private static async Task PingAsync(dynamic state)
{
object token = state.token;
byte ttl = state.ttl;
IPAddress Target = state.Target;
byte MaxHops = state.MaxHops;
Action <TraceRouteHostResult> OnHostResult = state.OnHostResult;
int PingTimeoutMs = state.PingTimeoutMs;
byte[] buffer = state.buffer;
PingOptions opt = new PingOptions(ttl, true);
Ping ping = PingInstancePool.Get();
Stopwatch sw = new Stopwatch();
sw.Start();
PingReply reply = await ping.SendPingAsync(Target, PingTimeoutMs, buffer, opt);
sw.Stop();
bool Success = reply.Status == IPStatus.Success || reply.Status == IPStatus.TtlExpired;
long RoundTripTime = reply.RoundtripTime;
IPAddress ReplyFrom = Success ? reply.Address : IPAddress.Any;
PingInstancePool.Recycle(ping);
TraceRouteHostResult result = new TraceRouteHostResult(token, Success, RoundTripTime, ReplyFrom, ttl, Target, MaxHops, PingTimeoutMs);
OnHostResult(result);
}
/// <summary>
/// Performs an asynchronous, multi-threaded traceroute operation.
/// </summary>
/// <param name="token">An object which should be passed through to the OnHostResult method.</param>
/// <param name="Target">The target host to ping.</param>
/// <param name="MaxHops">The maximum number of hops to try.</param>
/// <param name="OnHostResult">Callback method which will be called with the result of each individual ping.</param>
/// <param name="PingTimeoutMs">Timeout in milliseconds after which the ping should be considered unsuccessful.</param>
public static void TraceRoute(object token, IPAddress Target, byte MaxHops, Action <TraceRouteHostResult> OnHostResult, int PingTimeoutMs = 5000)
{
byte[] buffer = new byte[0];
for (byte ttl = 1; ttl <= MaxHops; ttl++)
{
PingOptions opt = new PingOptions(ttl, true);
Ping ping = PingInstancePool.Get();
ping.PingCompleted += Ping_PingCompleted;
Stopwatch sw = new Stopwatch();
sw.Start();
ping.SendAsync(Target, PingTimeoutMs, buffer, opt, new
{
sw,
token,
ttl,
Target,
MaxHops,
OnHostResult,
PingTimeoutMs
});
}
}
private static void Ping_PingCompleted(object sender, PingCompletedEventArgs e)
{
dynamic state = e.UserState;
Stopwatch sw = state.sw;
sw.Stop();
object token = state.token;
byte ttl = state.ttl;
IPAddress Target = state.Target;
byte MaxHops = state.MaxHops;
Action <TraceRouteHostResult> OnHostResult = state.OnHostResult;
int PingTimeoutMs = state.PingTimeoutMs;
bool Success = !e.Cancelled && (e.Reply.Status == IPStatus.Success || e.Reply.Status == IPStatus.TtlExpired);
long RoundTripTime = e.Reply.RoundtripTime;
IPAddress ReplyFrom = Success ? e.Reply.Address : IPAddress.Any;
((Ping)sender).PingCompleted -= Ping_PingCompleted;
PingInstancePool.Recycle((Ping)sender);
TraceRouteHostResult result = new TraceRouteHostResult(token, Success, RoundTripTime, ReplyFrom, ttl, Target, MaxHops, PingTimeoutMs);
OnHostResult(result);
}
