Read incoming data available in the network buffers.

    size_t ( * receiveUpto )( void * pConnection,
                              uint8_t * pBuffer,
                              size_t bufferSize );

Reads bytes available in the network buffers into pBuffer.

If there is less data available than requested, it will return the available number of bytes.
If there is more data available than requested, it will fill the whole pBuffer.
If there is no data available, it will return 0.

Parameters

[in]	pConnection	The connection to receive data on, defined by the network stack.
[out]	pBuffer	The buffer to place the incoming network data.
[in]	bufferSize	The size of `pBuffer`.