async Task PipeB2A(CancellationToken cancellationToken)
{
//using (var received = SmartBuffer.Rent(_bufferSize))
var received = SmartBuffer.Rent(_bufferSize);
while (!cancellationToken.IsCancellationRequested)
{
received.SignificantLength = await ClientB.ReadAsync(received.Memory, cancellationToken);
_logger.LogInformation($"Received {received.SignificantLength} bytes from [{ClientB.EndPoint.ToString()}].");
if (0 >= received.SignificantLength)
{
ReportBroken(PipeBrokenCause.Exception);
return;
}
if (_filtersB.Count > 0)
{
var result = ExecuteFilter_AfterReading(ClientB, received, _filtersB, cancellationToken);
received.Dispose();
received = result.Buffer;
if (!result.Continue)
{
_logger.LogInformation($"Pipe broke by filterB [{ClientB.EndPoint.ToString()}].");
received?.Dispose();
ReportBroken(PipeBrokenCause.FilterBreak);
return;
}
}
if (_filtersA.Count > 0)
{
var result = ExecuteFilter_BeforeWriting(ClientA, received, _filtersA, cancellationToken);
received.Dispose();
received = result.Buffer;
if (!result.Continue)
{
_logger.LogInformation($"Pipe broke by filterA [{ClientA.EndPoint.ToString()}].");
received?.Dispose();
ReportBroken(PipeBrokenCause.FilterBreak);
return;
}
}
if (null != received && received.SignificantLength > 0)
{
_logger?.LogInformation($"{received.SignificantLength} bytes left after filtering.");
int written = await ClientA.WriteAsync(received.SignificanMemory, cancellationToken);
_logger?.LogInformation($"Pipe [{ClientB.EndPoint.ToString()}] => [{ClientA.EndPoint.ToString()}] {written} bytes.");
if (0 >= written)
{
received?.Dispose();
ReportBroken(PipeBrokenCause.Exception);
return;
}
ReportPiping(new PipingEventArgs {
Bytes = written, Origin = ClientB.EndPoint, Destination = ClientA.EndPoint
});
}
//continue piping
}//end while
received?.Dispose();
ReportBroken(PipeBrokenCause.Cancelled);
}
async Task PipeB2A(CancellationToken cancellationToken)
{
SmartBuffer buffer = SmartBuffer.Rent(_bufferSize);//read buff
buffer.SignificantLength = await ClientB.ReadAsync(buffer.Memory, cancellationToken);
if (buffer.SignificantLength > 0)
{
if (_filtersB.Count > 0)
{
bool locked = false;
try
{
DoFilter_Lock(ref locked);
PipeFilterResult filterResult = DoFilter_AfterReading(ref buffer, _filtersB, cancellationToken);
if (!filterResult.Continue || cancellationToken.IsCancellationRequested)
{
ReportBroken();
return;
}
else
{
buffer = filterResult.Buffer;
}
DoFilter_UnLock(ref locked);
}
finally
{
DoFilter_UnLock(ref locked);
}
}//end FilterB
if (_filtersA.Count > 0)
{
bool locked = false;
try
{
DoFilter_Lock(ref locked);
PipeFilterResult filterResult = DoFilter_BeforeWriting(ref buffer, _filtersA, cancellationToken);
if (!filterResult.Continue || cancellationToken.IsCancellationRequested)
{
ReportBroken();
return;
}
else
{
buffer = filterResult.Buffer;
}
DoFilter_UnLock(ref locked);
}
finally
{
DoFilter_UnLock(ref locked);
}
}//end FilterA
int written = await ClientA.WriteAsync(buffer.Memory, cancellationToken);//Pipe
_logger?.LogInformation($"DefaultPipe Pipe B to A {written} bytes.");
if (written < 0)
{
ClientA.Close();
buffer.Dispose();
ReportBroken();
return;
}
}
else if (0 == buffer.SignificantLength)
{
_logger?.LogInformation($"DefaultPipe read = 0.");
}
else//<0
{
_logger?.LogInformation($"DefaultPipe error, read={buffer.SignificantLength}.");
ClientB.Close();
ReportBroken();
return;
}
buffer.Dispose();//free memory.
if (!cancellationToken.IsCancellationRequested)
{
await PipeB2A(cancellationToken);//continue.
}
}
