Hardcoded CONFIG_USB_DEVICE_NETWORK_ECM_MAC

[Hiihtaja]

Hello !

In my case MAC address is taken from node configuration and need to be set during runtime.

But it seems to me it is hardcoded in source code

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/kconfig/index.html#!CONFIG_USB_DEVICE_NETWORK_ECM_MAC

https://github.com/nordic-krch/zephyr/blob/887f22306f3f5fe49a8335824dc692cad3e4f6b1/subsys/usb/device/class/netusb/function_ecm.c#L405C13-L405C46

I have created a variable and assigned mac address while mounting:

Is any way to do this in some other nice looking way ?

Regard,

Eugene

[Sigurd]

Hi!

I'm not familiar with this USB class. Maybe you can use the net_if_set_link_addr()  function. If that does not work, then I suggest either creating a Feature Request for this feature ,or open a new Pull Request with your suggested changes in upstream zephyr repo.

[Hiihtaja]

Hello !

Looks like API 

net_if_set_link_addr(iface_eth, "\x00\x00\x5e\x00\x53\xff", 6, NET_LINK_ETHERNET);

 have effect for native network interfaces but not for case when USB NET is mounted on top of ethernet.

This is the reason why the definition CONFIG_USB_DEVICE_NETWORK_ECM_MAC
is introduced and used.

I just wondering who is the owner of this code, NSC or native Zephyr ?

https://github.com/zephyrproject-rtos/zephyr/blob/60634902e085b01f0165b9585d4233ab4b0e7d86/subsys/usb/device/class/netusb/function_ecm.c#L403

Regards, Eugene

[Sigurd]

Hiihtaja said:

I just wondering who is the owner of this code, NSC or native Zephyr ?

We have employees working on this part of the code, but the code here is part of Zephyr upstream. So I think it makes most sense to either creating a Feature Request for this feature, or open a new Pull Request with your suggested changes in upstream zephyr repo. Feel free to post a link to the Feature Request(or PR) here afterwards.

[Hiihtaja]

Hello !

I have created an issue https://github.com/zephyrproject-rtos/zephyr/issues/61959

to see how Zephyr reacts to it.

Regards,

Eugene