ObjFW  Diff

							  length: length];
	} @catch (OFReadFailedException *e) {
		gnutls_transport_set_errno(stream->_session, e.errNo);
		return -1;
	}

	if (length == 0 && !stream.underlyingStream.atEndOfStream) {
		gnutls_transport_set_errno(stream->_session, EWOULDBLOCK);
		gnutls_transport_set_errno(stream->_session, EAGAIN);
		return -1;
	}

	return length;
}

static ssize_t
writeFunc(gnutls_transport_ptr_t transport, const void *buffer, size_t length)
{
	OFGnuTLSTLSStream *stream = (OFGnuTLSTLSStream *)transport;

	@try {
		[stream.underlyingStream writeBuffer: buffer length: length];
	} @catch (OFWriteFailedException *e) {
		gnutls_transport_set_errno(stream->_session, e.errNo);

		if (e.errNo == EWOULDBLOCK)
		if (e.errNo == EWOULDBLOCK || e.errNo == EAGAIN)
			return e.bytesWritten;

		return -1;
	}

	return length;
}

	if ((ret = gnutls_record_recv(_session, buffer, length)) < 0) {
		/*
		 * The underlying stream might have had data ready, but not
		 * enough for GnuTLS to return decrypted data. This means the
		 * caller might have observed the TLS stream for reading, got a
		 * ready signal and read - and expects the read to succeed, not
		 * to fail with EWOULDBLOCK, as it was signaled ready.
		 * to fail with EWOULDBLOCK/EAGAIN, as it was signaled ready.
		 * Therefore, return 0, as we could read 0 decrypted bytes, but
		 * cleared the ready signal of the underlying stream.
		 */
		if (ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN)
			return 0;

		/* FIXME: Translate error to errNo */

{
	ssize_t ret;

	if (!_handshakeDone)
		@throw [OFNotOpenException exceptionWithObject: self];

	if ((ret = gnutls_record_send(_session, buffer, length)) < 0) {
		/* FIXME: Translate error to errNo */
		int errNo = 0;

		if (ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN)
			errNo = EWOULDBLOCK;
			return 0;

		/* FIXME: Translate error to errNo */
		@throw [OFWriteFailedException exceptionWithObject: self
						   requestedLength: length
						      bytesWritten: ret
							     errNo: errNo];
							     errNo: 0];
	}

	return ret;
}

- (bool)hasDataInReadBuffer
{