get MAC ID of remote machine

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Kumarforg - 12 Mar 2004 05:51 GMT

Hi

    how can one get the MAC address of a remote machine
        on an Ethernet LAN
    from a dotnet application ( without having a remote component on that machine
TI
regard
-Kumarforg

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Chris Taylor - 13 Mar 2004 11:28 GMT

Hi,

One way would be to send a ARP request to the remote machine. You could
interop to the SendARP function in iphlpapi.dll.

[DllImport("iphlpapi.dll")]
public static extern int SendARP( int DestIP, int SrcIP, [Out] byte[]
pMacAddr, ref int PhyAddrLen );

IPAddress addr = IPAddress.Parse("192.168.0.1");
byte[] mac = new byte[6];
int len = mac.Length;
SendARP( (int)addr.Address, 0, mac, ref len );
string macAddress = BitConverter.ToString( mac, 0, len );

The Address propery of IPAddress is marked as obsolete, so you will get a
warning.

Hope this helps

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Chris Taylor
http://dotnetjunkies.com/WebLog/chris.taylor/

> Hi,
>
[quoted text clipped - 4 lines]
> regards
> -Kumarforg

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