C#通过ARP获取指定IP的MAC地址

C#通过ARP获取指定IP的MAC地址 ///

/// 调用API获取MAC地址 ///

/// IP地址 /// MAC地址 public static string GetMac(string p_Id) { IPAddress _Address; if (!IPAddress.TryParse(p_Id, out _Address)) return ""; uint DestIP = System.BitConverter.ToUInt32(_Address.GetAddressBytes(), 0); ulong pMacAddr = 0; uint PhyAddrLen = 6; uint error_code = SendARP(DestIP, 0, ref pMacAddr, ref PhyAddrLen); byte[] _Bytes1 =BitConverter.GetBytes(pMacAddr); return BitConverter.ToString(_Bytes1,0,6); } ///

/// 使用ARP获取MAC地址 ///

/// 目标IP /// 0 /// 两个uint 都是255 /// 长度6 /// 返回错误信息 [DllImport("Iphlpapi.dll")] public static extern uint SendARP(uint DestIP, uint SrcIP, ref ulong pMacAddr, ref uint PhyAddrLen);