Source IP address of received UDP data

[xioTechnologies]

Please update the rsi_socket_async to expose the source IP address of a UDP message. This was supported by legacy RS9916 documentation but not the current SAPI .

Our current work around is to call the following function in the SPI HAL for every SPI transfer.

/**
 * @brief Extracts the IP address from the WLAN data response frame.
 * @param frame_ Frame.
 * @param numberOfBytes NumberOfBytes.
 */
void ExtractResponseFrameIPAddress(const void* const frame_, const size_t numberOfBytes) {

    typedef struct {

        union {
            uint16_t word0;

            struct {
                unsigned int frameLength : 12;
                unsigned int frameType : 4;
            } __attribute__((__packed__));
        };

        union {
            uint16_t word1;

            struct {

                union {
                    unsigned int commandID : 8;
                    unsigned int responseID : 8;
                } __attribute__((__packed__));
                unsigned int : 8;
            };
        };
        uint16_t word2;
        uint16_t word3;
        uint16_t word4;
        uint16_t word5;

        union {
            uint16_t word6;
            uint16_t status;
        };
        uint16_t word7;
        uint16_t ipVersion;
        uint16_t socketDescriptor;
        uint32_t bufferSize;
        uint16_t bufferOffset;
        uint16_t port;
        uint32_t ipAddress;
    } __attribute__((__packed__)) Frame;

    // Check number of bytes
    if (numberOfBytes < sizeof (Frame)) {
        return;
    }
    const Frame * const frame = (void*) frame_;

    // Check frame type
    const int FrameTypeWlanData = 5;
    if (frame->frameType != FrameTypeWlanData) {
        return;
    }

    // Check response ID
    const int ResponseIDDataReceived = 0x00;
    if (frame->responseID != ResponseIDDataReceived) {
        return;
    }

    // Extract IP address
    responseFrameIPAddress = frame->ipAddress;
}