TraceRoute and Ping in C#

Question

Does anyone have C# code handy for doing a ping and traceroute to a target computer? I am looking for a pure code solution, not what I\'m doing now, which is invoking the p

Answer 1

What follows is a significantly better C# implementation of tracert than exists in other answers thus far.

public static IEnumerable GetTraceRoute(string hostname)
{
    // following are similar to the defaults in the "traceroute" unix command.
    const int timeout = 10000;
    const int maxTTL = 30;
    const int bufferSize = 32;

    byte[] buffer = new byte[bufferSize];
    new Random().NextBytes(buffer);

    using (var pinger = new Ping())
    {
        for (int ttl = 1; ttl <= maxTTL; ttl++)
        {
            PingOptions options = new PingOptions(ttl, true);
            PingReply reply = pinger.Send(hostname, timeout, buffer, options);

            // we've found a route at this ttl
            if (reply.Status == IPStatus.Success || reply.Status == IPStatus.TtlExpired)
                yield return reply.Address;

            // if we reach a status other than expired or timed out, we're done searching or there has been an error
            if (reply.Status != IPStatus.TtlExpired && reply.Status != IPStatus.TimedOut)
                break;
        }
    }
}

Pitfalls fixed here that are present in other answers include:

• It's lazy. Ex: it properly uses enumerable / an iterator so don't have to compute the entire tree, you can stop at any point by breaking out of your own consuming loop.
• maxTTL implemented so the function doesnt spin on forever.
• bufferSize option which is consistent with other tracert implementations.
• It's super concise and clean. It's contained in a single method and is considerably shorter than other options here.