private void StartWriting(byte[] buffer, int offset, int count, AsyncProtocolRequest asyncRequest)
{
// We loop to this method from the callback.
// If the last chunk was just completed from async callback (count < 0), we complete user request.
if (count >= 0)
{
byte[] outBuffer = null;
do
{
int chunkBytes = Math.Min(count, NegoState.MaxWriteDataSize);
int encryptedBytes;
try
{
encryptedBytes = _negoState.EncryptData(buffer, offset, chunkBytes, ref outBuffer);
}
catch (Exception e)
{
throw new IOException(SR.net_io_encrypt, e);
}
if (asyncRequest != null)
{
// prepare for the next request
asyncRequest.SetNextRequest(buffer, offset + chunkBytes, count - chunkBytes, null);
IAsyncResult ar = InnerStreamAPM.BeginWrite(outBuffer, 0, encryptedBytes, s_writeCallback, asyncRequest);
if (!ar.CompletedSynchronously)
{
return;
}
InnerStreamAPM.EndWrite(ar);
}
else
{
InnerStream.Write(outBuffer, 0, encryptedBytes);
}
offset += chunkBytes;
count -= chunkBytes;
} while (count != 0);
}
if (asyncRequest != null)
{
asyncRequest.CompleteUser();
}
}
//
//
private IAsyncResult BeginWrite(byte[] buffer, int offset, int count, AsyncCallback asyncCallback, object asyncState)
{
#if DEBUG
using (GlobalLog.SetThreadKind(ThreadKinds.User | ThreadKinds.Async))
{
#endif
_negoState.CheckThrow(true);
if (!_negoState.CanGetSecureStream)
{
return(InnerStreamAPM.BeginWrite(buffer, offset, count, asyncCallback, asyncState));
}
BufferAsyncResult bufferResult = new BufferAsyncResult(this, buffer, offset, count, true, asyncState, asyncCallback);
AsyncProtocolRequest asyncRequest = new AsyncProtocolRequest(bufferResult);
ProcessWrite(buffer, offset, count, asyncRequest);
return(bufferResult);
#if DEBUG
}
#endif
}