使用SharpPcap发送虚假构造的伪IP的UDP数据包

发送虚假构造的伪IP的UDP数据包。
构造数据包经常出错！！！原因是很多属性没设置好。。我调试了很多次才发送成功！！！
private void SendPacket()
        {
            string strGateWayIp = "192.168.100.1";
            string strSouMac = new Class1().GetMACFromIP("192.168.100.106");//
            PcapDeviceList allDevices = SharpPcap.GetAllDevices();
            PcapDevice device = allDevices[0];
            NetworkDevice device2 = (NetworkDevice)device;
            int lLen = EthernetFields_Fields.ETH_HEADER_LEN;
            string strGateWayMac = new Class1().GetMACFromIP(strGateWayIp);//