如何使用 C# 获取 IP 地址的物理 (MAC) 地址？
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How do I obtain the physical (MAC) address of an IP address using C#?
提问by Iain
From C#, I want to do the equivalent of the following:
在 C# 中，我想做以下等效的操作：
arp -a |findstr 192.168.1.254
Alternatively, the answer could call the SendARPfunction and get the results.
或者，答案可以调用SendARP函数并获得结果。
This will allow my application to do some other processing that requires the MAC address.
这将允许我的应用程序执行一些需要 MAC 地址的其他处理。
采纳答案by jop
SendARP P/Invoke goes like this:
SendARP P/Invoke 是这样的：
[DllImport("iphlpapi.dll", ExactSpelling=true)]
public static extern int SendARP( int destIp, int srcIP, byte[] macAddr, ref uint physicalAddrLen );
PInvoke.NEThas this example:
PInvoke.NET有这个例子：
IPAddress dst = IPAddress.Parse("192.168.2.1"); // the destination IP address
byte[] macAddr = new byte[6];
uint macAddrLen = (uint)macAddr.Length;
if (SendARP(BitConverter.ToInt32(dst.GetAddressBytes(), 0), 0, macAddr, ref macAddrLen) != 0)
throw new InvalidOperationException("SendARP failed.");
string[] str = new string[(int)macAddrLen];
for (int i=0; i<macAddrLen; i++)
str[i] = macAddr[i].ToString("x2");
Console.WriteLine(string.Join(":", str));
回答by bugmagnet
回答by Douglas Anderson
To find your own:
要找到自己的：
Add a reference to System.Management
添加对 System.Management 的引用
ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
ManagementObjectCollection mcCol = mc.GetInstances();
foreach (ManagementObject mcObj in mcCol)
{
Console.WriteLine(mcObj["Caption"].ToString());
Console.WriteLine(mcObj["MacAddress"].ToString());
}
Not sure about finding that of another device.
不确定找到另一台设备的那个。
回答by Dominic Jonas
Here is my solution.
这是我的解决方案。
public static class MacResolver
{
/// <summary>
/// Convert a string into Int32
/// </summary>
[DllImport("Ws2_32.dll")]
private static extern Int32 inet_addr(string ip);
/// <summary>
/// The main funtion
/// </summary>
[DllImport("Iphlpapi.dll")]
private static extern int SendARP(Int32 dest, Int32 host, ref Int64 mac, ref Int32 len);
/// <summary>
/// Returns the MACAddress by a string.
/// </summary>
public static Int64 GetRemoteMAC(string remoteIP)
{
Int32 ldest = inet_addr(remoteIP);
try
{
Int64 macinfo = 0;
Int32 len = 6;
int res = SendARP(ldest, 0, ref macinfo, ref len);
return macinfo;
}
catch (Exception e)
{
return 0;
}
}
/// <summary>
/// Format a long/Int64 into string.
/// </summary>
public static string FormatMac(this Int64 mac, char separator)
{
if (mac <= 0)
return "00-00-00-00-00-00";
char[] oldmac = Convert.ToString(mac, 16).PadLeft(12, '0').ToCharArray();
System.Text.StringBuilder newMac = new System.Text.StringBuilder(17);
if (oldmac.Length < 12)
return "00-00-00-00-00-00";
newMac.Append(oldmac[10]);
newMac.Append(oldmac[11]);
newMac.Append(separator);
newMac.Append(oldmac[8]);
newMac.Append(oldmac[9]);
newMac.Append(separator);
newMac.Append(oldmac[6]);
newMac.Append(oldmac[7]);
newMac.Append(separator);
newMac.Append(oldmac[4]);
newMac.Append(oldmac[5]);
newMac.Append(separator);
newMac.Append(oldmac[2]);
newMac.Append(oldmac[3]);
newMac.Append(separator);
newMac.Append(oldmac[0]);
newMac.Append(oldmac[1]);
return newMac.ToString();
}
}
