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 void EndWrite(IAsyncResult asyncResult)
{
#if DEBUG
using (GlobalLog.SetThreadKind(ThreadKinds.User))
{
#endif
_negoState.CheckThrow(true);
if (!_negoState.CanGetSecureStream)
{
InnerStreamAPM.EndWrite(asyncResult);
return;
}
if (asyncResult == null)
{
throw new ArgumentNullException("asyncResult");
}
BufferAsyncResult bufferResult = asyncResult as BufferAsyncResult;
if (bufferResult == null)
{
throw new ArgumentException(SR.Format(SR.net_io_async_result, asyncResult.GetType().FullName), "asyncResult");
}
if (Interlocked.Exchange(ref _NestedWrite, 0) == 0)
{
throw new InvalidOperationException(SR.Format(SR.net_io_invalidendcall, "EndWrite"));
}
// No "artificial" timeouts implemented so far, InnerStream controls timeout.
bufferResult.InternalWaitForCompletion();
if (bufferResult.Result is Exception)
{
if (bufferResult.Result is IOException)
{
throw (Exception)bufferResult.Result;
}
throw new IOException(SR.net_io_write, (Exception)bufferResult.Result);
}
#if DEBUG
}
#endif
}