USBX RNDIS is not working on Linux + bugfix

[kulichbulich]

STM32CubeIde for MCU STM32U5A9NJHXQ (MCU package v1.6.0, USBX v6.2.0) generated incorrect RNDIS code. RNDIS is working on Windows but failed on Linux with this dmesg messages during enumeration:

[ 5043.521350] usb 5-1.1.3: new high-speed USB device number 17 using xhci_hcd
[ 5043.663724] usb 5-1.1.3: New USB device found, idVendor=0483, idProduct=5742, bcdDevice= 2.00
[ 5043.663740] usb 5-1.1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 5043.663784] usb 5-1.1.3: Product: STM32 USB Device
[ 5043.663791] usb 5-1.1.3: Manufacturer: STMicroelectronics
[ 5043.663796] usb 5-1.1.3: SerialNumber: 000000000001
[ 5043.724852] rndis_host 5-1.1.3:1.0: RNDIS_MSG_QUERY(0x01010101) invalid response - off 16 len 4
[ 5043.724869] rndis_host 5-1.1.3:1.0: rndis get ethaddr, -33
[ 5043.725371] rndis_host: probe of 5-1.1.3:1.0 failed with error -33

The problem is that message with RNDIS ID: 0x01010101 is not implemented. With this modification:

In file ux_device_class_rndis_msg_query.c

In function _ux_device_class_rndis_msg_query before default (line 327) put this code:

    case UX_DEVICE_CLASS_RNDIS_OID_802_3_PERMANENT_ADDRESS            :


        /* Save the Hardware address in the return message.   */
        _ux_utility_memory_copy(rndis_response + UX_DEVICE_CLASS_RNDIS_CMPLT_QUERY_INFO_BUFFER,
                                rndis -> ux_slave_class_rndis_local_node_id, UX_DEVICE_CLASS_RNDIS_NODE_ID_LENGTH); /* Use case of memcpy is verified. */

        /* Set the total response length.  */
        rndis_response_length = UX_DEVICE_CLASS_RNDIS_NODE_ID_LENGTH;

        break;

With this modification, the RNDIS device works correctly on both systems Linux and Windows.