RNDIS device class doesn't response to RNDIS_OID_802_3_PERMANENT_ADDRESS

I am implementing a full speed RNDIS device on STM32.
When connecting the device to a Linux host, the device couldn't be enumerated by the host.

dmesg on the host gave the following messages:
[ 4552.054215] usb 1-1.3: new full-speed USB device number 12 using dwc_otg
[ 4552.174704] usb 1-1.3: New USB device found, idVendor=0483, idProduct=5742, bcdDevice= 2.00
[ 4552.174739] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 4552.174756] usb 1-1.3: Product: STM32 RNDIS Device
[ 4552.174769] usb 1-1.3: Manufacturer: STMicroelectronics
[ 4552.174782] usb 1-1.3: SerialNumber: 000000000001
[ 4552.198983] rndis_host 1-1.3:1.0: RNDIS_MSG_QUERY(0x01010101) invalid response - off 16 len 4
[ 4552.199034] rndis_host 1-1.3:1.0: rndis get ethaddr, -33
[ 4552.204514] rndis_host 1-1.3:1.0: probe with driver rndis_host failed with error -33

Kernel version on the host:
6.12.25+rpt-rpi-v8

After checking the code in ux_device_class_rndis_msg_query.c/_ux_device_class_rndis_msg_query, oid "UX_DEVICE_CLASS_RNDIS_OID_802_3_PERMANENT_ADDRESS" is not handled indeed.
But the OID is mandatory(according to the comment in ux_device_class_rndis_initialize.c) and it presents in ux_device_class_rndis_oid_supported_list.

@py-ir0nf1st

Hi @py-ir0nf1st

can you try this fix with adding this snippet code in _ux_device_class_rndis_msg_query here:

usbx/common/usbx_device_classes/src/ux_device_class_rndis_msg_query.c

Line 327 in 515c9a4

`
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_remote_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;

`

@ayedm1

@ayedm1 It works.

#251

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RNDIS device class doesn't response to RNDIS_OID_802_3_PERMANENT_ADDRESS #250

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RNDIS device class doesn't response to RNDIS_OID_802_3_PERMANENT_ADDRESS #250

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ayedm1 commented on Feb 11, 2026

py-ir0nf1st commented on Feb 12, 2026

ayedm1 commented on Feb 16, 2026

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