :" + ipc.subnetmask);
		System.out.println("source ip :" + ipc.src_ip);
		System.out.println("destination ip:" + ipc.dst_ip);
		System.out.println("check sum :" + ipc.checksum);
		System.out.println("icmp type :" + ipc.type);
	} else if (ppp == IPPacket.IPPROTO_UDP) {
		final UDPPacket pac = (UDPPacket) tpt;
		System.out.println("UDP packet");
		System.out.println("source port :" + pac.src_port);
		System.out.println("destination port :" + pac.dst_port);
	}
	System.out.println("******************************************************");
}
 

/**
 * Return the value of the field packet
 * @return the value of packet
 */
public IPPacket getPacket() {
	return _packet;
}
 

/**
 * Set the value of the field packet
 * @param packet the new packet to set
 */
public void setPacket(final IPPacket packet) {
	_packet = packet;
}