public static bool IsServiceAvailable()
{
string pipeName = null;
var callerProcessId = Process.GetCurrentProcess().Id;
string user = System.Security.Principal.WindowsIdentity.GetCurrent().User.Value;
while (callerProcessId > 0)
{
callerProcessId = ProcessHelper.GetParentProcessId(callerProcessId);
pipeName = NamedPipeNameFactory.GetPipeName(user, callerProcessId);
// Does the pipe exists?
if (NamedPipeUtils.ExistsNamedPipe(pipeName))
{
break;
}
pipeName = null;
// try grandfather.
}
return(pipeName != null);
}
public async Task <Connection> Connect(int?clientPid, bool failFast)
{
int timeoutMilliseconds = failFast ? 300 : 5000;
var server = ".";
string pipeName = null;
string user = System.Security.Principal.WindowsIdentity.GetCurrent().User.Value;
NamedPipeClientStream dataPipe = null;
NamedPipeClientStream controlPipe = null;
try
{
if (clientPid.HasValue)
{
pipeName = NamedPipeNameFactory.GetPipeName(user, clientPid.Value);
if (!NamedPipeUtils.ExistsNamedPipe(pipeName) && failFast)
{
// fail fast without timeout.
return(null);
}
}
else
{
var callerProcessId = Process.GetCurrentProcess().Id;
while (callerProcessId > 0)
{
callerProcessId = ProcessHelper.GetParentProcessId(callerProcessId);
pipeName = NamedPipeNameFactory.GetPipeName(user, callerProcessId);
// Does the pipe exists?
if (NamedPipeUtils.ExistsNamedPipe(pipeName))
{
break;
}
pipeName = null;
// try grandfather.
}
}
if (pipeName == null)
{
return(null);
}
dataPipe = new NamedPipeClientStream(server, pipeName, PipeDirection.InOut, PipeOptions.Asynchronous, System.Security.Principal.TokenImpersonationLevel.Identification, HandleInheritability.None);
await dataPipe.ConnectAsync(timeoutMilliseconds).ConfigureAwait(false);
controlPipe = new NamedPipeClientStream(server, pipeName + "_control", PipeDirection.InOut, PipeOptions.Asynchronous, System.Security.Principal.TokenImpersonationLevel.Identification, HandleInheritability.None);
await controlPipe.ConnectAsync(timeoutMilliseconds).ConfigureAwait(false);
Logger.Instance.Log($"Connected via Named Pipe {pipeName}.", LogLevel.Debug);
var conn = new Connection()
{
ControlStream = controlPipe,
DataStream = dataPipe,
};
return(conn);
}
catch (System.TimeoutException)
{
dataPipe?.Dispose();
controlPipe?.Dispose();
return(null);
}
catch
{
dataPipe?.Dispose();
controlPipe?.Dispose();
throw;
}
}
