TCPIP_UDP_GetIsReady Function

uint16_t TCPIP_UDP_GetIsReady(UDP_SOCKET hUDP); 

The number of bytes that can be read from this socket.

This function will return the number of bytes that are available in the specified UDP socket RX buffer.

The UDP socket queues incoming RX packets in an internal queue. If currently there is no RX packet processed (as a result of retrieving all available bytes with TCPIP_UDP_ArrayGet, for example), this call will advance the RX packet to be processed to the next queued packet. If a RX packet is currently processed, the call will return the number of bytes left to be read from this packet.

UDP socket should have been opened with TCPIP_UDP_ServerOpen/TCPIP_UDP_ClientOpen. hUDP - valid socket