使用WinPcap（SharpPcap）实现ARP抓包以实现设备IP修改功能

参考上一篇：

使用WinPcap（SharpPcap）实现ARP抓包以实现设备IP搜索功能

搜索出设备后，需要修改设备IP网关掩码等信息

继续采用ARP包

getBas类似之前的，根据用户电脑的网卡物理地址mac，还有修改后的ip, netmask, gateway发送arp包
设备接收到后解析修改即可。

//遍历网卡
            foreach (var device in devices1)
            {
                if (!device.Description.ToLower().Contains("vmware") && !device.Description.ToLower().Contains("virtual"))//排除虚拟机网卡
                {
                    DeviceThread = new Thread(new ThreadStart(() =>
                    {
                        if (device.Addresses.Count > 0)
                        {
                            foreach (var address in device.Addresses)
                            {
                                if (address.Addr.type == SharpPcap.LibPcap.Sockaddr.AddressTypes.AF_INET_AF_INET6)
                                {
                                    if (address.Addr.ipAddress.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
                                    {
                                        localIP = address.Addr.ipAddress;
                                        break;
                                    }
                                }
                            }
                        }
                        foreach (var address in device.Addresses)
                        {
                            if (address.Addr.type == SharpPcap.LibPcap.Sockaddr.AddressTypes.HARDWARE)
                            {
                                localMAC = address.Addr.hardwareAddress;
                            }
                        }
                        var ethernetPacket = new EthernetPacket(localMAC, pmac, EthernetPacketType.Arp);
                        var arpPacket = new ARPPacket(getBas(mac, ip, netmask, gateway));
                        ethernetPacket.PayloadPacket = arpPacket;
                        device.Open();
                        device.SendPacket(ethernetPacket);
                        device.Close();
                    }));
                    DeviceThread.IsBackground = true;
                    DeviceThread.Start();
                }
            }