.NET远程开机
应网友gx0754的建议将本软件进行了一些小改动,增加了历史记录功能。
之前,在家鼓弄BIOS时,知道了电脑可以远程开机,实际上就是利用网卡唤醒,学名呢,叫Wake-On-LAN,WOL。这技术比较早了,现在的板载网卡和普通网卡基本上全支持,有些需要在BIOS中设置。打开Wake On LAN和PWE功能。
这是我电脑的设置:
然后在操作系统里对网卡进行设置,打开设备管理器,选网卡,在高级选项卡中设置,如图:
如果你没有那些选项,你可以尝试更新一下网卡驱动。
网上说电源管理里的“允许这台设备使计算机脱离待机状态”要选上,其实不选也可以的。
根据经验,一定要在开机后,选择系统里的关机,才能实现远程开机,断电后就不灵了。实际上应该叫唤醒才对,关机后计算机进入S4模式,然后通过网卡唤醒。
接下来就是软件的事了,网上有不少,可以自己搜的,但我自己根据原理写了一个,测试没问题。
有兴趣可以下来玩玩(含源码,虽然自己的水平很差,但我相信肯定有比我更差的……囧)
WakeOnLAN.zip 单编写了一个WakeOnLAN类库,如果用的上的可以直接拿来用,包含计算广播地址,通过IP得到MAC地址等实用的功能。
简单的说就是向一个网络内发送Magic Package(一串特殊的序列)。据个例子解释一下,FF FF FF FF FF FF | 11 22 33 44 55 66 | 11 22 33 44 55 66 | 11 22 33 44 55 66 | 11 22 33 44 55 66 | 11 22 33 44 55 66 | 11 22 33 44 55 66 | 11 22 33 44 55 66 | 11 22 33 44 55 66 | 11 22 33 44 55 66 | 11 22 33 44 55 66 | 11 22 33 44 55 66 | 11 22 33 44 55 66 | 11 22 33 44 55 66 | 11 22 33 44 55 66 | 11 22 33 44 55 66 | 11 22 33 44 55 66,6byte的同步信号,这部分时不变的全是FF,接下来是重复16次MAC地址,很简单吧。之后通过UDP方式广播到子网,符合MAC地址的主机就会执行开机命令。
第一次贴代码,大家见笑了。
using System; using System.Net; using System.Net.Sockets; using System.Text; using System.Runtime.InteropServices; using System.Threading; /// <summary> /// 远程唤醒 /// </summary> public class WakeOnLAN { public enum NetType { Internet, Subnet } private static UdpClient listener; public WakeOnLAN() { } /// <summary> /// 域名转换为IP地址 /// </summary> /// <param name="hostname">域名或IP地址</param> /// <returns>IP地址</returns> public static string Hostname2ip(string hostname) { IPAddress ip; if (IPAddress.TryParse(hostname, out ip)) { return ip.ToString(); } else { return Dns.GetHostEntry(hostname).AddressList[0].ToString(); } } /// <summary> /// 处理监听到的数据的方法 /// </summary> /// <param name="bytes">接收到的数据</param> /// <param name="groupEP">接收地址</param> public delegate void ListenerHandler(byte[] bytes, IPEndPoint groupEP); /// <summary> /// 当监听到数据报 /// </summary> public static event ListenerHandler Listened; /// <summary> /// UDP监听器 /// </summary> /// <param name="port">端口号</param> public static void Listener(object port) { listener = new UdpClient((int)port); IPEndPoint groupEP = new IPEndPoint(IPAddress.Any, (int)port); try { while (true) { byte[] bytes = listener.Receive(ref groupEP); Listened(bytes, groupEP); } } catch (Exception e) { Console.WriteLine(e.ToString()); } finally { listener.Close(); } } private static Thread thd; /// <summary> /// 开始监听 /// </summary> /// <param name="port">要监听的端口号</param> public static void StartListener(int port) { thd = new Thread(new ParameterizedThreadStart(WakeOnLAN.Listener)); thd.Start(port); } /// <summary> /// 停止监听 /// </summary> public static void StopListener() { listener.Close(); thd.Abort(); } /// <summary> /// 唤醒远程主机 /// </summary> /// <param name="macAddress">MAC地址</param> /// <param name="ipAddress">IP地址</param> /// <param name="subnetMask">子网掩码</param> /// <param name="portNo">端口号</param> /// <param name="nt">网络类型</param> /// <returns>发送结果</returns> public static string WakeUp(string macAddress, string ipAddress, string subnetMask, string portNo, NetType nt) { IPAddress ip; IPAddress subnet; if (!IPAddress.TryParse(ipAddress.Replace(" ", ""), out ip)) return "IP Address error"; if (!IPAddress.TryParse(subnetMask, out subnet)) return "Subnet Mask error"; if (macAddress.Length != 17) return "MAC Address error"; int port; if (int.TryParse(portNo, out port) && (1 <= port && port <= 65535)) { string broadcast = GetBroadcast(ip, subnet, nt); return "Send to " + SendMagicPackage(broadcast, port, macAddress) + ":" + portNo; } else { return "Port Number error"; } } [DllImport("Iphlpapi.dll")] private static extern int SendARP(Int32 dest, Int32 host, ref Int64 mac, ref Int32 length); [DllImport("Ws2_32.dll")] private static extern Int32 inet_addr(string ip); /// <summary> /// 通过IP地址获取MAC(同一网段内) /// </summary> /// <param name="ipAddress">IP地址</param> /// <returns>MAC地址</returns> public static string GetMacAddress(string ipAddress) { IPAddress ip; if (!IPAddress.TryParse(ipAddress.Replace(" ", ""), out ip)) return "IP Address error"; Int32 ldest = inet_addr(ip.ToString()); Int64 macinfo = new Int64(); StringBuilder macAddress = new StringBuilder(); try { Int32 len = 6; int res = SendARP(ldest, 0, ref macinfo, ref len); string originalMACAddress = macinfo.ToString("X4"); if (originalMACAddress != "0000" && originalMACAddress.Length == 12) { for (int i = 0; i < 6; i++) { macAddress.Append(originalMACAddress.Substring(10 - i * 2, 2)); if (i < 5) { macAddress.Append("-"); } } } } catch (Exception) { return "No find MAC Address"; } return macAddress.ToString(); } /// <summary> /// 发送MagicPackage /// </summary> /// <param name="broadcast">广播地址</param> /// <param name="portNo">端口号</param> /// <param name="macAddress">MAC地址</param> /// <returns>成功时返回广播地址</returns> private static string SendMagicPackage(string broadcast, int portNo, string macAddress) { macAddress = macAddress.Replace(":", "").Replace("-", ""); byte[] sendBytes = new byte[102];//总数据长度=6位同步信号+16*6位MAC地址 for (int i = 0; i < 6; i++) { sendBytes[i] = 0xFF; } for (int i = 0; i < 16; i++) { for (int j = 0; j < 6; j++) { sendBytes[(i + 1) * 6 + j] = byte.Parse(macAddress.Substring(j * 2, 2), System.Globalization.NumberStyles.HexNumber); } } UdpClient udpClient = new UdpClient(); int b = 0; try { b = udpClient.Send(sendBytes, sendBytes.Length, broadcast, portNo); } catch (Exception) { return "Send error"; } finally { udpClient.Close(); } if (102 == b) return broadcast; else return "Send error"; } /// <summary> /// 获得广播地址 /// </summary> /// <param name="ipAddress">IP地址</param> /// <param name="subnetMask">子网掩码</param> /// <param name="nt">网络类型</param> /// <returns>广播地址</returns> public static string GetBroadcast(IPAddress ipAddress, IPAddress subnetMask, NetType nt) { if (nt == NetType.Internet) { byte[] ip = ipAddress.GetAddressBytes(); byte[] sub = subnetMask.GetAddressBytes(); for (int i = 0; i < ip.Length; i++) { ip[i] = (byte)((~sub[i]) | ip[i]);//广播地址=子网按位求反 或 IP地址 } return new IPAddress(ip).ToString(); } else { return "255.255.255.255"; } } }