FreeRTOS+TCP: Accept call does not return on connect if bPassQueued is not set (+ proposed fix) about amazon-freertos HOT 6 CLOSED

static void prvConnectionListeningTask( void *pvParameters )
{
struct freertos_sockaddr xClient, xBindAddress;
Socket_t xListeningSocket, xConnectedSocket;
socklen_t xSize = sizeof( xClient );
static const TickType_t xReceiveTimeOut = portMAX_DELAY;
const BaseType_t xBacklog = 20;

#if( ipconfigUSE_TCP_WIN == 1 )
	WinProperties_t xWinProps;

	/* Fill in the buffer and window sizes that will be used by the socket. */
	xWinProps.lTxBufSize = ipconfigTCP_TX_BUFFER_LENGTH;
	xWinProps.lTxWinSize = configECHO_SERVER_TX_WINDOW_SIZE;
	xWinProps.lRxBufSize = ipconfigTCP_RX_BUFFER_LENGTH;
	xWinProps.lRxWinSize = configECHO_SERVER_RX_WINDOW_SIZE;
#endif /* ipconfigUSE_TCP_WIN */

	/* Just to prevent compiler warnings. */
	( void ) pvParameters;

	/* Attempt to open the socket. */
	xListeningSocket = FreeRTOS_socket( FREERTOS_AF_INET, FREERTOS_SOCK_STREAM, FREERTOS_IPPROTO_TCP );
	configASSERT( xListeningSocket != FREERTOS_INVALID_SOCKET );

	/* Set a time out so accept() will just wait for a connection. */
	FreeRTOS_setsockopt( xListeningSocket, 0, FREERTOS_SO_RCVTIMEO, &xReceiveTimeOut, sizeof( xReceiveTimeOut ) );

	/* Set the window and buffer sizes. */
	#if( ipconfigUSE_TCP_WIN == 1 )
	{
		FreeRTOS_setsockopt( xListeningSocket, 0, FREERTOS_SO_WIN_PROPERTIES, ( void * ) &xWinProps, sizeof( xWinProps ) );
	}
	#endif /* ipconfigUSE_TCP_WIN */

	/* Bind the socket to the port that the client task will send to, then
	listen for incoming connections. */
	xBindAddress.sin_port = tcpechoPORT_NUMBER;
	xBindAddress.sin_port = FreeRTOS_htons( xBindAddress.sin_port );
	FreeRTOS_bind( xListeningSocket, &xBindAddress, sizeof( xBindAddress ) );
	FreeRTOS_listen( xListeningSocket, xBacklog );

	for( ;; )
	{
		/* Wait for a client to connect. */
		xConnectedSocket = FreeRTOS_accept( xListeningSocket, &xClient, &xSize );
		configASSERT( xConnectedSocket != FREERTOS_INVALID_SOCKET );

		/* Spawn a task to handle the connection. */
		xTaskCreate( prvServerConnectionInstance, "EchoServer", usUsedStackSize, ( void * ) xConnectedSocket, tskIDLE_PRIORITY, NULL );
	}
}