C# 在指定的IP地址中获得一个设备的MAC（物理）地址
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using System.Net; using System.Net.NetworkInformation; /// <summary> /// Holds utilities for working with networks, Ethernet, etc. /// </summary> public static class NetworkUtils { [System.Runtime.InteropServices.DllImport("iphlpapi.dll", ExactSpelling = true)] static extern int SendARP(int DestIP, int SrcIP, byte[] pMacAddr, ref int PhyAddrLen); /// <summary> /// Gets the MAC address (<see cref="PhysicalAddress"/>) associated with the specified IP. /// </summary> /// <param name="ipAddress">The remote IP address.</param> /// <returns>The remote machine's MAC address.</returns> public static PhysicalAddress GetMacAddress(IPAddress ipAddress) { const int MacAddressLength = 6; int length = MacAddressLength; var macBytes = new byte[MacAddressLength]; SendARP(BitConverter.ToInt32(ipAddress.GetAddressBytes(), 0), 0, macBytes, ref length); return new PhysicalAddress(macBytes); } } [TestClass()] public class NetworkUtilsTests { [TestMethod()] public void GetMacAddress_BroadcastIP_NonzeroMac() { IPAddress ipAddress = IPAddress.Broadcast; PhysicalAddress actual = NetworkUtils.GetMacAddress(ipAddress); Console.WriteLine(actual.ToString()); Assert.AreNotEqual(PhysicalAddress.None, actual); } } |
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