MAC address to IP Address on Same LAN in C#

Question

Is there a way to find mapping between MAC address to IP address in C#. i think RARP should be able to do that, is there an API available in C# for that

Answer 1

Why not spawn a process to invoke rarp and read in the input stream from the process's output? That's a real cheap simple and cheerful way of doing it...top-of-my-head, it goes something like this:

System.Diagnostics.ProcessStartInfo ps = new System.Diagnostics.ProcessStartInfo("arp", "-a");
ps.CreateNoWindow = false;
ps.RedirectStandardOutput = true;
using (System.Diagnostics.Process proc = new System.Diagnostics.Process())
{
    proc.StartInfo = ps;
    proc.Start();
    System.IO.StreamReader sr = proc.StandardOutput;
    while (!proc.HasExited) ;
    string sResults = sr.ReadToEnd();
}

Then it's a matter of parsing the sResults to get the MAC address.

Hope this helps, Best regards, Tom.

Answer 2

In case you are looking for an API based approach and are not able to do a Process.Start() take a look at this:

http://www.codeproject.com/KB/IP/host_info_within_network.aspx

It allows mapping of hostname, IP address and MAC address.

Regards Rahul